Er Roseires climate — normals and trends
Er Roseires (Sudan) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 28.3 °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 (32.3 °C on average) and the coldest is August (25.6 °C). Rainfall peaks in August.
Er Roseires averages 0 frost days, 318 hot days (≥ 30 °C) and 114 rainy days per year.
Er Roseires has warmed by +3.5 °C between 1940 and 2025, or +0.41 °C per decade. This trend is statistically significant.
The hottest day of the period reached 44.7 °C (on 3 April 2022) and the coldest 12.4 °C (on 25 December 1971).
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
Er RoseiresBlue Nile
- coords
- 11.87°, 34.39°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
28.3°C
Average daily high
34.8°C
Average daily low
23.1°C
Annual rainfall
680mm
Sunshine / day
10.7h
Mean relative humidity
49%
Average peak wind
14.9km/h
Seasonal range
6.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
318 d/yr
Rainy days (≥ 1 mm)
114 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.5 °C
Average feels-like low
23.6 °C
Average peak gust
31.4 km/h
Tropical nights (≥ 20 °C)
333 d/yr
Solar radiation
21.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.5 °C
since 1940
+0.4 °C per decade · r² = 0.70 · 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
44.7 °C
3 April 2022
Coldest day
12.4 °C
25 December 1971
Wettest day
91 mm
11 April 1950
Windiest day
37.1 km/h
21 March 1969
Strongest gust
65.2 km/h
23 April 1989
Hottest feels-like
45.4 °C
24 May 1998
Coldest feels-like
8.6 °C
25 December 1971
Sunniest day
12.3 h
18 May 2009
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 | 37.2 °C | +2.5 °C | 0 mm | -0 mm |
| Feb | 39.5 °C | +2.9 °C | 0 mm | -0 mm |
| Mar | 40.8 °C | +1.9 °C | 0 mm | -4 mm |
| Apr | 41.0 °C | +1.4 °C | 4 mm | -13 mm |
| May | 39.9 °C | +2.8 °C | 7 mm | -69 mm |
| Jun | 38.3 °C | +3.8 °C | 6 mm | -81 mm |
| Jul | 34.3 °C | +2.7 °C | 58 mm | -65 mm |
| Aug | 31.5 °C | +1.3 °C | 121 mm | -34 mm |
| Sep | 33.9 °C | +2.7 °C | 54 mm | -72 mm |
| Oct | 35.8 °C | +2.9 °C | 32 mm | -43 mm |
| Nov | 38.4 °C | +3.3 °C | 2 mm | -10 mm |
| Dec | 37.1 °C | +2.4 °C | 0 mm | -2 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 Er Roseires?
Er Roseires has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 28.3 °C and it receives 680 mm of precipitation per year.
What is the hottest day ever recorded in Er Roseires?
The hottest day measured in Er Roseires between 1940 and 2025 was 3 April 2022, reaching 44.7 °C.
What is the coldest day in Er Roseires?
The coldest day measured in Er Roseires between 1940 and 2025 was 25 December 1971, at 12.4 °C.
Does it snow in Er Roseires?
Almost never: Er Roseires sees virtually no snow, with about 0 frost days per year.
Has the climate of Er Roseires warmed?
Yes: Er Roseires warmed by +3.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Er Roseires?
The wettest day measured in Er Roseires between 1940 and 2025 was 11 April 1950, with 91 mm of rain in 24 hours.
What was the windiest day in Er Roseires?
The windiest day measured in Er Roseires between 1940 and 2025 was 21 March 1969, with winds reaching 37.1 km/h.
What is the warmest month in Er Roseires?
The warmest month in Er Roseires is April (32.3 °C on average); the coldest is August (25.6 °C).
How much does it rain in Er Roseires?
Er Roseires receives on average 680 mm of precipitation per year, spread over about 114 rainy days.
Is it sunny in Er Roseires?
Er Roseires gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
Are there tropical nights in Er Roseires?
Yes: Er Roseires has on average 333 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Er Roseires?
In Er Roseires, between 1940 and 2025, the highest apparent temperature reached 45.4 °C on 24 May 1998, and the lowest was 8.6 °C on 25 December 1971.
Compare Er Roseires with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Er Roseires