Wa climate — normals and trends
Wa (Ghana) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.1 °C and it receives 1,016 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 (30.6 °C on average) and the coldest is August (24.7 °C). Rainfall peaks in August.
Wa averages 0 frost days, 270 hot days (≥ 30 °C) and 146 rainy days per year.
Wa has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.7 °C (on 26 March 1983) and the coldest 13.4 °C (on 7 December 1963).
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
WaUpper West
- coords
- 10.06°, -2.50°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.1°C
Average daily high
32.5°C
Average daily low
22.4°C
Annual rainfall
1,016mm
Sunshine / day
10.7h
Mean relative humidity
60%
Average peak wind
14.5km/h
Seasonal range
5.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
270 d/yr
Rainy days (≥ 1 mm)
146 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.5 °C
Average feels-like low
23.7 °C
Average peak gust
30.7 km/h
Tropical nights (≥ 20 °C)
318 d/yr
Solar radiation
20.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.61 · 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
41.7 °C
26 March 1983
Coldest day
13.4 °C
7 December 1963
Wettest day
202 mm
20 August 2024
Windiest day
32.1 km/h
30 April 1989
Strongest gust
59.4 km/h
24 January 1992
Hottest feels-like
45.9 °C
11 March 2024
Coldest feels-like
9.3 °C
9 January 1957
Sunniest day
12.3 h
16 July 1960
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 | 34.8 °C | +1.0 °C | 0 mm | -2 mm |
| Feb | 36.4 °C | +0.5 °C | 0 mm | -6 mm |
| Mar | 37.8 °C | +0.9 °C | 13 mm | -19 mm |
| Apr | 36.6 °C | +1.2 °C | 17 mm | -64 mm |
| May | 33.9 °C | +0.7 °C | 45 mm | -62 mm |
| Jun | 31.6 °C | +0.7 °C | 87 mm | -27 mm |
| Jul | 29.1 °C | +0.1 °C | 156 mm | -9 mm |
| Aug | 28.9 °C | +0.7 °C | 210 mm | -2 mm |
| Sep | 29.6 °C | +0.5 °C | 214 mm | +21 mm |
| Oct | 32.8 °C | +1.7 °C | 57 mm | -30 mm |
| Nov | 34.6 °C | +1.2 °C | 11 mm | -4 mm |
| Dec | 34.2 °C | +0.8 °C | 0 mm | -4 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 Wa?
Wa has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.1 °C and it receives 1,016 mm of precipitation per year.
What is the hottest day ever recorded in Wa?
The hottest day measured in Wa between 1940 and 2025 was 26 March 1983, reaching 41.7 °C.
What is the coldest day in Wa?
The coldest day measured in Wa between 1940 and 2025 was 7 December 1963, at 13.4 °C.
Does it snow in Wa?
Almost never: Wa sees virtually no snow, with about 0 frost days per year.
Has the climate of Wa warmed?
Yes: Wa warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Wa?
The wettest day measured in Wa between 1940 and 2025 was 20 August 2024, with 202 mm of rain in 24 hours.
What was the windiest day in Wa?
The windiest day measured in Wa between 1940 and 2025 was 30 April 1989, with winds reaching 32.1 km/h.
What is the warmest month in Wa?
The warmest month in Wa is March (30.6 °C on average); the coldest is August (24.7 °C).
How much does it rain in Wa?
Wa receives on average 1,016 mm of precipitation per year, spread over about 146 rainy days.
Is it sunny in Wa?
Wa gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
Are there tropical nights in Wa?
Yes: Wa has on average 318 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Wa?
In Wa, between 1940 and 2025, the highest apparent temperature reached 45.9 °C on 11 March 2024, and the lowest was 9.3 °C on 9 January 1957.
Compare Wa with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Wa