Expand
Contents
- The climate of Poiso Alto
- The best time to visit Poiso Alto
- The worst time to visit Poiso Alto
- Spring weather in Poiso Alto
- Summer weather in Poiso Alto
- Autumn weather in Poiso Alto
- Winter weather in Poiso Alto
- 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 Poiso Alto
Poiso Alto, São Tomé and Príncipe, experiences the Köppen classification As climate, known as a tropical wet and dry or savanna climate with a pronounced 'summer' dry season. In such climates, warm temperatures prevail throughout the year, but rainfall varies considerably, with dry spells common in the summer months.
Looking at the weather aspect, temperatures show little variation with mild to warm highs ranging from 24.5°C (76.1°F) in July to 28.8°C (83.8°F) in March. Nightly lows range in a similar manner, varying from 23°C (73.4°F) in July to 27.5°C (81.5°F) in March. Humidity fluctuates slightly from year-round, typically in the high 70s to low 80s range, giving the air a somewhat muggy feeling throughout.
Rainfall demonstrates significant variation, with average monthly amounts picking up from a low of 9mm (0.35") in July, to a peak of 224mm (8.82") in November, while rainfall days also increase during this period. The level of sunshine received stays consistent at an average of 12.1 hours a day across the year, while sunshine hours range from 5 hours in August to 8.6 hours in February. Cloud cover fluctuates throughout the year, increasing from 37% in February to 65% in August, then decreasing to 41% in December.
Wind speed shows an interesting pattern, starting from a calm 10.8Kph in December and reaching its peak at 17.7Kph in July before tapering off. The wind gusts and maximum wind speed also follow a similar pattern.
Looking at the weather aspect, temperatures show little variation with mild to warm highs ranging from 24.5°C (76.1°F) in July to 28.8°C (83.8°F) in March. Nightly lows range in a similar manner, varying from 23°C (73.4°F) in July to 27.5°C (81.5°F) in March. Humidity fluctuates slightly from year-round, typically in the high 70s to low 80s range, giving the air a somewhat muggy feeling throughout.
Rainfall demonstrates significant variation, with average monthly amounts picking up from a low of 9mm (0.35") in July, to a peak of 224mm (8.82") in November, while rainfall days also increase during this period. The level of sunshine received stays consistent at an average of 12.1 hours a day across the year, while sunshine hours range from 5 hours in August to 8.6 hours in February. Cloud cover fluctuates throughout the year, increasing from 37% in February to 65% in August, then decreasing to 41% in December.
Wind speed shows an interesting pattern, starting from a calm 10.8Kph in December and reaching its peak at 17.7Kph in July before tapering off. The wind gusts and maximum wind speed also follow a similar pattern.
The best time to visit Poiso Alto
The prime period to visit Poiso Alto would be from May to September when the rainfall and number of rainy days are at their lowest. Simultaneously, the hours of sunshine are increasing from 5 hours in May to 7.6 hours in September. Visitors might find the humidity a bit troublesome as it increases slightly during this period. Still, the relatively lower rainfall more than compensates for it.
The worst time to visit Poiso Alto
November to February might constitute a less ideal time for tourists to plan their visit, primarily because of the high rainfall. Marks from 220mm (8.66") to 159mm (6.26") of monthly precipitation with substantial rainy days make outdoor sightseeing quite challenging. Although temperatures are slightly cooler during this period, the heightened humidity levels may cause discomfort.
Spring weather in Poiso Alto
From March to May, Poiso Alto sees a slight decrease in temperatures, decreasing from 28.8°C (83.8°F) in March to 27.8°C (82°F) in May. However, the humidity percentage increases slightly. Spring in Poiso Alto also comes with increasing levels of rainfall which jumps from 119mm (4.69") in March to 122mm (4.8") in May.
Summer weather in Poiso Alto
Poiso Alto's summer, from June to August, experiences a drop in temperatures and significantly less rainfall. The highest temperature decreases from 27.8°C (82°F) in June to 24.8°C (76.6°F) by August. At the same time, rainfall decreases from 22mm (0.87") in June to a mere 21mm (0.83") in August. However, cloud coverage increases, minimising the number of sunny days.
Autumn weather in Poiso Alto
By autumn, from September to November, rainy conditions prevail. The month of November faces the highest rainfall of the year at 224mm (8.82"). Temperature scales show a slight increase during this season, hitting a high of 27.1°C (80.8°F) in November. The average number of sunny hours also reduces during this period.
Winter weather in Poiso Alto
Winter in Poiso Alto does not witness a significant drop in temperatures. However, the humidity level during December is slightly less than during other months. Rainfall decreases from its peak in November to 159mm (6.26") in December. Despite being winter, the number of sunny hours increases gradually from the low in November, promising better visibility for visitors.
Weather in January
The calendar year in Poiso Alto, São Tomé and Príncipe, begins with the month of January that introduces a moderate climate. Intriguingly, January and its subsequent month share the same average daily sunlight hours, a relatively brisk trend that prevails throughout the year. Weather in January »
Weather in February
As January transitions into February, there is not much weather-related variance within Poiso Alto, São Tomé and Príncipe. February matches its predecessor in terms of average daily daylight and hours of sunshine while the drop in rainfall becomes evident. Weather in February »
Weather in March
The shift in climatic conditions continues throughout March. It's noted that the cloud cover and pressure have started their upward trajectory across Poiso Alto, São Tomé and Príncipe. March, bearing similarity to the preceding month, outdoes February in terms of rainfall, registering a 119mm (4.69") average in precipitation. Weather in March »
Weather in April
April introduces a relatively higher atmospheric pressure and cloud cover across Poiso Alto, São Tomé and Príncipe, maintaining the progressive pattern from March. The temperature range narrows down between 27.2°C (81°F) and 28.6°C (83.5°F) with the UV index refusing to budge. Weather in April »
Weather in May
May upholds the climatic uptrend in Poiso Alto, São Tomé and Príncipe by persisting in higher atmospheric pressure and cloud cover. A significant break in the pattern comes with declining sunshine hours, indirectly hinting at more overcast days. Weather in May »
Weather in June
June establishes itself as a unique entity in the annual weather catalog of Poiso Alto, São Tomé and Príncipe. Indicating a departure from the traditional sequence, June brings in an appreciable reduction in rainfall, experiencing a mere 22mm (0.87"). Weather in June »
Weather in July
July in Poiso Alto, São Tomé and Príncipe, does not deviate much from its predecessor, maintaining the trend of lowered precipitation and cooler temperature. This is remarkable due to the reduced rainfall readings of 9mm (0.35"), making it the driest month of the year. Weather in July »
Weather in August
August signals a reversal in trend after the anomalous dry spell in Poiso Alto, São Tomé and Príncipe. The humid tropical weather resurfaces with an increase in temperature, wind speed, and rainfall frequency. Cloud cover skyrockets to 65%, significantly reducing the duration of bright and clear days. Weather in August »
Weather in September
September presents itself as the herald of the rainy season in Poiso Alto, São Tomé and Príncipe. This is validated by an impressive leap in rainfall, which sees an upsurge from 21mm (0.83") to 35mm (1.38"). The relentless increase in humidity and cloud cover accompanies the month's wetness, adding to the overcast feel of the season. Weather in September »
Weather in October
October establishes itself as the wettest season in the yearly cycle for Poiso Alto, São Tomé and Príncipe. A tremendous escalation in precipitation is observed, with rainfall reaching a whopping 220mm (8.66"). This massive upturn ensues in concert with a significant increase in temperature and a drop in wind speed, which dips from 16.8km/h (10.4mph) to 14.2km/h (8.8mph). Weather in October »
Weather in November
Following the October deluge, November arouses interest with the continuation of heavy rainfall in Poiso Alto, São Tomé and Príncipe. The copious amount of rainfall reaches another peak value of 224mm (8.82"), despite warmer temperatures. Weather in November »
Weather in December
The year concludes with December marking the gradual receding of monsoon in Poiso Alto, São Tomé and Príncipe. Observing a decline in precipitation to a palpable 159mm (6.26") while the temperature range settling between 26.6°C (79.9°F) and 27.5°C (81.5°F) creates a sensation of relief from the wet spell. Weather in December »
[Resources]Frequently asked questions
How much does it rain in Poiso Alto?
Throughout the year, in Poiso Alto, there are 241.7 rainfall days, and 1287mm (50.67") of precipitation is accumulated.
What is the month with the shortest days in Poiso Alto?
January, November and December, with an average of 12h and 6min of daylight, are months with the shortest days.
What are the months with the highest UV index in Poiso Alto?
January through May, October through December, with an average maximum UV index of 7, are months with the highest UV index in Poiso Alto.
What month has the most sunshine in Poiso Alto?
The month with the most sunshine is February, with an average of 8.6h of sunshine.
What is the hottest time of year in Poiso Alto?
March, with average temperatures reaching a high of 28.8°C (83.8°F) and a low of 27.5°C (81.5°F), is the warmest month.
What is the least humid month in Poiso Alto?
With an average relative humidity of 76%, March is the least humid month in Poiso Alto.
When are the longest days in Poiso Alto?
With an average of 12h and 6min of daylight, June has the longest days of the year in Poiso Alto, São Tomé and Príncipe.
What is the coldest time of year in Poiso Alto?
Temperature records in Poiso Alto mark July as the coldest month, with highs averaging 24.5°C (76.1°F) and lows at 23°C (73.4°F).
What is the driest month in Poiso Alto?
The month with the least rainfall is July, when the rain falls for 8.4 days and typically collects 9mm (0.35") of precipitation.
What is the month with the lowest UV index in Poiso Alto?
The month with the lowest UV index is July, with an average maximum UV index of 5.
What are the most humid months in Poiso Alto?
The months with the highest humidity are August through October, with an average relative humidity of 83%.
What is the month with the least sunshine in Poiso Alto?
With an average of 5h of sunshine, August has the least sunshine of the year in Poiso Alto.
What is the rainiest month in Poiso Alto?
The month with the most rainfall in Poiso Alto is November, when the rain falls for 26.7 days and typically aggregates up to 224mm (8.82") of precipitation.
Is there Daylight Saving Time (DST) in Poiso Alto?
Poiso Alto, São Tomé and Príncipe, does not observe Daylight Saving Time (DST). GMT timezone is used over the entire year.
Average temperature
Poiso Alto, São Tomé and Príncipe
The warmest month (with the highest average high temperature) is March (28.8°C).
The month with the lowest average high temperature is July (24.5°C).
The month with the highest average low temperature is March (27.5°C).
The coldest month (with the lowest average low temperature) is July (23°C).
Average pressure
Poiso Alto, São Tomé and Príncipe
- Average pressure in January:
1010.7mbar - Average pressure in February:
1009.8mbar - Average pressure in March:
1009.9mbar - Average pressure in April:
1010.1mbar - Average pressure in May:
1011.3mbar - Average pressure in June:
1013.5mbar
- Average pressure in July:
1014.3mbar - Average pressure in August:
1014.1mbar - Average pressure in September:
1013.1mbar - Average pressure in October:
1011.4mbar - Average pressure in November:
1010.4mbar - Average pressure in December:
1010.6mbar
The month with the highest atmospheric pressure is July (1014.3mbar).
The month with the lowest atmospheric pressure is February (1009.8mbar).
Average wind speed
Poiso Alto, São Tomé and Príncipe
- Average wind speed in January:
11.1km/h - Average wind speed in February:
11.6km/h - Average wind speed in March:
11.7km/h - Average wind speed in April:
10.9km/h - Average wind speed in May:
13km/h - Average wind speed in June:
17.6km/h
- Average wind speed in July:
17.7km/h - Average wind speed in August:
17.1km/h - Average wind speed in September:
16.8km/h - Average wind speed in October:
14.2km/h - Average wind speed in November:
12.3km/h - Average wind speed in December:
10.8km/h
The windiest month (with the highest average wind speed) is July (17.7km/h).
The calmest month (with the lowest average wind speed) is December (10.8km/h).
Average humidity
Poiso Alto, São Tomé and Príncipe
The months with the highest relative humidity are August, September and October (83%).
The month with the lowest relative humidity is March (76%).
Average rainfall
Poiso Alto, São Tomé and Príncipe
- Average rainfall in January:
130mm - Average rainfall in February:
100mm - Average rainfall in March:
119mm - Average rainfall in April:
126mm - Average rainfall in May:
122mm - Average rainfall in June:
22mm
The wettest month (with the highest rainfall) is November (224mm).
The driest month (with the least rainfall) is July (9mm).
Average rainfall days
Poiso Alto, São Tomé and Príncipe
- Average rainfall days in January:
27.1 days - Average rainfall days in February:
23.4 days - Average rainfall days in March:
24.4 days - Average rainfall days in April:
22 days - Average rainfall days in May:
20.5 days - Average rainfall days in June:
7.3 days
- Average rainfall days in July:
8.4 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
15.8 days - Average rainfall days in October:
24.7 days - Average rainfall days in November:
26.7 days - Average rainfall days in December:
28.6 days
The month with the highest number of rainy days is December (28.6 days).
The month with the least rainy days is June (7.3 days).
Average daylight / Average sunshine
Poiso Alto, São Tomé and Príncipe
- Average daylight in January:
12h and 1min - Average daylight in February:
12h and 1min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 1min - Average daylight in May:
12h and 1min - Average daylight in June:
12h and 1min
- Average daylight in July:
12h and 1min - Average daylight in August:
12h and 1min - Average daylight in September:
12h and 1min - Average daylight in October:
12h and 1min - Average daylight in November:
12h and 1min - Average daylight in December:
12h and 1min
The month with the longest days is June (Average daylight: 12h and 6min).
The months with the shortest days are January, November and December (Average daylight: 12h and 6min).
- Average sunshine in January:
8h and 2min - Average sunshine in February:
8h and 4min - Average sunshine in March:
8h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
7h and 4min - Average sunshine in June:
6h and 2min
- Average sunshine in July:
6h and 0min - Average sunshine in August:
5h and 0min - Average sunshine in September:
5h and 2min - Average sunshine in October:
6h and 4min - Average sunshine in November:
7h and 0min - Average sunshine in December:
8h and 1min
The month with the most sunshine is February (Average sunshine: 8h and 36min).
The month with the least sunshine is August (Average sunshine: 5h and 0min).
Average sunshine days
Poiso Alto, São Tomé and Príncipe
- Average sunshine days in January:
3.1 days - Average sunshine days in February:
3.8 days - Average sunshine days in March:
5.3 days - Average sunshine days in April:
6.2 days - Average sunshine days in May:
9.2 days - Average sunshine days in June:
16.4 days
- Average sunshine days in July:
14.8 days - Average sunshine days in August:
8 days - Average sunshine days in September:
5.3 days - Average sunshine days in October:
2.7 days - Average sunshine days in November:
2 days - Average sunshine days in December:
1.5 days
The month with the most sunshine days is June (16.4 days).
The month with the least sunshine days is December (1.5 days).
Average UV index
Poiso Alto, São Tomé and Príncipe
The months with the highest UV index are January, February, March, April, May, October, November and December (UV index 7).
The month with the lowest UV index is July (UV index 5).
Average cloud cover
Poiso Alto, São Tomé and Príncipe
The month with the most cloud cover is August (Cloud cover 65).
The month with the least cloud cover is February (Cloud cover 37).
Average visibility
Poiso Alto, São Tomé and Príncipe
The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (10km).
The months with the lowest visibility are October and November (9km).
Poiso Alto, São Tomé and Príncipe
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location
