Biu climate — normals and trends
Biu (Nigeria) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 26.5 °C and it receives 680 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 April (31.1 °C on average) and the coldest is January (23.8 °C). Rainfall peaks in August.
Biu averages 0 frost days, 268 hot days (≥ 30 °C) and 114 rainy days per year.
Biu has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The hottest day of the period reached 43.6 °C (on 29 March 2024) and the coldest 9.5 °C (on 8 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
BiuBorno State
- coords
- 10.61°, 12.19°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.5°C
Average daily high
32.7°C
Average daily low
21.2°C
Annual rainfall
680mm
Sunshine / day
10.8h
Mean relative humidity
48%
Average peak wind
16.0km/h
Seasonal range
7.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
268 d/yr
Rainy days (≥ 1 mm)
114 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.0 °C
Average feels-like low
20.7 °C
Average peak gust
35.2 km/h
Tropical nights (≥ 20 °C)
258 d/yr
Solar radiation
21.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.33 · 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
43.6 °C
29 March 2024
Coldest day
9.5 °C
8 January 1957
Wettest day
128 mm
23 September 1948
Windiest day
31.8 km/h
11 February 2015
Strongest gust
64.4 km/h
11 February 2015
Hottest feels-like
45.3 °C
7 April 2022
Coldest feels-like
4.4 °C
7 January 1993
Sunniest day
12.2 h
6 July 2021
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 | 33.5 °C | +1.7 °C | 0 mm | 0 mm |
| Feb | 35.9 °C | +1.5 °C | 0 mm | -0 mm |
| Mar | 40.0 °C | +2.6 °C | 0 mm | -2 mm |
| Apr | 39.3 °C | +1.4 °C | 7 mm | -10 mm |
| May | 36.9 °C | +1.5 °C | 20 mm | -39 mm |
| Jun | 33.7 °C | +1.4 °C | 41 mm | -43 mm |
| Jul | 29.0 °C | 0.0 °C | 185 mm | +46 mm |
| Aug | 27.7 °C | 0.0 °C | 254 mm | +63 mm |
| Sep | 29.3 °C | +0.3 °C | 133 mm | +3 mm |
| Oct | 32.6 °C | +0.6 °C | 12 mm | -44 mm |
| Nov | 34.9 °C | +1.6 °C | 0 mm | -2 mm |
| Dec | 34.8 °C | +3.0 °C | 0 mm | 0 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 Biu?
Biu has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 26.5 °C and it receives 680 mm of precipitation per year.
What is the hottest day ever recorded in Biu?
The hottest day measured in Biu between 1940 and 2025 was 29 March 2024, reaching 43.6 °C.
What is the coldest day in Biu?
The coldest day measured in Biu between 1940 and 2025 was 8 January 1957, at 9.5 °C.
Does it snow in Biu?
Almost never: Biu sees virtually no snow, with about 0 frost days per year.
Has the climate of Biu warmed?
Yes: Biu warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Biu?
The wettest day measured in Biu between 1940 and 2025 was 23 September 1948, with 128 mm of rain in 24 hours.
What was the windiest day in Biu?
The windiest day measured in Biu between 1940 and 2025 was 11 February 2015, with winds reaching 31.8 km/h.
What is the warmest month in Biu?
The warmest month in Biu is April (31.1 °C on average); the coldest is January (23.8 °C).
How much does it rain in Biu?
Biu receives on average 680 mm of precipitation per year, spread over about 114 rainy days.
Is it sunny in Biu?
Biu gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.
Are there tropical nights in Biu?
Yes: Biu has on average 258 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Biu?
In Biu, between 1940 and 2025, the highest apparent temperature reached 45.3 °C on 7 April 2022, and the lowest was 4.4 °C on 7 January 1993.
Compare Biu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Biu