Climate averages 1991–2020
Rustaq weather
in December.
A warm, very dry month: the 11th warmest and the joint 9th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Rustaq: daytime highs average 26.0°C and nights cool to about 17.5°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 14 mm of rain on roughly 2 days, which makes December a very dry month (the joint 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 44 min on an average December day.
The nearest other city in this atlas is As Suwayq (51 km away). In December its highs average 26.2°C, about as warm as Rustaq, with 5.2 mm of rain.
Among the 12 cities listed in Oman, Rustaq ranks joint 5th of 12 for the warmest December highs and joint 11th of 12 for the driest December (rainfall, lowest first). The mean December high of those 12 cities is 26.0°C; Rustaq is level with that mean.
From December to January, average highs fall by 1.4°C to 24.6°C, and monthly rainfall stays at 14 mm.
The annual picture
December 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
Rustaq climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.6°C15.6°C | 15.6°C | 14 | 2.5 | 10.911 h |
| February | 27.1°C17.2°C | 17.2°C | 14 | 2.2 | 11.411 h |
| March | 30.7°C20.3°C | 20.3°C | 20 | 2.7 | 12.012 h |
| April | 36.2°C24.9°C | 24.9°C | 13 | 1.8 | 12.713 h |
| May | 40.9°C28.7°C | 28.7°C | 2.3 | 0.7 | 13.313 h |
| June | 42.3°C30.9°C | 30.9°C | 5.0 | 0.2 | 13.514 h |
| July | 41.7°C31.5°C | 31.5°C | 6.0 | 0.4 | 13.413 h |
| August | 40.8°C30.6°C | 30.6°C | 1.0 | 0.3 | 12.913 h |
| September | 39.0°C28.7°C | 28.7°C | 1.7 | 0.3 | 12.312 h |
| October | 35.4°C25.3°C | 25.3°C | 2.7 | 0.7 | 11.612 h |
| November | 29.8°C20.9°C | 20.9°C | 11 | 1.3 | 11.011 h |
| December, selected | 26.0°C17.5°C | 17.5°C | 14 | 2.2 | 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
December in nearby cities
- As Suwayq in DecemberOman · 51 kmHigh 26.2°C · Low 16.6°C · 5.2 mm rain
- Nizwá in DecemberOman · 52 kmHigh 26.5°C · Low 14.7°C · 5.8 mm rain
- Samā’il in DecemberOman · 55 kmHigh 25.9°C · Low 16.9°C · 14 mm rain
- Seeb in DecemberOman · 84 kmHigh 25.3°C · Low 18.7°C · 12 mm rain
- ‘Ibrī in DecemberOman · 95 kmHigh 26.5°C · Low 12.9°C · 5.0 mm rain
- Muscat in DecemberOman · 103 kmHigh 25.1°C · Low 18.2°C · 13 mm rain
- Şaḩam in DecemberOman · 103 kmHigh 25.6°C · Low 16.9°C · 8.8 mm rain
- Sohar in DecemberOman · 129 kmHigh 26.0°C · Low 16.4°C · 12 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 Rustaq) is explained once on the Rustaq year overview and on the Sources, method and limits page.