Climate and monthly weather forecastBrazzaville, Congo
Climate and monthly weather forecast
The climate of Brazzaville
Situated in the southern hemisphere, Brazzaville, the capital city of the Republic of Congo, has a predominant Köppen climate classification of Aw, also known as Tropical wet and dry or Savanna climate. This climate definition depicts a distinct dry season in the winter and a rainy season during summer months.Brazzaville experiences almost similar temperature conditions throughout the year. The highest average temperature ranges from 29.5°C (85.1°F) to 33.1°C (91.6°F), while the low fluctuates from 20.8°C (69.4°F) to 22.9°C (73.2°F). This constancy in the temperature spectrum is influenced by the city's equatorial location. However, elevated humidity levels from 55% to 83% throughout the year, contribute to the perceived heat and pose challenges to comfort levels.
Rainfall in Brazzaville exhibits a pronounced pattern. The majority of rainfall happens between January to May where readings reach from 101mm (3.98") to 123mm (4.84"), with noticeable dip from June to September plunging down to just 11mm (0.43") in June and 2mm (0.08") in July . This significant drop in rainfall characterizes the dry season in the city.
Wind speed in Brazzaville is relatively stable, with average speeds spanning from 4.7km/h (2.9mph) to 5.6km/h (3.5mph), excluding the brief uptick observed from June to September which sees wind speeds up to 7.5km/h (4.7mph) to 8.6km/h (5.3mph). Sunshine hours exhibit similar patterns throughout most of the year, dropping from 9.1 hours to 7 hours in June and then picking up speed to go back up to 9.5 hours in August. This sunshine trend is worth noting for those desiring maximum sun exposure.
The best time to visit Brazzaville
The ideal time to visit Brazzaville would be during the dry season. Particularly, from June to September, rainfall drops to minimal levels, ranging from 2mm (0.08") to 11mm (0.43"). These dry months are also marked by moderate temperatures, with high levels fluctuating between 30.7°C (87.3°F) to 33.1°C (91.6°F) and lows between 20.8°C (69.4°F) to 22.1°C (71.8°F). These conditions yield comfortable outdoor explorations thanks to the city's increased visibility of up to a consistent 10km (6.2mi) during these months.The worst time to visit Brazzaville
It would be unwise to plan a visit to Brazzaville during the rainy months starting from October to December, and from January to May. Rainfall during those months intensifies, with the highest reaching 173mm (6.81") in November. Coupled with relative humidity of up to 83%, these wet conditions can make for uncomfortable outdoor activities with the risk of flooding in certain areas.Spring weather in Brazzaville
In Brazzaville, spring corresponds to the Northern Hemisphere's autumn, spanning from September to November. It is marked by a shift from the dry to wet season. Average rainfall starts to rise from a low of 7mm (0.28") in September up to 173mm (6.81") in November, while humidity begins to mount, increasing from 55% in September to 82% in November. The temperature remains constant within the range of 29.5°C (85.1°F) to 31.1°C (88°F).Summer weather in Brazzaville
During summer, from December to February, Brazzaville experiences regular rainfall with the monthly average being between 110mm (4.33") and 123mm (4.84"). This season is characterized by high temperatures and high humidity. The temperature ranges from 29.8°C (85.6°F) to 31.3°C (88.3°F) for the high and 21.5°C (70.7°F) to 22.3°C (72.1°F) for the low, while the humidity averages 80%. Despite the regular showers, daily sunshine hours stay relatively high with the average daylight hours ranging from 12.3 to 12.4 hours per day.Autumn weather in Brazzaville
The autumn season - spanning March to May - sees higher rainfall figures; from 115mm (4.53") in March to 101mm (3.98") in May, and an increased cloud cover. This period has slightly lower daylight hours that fall around 12 hours per day. The temperature does not change considerably with highs ranging around 31°C (87.8°F).Winter weather in Brazzaville
The winter season in Brazzaville, which corresponds to the Northern Hemisphere's summer - from June to August - sees a drastic fall in rainfall from 41mm (1.61") in June to minimal 2mm (0.08") in July. Temperature highs and sunlight hours remain fairly constant, providing quite agreeable conditions for outdoor activities during this season. The wind speeds show an increase, with wind gusts reaching up to 12km/h (7.5mph) making the thermal sensation somewhat cooler.Weather in January
Kicking off the year, January in Brazzaville, Congo presents warm conditions, noticeable by the substantial heat. This period also experiences high levels of humidity, creating a relatively sticky environment. January brings the city abundant rainfall amounting to 110mm (4.33") over approximately 27 days during the month. Weather in January »Weather in February
Following the January trend, February in Brazzaville continues with relatively high temperatures and steady relative humidity. Slightly increasing rain levels result in 121mm (4.76") of rainfall during this period. The city also experiences an extended amount of sunshine and daylight spreading warmth throughout Brazzaville. Weather in February »Weather in March
The weather takes a slightly different turn in March, remaining equal with respect to the city's mundane hot humid weather. The highlight in March features a decrease in sunshine hours to 8.5 hours per day. Albeit a slight decrease in wind speed, the relative humidity and temperatures remain constant. Weather in March »Weather in April
April in Brazzaville showcases a heavy precipitation pattern with around 123mm (4.84") rainfall distributed over 25 days of showers. The conditions turn a bit cooler compared to previous months with the average low and high temperatures showing a slight drop. Weather in April »Weather in May
In contrast to the previous months, Brazzaville in May witnesses a significant drop in the rainfall levels amounting to 101mm (3.98"). As summer takes its course, the humidity stays constant while heat reaches its peak during this period. Weather in May »Weather in June
June marks a remarkable shift in Brazzaville’s climate with a decrease in rainfall to only 11mm (0.43") spread across 7 days within the month. The city witnesses a decrease in humidity making it much less sticky than it has been for the past few months. Weather in June »Weather in July
Weather in Brazzaville takes a drier turn with a minimum rainfall level recorded in the year amounting to 2mm (0.08"). Heat peaks in July with the temperature reaching up to 32.2°C (90°F), combining with reduced humidity levels to present a warm and dry environment. Weather in July »Weather in August
August in Brazzaville persists with a dry spell, but precipitation amounts increase slightly to 7mm (0.28"). The heat continues, and wind speeds pick up further, peaking at 8.6km/h (5.3mph). Though humidity levels rise slightly compared to July, they remain moderately low. Weather in August »Weather in September
With the arrival of September, Brazzaville witnesses a slight incline in the rainfall, amounting to 41mm (1.61") over the course of the month. The atmospheric pressure rests at 1011.9mb. Meanwhile, the overall weather stays welcoming as the city encounters a drop in temperature. Weather in September »Weather in October
October showcases a substantial hike in precipitation levels in Brazzaville, collecting 138mm (5.43") of rainfall. Humidity levels also see an upward trend, adding a bit of stickiness to the environment. This month offers fewer sunshine days, with clearer skies becoming rarer. Weather in October »Weather in November
In November, Brazzaville experiences the maximum rainfall of the year with the precipitation amount reaching a high of 173mm (6.81"). The weather turns cooler and the daylight duration increases gradually compared to the previous months. Weather in November »Weather in December
Capping off the year, December in Brazzaville offers similar weather to November, punctuated with high rainfall at 167mm (6.57"). Despite being the last month of the year, December sees no significant change in the temperature or wind levels. Weather in December »Updated: Feb 6, 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
Throughout the year, in Brazzaville, Congo, there are 243.1 rainfall days, and 1109mm (43.66") of precipitation is accumulated.
January, March through May, July through September, with an average maximum UV index of 7, are months with the highest UV index in Brazzaville, Congo.
February, June, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Brazzaville, Congo.
June has the shortest days of the year in Brazzaville, Congo, with an average of 11h and 54min of daylight.
June, October and November, with an average of 7h of sunshine, are months with the least sunshine.
July is the month with the least rainfall in Brazzaville, Congo. Rain falls for 2.9 days and accumulates 2mm (0.08") of precipitation.
Brazzaville, Congo, witnesses the warmest weather in August, with temperatures averaging a high of 33.1°C (91.6°F) and a low of 21.9°C (71.4°F).
With an average relative humidity of 55%, August is the least humid month in Brazzaville.
The month with the most sunshine in Brazzaville is August, with an average of 9.5h of sunshine.
In Brazzaville, November is the month with the lowest recorded average temperatures, measuring a high of 29.5°C (85.1°F) and a low of 21.7°C (71.1°F).
November is the month with the most rainfall in Brazzaville, Congo. Rain falls for 27.4 days and accumulates 173mm (6.81") of precipitation.
With an average relative humidity of 83%, December is the most humid month in Brazzaville.
December has the longest days of the year in Brazzaville, with an average of 12h and 24min of daylight.
Brazzaville, Congo, does not utilize Daylight Saving Time (DST). WAT timezone is used over the entire year.
Average temperature
Brazzaville, Congo
The warmest month (with the highest average high temperature) is August (33.1°C).
The month with the lowest average high temperature is November (29.5°C).
The month with the highest average low temperature is September (22.9°C).
The coldest months (with the lowest average low temperature) are June and July (20.8°C).
Average pressure
Brazzaville, Congo
- Average pressure in January:
1011.1mbar - Average pressure in February:
1010.3mbar - Average pressure in March:
1010.4mbar - Average pressure in April:
1010.7mbar - Average pressure in May:
1011.6mbar - Average pressure in June:
1013.1mbar
- Average pressure in July:
1012.9mbar - Average pressure in August:
1012.4mbar - Average pressure in September:
1011.9mbar - Average pressure in October:
1010.9mbar - Average pressure in November:
1010.7mbar - Average pressure in December:
1011.1mbar
The month with the highest atmospheric pressure is June (1013.1mbar).
The month with the lowest atmospheric pressure is February (1010.3mbar).
Average wind speed
Brazzaville, Congo
- Average wind speed in January:
5.3km/h - Average wind speed in February:
5.6km/h - Average wind speed in March:
5.3km/h - Average wind speed in April:
4.7km/h - Average wind speed in May:
4.8km/h - Average wind speed in June:
6.3km/h
- Average wind speed in July:
7.5km/h - Average wind speed in August:
8.6km/h - Average wind speed in September:
7.7km/h - Average wind speed in October:
6.6km/h - Average wind speed in November:
5.1km/h - Average wind speed in December:
4.7km/h
The windiest month (with the highest average wind speed) is August (8.6km/h).
The calmest months (with the lowest average wind speed) are April and December (4.7km/h).
Average humidity
Brazzaville, Congo
The month with the highest relative humidity is December (83%).
The month with the lowest relative humidity is August (55%).
Average rainfall
Brazzaville, Congo
- Average rainfall in January:
110mm - Average rainfall in February:
121mm - Average rainfall in March:
115mm - Average rainfall in April:
123mm - Average rainfall in May:
101mm - Average rainfall in June:
11mm
The wettest month (with the highest rainfall) is November (173mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days
Brazzaville, Congo
- Average rainfall days in January:
27.3 days - Average rainfall days in February:
24.6 days - Average rainfall days in March:
27.3 days - Average rainfall days in April:
25.7 days - Average rainfall days in May:
23.6 days - Average rainfall days in June:
7.1 days
- Average rainfall days in July:
2.9 days - Average rainfall days in August:
5.8 days - Average rainfall days in September:
17.1 days - Average rainfall days in October:
25.3 days - Average rainfall days in November:
27.4 days - Average rainfall days in December:
29 days
The month with the highest number of rainy days is December (29 days).
The month with the least rainy days is July (2.9 days).
Average daylight / Average sunshine
Brazzaville, Congo
- Average daylight in January:
12h and 18min - Average daylight in February:
12h and 12min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 0min - Average daylight in May:
11h and 54min - Average daylight in June:
11h and 54min
- Average daylight in July:
11h and 54min - Average daylight in August:
12h and 0min - Average daylight in September:
12h and 6min - Average daylight in October:
12h and 12min - Average daylight in November:
12h and 18min - Average daylight in December:
12h and 24min
The month with the longest days is December (Average daylight: 12h and 24min).
The month with the shortest days is June (Average daylight: 11h and 54min).
- Average sunshine in January:
9h and 24min - Average sunshine in February:
8h and 42min - Average sunshine in March:
8h and 30min - Average sunshine in April:
8h and 24min - Average sunshine in May:
8h and 18min - Average sunshine in June:
7h and 0min
- Average sunshine in July:
9h and 6min - Average sunshine in August:
9h and 30min - Average sunshine in September:
8h and 42min - Average sunshine in October:
7h and 0min - Average sunshine in November:
7h and 0min - Average sunshine in December:
9h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The months with the least sunshine are June, October and November (Average sunshine: 7h and 0min).
Average sunshine days
Brazzaville, Congo
- Average sunshine days in January:
2.6 days - Average sunshine days in February:
2.3 days - Average sunshine days in March:
2.6 days - Average sunshine days in April:
3.5 days - Average sunshine days in May:
5.4 days - Average sunshine days in June:
20.1 days
- Average sunshine days in July:
27.4 days - Average sunshine days in August:
23.4 days - Average sunshine days in September:
10.6 days - Average sunshine days in October:
4 days - Average sunshine days in November:
1.9 days - Average sunshine days in December:
1.3 days
The month with the most sunshine days is July (27.4 days).
The month with the least sunshine days is December (1.3 days).
Average UV index
Brazzaville, Congo
The months with the highest UV index are January, March, April, May, July, August and September (UV index 7).
The months with the lowest UV index are February, June, October, November and December (UV index 6).
Average cloud cover
Brazzaville, Congo
The month with the most cloud cover is November (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 19).
Average visibility
Brazzaville, Congo
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, March, April, November and December (8km).
