Climate and Average Weather Year Round in Guinea-Bissau

We show the climate in Guinea-Bissau by comparing the average weather in 2 representative places: Bissau and Cacheu.

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Average High and Low Temperature in Guinea-Bissau

Average High and Low Temperature in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°F100°F100°F105°F105°F776696857786791008779105NowNowCacheuCacheuBissauBissau
The daily average high and low air temperature at 2 meters above the ground. The thin dotted lines are the corresponding perceived temperatures.
Bissau 90°F94°F95°F94°F93°F90°F86°F85°F87°F89°F90°F89°F
Cacheu 90°F94°F96°F95°F94°F91°F88°F86°F88°F90°F91°F89°F
Bissau 66°F68°F71°F73°F75°F76°F76°F76°F75°F76°F74°F68°F
Cacheu 67°F68°F70°F71°F74°F77°F76°F76°F76°F76°F73°F68°F


Average Hourly Temperature in BissauJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowcomfortablewarmhothotcomfortable


Average Hourly Temperature in CacheuJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowcomfortablewarmwarmhotcomfortablesweltering
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Chance of Clearer Skies in Guinea-Bissau

Chance of Clearer Skies in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%621762NowNowCacheuCacheuBissauBissau
The percentage of time the sky is clear, mostly clear, or partly cloudy (i.e., less than 60% of the sky is covered by clouds).
Clearer SkiesJanFebMarAprMayJunJulAugSepOctNovDec
Bissau 56%61%61%58%51%33%21%18%18%22%41%49%
Cacheu 56%60%62%60%55%37%24%19%18%23%42%49%

Daily Chance of Precipitation in Guinea-Bissau

Daily Chance of Precipitation in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%91NowNowCacheuCacheuBissauBissau
The percentage of days in which precipitation is observed, excluding trace quantities.
Days of Precip.JanFebMarAprMayJunJulAugSepOctNovDec
Bissau 0.1d0.1d0.0d0.1d3.4d14.0d24.5d27.8d24.8d12.4d1.1d0.0d
Cacheu 0.1d0.1d0.1d0.1d2.0d11.4d22.7d26.8d23.5d11.0d0.8d0.0d

Average Monthly Rainfall in Guinea-Bissau

Average Monthly Rainfall in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in16.315.1NowNowCacheuCacheuBissauBissau
The average rainfall accumulated over the course of a sliding 31-day period centered on the day in question.
Bissau 0.0″0.0″0.0″0.0″0.8″4.7″11.8″16.3″12.7″4.5″0.3″0.0″
Cacheu 0.0″0.0″0.0″0.0″0.5″3.8″10.6″15.1″11.3″3.8″0.3″0.0″

Hours of Daylight in Guinea-Bissau

Hours of Daylight in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec4 hr4 hr6 hr6 hr8 hr8 hr10 hr10 hr12 hr12 hr14 hr14 hr16 hr16 hr18 hr18 hr20 hr20 hr12.811.4NowNowCacheuCacheuBissauBissau
The number of hours during which the Sun is at least partly above the horizon.
Bissau 11.5h11.8h12.1h12.4h12.7h12.8h12.7h12.5h12.2h11.9h11.6h11.4h
Cacheu 11.5h11.7h12.1h12.4h12.7h12.8h12.8h12.5h12.2h11.8h11.6h11.4h

Chance of Muggy Conditions in Guinea-Bissau

Chance of Muggy Conditions in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%1005NowNowCacheuCacheuBissauBissau
The percentage of time that is muggy, oppressive, or miserable (i.e., a dew point greater than 65°F).
Muggy daysJanFebMarAprMayJunJulAugSepOctNovDec
Bissau 2.1d5.1d11.9d19.4d27.3d29.7d31.0d31.0d30.0d30.7d23.2d7.6d
Cacheu 2.9d4.9d10.5d19.3d28.1d29.8d31.0d31.0d30.0d30.8d24.0d9.4d

Average Wind Speed in Guinea-Bissau

Average Wind Speed in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mph8.
The average of mean hourly wind speeds at 10 meters above the ground.
Wind Speed (mph)JanFebMarAprMayJunJulAugSepOctNovDec

Average Water Temperature in Guinea-Bissau

Average Water Temperature in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec74°F74°F76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°F857674NowNowCacheuCacheuBissauBissau
The daily average wide-area surface water temperature.
Water Temp.JanFebMarAprMayJunJulAugSepOctNovDec
Bissau 77°F76°F77°F79°F81°F82°F82°F82°F82°F84°F84°F80°F
Cacheu 74°F74°F75°F76°F78°F81°F82°F82°F83°F84°F83°F78°F

Tourism Score in Guinea-Bissau

Tourism Score in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.32.0NowNowCacheuCacheuBissauBissau
The tourism score, which favors clear, rainless days with perceived temperatures between 65°F and 80°F.

Beach/Pool Score in Guinea-Bissau

Beach/Pool Score in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.43.27.3NowNowCacheuCacheuBissauBissau
The beach/pool score, which favors clear, rainless days with perceived temperatures between 75°F and 90°F.

Growing Season in Guinea-Bissau

Growing Season in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec0%0%20%20%40%40%60%60%80%80%100%100%NowNowCacheuCacheuBissauBissau
The percentage chance that a given day is within the growing season, defined as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Growing Degree Days in Guinea-Bissau

Growing Degree Days in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°F12,000°F12,000°FNowNowCacheuCacheuBissauBissau
The average growing degree days accumulated over the course of the year, where growing degree days are defined as the integral of warmth above a base temperature (50°F in this case).

Average Daily Incident Shortwave Solar Energy in Guinea-Bissau

Average Daily Incident Shortwave Solar Energy in Guinea-BissauJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh7.04.0NowNowCacheuCacheuBissauBissau
The average daily shortwave solar energy reaching the ground per square meter.
Solar Energy (kWh)JanFebMarAprMayJunJulAugSepOctNovDec

This report illustrates the typical weather for Bissau and Cacheu year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

The details of the data sources used on this page vary between places and are discussed in detail on each place's dedicated page:


The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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