Climate averages 1991–2020
Rouissat weather
in May.
A hot, very dry month: the 5th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Rouissat: daytime highs average 33.7°C and nights cool to about 19.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 1.9 mm of rain on fewer than one day, which makes May a very dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 46 min on an average May day.
The nearest other city in this atlas is Ouargla (4 km away). In May its highs average 33.6°C, about as warm as Rouissat, with 1.9 mm of rain.
Among the 55 cities listed in Algeria, Rouissat ranks joint 1st of 55 for the warmest May highs and joint 1st of 55 for the driest May (rainfall, lowest first). The mean May high of those 55 cities is 25.6°C; Rouissat is 8.0°C warmer than that mean.
From May to June, average highs rise by 4.9°C to 38.5°C, and monthly rainfall falls from 1.9 mm to under 1 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Rouissat climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 16.4°C4.8°C | 4.8°C | 7.2 | 1.2 | 10.310 h |
| February | 19.0°C6.5°C | 6.5°C | 2.6 | 0.8 | 11.011 h |
| March | 23.7°C10.5°C | 10.5°C | 5.1 | 1.0 | 12.012 h |
| April | 28.5°C14.9°C | 14.9°C | 3.5 | 0.7 | 12.913 h |
| May, selected | 33.7°C19.8°C | 19.8°C | 1.9 | 0.3 | 13.814 h |
| June | 38.5°C24.2°C | 24.2°C | 0.3 | 0.1 | 14.214 h |
| July | 41.5°C26.9°C | 26.9°C | 0.2 | 0.0 | 14.014 h |
| August | 40.7°C26.7°C | 26.7°C | 0.4 | 0.0 | 13.313 h |
| September | 36.0°C23.1°C | 23.1°C | 3.0 | 0.7 | 12.412 h |
| October | 29.5°C17.3°C | 17.3°C | 3.7 | 0.6 | 11.411 h |
| November | 21.9°C10.4°C | 10.4°C | 3.9 | 0.9 | 10.611 h |
| December | 17.0°C6.0°C | 6.0°C | 4.3 | 1.1 | 10.110 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Ouargla in MayAlgeria · 4 kmHigh 33.6°C · Low 19.8°C · 1.9 mm rain
- Touggourt in MayAlgeria · 148 kmHigh 32.0°C · Low 18.3°C · 2.1 mm rain
- Ghardaïa in MayAlgeria · 170 kmHigh 31.1°C · Low 18.0°C · 3.2 mm rain
- El Oued in MayAlgeria · 213 kmHigh 32.0°C · Low 18.3°C · 2.8 mm rain
- Messaad in MayAlgeria · 302 kmHigh 27.7°C · Low 14.4°C · 14 mm rain
- Laghouat in MayAlgeria · 312 kmHigh 28.5°C · Low 14.3°C · 12 mm rain
- Biskra in MayAlgeria · 327 kmHigh 30.9°C · Low 18.2°C · 6.4 mm rain
- Djelfa in MayAlgeria · 362 kmHigh 24.6°C · Low 11.3°C · 30 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Rouissat) is explained once on the Rouissat year overview and on the Sources, method and limits page.
Ouargla lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.