Mile 91 climate — normals and trends
Mile 91 (Sierra Leone) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 26.0 °C and it receives 2,384 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 (28.3 °C on average) and the coldest is August (24.1 °C). Rainfall peaks in August.
Mile 91 averages 0 frost days, 213 hot days (≥ 30 °C) and 230 rainy days per year.
Mile 91 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 40.5 °C (on 21 February 2016) and the coldest 15.5 °C (on 12 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
Mile 91Northern Province
- coords
- 8.47°, -12.21°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.0°C
Average daily high
30.9°C
Average daily low
22.7°C
Annual rainfall
2,384mm
Sunshine / day
9.1h
Mean relative humidity
82%
Average peak wind
10.8km/h
Seasonal range
4.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
213 d/yr
Rainy days (≥ 1 mm)
230 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.8 °C
Average feels-like low
27.0 °C
Average peak gust
26.4 km/h
Tropical nights (≥ 20 °C)
359 d/yr
Solar radiation
16.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.74 · 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
40.5 °C
21 February 2016
Coldest day
15.5 °C
12 January 1957
Wettest day
245 mm
10 August 2007
Windiest day
21.7 km/h
26 July 1980
Strongest gust
52.6 km/h
27 August 2017
Hottest feels-like
47.2 °C
27 April 2024
Coldest feels-like
14.4 °C
6 January 1989
Sunniest day
12.1 h
2 June 1956
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 35.8 °C | +2.6 °C | 2 mm | -11 mm |
| Feb | 37.7 °C | +2.9 °C | 0 mm | -14 mm |
| Mar | 37.6 °C | +2.6 °C | 13 mm | -24 mm |
| Apr | 35.2 °C | +1.8 °C | 88 mm | -2 mm |
| May | 31.9 °C | +1.0 °C | 174 mm | -55 mm |
| Jun | 30.5 °C | +1.1 °C | 263 mm | -48 mm |
| Jul | 28.1 °C | +0.2 °C | 611 mm | +189 mm |
| Aug | 27.6 °C | +0.2 °C | 627 mm | +143 mm |
| Sep | 28.3 °C | 0.0 °C | 793 mm | +385 mm |
| Oct | 30.3 °C | +0.9 °C | 250 mm | -0 mm |
| Nov | 30.4 °C | +0.3 °C | 133 mm | +32 mm |
| Dec | 31.2 °C | 0.0 °C | 27 mm | +1 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 Mile 91?
Mile 91 has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.0 °C and it receives 2,384 mm of precipitation per year.
What is the hottest day ever recorded in Mile 91?
The hottest day measured in Mile 91 between 1940 and 2025 was 21 February 2016, reaching 40.5 °C.
What is the coldest day in Mile 91?
The coldest day measured in Mile 91 between 1940 and 2025 was 12 January 1957, at 15.5 °C.
Does it snow in Mile 91?
Almost never: Mile 91 sees virtually no snow, with about 0 frost days per year.
Has the climate of Mile 91 warmed?
Yes: Mile 91 warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mile 91?
The wettest day measured in Mile 91 between 1940 and 2025 was 10 August 2007, with 245 mm of rain in 24 hours.
What was the windiest day in Mile 91?
The windiest day measured in Mile 91 between 1940 and 2025 was 26 July 1980, with winds reaching 21.7 km/h.
What is the warmest month in Mile 91?
The warmest month in Mile 91 is March (28.3 °C on average); the coldest is August (24.1 °C).
How much does it rain in Mile 91?
Mile 91 receives on average 2,384 mm of precipitation per year, spread over about 230 rainy days.
Is it sunny in Mile 91?
Mile 91 gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
Are there tropical nights in Mile 91?
Yes: Mile 91 has on average 359 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Mile 91?
In Mile 91, between 1940 and 2025, the highest apparent temperature reached 47.2 °C on 27 April 2024, and the lowest was 14.4 °C on 6 January 1989.
Compare Mile 91 with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Mile 91