Climate and monthly weather forecastBolama, Guinea-Bissau
Climate and monthly weather forecast
The climate of Bolama
According to the Köppen climate classification, Bolama experiences a Tropical wet and dry or savanna climate (Aw). Situated in Guinea-Bissau, the city exhibits distinct weather patterns throughout the year. An in-depth understanding of these climatic parameters aids in drafting a meticulous account of weather conditions.The tropical location of Bolama contributes to an average high temperature fluctuating from 29.6°C (85.3°F) to 35.5°C (95.9°F) throughout the year. Concurrently, the city enjoys a mild low temperature ranging from 21.8°C (71.2°F) to 26°C (78.8°F). Therefore, Bolama experiences a rather comfortable year-round temperature with moderate variations. Coupled with these temperatures, the relative humidity level presents an oscillating pattern from 32% to 82% throughout the year, accentuating the sensation of heat during peak hours.
Rainfall in Bolama portrays a pronounced deviation across the year, with a significant bulk occurring between June to September ranging from 30mm (1.18") to 270mm (10.63"). Months from November to April remain virtually dry ensuring uninterrupted outdoor activities. The city features moderate sea temperatures from 25.4°C (77.7°F) to 28.6°C (83.5°F), inviting water enthusiasts year-round. Cloud coverage varies from 7% to 57% during the year, while wind speeds fluctuate between 9km/h (5.6mph) to 13.2km/h (8.2mph), indicating a generally calm atmosphere.
The best time to visit Bolama
Taking into account the climatic variables, the optimal time to visit Bolama is during the dry period between November and April. During these months, the rainfall is almost nonexistent and the average temperature remains in the comfortable range of lower 30s°C. Also, the sea temperature shows a pleasant range between 25.7°C (78.3°F) to 28.6°C (83.5°F) during this period, perfect for sea-related activities. Furthermore, daylight ranges around 12 hours providing ample time for sightseeing and outdoor pursuits.The worst time to visit Bolama
Conversely, the period between June and September aligns with the highest rainfall levels, reaching a peak of 270mm (10.63") in August. Apart from high precipitation, these months also witness the highest humidity levels, making it uncomfortably hot and damp. Therefore, it may hamper outdoor activities and sightseeing endeavors, which potentially makes it the least favorable season for a visit to Bolama.Spring weather in Bolama
The spring months, from March to May, bring hotter temperatures to Bolama with the high peaking at 35.5°C (95.9°F) in March. However, the nighttime temperature provides relief by dropping to lower 20s°C. Rainfall is minuscule from 1mm (0.04") in March and April to 7mm (0.28") in May. This season also witnesses sea temperatures warming up to range from 25.7°C (78.3°F) to 26.8°C (80.2°F).Summer weather in Bolama
Summer in Bolama, from June to August, coincides with the rainy season. Temperatures mildly drop during summer with an average high ranging from 30.7°C (87.3°F) to 32.8°C (91°F) and the low from 25°C (77°F) to 26°C (78.8°F). Rainfall notably peaks in August with 270mm (10.63"), while average sea temperature remains stable around 27.8°C (82°F) to 28°C (82.4°F), providing a refreshing respite.Autumn weather in Bolama
Autumn months from September to November manifest a transition from a wet to dry season. While September still experiences considerable rainfall of 132mm (5.2"), it drastically reduces to 50mm (1.97") in October and further to 8mm (0.31") in November. Temperature during these months range from a high of 30.5°C (86.9°F) to 34.3°C (93.7°F) and a low of 25°C (77°F) to 25.7°C (78.3°F). Notably, sea temperature peaks at 28.6°C (83.5°F) in November, inviting beach lovers.Winter weather in Bolama
Winter, covering December to February, marks the driest period in Bolama with minimal rainfall from 1mm (0.04") in December to zero in January and February. Simultaneously, the temperature maintains a comfortable level with the average high varying from 34°C (93.2°F) to 34.9°C (94.8°F) and the low from 21.8°C (71.2°F) to 22.1°C (71.8°F). Besides, the sea retains warmth with an average temperature hovering around 26.3°C (79.3°F) in December before slightly cooling to 25.4°C (77.7°F) in February.Weather in January
Bolama, Guinea-Bissau usually experiences its driest month in January, with rainfall measuring exactly 0mm (0"). High sea temperatures combine with high pressure to create a stable and dry atmospheric environment. The climate stays generally warm although it's not as hot compared to the upcoming months. Weather in January »Weather in February
With warmer air temperatures than January and the humidity index rising to 35%, February gives a hint of the wetter period to come. The daylight hours gradually increase, leading to brighter, lengthier days. The calm, tranquil weather typical of Bolama, Guinea-Bissau shifts slightly towards a more tropical pattern, however, it does not bring about any drastic changes this month. Weather in February »Weather in March
March presents slightly hotter conditions than February, reaching a peak high of 35.5°C (95.9°F). This month signals the start of Bolama's transition period from dry to wet season, with a slight increase in rainfall from the previous months. Weather in March »Weather in April
The heat in Bolama, Guinea-Bissau intensifies further to reach 35°C (95°F) in April. It is a period of balanced weather, not as dry as the preceding months but not as rainy as the months forthcoming. Slightly cooler sea temperatures provide a welcome contrast to the abundant sunshine that contributes to the warmer climate. Weather in April »Weather in May
May marks the turning point of the seasons with rainfall significantly increasing to 7mm (0.28"). This shift ushers in a period of heightened humidity in Bolama, taking the values up from the norm observed in the first quarter of the year. Weather in May »Weather in June
June brings about the most intense monsoon weather, with rainfall values sky-rocketing to 30mm (1.18"). It can be noted that this month carries the highest daytime temperatures recorded in the year, measuring 32.8°C (91°F). The heavy rainfall leads to the cloudiest period of the year, affecting both the amount of sunshine and daylight hours. Weather in June »Weather in July
In July, the weather conditions take a drastic change, with a rainfall increase peaking at 226mm (8.9"). This month presents the wettest period of the year, with 23.4 days of recorded rainfall. Despite this, the persistent rain does not overshadow the captivating beauty of Bolama, Guinea-Bissau. Weather in July »Weather in August
August maintains the trend of July, recording the maximum rainfall levels of the year, specifically at 270mm (10.63"). During this period, the temperature dips slightly, taking the edge off the intense heat experienced over the previous months. Weather in August »Weather in September
September ushers in an easing of rain with a drop down to 132mm (5.2"). During this period, Bolama begins to transition from the wet period back to the dry season. With less cloud coverage than the previous months, daylight hours begin to increase again. Weather in September »Weather in October
October boasts fewer rainy days than September, with rainfall levels decreasing significantly to about 50mm (1.97"). Temperature readings indicate a warming trend compared to the previous month, reaching 32.9°C (91.2°F) during this period. Weather in October »Weather in November
November presents another decrease in rainfall, making the city increasingly dry and marking the transition back to the arid season with precipitation falling to just 8mm (0.31"). The change in weather is noticeable as clear skies, sunshine, and lower humidity prevail, replacing the past months of frequent showers. Weather in November »Weather in December
December concludes the year with the return to predominantly dry conditions, with rainfall dwindling down to 1mm (0.04"). The slight dip in temperatures, recording 34°C (93.2°F) as the peak, signals the arrival of dry, sunny weather that persists into the New Year. Weather in December »Updated: Jul 8, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
With an average relative humidity of 32%, January is the least humid month.
In Bolama, rain does not fall in January and February.
In Bolama, during the entire year, the rain falls for 107.5 days and collects up to 726mm (28.58") of precipitation.
The months with the highest UV index are January through December, with an average maximum UV index of 7.
The months with the lowest UV index are January through December, with an average maximum UV index of 7.
With an average sea temperature of 25.4°C (77.7°F), February is the month with the coldest seawater.
March registers as the month with the average highest temperatures, reaching 35.5°C (95.9°F) at its peak and 22.8°C (73°F) at the lowest.
Months with rainfall are March through December.
March through May, with an average of 9.9h of sunshine, are months with the most sunshine.
June has the longest days of the year, with an average of 12h and 48min of daylight.
August is the coldest month of the year, registering average temperatures as high as 29.6°C (85.3°F) and as low as 25°C (77°F).
With an average relative humidity of 82%, August is the most humid month.
August is the month with the most rainfall in Bolama. Rain falls for 26.9 days and accumulates 270mm (10.63") of precipitation.
The month with the least sunshine is August, with an average of 6.1h of sunshine.
November is the month with the warmest seawater, with an average sea temperature of 28.6°C (83.5°F).
The month with the shortest days is December, with an average of 11h and 30min of daylight.
Bolama does not utilize Daylight Saving Time (DST). GMT timezone is used over the entire year.
Average temperature
Bolama, Guinea-Bissau
The warmest month (with the highest average high temperature) is March (35.5°C).
The month with the lowest average high temperature is August (29.6°C).
The month with the highest average low temperature is June (26°C).
The coldest month (with the lowest average low temperature) is January (21.8°C).
Average pressure
Bolama, Guinea-Bissau
- Average pressure in January:
1011.5mbar - Average pressure in February:
1010.5mbar - Average pressure in March:
1010.1mbar - Average pressure in April:
1010.1mbar - Average pressure in May:
1011.1mbar - Average pressure in June:
1012.6mbar
- Average pressure in July:
1012.9mbar - Average pressure in August:
1012.4mbar - Average pressure in September:
1012.2mbar - Average pressure in October:
1011.2mbar - Average pressure in November:
1010.6mbar - Average pressure in December:
1011.2mbar
The month with the highest atmospheric pressure is July (1012.9mbar).
The months with the lowest atmospheric pressure are March and April (1010.1mbar).
Average wind speed
Bolama, Guinea-Bissau
- Average wind speed in January:
11.2km/h - Average wind speed in February:
11.5km/h - Average wind speed in March:
11.6km/h - Average wind speed in April:
12.1km/h - Average wind speed in May:
13.1km/h - Average wind speed in June:
13.2km/h
- Average wind speed in July:
12.1km/h - Average wind speed in August:
12.1km/h - Average wind speed in September:
9.7km/h - Average wind speed in October:
9km/h - Average wind speed in November:
9km/h - Average wind speed in December:
10.6km/h
The windiest month (with the highest average wind speed) is June (13.2km/h).
The calmest months (with the lowest average wind speed) are October and November (9km/h).
Average humidity
Bolama, Guinea-Bissau
The month with the highest relative humidity is August (82%).
The month with the lowest relative humidity is January (32%).
Average rainfall
Bolama, Guinea-Bissau
The wettest month (with the highest rainfall) is August (270mm).
The driest months (with the least rainfall) are January and February (0mm).
Average rainfall days
Bolama, Guinea-Bissau
- Average rainfall days in January:
0.3 days - Average rainfall days in February:
0.4 days - Average rainfall days in March:
0.7 days - Average rainfall days in April:
2.2 days - Average rainfall days in May:
3.8 days - Average rainfall days in June:
9.2 days
- Average rainfall days in July:
23.4 days - Average rainfall days in August:
26.9 days - Average rainfall days in September:
20.7 days - Average rainfall days in October:
15.6 days - Average rainfall days in November:
3.6 days - Average rainfall days in December:
0.7 days
The month with the highest number of rainy days is August (26.9 days).
The month with the least rainy days is January (0.3 days).
Average sea temperature
Bolama, Guinea-Bissau
The best month for swimming (with the highest average sea temperature) is November (28.6°C).
The coldest month (with the lowest average sea temperature) is February (25.4°C).
Average daylight / Average sunshine
Bolama, Guinea-Bissau
- Average daylight in January:
11h and 30min - Average daylight in February:
11h and 48min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 24min - Average daylight in May:
12h and 42min - Average daylight in June:
12h and 48min
- Average daylight in July:
12h and 42min - Average daylight in August:
12h and 30min - Average daylight in September:
12h and 12min - Average daylight in October:
11h and 54min - Average daylight in November:
11h and 36min - Average daylight in December:
11h and 30min
The month with the longest days is June (Average daylight: 12h and 48min).
The month with the shortest days is December (Average daylight: 11h and 30min).
- Average sunshine in January:
9h and 42min - Average sunshine in February:
9h and 48min - Average sunshine in March:
9h and 54min - Average sunshine in April:
9h and 54min - Average sunshine in May:
9h and 54min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
6h and 54min - Average sunshine in August:
6h and 6min - Average sunshine in September:
7h and 30min - Average sunshine in October:
9h and 12min - Average sunshine in November:
9h and 42min - Average sunshine in December:
9h and 42min
The months with the most sunshine are March, April and May (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 6h and 6min).
Average sunshine days
Bolama, Guinea-Bissau
- Average sunshine days in January:
30.7 days - Average sunshine days in February:
27.6 days - Average sunshine days in March:
30.2 days - Average sunshine days in April:
27.8 days - Average sunshine days in May:
25.8 days - Average sunshine days in June:
20.2 days
- Average sunshine days in July:
5.6 days - Average sunshine days in August:
2.9 days - Average sunshine days in September:
8 days - Average sunshine days in October:
13.2 days - Average sunshine days in November:
24.3 days - Average sunshine days in December:
29.8 days
The month with the most sunshine days is January (30.7 days).
The month with the least sunshine days is August (2.9 days).
Average UV index
Bolama, Guinea-Bissau
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover
Bolama, Guinea-Bissau
The month with the most cloud cover is August (Cloud cover 57).
The months with the least cloud cover are March and April (Cloud cover 7).
Average visibility
Bolama, Guinea-Bissau
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (10km).
The months with the lowest visibility are July and August (9km).
