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Contents
- The climate of Alcatraz
- The best time to visit Alcatraz
- The worst time to visit Alcatraz
- Spring weather in Alcatraz
- Summer weather in Alcatraz
- Autumn weather in Alcatraz
- Winter weather in Alcatraz
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Alcatraz
Sitting in the Subtropical desert zone, the climate in Alcatraz, Cape Verde, can be characterized as BWh according to the Köppen climate classification. Coastline landscape gives the area a general arid climate with little precipitation and plenty of sunshine year round.
Throughout the year, Alcatraz experiences moderate to high temperatures. The high temperatures range from 24.3°C (75.7°F) to a pinnacle of 28.4°C (83.1°F), while the lowest temperature recorded is at 20.9°C (69.6°F), escalating to a crest of 25.8°C (78.4°F). Relative humidity is fairly consistent throughout the year, tracing a narrow path from 69% to a high-water mark of 79%.
Rainfall in Alcatraz bears the hallmark of its desert climate. Few minute traces are observed from 1mm (0.04") to 4mm (0.16") during the first half of the year, with a staggering jump to 50mm (1.97") in September. The frequency of rainy days follows a similar trend, culminating at an apex of 13.1 days in September. The island basks in ample sunlight with daylight hours oscillating between 11.2h and 13h. The annual average sunshine duration hovers between 7h and 9.9h, complemented by clear visibility of 10km (6.2mi) all year round.
Predominantly, the island hosts scattered clouds with denser cloud coverage observed during the late summer months, reaching a peak of 52% in August. There is a gentle ebb and flow of atmospheric pressure, traced from 1012.5mb to 1015.2mb. The velocity of the wind never remains static, blowing at less intense speeds from 14km/h (8.7mph) to 25.8km/h (16mph), and gusts trail from 18.6km/h (11.6mph) to a high level of 35km/h (21.7mph).
Throughout the year, Alcatraz experiences moderate to high temperatures. The high temperatures range from 24.3°C (75.7°F) to a pinnacle of 28.4°C (83.1°F), while the lowest temperature recorded is at 20.9°C (69.6°F), escalating to a crest of 25.8°C (78.4°F). Relative humidity is fairly consistent throughout the year, tracing a narrow path from 69% to a high-water mark of 79%.
Rainfall in Alcatraz bears the hallmark of its desert climate. Few minute traces are observed from 1mm (0.04") to 4mm (0.16") during the first half of the year, with a staggering jump to 50mm (1.97") in September. The frequency of rainy days follows a similar trend, culminating at an apex of 13.1 days in September. The island basks in ample sunlight with daylight hours oscillating between 11.2h and 13h. The annual average sunshine duration hovers between 7h and 9.9h, complemented by clear visibility of 10km (6.2mi) all year round.
Predominantly, the island hosts scattered clouds with denser cloud coverage observed during the late summer months, reaching a peak of 52% in August. There is a gentle ebb and flow of atmospheric pressure, traced from 1012.5mb to 1015.2mb. The velocity of the wind never remains static, blowing at less intense speeds from 14km/h (8.7mph) to 25.8km/h (16mph), and gusts trail from 18.6km/h (11.6mph) to a high level of 35km/h (21.7mph).
The best time to visit Alcatraz
Targeting a trip to Alcatraz during the period from December to April could give the best weather conditions. During this time, temperatures oscillate between 24.1°C (75.4°F) and 25.5°C (77.9°F), making for pleasantly warm, arid days. Additionally, these months account for the lowest rainfall levels, ranging from 1mm (0.04") to 3mm (0.12"), and an infrequent number of rainy days, between 0.7 and 3.3 days. A visit during these months ensures soaking in ample sunlight with longer sunshine hours ranging from 9.4h to 9.7h per day.
The worst time to visit Alcatraz
A visit during the months of August and September might be challenging due to variable weather conditions. During these months, Alcatraz receives the highest rainfall levels, soaring from 31mm (1.22") to 50mm (1.97"). Recorded humidity levels are also at a yearly high during this time, elevating to 79%. In addition to these conditions, sunlight is least abundant, with sunshine hours decreasing to the minimum annual level of 7h per day, and instances of denser cloud coverage increase significantly, particularly in August.
Spring weather in Alcatraz
During the months of March through May, Alcatraz sees the transition from lower to mid-range annual temperatures. Highs vary from 23.7°C (74.7°F) to 24.8°C (76.6°F) and lows hover between 21°C (69.8°F) and 22.2°C (72°F). Rainfall amounts remain relatively low in this period, from 1mm (0.04") to 3mm (0.12"), with rainy days varying from 2.1 to 3.3 days per month. It's worth noting that the daylight starts to increase during these months, from 12.1 hours to 12.8 hours, whilst sunshine duration rises from 9.6 hours to 9.9 hours.
Summer weather in Alcatraz
Summer is characteristically hot in Alcatraz, with temperatures from June through August ranging from 25°C (77°F) to 27.6°C (81.7°F) at the high end, and from 22.4°C (72.3°F) to 25.1°C (77.2°F) at the low end. Rainfall begins to rise, soaring from 3mm (0.12") in June to a whopping 31mm (1.22") in August. Correspondingly, the number of wet days jump to a notable 12.2 days in August. Despite this rise in precipitation, the daylight remains abundant, from 13 hours to 12.6 hours with sunshine duration mildly decreasing from 9.6 hours to 8 hours.
Autumn weather in Alcatraz
Autumn months in Alcatraz mark the end of the rainy season, with rainfall levels dropping from 50mm (1.97") in September to 10mm (0.39") in November. Likewise, the occurrences of rainy days fall to 2.6 days in November. Temperatures remain elevated, with highs navigating from 28.4°C (83.1°F) to 27°C (80.6°F) and lows between 25.8°C (78.4°F) and 24.5°C (76.1°F). In terms of solar conditions, daylight hours decrease from 12.2 hours to 11.4 hours, yet sunshine hours gain the momentum back, edging up from 8 hours to 9.2 hours.
Winter weather in Alcatraz
Wandering into winter months, December through February, Alcatraz exhibits a decline in temperature, with highs from 25.5°C (77.9°F) falling to 24.3°C (75.7°F), and lows descending from 23°C (73.4°F) to 21.8°C (71.2°F). Rainfall decreases to a scant amount of 1mm (0.04") to 3mm (0.12"), whilst the number of rainy days dwindles to 1.4 days in February. The daylight hours continue their decline to a yearly low of 11.2 hours in December, whereas sunshine hours seesaw between 9.4 hours and 9.5 hours, providing plenty of sunny moments during these mild winter months.
Weather in January
January in Alcatraz, Cape Verde, commences the year with moderate and soothing weather. The atmosphere remains mildly moist exhibiting a noteworthy relative humidity of around 69%. The city has fleeting rainfall during this month. Weather in January »
Weather in February
As the calendar moves to February, Alcatraz witnesses a slight increase in humidity from January's levels. Despite the humidity, the weather remains relatively dry and sunny, with temperatures marginally lower than the previous month. Weather in February »
Weather in March
March in Alcatraz is somewhat similar to February in terms of the atmospheric conditions. Human comfort levels are maintained as the temperature remains steady. Rainfall, though infrequent, brings a touch of refreshing relief. The month experiences plenty of invigorating sunshine, making it the ideal time for sunbathing and beach activities. Weather in March »
Weather in April
As Alcatraz residents bid goodbye to March, they prepare to receive more rainfall in April. The sunlight clocks around 12.5 hours daily, illuminating the vibrant cityscape. The average temperatures show a slight increase from the previous month, hinting at the arrival of the warm season. Weather in April »
Weather in May
May heralds the arrival of the warm season in Alcatraz, with the city experiencing a subtle rise in both temperature and humidity. Despite receiving slightly less rainfall than April, the city radiates under the sunshine. The longer daylight hours provide residents and tourists with numerous opportunities for outdoor activities. Weather in May »
Weather in June
Alcatraz, in June, is the epitome of tropical warmth, with an average high temperature peaking at 25°C (77°F). The skies remain mostly clear with reduced occurrence of rainfall. June is characterized by long and sunny days, well suitable for a beach vacation. Weather in June »
Weather in July
The climax of Alcatraz’s warm season is in July, as the temperature climbs up further. The robust sun displays its majesty with an average of 8 hours of sunshine daily. The month distinguishes itself from others with a remarkable amount of rainfall, recording an average of 4mm (0.16"). Weather in July »
Weather in August
August in Alcatraz is laden with charm as the city embraces a prominent shift in weather. The daylight hours show a slight decrease, with the sun shining approximately 12.6 hours a day. However, the city experiences a significant increase in rainfall, recording a hefty 31mm (1.22"). Weather in August »
Weather in September
September marks a definitive transition in weather as Alcatraz makes its way from the warm season to mildly cooler months. Rainfall reaches its peak with an whopping of 50mm (1.97"), the highest in the year. Nevertheless, temperatures remain uniformly high providing a warm ambiance throughout the city. Weather in September »
Weather in October
October brings a change in Alcatraz's mood as the month experiences a distinct reduction in rainfall from September's substantial showers. The sun still reigns with an average of 8.9 hours of illuminating sunshine. The decrease in rainfall does not signal a drop in temperatures as the city continues to bask in its tropical warmth. Weather in October »
Weather in November
With November comes the onset of a noticeable drop in temperature in Alcatraz. The rainfall reduces quite significantly from the previous month, settling at an average of 10mm (0.39"). Despite the minor adjustments in temperature and rainfall, sunshine, averaging at 9.2 hours daily, remains consistent giving the city its beamy appeal. Weather in November »
Weather in December
December in Alcatraz concludes the calendar year with a reduction in both temperature and rainfall from November. The city revels in clear skies with a decreased cloud% down to 20%. Despite this, the city does not entirely lose out on its tropical charm, courtesy of the enduring sunshine. Weather in December »
[Resources]Frequently asked questions
What is the least humid month in Alcatraz?
With an average relative humidity of 69%, January is the least humid month in Alcatraz, Cape Verde.
What is the driest month in Alcatraz?
The months with the least rainfall in Alcatraz, Cape Verde, are January, March and May Rain falls for 0.7 days and accumulates 1mm (0.04") of rain.
How many days does it rain in Alcatraz?
Throughout the year, in Alcatraz, there are 54.1 rainfall days, and 149mm (5.87") of precipitation is accumulated.
What is the month with the lowest UV index in Alcatraz?
The months with the lowest UV index in Alcatraz are January through July and December, with an average maximum UV index of 6.
What is the coldest month in Alcatraz?
The coldest period falls in February and March, when the average high-temperature reaches 23.7°C (74.7°F).
What month has the most sunshine in Alcatraz?
The month with the most sunshine is May, with an average of 9.9h of sunshine.
What are the most humid months in Alcatraz?
The months with the highest humidity are June through September, with an average relative humidity of 79%.
When are the longest days in Alcatraz?
June has the longest days of the year in Alcatraz, with an average of 13h and 0min of daylight.
What is the month with the least sunshine in Alcatraz?
The month with the least sunshine in Alcatraz is August, with an average of 7h of sunshine.
When is the highest UV index in Alcatraz?
The months with the highest UV index in Alcatraz are August through November, with an average maximum UV index of 7.
What is the rainiest month in Alcatraz?
September is the month with the most rainfall in Alcatraz, Cape Verde. Rain falls for 13.1 days and accumulates 50mm (1.97") of precipitation.
What are the warmest months in Alcatraz?
The highest temperatures in Alcatraz are recorded in October, with averages reaching a high of 28.4°C (83.1°F) and a low of 25.8°C (78.4°F).
What is the month with the shortest days in Alcatraz?
December has the shortest days of the year in Alcatraz, Cape Verde, with an average of 11h and 12min of daylight.
Is there Daylight Saving Time (DST) in Alcatraz?
Alcatraz does not utilize Daylight Saving Time (DST). -01 timezone is used throughout the entire year.
Average temperature
Alcatraz, Cape Verde
The warmest month (with the highest average high temperature) is October (28.4°C).
The months with the lowest average high temperature are February and March (23.7°C).
The months with the highest average low temperature are September and October (25.8°C).
The coldest month (with the lowest average low temperature) is February (20.9°C).
Average pressure
Alcatraz, Cape Verde
- Average pressure in January:
1015.2mbar - Average pressure in February:
1014.7mbar - Average pressure in March:
1014.3mbar - Average pressure in April:
1014mbar - Average pressure in May:
1014.3mbar - Average pressure in June:
1014.8mbar
- Average pressure in July:
1014mbar - Average pressure in August:
1012.7mbar - Average pressure in September:
1012.5mbar - Average pressure in October:
1012.7mbar - Average pressure in November:
1013.2mbar - Average pressure in December:
1014.4mbar
The month with the highest atmospheric pressure is January (1015.2mbar).
The month with the lowest atmospheric pressure is September (1012.5mbar).
Average wind speed
Alcatraz, Cape Verde
- Average wind speed in January:
25.1km/h - Average wind speed in February:
25.8km/h - Average wind speed in March:
23.8km/h - Average wind speed in April:
23km/h - Average wind speed in May:
22.2km/h - Average wind speed in June:
19km/h
- Average wind speed in July:
14.3km/h - Average wind speed in August:
14km/h - Average wind speed in September:
16.1km/h - Average wind speed in October:
17.5km/h - Average wind speed in November:
20.7km/h - Average wind speed in December:
23.2km/h
The windiest month (with the highest average wind speed) is February (25.8km/h).
The calmest month (with the lowest average wind speed) is August (14km/h).
Average humidity
Alcatraz, Cape Verde
The months with the highest relative humidity are June, July, August and September (79%).
The month with the lowest relative humidity is January (69%).
Average rainfall
Alcatraz, Cape Verde
The wettest month (with the highest rainfall) is September (50mm).
The driest months (with the least rainfall) are January, March and May (1mm).
Average rainfall days
Alcatraz, Cape Verde
- Average rainfall days in January:
0.7 days - Average rainfall days in February:
1.8 days - Average rainfall days in March:
2.1 days - Average rainfall days in April:
3.3 days - Average rainfall days in May:
1.3 days - Average rainfall days in June:
2.3 days
- Average rainfall days in July:
6.2 days - Average rainfall days in August:
12.2 days - Average rainfall days in September:
13.1 days - Average rainfall days in October:
7.1 days - Average rainfall days in November:
2.6 days - Average rainfall days in December:
1.4 days
The month with the highest number of rainy days is September (13.1 days).
The month with the least rainy days is January (0.7 days).
Average daylight / Average sunshine
Alcatraz, Cape Verde
- Average daylight in January:
11h and 2min - Average daylight in February:
11h and 4min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 3min - Average daylight in May:
12h and 5min - Average daylight in June:
13h and 0min
- Average daylight in July:
12h and 5min - Average daylight in August:
12h and 4min - Average daylight in September:
12h and 1min - Average daylight in October:
11h and 5min - Average daylight in November:
11h and 2min - Average daylight in December:
11h and 1min
The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 12min).
- Average sunshine in January:
9h and 3min - Average sunshine in February:
9h and 3min - Average sunshine in March:
9h and 4min - Average sunshine in April:
9h and 4min - Average sunshine in May:
9h and 5min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
8h and 0min - Average sunshine in August:
7h and 0min - Average sunshine in September:
8h and 0min - Average sunshine in October:
8h and 5min - Average sunshine in November:
9h and 1min - Average sunshine in December:
9h and 2min
The month with the most sunshine is May (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 7h and 0min).
Average sunshine days
Alcatraz, Cape Verde
- Average sunshine days in January:
29.3 days - Average sunshine days in February:
25.9 days - Average sunshine days in March:
28.8 days - Average sunshine days in April:
26.9 days - Average sunshine days in May:
29.3 days - Average sunshine days in June:
25.5 days
- Average sunshine days in July:
20.1 days - Average sunshine days in August:
13.9 days - Average sunshine days in September:
13.1 days - Average sunshine days in October:
22.3 days - Average sunshine days in November:
25.7 days - Average sunshine days in December:
28.5 days
The months with the most sunshine days are January and May (29.3 days).
The month with the least sunshine days is September (13.1 days).
Average UV index
Alcatraz, Cape Verde
The months with the highest UV index are August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July and December (UV index 6).
Average cloud cover
Alcatraz, Cape Verde
The month with the most cloud cover is August (Cloud cover 52).
The month with the least cloud cover is May (Cloud cover 13).
Average visibility
Alcatraz, Cape Verde
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Alcatraz, Cape Verde
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