Climate averages 1991–2020
Nizwá weather
in September.
A very hot, very dry month: the 5th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a very hot month in Nizwá: daytime highs average 38.0°C and nights cool to about 25.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 2.3 mm of rain on fewer than one day, which makes September a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 18 min on an average September day.
The nearest other city in this atlas is Rustaq (52 km away). In September its highs average 39.0°C, 1.0°C warmer than Nizwá, with 1.7 mm of rain.
Among the 12 cities listed in Oman, Nizwá ranks 5th of 12 for the warmest September highs and 11th of 12 for the driest September (rainfall, lowest first). The mean September high of those 12 cities is 36.7°C; Nizwá is 1.3°C warmer than that mean.
From September to October, average highs fall by 3.0°C to 35.1°C, and monthly rainfall rises from 2.3 mm to 6.2 mm.
The annual picture
September 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
Nizwá climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.6°C13.2°C | 13.2°C | 7.4 | 1.3 | 10.911 h |
| February | 27.3°C14.9°C | 14.9°C | 5.6 | 1.1 | 11.411 h |
| March | 30.9°C17.9°C | 17.9°C | 20 | 2.3 | 12.012 h |
| April | 35.8°C22.3°C | 22.3°C | 11 | 2.1 | 12.713 h |
| May | 40.0°C25.9°C | 25.9°C | 4.7 | 1.6 | 13.213 h |
| June | 41.8°C27.8°C | 27.8°C | 7.6 | 1.6 | 13.514 h |
| July | 41.1°C28.5°C | 28.5°C | 16 | 3.4 | 13.413 h |
| August | 40.0°C27.7°C | 27.7°C | 15 | 4.0 | 12.913 h |
| September, selected | 38.0°C25.8°C | 25.8°C | 2.3 | 0.7 | 12.312 h |
| October | 35.1°C22.5°C | 22.5°C | 6.2 | 1.2 | 11.612 h |
| November | 30.0°C18.4°C | 18.4°C | 11 | 1.2 | 11.111 h |
| December | 26.5°C14.7°C | 14.7°C | 5.8 | 0.8 | 10.811 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
September in nearby cities
- Rustaq in SeptemberOman · 52 kmHigh 39.0°C · Low 28.7°C · 1.7 mm rain
- Samā’il in SeptemberOman · 59 kmHigh 38.7°C · Low 27.0°C · 0.4 mm rain
- As Suwayq in SeptemberOman · 102 kmHigh 37.7°C · Low 26.4°C · 0.1 mm rain
- Seeb in SeptemberOman · 106 kmHigh 34.9°C · Low 26.9°C · 0.1 mm rain
- ‘Ibrī in SeptemberOman · 109 kmHigh 39.4°C · Low 25.1°C · 0.7 mm rain
- Muscat in SeptemberOman · 115 kmHigh 34.6°C · Low 26.7°C · 0.2 mm rain
- Şaḩam in SeptemberOman · 153 kmHigh 36.3°C · Low 27.2°C · 0.1 mm rain
- Sohar in SeptemberOman · 178 kmHigh 36.9°C · Low 27.0°C · 0.4 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 Nizwá) is explained once on the Nizwá year overview and on the Sources, method and limits page.