Sliema climate — normals and trends
Sliema (Malta) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 19.0 °C and it receives 401 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 (25.9 °C on average) and the coldest is February (13.5 °C). Rainfall peaks in December.
Sliema averages 0 frost days, 0 hot days (≥ 30 °C) and 63 rainy days per year.
Sliema has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.0 °C (on 25 July 2023) and the coldest 5.3 °C (on 3 February 1956).
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
SliemaTas-Sliema
- coords
- 35.91°, 14.50°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
19.0°C
Average daily high
19.7°C
Average daily low
18.3°C
Annual rainfall
401mm
Sunshine / day
10.9h
Mean relative humidity
76%
Average peak wind
28.9km/h
Seasonal range
12.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
63 d/yr
Annual snowfall
0.0 cm
Average feels-like high
19.8 °C
Average feels-like low
16.4 °C
Average peak gust
39.2 km/h
Tropical nights (≥ 20 °C)
143 d/yr
Solar radiation
18.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °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
32.0 °C
25 July 2023
Coldest day
5.3 °C
3 February 1956
Wettest day
92 mm
27 September 1983
Windiest day
83.9 km/h
8 December 1988
Strongest gust
124.2 km/h
8 December 1988
Hottest feels-like
38.7 °C
24 July 2023
Coldest feels-like
-4.3 °C
19 January 1940
Sunniest day
14.0 h
20 May 1940
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 16.6 °C | +2.0 °C | 41 mm | -21 mm |
| Feb | 15.5 °C | +1.2 °C | 70 mm | +26 mm |
| Mar | 16.7 °C | +1.9 °C | 43 mm | +12 mm |
| Apr | 17.2 °C | +1.0 °C | 5 mm | -11 mm |
| May | 20.4 °C | +1.4 °C | 29 mm | +22 mm |
| Jun | 25.6 °C | +2.9 °C | 0 mm | -2 mm |
| Jul | 27.5 °C | +1.8 °C | 0 mm | -1 mm |
| Aug | 26.9 °C | +0.3 °C | 1 mm | -2 mm |
| Sep | 26.4 °C | +1.4 °C | 63 mm | +33 mm |
| Oct | 23.0 °C | +0.6 °C | 38 mm | -25 mm |
| Nov | 20.3 °C | +1.0 °C | 42 mm | -25 mm |
| Dec | 17.5 °C | +1.3 °C | 103 mm | +28 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 Sliema?
Sliema has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 19.0 °C and it receives 401 mm of precipitation per year.
What is the hottest day ever recorded in Sliema?
The hottest day measured in Sliema between 1940 and 2025 was 25 July 2023, reaching 32.0 °C.
What is the coldest day in Sliema?
The coldest day measured in Sliema between 1940 and 2025 was 3 February 1956, at 5.3 °C.
Does it snow in Sliema?
Almost never: Sliema sees virtually no snow, with about 0 frost days per year.
Has the climate of Sliema warmed?
Yes: Sliema warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sliema?
The wettest day measured in Sliema between 1940 and 2025 was 27 September 1983, with 92 mm of rain in 24 hours.
What was the windiest day in Sliema?
The windiest day measured in Sliema between 1940 and 2025 was 8 December 1988, with winds reaching 83.9 km/h.
What is the warmest month in Sliema?
The warmest month in Sliema is August (25.9 °C on average); the coldest is February (13.5 °C).
How much does it rain in Sliema?
Sliema receives on average 401 mm of precipitation per year, spread over about 63 rainy days.
Is it sunny in Sliema?
Sliema gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
Are there tropical nights in Sliema?
Yes: Sliema has on average 143 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sliema?
In Sliema, between 1940 and 2025, the highest apparent temperature reached 38.7 °C on 24 July 2023, and the lowest was -4.3 °C on 19 January 1940.
Compare Sliema with another city
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Nearby cities
The climate around Sliema