Siliana climate — normals and trends
Siliana (Tunisia) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 15.8 °C and it receives 431 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 July (25.5 °C on average) and the coldest is January (7.5 °C). Rainfall peaks in March.
Siliana averages 7 frost days, 68 hot days (≥ 30 °C) and 83 rainy days per year.
Siliana has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.
The number of frost days there went from about 14 to 0 per year over the period.
The hottest day of the period reached 43.6 °C (on 10 August 2021) and the coldest -9.9 °C (on 31 December 1940).
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
SilianaSiliana Governorate
- coords
- 36.08°, 9.37°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.8°C
Average daily high
21.3°C
Average daily low
10.8°C
Annual rainfall
431mm
Sunshine / day
10.4h
Mean relative humidity
65%
Average peak wind
15.8km/h
Seasonal range
18.0°C
Frost days (< 0 °C)
7 d/yr
Hot days (≥ 30 °C)
68 d/yr
Rainy days (≥ 1 mm)
83 d/yr
Annual snowfall
4.5 cm
Average feels-like high
20.0 °C
Average feels-like low
9.1 °C
Average peak gust
37.1 km/h
Tropical nights (≥ 20 °C)
29 d/yr
Solar radiation
17.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.68 · 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
10 August 2021
Coldest day
-9.9 °C
31 December 1940
Wettest day
80 mm
12 December 2003
Windiest day
45.7 km/h
8 January 1968
Strongest gust
112.3 km/h
9 February 1984
Hottest feels-like
44.6 °C
8 July 2023
Coldest feels-like
-14.9 °C
31 December 1940
Snowiest day
9.8 cm
31 December 2014
Sunniest day
13.8 h
18 June 1947
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 | 14.3 °C | +2.5 °C | 64 mm | +22 mm |
| Feb | 14.4 °C | +1.5 °C | 44 mm | +2 mm |
| Mar | 17.9 °C | +2.4 °C | 34 mm | -20 mm |
| Apr | 20.3 °C | +1.6 °C | 77 mm | +26 mm |
| May | 23.8 °C | +0.3 °C | 88 mm | +50 mm |
| Jun | 31.7 °C | +3.1 °C | 2 mm | -19 mm |
| Jul | 33.7 °C | +1.5 °C | 4 mm | -4 mm |
| Aug | 32.7 °C | +0.7 °C | 15 mm | -4 mm |
| Sep | 29.3 °C | +1.7 °C | 55 mm | +13 mm |
| Oct | 23.6 °C | +1.2 °C | 26 mm | -16 mm |
| Nov | 18.3 °C | +1.2 °C | 7 mm | -26 mm |
| Dec | 14.5 °C | +1.6 °C | 26 mm | -13 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 Siliana?
Siliana has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 15.8 °C and it receives 431 mm of precipitation per year.
What is the hottest day ever recorded in Siliana?
The hottest day measured in Siliana between 1940 and 2025 was 10 August 2021, reaching 43.6 °C.
What is the coldest day in Siliana?
The coldest day measured in Siliana between 1940 and 2025 was 31 December 1940, at -9.9 °C.
Does it snow in Siliana?
Yes. Siliana gets on average 4.5 cm of snow per year and has around 7 frost days.
Has the climate of Siliana warmed?
Yes: Siliana warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Siliana?
The wettest day measured in Siliana between 1940 and 2025 was 12 December 2003, with 80 mm of rain in 24 hours.
What was the windiest day in Siliana?
The windiest day measured in Siliana between 1940 and 2025 was 8 January 1968, with winds reaching 45.7 km/h.
What is the warmest month in Siliana?
The warmest month in Siliana is July (25.5 °C on average); the coldest is January (7.5 °C).
How much does it rain in Siliana?
Siliana receives on average 431 mm of precipitation per year, spread over about 83 rainy days.
Is it sunny in Siliana?
Siliana gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
What is the biggest single-day snowfall in Siliana?
The heaviest 24-hour snowfall measured in Siliana between 1940 and 2025 was 31 December 2014, with 9.8 cm.
Are there tropical nights in Siliana?
Yes: Siliana has on average 29 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Siliana?
In Siliana, between 1940 and 2025, the highest apparent temperature reached 44.6 °C on 8 July 2023, and the lowest was -14.9 °C on 31 December 1940.
Compare Siliana with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Siliana