Climate averages 1991–2020
Muscat 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 Muscat: daytime highs average 34.6°C and nights cool to about 26.7°C. By daytime temperature it is the 5th warmest of the 12 months.
Rain is very rare: less than 1 mm falls in a typical September (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 Seeb (24 km away). In September its highs average 34.9°C, about as warm as Muscat, with almost no rain (under 1 mm).
Among the 12 cities listed in Oman, Muscat ranks 11th of 12 for the warmest September highs and 5th of 12 for the driest September (rainfall, lowest first). The mean September high of those 12 cities is 36.7°C; Muscat is 2.1°C cooler than that mean.
From September to October, average highs fall by 1.7°C to 33.0°C, and monthly rainfall rises from under 1 mm to 1.3 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
Muscat climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 23.7°C16.6°C | 16.6°C | 18 | 2.5 | 10.911 h |
| February | 25.3°C17.6°C | 17.6°C | 11 | 1.5 | 11.411 h |
| March | 28.0°C20.1°C | 20.1°C | 18 | 2.3 | 12.012 h |
| April | 32.4°C23.9°C | 23.9°C | 7.0 | 1.3 | 12.713 h |
| May | 36.5°C27.8°C | 27.8°C | 0.9 | 0.4 | 13.313 h |
| June | 37.3°C29.3°C | 29.3°C | 10 | 0.3 | 13.614 h |
| July | 36.5°C29.6°C | 29.6°C | 4.2 | 0.2 | 13.413 h |
| August | 35.5°C28.5°C | 28.5°C | 1.0 | 0.2 | 13.013 h |
| September, selected | 34.6°C26.7°C | 26.7°C | 0.2 | 0.1 | 12.312 h |
| October | 33.0°C24.5°C | 24.5°C | 1.3 | 0.6 | 11.612 h |
| November | 28.6°C21.1°C | 21.1°C | 12 | 0.9 | 11.011 h |
| December | 25.1°C18.2°C | 18.2°C | 13 | 1.8 | 10.711 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
- Seeb in SeptemberOman · 24 kmHigh 34.9°C · Low 26.9°C · 0.1 mm rain
- Samā’il in SeptemberOman · 56 kmHigh 38.7°C · Low 27.0°C · 0.4 mm rain
- Rustaq in SeptemberOman · 103 kmHigh 39.0°C · Low 28.7°C · 1.7 mm rain
- As Suwayq in SeptemberOman · 103 kmHigh 37.7°C · Low 26.4°C · 0.1 mm rain
- Nizwá in SeptemberOman · 115 kmHigh 38.0°C · Low 25.8°C · 2.3 mm rain
- Sur in SeptemberOman · 161 kmHigh 35.1°C · Low 26.5°C · 0.1 mm rain
- Şaḩam in SeptemberOman · 168 kmHigh 36.3°C · Low 27.2°C · 0.1 mm rain
- Sohar in SeptemberOman · 192 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 Muscat) is explained once on the Muscat year overview and on the Sources, method and limits page.