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Siliana, Tunisia climate
BSk Cold semi-arid
Siliana has a seasonal mild-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is August with an average daily high near 36°C, while the coldest is January averaging around 5°C at night. Around 432 mm of precipitation falls each year, peaking in January (58 mm) and easing off in August (20 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Siliana climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 14 | 15 | 18 | 22 | 27 | 33 | 36 | 36 | 30 | 26 | 20 | 16 |
| Avg temp (°C) | 10 | 10 | 12 | 15 | 19 | 25 | 28 | 28 | 24 | 20 | 14 | 11 |
| Avg low (°C) | 5 | 4 | 6 | 9 | 12 | 16 | 19 | 20 | 17 | 14 | 9 | 6 |
| Precipitation (mm) | 58 | 34 | 47 | 51 | 31 | 25 | — | 20 | 54 | 37 | 36 | 39 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 14 | 15 | 18 | 22 | 27 | 33 |
| Avg temp (°C) | 10 | 10 | 12 | 15 | 19 | 25 |
| Avg low (°C) | 5 | 4 | 6 | 9 | 12 | 16 |
| Precipitation (mm) | 58 | 34 | 47 | 51 | 31 | 25 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 36 | 36 | 30 | 26 | 20 | 16 |
| Avg temp (°C) | 28 | 28 | 24 | 20 | 14 | 11 |
| Avg low (°C) | 19 | 20 | 17 | 14 | 9 | 6 |
| Precipitation (mm) | — | 20 | 54 | 37 | 36 | 39 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 59 | 57 | 58 | 49 | 34 | 20 | 26 | 47 | 50 | 56 | 59 |
| Relative humidity (%) | 79 | 76 | 71 | 67 | 61 | 55 | 48 | 50 | 64 | 69 | 75 | 79 |
| Wind speed (km/h) | 11.6 | 12.0 | 11.7 | 11.4 | 10.8 | 9.9 | 9.8 | 9.0 | 9.5 | 9.6 | 11.1 | 11.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 59 | 57 | 58 | 49 | 34 |
| Relative humidity (%) | 79 | 76 | 71 | 67 | 61 | 55 |
| Wind speed (km/h) | 11.6 | 12.0 | 11.7 | 11.4 | 10.8 | 9.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 20 | 26 | 47 | 50 | 56 | 59 |
| Relative humidity (%) | 48 | 50 | 64 | 69 | 75 | 79 |
| Wind speed (km/h) | 9.8 | 9.0 | 9.5 | 9.6 | 11.1 | 11.9 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Siliana, a weather station, about 2 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.