Climate Insights for Bomi

, Southern Province, Sierra Leone

Hottest
February
34°C peak
Coldest
January
22°C low
Wettest
September
596mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Bomi is hot. The average annual temperature is 26°C and approximately 3539mm of precipitation falls per year. Bomi receives a notable amount of rainfall throughout the year, including during its driest month. Bomi sits near the equator, so seasonal temperature differences are minimal throughout the year.

Temperature

10° 20° 30° 40° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 33° Average: 26° Min: 22° Feb Max: 34° Average: 27° Min: 23° Mar Max: 33° Average: 28° Min: 24° Apr Max: 32° Average: 27° Min: 24° May Max: 30° Average: 26° Min: 24° Jun Max: 29° Average: 25° Min: 23° Jul Max: 28° Average: 25° Min: 23° Aug Max: 28° Average: 24° Min: 23° Sep Max: 28° Average: 25° Min: 23° Oct Max: 30° Average: 26° Min: 23° Nov Max: 30° Average: 26° Min: 23° Dec Max: 31° Average: 26° Min: 22°
Max
Average
Min

Bomi sees moderate temperature variation throughout the year, ranging from 22°C to 34°C. The warmest month is February, when average highs reach 34°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 22°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm 400mm 450mm 500mm 550mm 600mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 42mm Feb Precipitation: 43mm Mar Precipitation: 123mm Apr Precipitation: 226mm May Precipitation: 333mm Jun Precipitation: 437mm Jul Precipitation: 570mm Aug Precipitation: 582mm Sep Precipitation: 596mm Oct Precipitation: 339mm Nov Precipitation: 169mm Dec Precipitation: 77mm
Precipitation

Bomi is a very wet location, receiving approximately 3539mm of precipitation annually, which averages out to around 295mm per month. The wettest month is September, averaging 596mm of rainfall. August and July also tend to see above-average precipitation. The driest month is January, with just 42mm. That's 554mm less than September, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Wind

0km/h 5km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 2km/h Feb Wind Speed: 2km/h Mar Wind Speed: 2km/h Apr Wind Speed: 1km/h May Wind Speed: 1km/h Jun Wind Speed: 1km/h Jul Wind Speed: 2km/h Aug Wind Speed: 2km/h Sep Wind Speed: 1km/h Oct Wind Speed: 1km/h Nov Wind Speed: 1km/h Dec Wind Speed: 1km/h
Wind Speed

Bomi is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

92 days until Autumn

It is currently summer in Bomi, which began on June 21, 2026. Bomi sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in February at around 34°C, while the coldest stretch bottoms out in January near 22°C. Autumn is next, beginning on September 23, 2026 — 92 days from now.

Spring

Temperatures range from 24 to 33°C. Rainfall is heavy, totalling around 683mm across the season with a monthly average of 228mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 23 to 29°C. Rainfall is heavy, totalling around 1589mm across the season with a monthly average of 530mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 23 to 30°C. Rainfall is heavy, totalling around 1104mm across the season with a monthly average of 368mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 22 to 34°C. Precipitation is moderate at around 163mm for the season, averaging 54mm per month. Winds are generally light, averaging 1km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Monthly Climate Data

The table below shows monthly climate averages for Bomi based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
22 °C
33 °C
2 km/h
42 mm
0 cm
Feb
23 °C
34 °C
2 km/h
43 mm
0 cm
Mar
24 °C
33 °C
2 km/h
123 mm
0 cm
Apr
24 °C
32 °C
1 km/h
226 mm
0 cm
May
24 °C
30 °C
1 km/h
333 mm
0 cm
Jun Current
23 °C
29 °C
1 km/h
437 mm
0 cm
Jul
23 °C
28 °C
2 km/h
570 mm
0 cm
Aug
23 °C
28 °C
2 km/h
582 mm
0 cm
Sep
23 °C
28 °C
1 km/h
596 mm
0 cm
Oct
23 °C
30 °C
1 km/h
339 mm
0 cm
Nov
23 °C
30 °C
1 km/h
169 mm
0 cm
Dec
22 °C
31 °C
1 km/h
77 mm
0 cm
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