Owerri climate — normals and trends
Owerri (Nigeria) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 25.7 °C and it receives 2,256 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 February (27.4 °C on average) and the coldest is July (24.2 °C). Rainfall peaks in September.
Owerri averages 0 frost days, 235 hot days (≥ 30 °C) and 260 rainy days per year.
Owerri has warmed by +1.8 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.3 °C (on 24 February 2017) and the coldest 13.3 °C (on 2 January 1967).
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
OwerriImo State
- coords
- 5.48°, 7.03°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.7°C
Average daily high
31.1°C
Average daily low
22.3°C
Annual rainfall
2,256mm
Sunshine / day
8.2h
Mean relative humidity
84%
Average peak wind
9.7km/h
Seasonal range
3.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
235 d/yr
Rainy days (≥ 1 mm)
260 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.3 °C
Average feels-like low
26.5 °C
Average peak gust
24.8 km/h
Tropical nights (≥ 20 °C)
356 d/yr
Solar radiation
15.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.78 · 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
41.3 °C
24 February 2017
Coldest day
13.3 °C
2 January 1967
Wettest day
181 mm
16 September 2025
Windiest day
19.7 km/h
12 August 1971
Strongest gust
48.6 km/h
8 August 1950
Hottest feels-like
46.3 °C
13 February 2024
Coldest feels-like
11.0 °C
2 January 1967
Sunniest day
11.9 h
22 July 1996
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 | 35.6 °C | +2.1 °C | 15 mm | -17 mm |
| Feb | 36.4 °C | +2.2 °C | 44 mm | -17 mm |
| Mar | 35.1 °C | +2.0 °C | 86 mm | -58 mm |
| Apr | 33.5 °C | +1.5 °C | 177 mm | -36 mm |
| May | 32.6 °C | +1.6 °C | 192 mm | -76 mm |
| Jun | 30.9 °C | +1.5 °C | 336 mm | +48 mm |
| Jul | 28.5 °C | 0.0 °C | 336 mm | +61 mm |
| Aug | 28.9 °C | +0.3 °C | 193 mm | -36 mm |
| Sep | 29.0 °C | -0.1 °C | 549 mm | +251 mm |
| Oct | 30.4 °C | +0.6 °C | 329 mm | +34 mm |
| Nov | 32.2 °C | +1.1 °C | 88 mm | -30 mm |
| Dec | 33.8 °C | +1.2 °C | 46 mm | +11 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 Owerri?
Owerri has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 25.7 °C and it receives 2,256 mm of precipitation per year.
What is the hottest day ever recorded in Owerri?
The hottest day measured in Owerri between 1940 and 2025 was 24 February 2017, reaching 41.3 °C.
What is the coldest day in Owerri?
The coldest day measured in Owerri between 1940 and 2025 was 2 January 1967, at 13.3 °C.
Does it snow in Owerri?
Almost never: Owerri sees virtually no snow, with about 0 frost days per year.
Has the climate of Owerri warmed?
Yes: Owerri warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Owerri?
The wettest day measured in Owerri between 1940 and 2025 was 16 September 2025, with 181 mm of rain in 24 hours.
What was the windiest day in Owerri?
The windiest day measured in Owerri between 1940 and 2025 was 12 August 1971, with winds reaching 19.7 km/h.
What is the warmest month in Owerri?
The warmest month in Owerri is February (27.4 °C on average); the coldest is July (24.2 °C).
How much does it rain in Owerri?
Owerri receives on average 2,256 mm of precipitation per year, spread over about 260 rainy days.
Is it sunny in Owerri?
Owerri gets on average 8.2 hours of sunshine per day, roughly 2,993 hours per year over 1940-2025.
Are there tropical nights in Owerri?
Yes: Owerri has on average 356 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Owerri?
In Owerri, between 1940 and 2025, the highest apparent temperature reached 46.3 °C on 13 February 2024, and the lowest was 11.0 °C on 2 January 1967.
Compare Owerri with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Owerri