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Djelfa, Algeria climate
BSk Cold semi-arid
Djelfa has a seasonal mild-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is July with an average daily high near 34°C, while the coldest is January averaging around 0°C at night. Around 282 mm of precipitation falls each year, peaking in September (32 mm) and easing off in July (12 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsDjelfa climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 11 | 15 | 19 | 24 | 30 | 34 | 33 | 27 | 22 | 15 | 11 |
| Avg temp (°C) | 5 | 6 | 10 | 13 | 17 | 23 | 27 | 26 | 21 | 16 | 10 | 6 |
| Avg low (°C) | 0 | 1 | 4 | 6 | 11 | 15 | 19 | 19 | 14 | 10 | 5 | 1 |
| Precipitation (mm) | 22 | 24 | 28 | 28 | 29 | 19 | 12 | 15 | 32 | 28 | 20 | 25 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 11 | 15 | 19 | 24 | 30 |
| Avg temp (°C) | 5 | 6 | 10 | 13 | 17 | 23 |
| Avg low (°C) | 0 | 1 | 4 | 6 | 11 | 15 |
| Precipitation (mm) | 22 | 24 | 28 | 28 | 29 | 19 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 34 | 33 | 27 | 22 | 15 | 11 |
| Avg temp (°C) | 27 | 26 | 21 | 16 | 10 | 6 |
| Avg low (°C) | 19 | 19 | 14 | 10 | 5 | 1 |
| Precipitation (mm) | 12 | 15 | 32 | 28 | 20 | 25 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 6 | 5 | 6 | 5 | 5 | 3 | 3 | 3 | 4 | 5 | 5 | 6 |
| Days with high ≥ 32°C (days) | — | — | — | — | 1 | 8 | 20 | 18 | 3 | 0.1 | — | — |
| Days with low ≤ 0°C (days) | 12 | 10 | 4 | 0.8 | — | — | — | — | — | — | 2 | 10 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 6 | 5 | 6 | 5 | 5 | 3 |
| Days with high ≥ 32°C (days) | — | — | — | — | 1 | 8 |
| Days with low ≤ 0°C (days) | 12 | 10 | 4 | 0.8 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 3 | 4 | 5 | 5 | 6 |
| Days with high ≥ 32°C (days) | 20 | 18 | 3 | 0.1 | — | — |
| Days with low ≤ 0°C (days) | — | — | — | — | 2 | 10 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 44 | 43 | 46 | 46 | 44 | 37 | 34 | 39 | 46 | 43 | 42 | 43 |
| Clear days (≤ 30% cloud) | 12 | 11 | 11 | 11 | 12 | 14 | 15 | 14 | 11 | 13 | 12 | 12 |
| Partly cloudy days (30–70%) | 12 | 11 | 12 | 12 | 12 | 11 | 13 | 13 | 12 | 11 | 11 | 12 |
| Cloudy days (≥ 70%) | 7 | 6 | 8 | 7 | 7 | 5 | 3 | 5 | 7 | 7 | 6 | 6 |
| Relative humidity (%) | 72 | 67 | 60 | 54 | 46 | 37 | 29 | 32 | 46 | 55 | 67 | 75 |
| Wind speed (m/s) | 3.5 | 3.6 | 3.7 | 3.8 | 3.5 | 3.3 | 3.1 | 2.9 | 3.0 | 3.0 | 3.4 | 3.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 44 | 43 | 46 | 46 | 44 | 37 |
| Clear days (≤ 30% cloud) | 12 | 11 | 11 | 11 | 12 | 14 |
| Partly cloudy days (30–70%) | 12 | 11 | 12 | 12 | 12 | 11 |
| Cloudy days (≥ 70%) | 7 | 6 | 8 | 7 | 7 | 5 |
| Relative humidity (%) | 72 | 67 | 60 | 54 | 46 | 37 |
| Wind speed (m/s) | 3.5 | 3.6 | 3.7 | 3.8 | 3.5 | 3.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 34 | 39 | 46 | 43 | 42 | 43 |
| Clear days (≤ 30% cloud) | 15 | 14 | 11 | 13 | 12 | 12 |
| Partly cloudy days (30–70%) | 13 | 13 | 12 | 11 | 11 | 12 |
| Cloudy days (≥ 70%) | 3 | 5 | 7 | 7 | 6 | 6 |
| Relative humidity (%) | 29 | 32 | 46 | 55 | 67 | 75 |
| Wind speed (m/s) | 3.1 | 2.9 | 3.0 | 3.0 | 3.4 | 3.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 23 years of daily observations at Djelfa/tletsi, 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.