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Boumerdas, Algeria climate
Csa Hot-summer Mediterranean
Boumerdas has a seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is August with an average daily high near 33°C, while the coldest is December averaging around 6°C at night. Precipitation totals about 621 mm a year and is strongly seasonal — November alone averages 102 mm while July barely receives 2 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 countsBoumerdas climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 17 | 17 | 20 | 22 | 25 | 29 | 32 | 33 | 30 | 26 | 19 | 15 |
| Avg temp (°C) | 11 | 11 | 13 | 15 | 19 | 22 | 26 | 26 | 24 | 20 | 14 | 11 |
| Avg low (°C) | 4 | 5 | 7 | 9 | 12 | 16 | 19 | 20 | 18 | 14 | 9 | 6 |
| Precipitation (mm) | 83 | 80 | 68 | 59 | 46 | 9 | 2 | 10 | 28 | 50 | 102 | 85 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 17 | 17 | 20 | 22 | 25 | 29 |
| Avg temp (°C) | 11 | 11 | 13 | 15 | 19 | 22 |
| Avg low (°C) | 4 | 5 | 7 | 9 | 12 | 16 |
| Precipitation (mm) | 83 | 80 | 68 | 59 | 46 | 9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 33 | 30 | 26 | 19 | 15 |
| Avg temp (°C) | 26 | 26 | 24 | 20 | 14 | 11 |
| Avg low (°C) | 19 | 20 | 18 | 14 | 9 | 6 |
| Precipitation (mm) | 2 | 10 | 28 | 50 | 102 | 85 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 10 | 9 | 8 | 6 | 2 | 1 | 2 | 5 | 7 | 10 | 10 |
| Days with high ≥ 32°C (days) | — | — | 0.1 | — | 1 | 4 | 10 | 13 | 4 | 2 | 0.0 | — |
| Days with low ≤ 0°C (days) | 0.9 | 0.8 | 0.2 | 0.0 | — | — | — | — | — | — | — | 0.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 10 | 9 | 8 | 6 | 2 |
| Days with high ≥ 32°C (days) | — | — | 0.1 | — | 1 | 4 |
| Days with low ≤ 0°C (days) | 0.9 | 0.8 | 0.2 | 0.0 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 1 | 2 | 5 | 7 | 10 | 10 |
| Days with high ≥ 32°C (days) | 10 | 13 | 4 | 2 | 0.0 | — |
| Days with low ≤ 0°C (days) | — | — | — | — | — | 0.2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 54 | 53 | 51 | 50 | 46 | 32 | 24 | 27 | 40 | 44 | 51 | 54 |
| Clear days (≤ 30% cloud) | 8 | 8 | 9 | 9 | 11 | 17 | 21 | 20 | 13 | 12 | 9 | 8 |
| Partly cloudy days (30–70%) | 11 | 10 | 12 | 11 | 11 | 8 | 8 | 8 | 11 | 11 | 11 | 12 |
| Cloudy days (≥ 70%) | 12 | 10 | 10 | 10 | 9 | 4 | 3 | 3 | 6 | 8 | 10 | 11 |
| Relative humidity (%) | 79 | 77 | 74 | 70 | 65 | 56 | 49 | 51 | 62 | 66 | 73 | 78 |
| Wind speed (km/h) | 9.4 | 9.4 | 9.1 | 8.8 | 7.9 | 7.6 | 7.6 | 7.7 | 8.0 | 8.2 | 9.6 | 9.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 54 | 53 | 51 | 50 | 46 | 32 |
| Clear days (≤ 30% cloud) | 8 | 8 | 9 | 9 | 11 | 17 |
| Partly cloudy days (30–70%) | 11 | 10 | 12 | 11 | 11 | 8 |
| Cloudy days (≥ 70%) | 12 | 10 | 10 | 10 | 9 | 4 |
| Relative humidity (%) | 79 | 77 | 74 | 70 | 65 | 56 |
| Wind speed (km/h) | 9.4 | 9.4 | 9.1 | 8.8 | 7.9 | 7.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 24 | 27 | 40 | 44 | 51 | 54 |
| Clear days (≤ 30% cloud) | 21 | 20 | 13 | 12 | 9 | 8 |
| Partly cloudy days (30–70%) | 8 | 8 | 11 | 11 | 11 | 12 |
| Cloudy days (≥ 70%) | 3 | 3 | 6 | 8 | 10 | 11 |
| Relative humidity (%) | 49 | 51 | 62 | 66 | 73 | 78 |
| Wind speed (km/h) | 7.6 | 7.7 | 8.0 | 8.2 | 9.6 | 9.4 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Alger-dar EL Beida, a weather station, about 21 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.