Njala climate — normals and trends
Njala (Sierra Leone) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 25.8 °C and it receives 2,391 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is March (28.0 °C on average) and the coldest is August (24.0 °C). Rainfall peaks in August.
Njala averages 0 frost days, 205 hot days (≥ 30 °C) and 238 rainy days per year.
Njala has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.0 °C (on 21 February 2016) and the coldest 14.9 °C (on 9 January 1957).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
NjalaSouthern Province
- coords
- 8.23°, -12.02°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.8°C
Average daily high
30.7°C
Average daily low
22.6°C
Annual rainfall
2,391mm
Sunshine / day
8.9h
Mean relative humidity
83%
Average peak wind
10.5km/h
Seasonal range
4.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
205 d/yr
Rainy days (≥ 1 mm)
238 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.8 °C
Average feels-like low
26.9 °C
Average peak gust
25.5 km/h
Tropical nights (≥ 20 °C)
359 d/yr
Solar radiation
16.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.73 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
41.0 °C
21 February 2016
Coldest day
14.9 °C
9 January 1957
Wettest day
268 mm
10 August 2007
Windiest day
21.8 km/h
21 February 1943
Strongest gust
55.4 km/h
27 August 2017
Hottest feels-like
47.5 °C
27 April 2024
Coldest feels-like
13.9 °C
6 January 1989
Sunniest day
12.1 h
2 June 1956
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 36.3 °C | +3.3 °C | 4 mm | -12 mm |
| Feb | 38.0 °C | +3.4 °C | 1 mm | -18 mm |
| Mar | 37.6 °C | +3.0 °C | 23 mm | -26 mm |
| Apr | 35.2 °C | +2.3 °C | 83 mm | -27 mm |
| May | 31.9 °C | +1.1 °C | 177 mm | -65 mm |
| Jun | 30.4 °C | +1.1 °C | 215 mm | -95 mm |
| Jul | 28.1 °C | +0.2 °C | 473 mm | +79 mm |
| Aug | 27.6 °C | +0.2 °C | 609 mm | +146 mm |
| Sep | 28.3 °C | 0.0 °C | 722 mm | +315 mm |
| Oct | 30.1 °C | +0.8 °C | 227 mm | -25 mm |
| Nov | 30.3 °C | +0.5 °C | 121 mm | +18 mm |
| Dec | 30.8 °C | -0.1 °C | 38 mm | +10 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Njala?
Njala has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 25.8 °C and it receives 2,391 mm of precipitation per year.
What is the hottest day ever recorded in Njala?
The hottest day measured in Njala between 1940 and 2025 was 21 February 2016, reaching 41.0 °C.
What is the coldest day in Njala?
The coldest day measured in Njala between 1940 and 2025 was 9 January 1957, at 14.9 °C.
Does it snow in Njala?
Almost never: Njala sees virtually no snow, with about 0 frost days per year.
Has the climate of Njala warmed?
Yes: Njala warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Njala?
The wettest day measured in Njala between 1940 and 2025 was 10 August 2007, with 268 mm of rain in 24 hours.
What was the windiest day in Njala?
The windiest day measured in Njala between 1940 and 2025 was 21 February 1943, with winds reaching 21.8 km/h.
What is the warmest month in Njala?
The warmest month in Njala is March (28.0 °C on average); the coldest is August (24.0 °C).
How much does it rain in Njala?
Njala receives on average 2,391 mm of precipitation per year, spread over about 238 rainy days.
Is it sunny in Njala?
Njala gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.
Are there tropical nights in Njala?
Yes: Njala has on average 359 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Njala?
In Njala, between 1940 and 2025, the highest apparent temperature reached 47.5 °C on 27 April 2024, and the lowest was 13.9 °C on 6 January 1989.
Compare Njala with another city
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Nearby cities
The climate around Njala