Bonny climate — normals and trends
Bonny (Nigeria) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.1 °C and it receives 2,854 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 (27.2 °C on average) and the coldest is August (24.8 °C). Rainfall peaks in June.
Bonny averages 0 frost days, 26 hot days (≥ 30 °C) and 312 rainy days per year.
Bonny has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.7 °C (on 29 January 2016) and the coldest 20.9 °C (on 29 August 1950).
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
BonnyRivers State
- coords
- 4.45°, 7.17°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.1°C
Average daily high
27.9°C
Average daily low
24.7°C
Annual rainfall
2,854mm
Sunshine / day
8.7h
Mean relative humidity
85%
Average peak wind
15.3km/h
Seasonal range
2.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
26 d/yr
Rainy days (≥ 1 mm)
312 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.0 °C
Average feels-like low
28.9 °C
Average peak gust
27.2 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
15.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.76 · 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
32.7 °C
29 January 2016
Coldest day
20.9 °C
29 August 1950
Wettest day
242 mm
10 August 2009
Windiest day
33.8 km/h
16 July 1950
Strongest gust
53.3 km/h
17 July 1950
Hottest feels-like
40.4 °C
7 April 2024
Coldest feels-like
17.6 °C
8 January 1957
Sunniest day
12.0 h
18 May 2017
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 | 30.3 °C | +1.4 °C | 58 mm | -8 mm |
| Feb | 30.4 °C | +1.2 °C | 84 mm | -7 mm |
| Mar | 30.3 °C | +1.2 °C | 172 mm | -14 mm |
| Apr | 30.0 °C | +1.0 °C | 196 mm | -45 mm |
| May | 29.7 °C | +1.3 °C | 273 mm | -29 mm |
| Jun | 28.4 °C | +1.2 °C | 447 mm | +41 mm |
| Jul | 26.5 °C | +0.2 °C | 752 mm | +368 mm |
| Aug | 26.4 °C | +0.2 °C | 196 mm | -77 mm |
| Sep | 27.0 °C | +0.4 °C | 645 mm | +324 mm |
| Oct | 27.6 °C | +0.4 °C | 530 mm | +215 mm |
| Nov | 28.6 °C | +0.6 °C | 170 mm | -17 mm |
| Dec | 29.2 °C | +0.6 °C | 99 mm | +17 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 Bonny?
Bonny has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.1 °C and it receives 2,854 mm of precipitation per year.
What is the hottest day ever recorded in Bonny?
The hottest day measured in Bonny between 1940 and 2025 was 29 January 2016, reaching 32.7 °C.
What is the coldest day in Bonny?
The coldest day measured in Bonny between 1940 and 2025 was 29 August 1950, at 20.9 °C.
Does it snow in Bonny?
Almost never: Bonny sees virtually no snow, with about 0 frost days per year.
Has the climate of Bonny warmed?
Yes: Bonny warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bonny?
The wettest day measured in Bonny between 1940 and 2025 was 10 August 2009, with 242 mm of rain in 24 hours.
What was the windiest day in Bonny?
The windiest day measured in Bonny between 1940 and 2025 was 16 July 1950, with winds reaching 33.8 km/h.
What is the warmest month in Bonny?
The warmest month in Bonny is March (27.2 °C on average); the coldest is August (24.8 °C).
How much does it rain in Bonny?
Bonny receives on average 2,854 mm of precipitation per year, spread over about 312 rainy days.
Is it sunny in Bonny?
Bonny gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
Are there tropical nights in Bonny?
Yes: Bonny has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bonny?
In Bonny, between 1940 and 2025, the highest apparent temperature reached 40.4 °C on 7 April 2024, and the lowest was 17.6 °C on 8 January 1957.
Compare Bonny with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bonny