Rosetta climate — normals and trends
Rosetta (Egypt) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 20.5 °C and it receives 167 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 August (26.4 °C on average) and the coldest is January (14.8 °C). Rainfall peaks in January.
Rosetta averages 0 frost days, 6 hot days (≥ 30 °C) and 33 rainy days per year.
Rosetta has warmed by +1.2 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.6 °C (on 30 May 1961) and the coldest 5.3 °C (on 5 February 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
RosettaBeheira
- coords
- 31.40°, 30.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
20.5°C
Average daily high
22.7°C
Average daily low
18.8°C
Annual rainfall
167mm
Sunshine / day
11.3h
Mean relative humidity
71%
Average peak wind
22.5km/h
Seasonal range
11.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
6 d/yr
Rainy days (≥ 1 mm)
33 d/yr
Annual snowfall
0.0 cm
Average feels-like high
23.0 °C
Average feels-like low
18.3 °C
Average peak gust
36.1 km/h
Tropical nights (≥ 20 °C)
160 d/yr
Solar radiation
19.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.2 °C per decade · r² = 0.42 · 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
37.6 °C
30 May 1961
Coldest day
5.3 °C
5 February 1950
Wettest day
41 mm
12 December 2010
Windiest day
63.8 km/h
3 February 1992
Strongest gust
99.7 km/h
3 February 1992
Hottest feels-like
41.2 °C
29 July 2002
Coldest feels-like
-3.5 °C
5 February 1950
Sunniest day
14.0 h
10 June 1940
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 | 18.9 °C | +2.0 °C | 7 mm | -39 mm |
| Feb | 16.5 °C | -0.6 °C | 6 mm | -20 mm |
| Mar | 20.4 °C | +1.9 °C | 5 mm | -11 mm |
| Apr | 21.0 °C | +0.1 °C | 2 mm | -2 mm |
| May | 24.5 °C | +1.0 °C | 3 mm | +2 mm |
| Jun | 26.2 °C | +0.1 °C | 0 mm | -0 mm |
| Jul | 28.9 °C | +1.1 °C | 0 mm | 0 mm |
| Aug | 29.8 °C | +1.4 °C | 0 mm | -0 mm |
| Sep | 28.0 °C | +0.6 °C | 0 mm | -1 mm |
| Oct | 25.8 °C | +0.5 °C | 3 mm | -6 mm |
| Nov | 24.0 °C | +1.8 °C | 9 mm | -15 mm |
| Dec | 19.9 °C | +1.2 °C | 23 mm | -20 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 Rosetta?
Rosetta has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 20.5 °C and it receives 167 mm of precipitation per year.
What is the hottest day ever recorded in Rosetta?
The hottest day measured in Rosetta between 1940 and 2025 was 30 May 1961, reaching 37.6 °C.
What is the coldest day in Rosetta?
The coldest day measured in Rosetta between 1940 and 2025 was 5 February 1950, at 5.3 °C.
Does it snow in Rosetta?
Almost never: Rosetta sees virtually no snow, with about 0 frost days per year.
Has the climate of Rosetta warmed?
Yes: Rosetta warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Rosetta?
The wettest day measured in Rosetta between 1940 and 2025 was 12 December 2010, with 41 mm of rain in 24 hours.
What was the windiest day in Rosetta?
The windiest day measured in Rosetta between 1940 and 2025 was 3 February 1992, with winds reaching 63.8 km/h.
What is the warmest month in Rosetta?
The warmest month in Rosetta is August (26.4 °C on average); the coldest is January (14.8 °C).
How much does it rain in Rosetta?
Rosetta receives on average 167 mm of precipitation per year, spread over about 33 rainy days.
Is it sunny in Rosetta?
Rosetta gets on average 11.3 hours of sunshine per day, roughly 4,125 hours per year over 1940-2025.
Are there tropical nights in Rosetta?
Yes: Rosetta has on average 160 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rosetta?
In Rosetta, between 1940 and 2025, the highest apparent temperature reached 41.2 °C on 29 July 2002, and the lowest was -3.5 °C on 5 February 1950.
Compare Rosetta with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rosetta