Climate averages 1991–2020
Golestān weather
in December.
A cool, moderately wet month: the 11th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Golestān: daytime highs average 9.9°C and nights cool to about -0.3°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 45 mm of rain on roughly 8 days, which makes December a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 48 min on an average December day.
The nearest other city in this atlas is Eslamshahr (6 km away). In December its highs average 9.3°C, 0.6°C cooler than Golestān, with 45 mm of rain.
Among the 128 cities listed in Iran, Golestān ranks joint 63rd of 128 for the warmest December highs and joint 79th of 128 for the driest December (rainfall, lowest first). The mean December high of those 128 cities is 10.9°C; Golestān is 1.0°C cooler than that mean.
From December to January, average highs fall by 1.8°C to 8.1°C, and monthly rainfall falls from 45 mm to 42 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
Golestān climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.1°C-3.0°C | -3.0°C | 42 | 7.7 | 10.010 h |
| February | 10.7°C-1.4°C | -1.4°C | 42 | 8.2 | 10.911 h |
| March | 16.2°C2.8°C | 2.8°C | 54 | 9.3 | 11.912 h |
| April | 22.5°C8.5°C | 8.5°C | 42 | 7.1 | 13.113 h |
| May | 28.9°C14.2°C | 14.2°C | 16 | 3.2 | 14.014 h |
| June | 34.9°C19.8°C | 19.8°C | 2.6 | 0.7 | 14.515 h |
| July | 37.4°C23.2°C | 23.2°C | 1.7 | 0.4 | 14.314 h |
| August | 36.3°C22.2°C | 22.2°C | 1.4 | 0.2 | 13.513 h |
| September | 31.7°C17.4°C | 17.4°C | 1.4 | 0.4 | 12.412 h |
| October | 24.5°C11.4°C | 11.4°C | 16 | 3.1 | 11.311 h |
| November | 15.3°C4.5°C | 4.5°C | 43 | 6.9 | 10.310 h |
| December, selected | 9.9°C-0.3°C | -0.3°C | 45 | 7.7 | 9.810 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
- Eslamshahr in DecemberIran · 6 kmHigh 9.3°C · Low -1.0°C · 45 mm rain
- Robāţ Karīm in DecemberIran · 10 kmHigh 9.9°C · Low -0.1°C · 36 mm rain
- Bāghestān in DecemberIran · 15 kmHigh 9.2°C · Low -1.4°C · 43 mm rain
- Shahrīār in DecemberIran · 19 kmHigh 8.5°C · Low -2.1°C · 37 mm rain
- Parand in DecemberIran · 19 kmHigh 9.5°C · Low -0.4°C · 36 mm rain
- Shahre Jadide Andisheh in DecemberIran · 23 kmHigh 8.3°C · Low -2.3°C · 37 mm rain
- Tehran in DecemberIran · 29 kmHigh 7.6°C · Low -2.2°C · 43 mm rain
- Moḩammad Shahr in DecemberIran · 36 kmHigh 8.0°C · Low -2.9°C · 37 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 Golestān) is explained once on the Golestān year overview and on the Sources, method and limits page.
Eslamshahr lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.