Climate averages 1991–2020
Siirt weather
in December.
A cold, wet month: the 10th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Siirt: daytime highs average 7.4°C and nights cool to about -2.1°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 108 mm of rain on roughly 11 days, which makes December a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 35 min on an average December day.
The nearest other city in this atlas is Tatvan (69 km away). In December its highs average 2.6°C, 4.8°C cooler than Siirt, with 95 mm of rain.
Among the 138 cities listed in Turkey, Siirt ranks 101st of 138 for the warmest December highs and joint 107th of 138 for the driest December (rainfall, lowest first). The mean December high of those 138 cities is 9.3°C; Siirt is 1.9°C cooler than that mean.
From December to January, average highs fall by 2.0°C to 5.4°C, and monthly rainfall rises from 108 mm to 112 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
Siirt climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.4°C-3.9°C | -3.9°C | 112 | 12.3 | 9.910 h |
| February | 7.1°C-3.1°C | -3.1°C | 118 | 11.8 | 10.811 h |
| March | 11.9°C0.4°C | 0.4°C | 134 | 13.8 | 11.912 h |
| April | 17.3°C5.0°C | 5.0°C | 114 | 13.1 | 13.213 h |
| May | 23.0°C9.9°C | 9.9°C | 60 | 9.0 | 14.214 h |
| June | 29.8°C15.3°C | 15.3°C | 5.9 | 1.7 | 14.715 h |
| July | 34.7°C19.5°C | 19.5°C | 0.9 | 0.3 | 14.515 h |
| August | 34.7°C19.3°C | 19.3°C | 0.7 | 0.2 | 13.614 h |
| September | 29.6°C14.7°C | 14.7°C | 6.2 | 1.1 | 12.512 h |
| October | 22.2°C9.2°C | 9.2°C | 46 | 5.5 | 11.211 h |
| November | 13.4°C2.3°C | 2.3°C | 74 | 7.5 | 10.210 h |
| December, selected | 7.4°C-2.1°C | -2.1°C | 108 | 10.5 | 9.610 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
- Tatvan in DecemberTurkey · 69 kmHigh 2.6°C · Low -2.5°C · 95 mm rain
- Cizre in DecemberTurkey · 70 kmHigh 12.1°C · Low 1.4°C · 99 mm rain
- Batman in DecemberTurkey · 71 kmHigh 9.5°C · Low 1.7°C · 94 mm rain
- Midyat in DecemberTurkey · 78 kmHigh 8.7°C · Low 0.9°C · 83 mm rain
- Silopi in DecemberTurkey · 89 kmHigh 11.5°C · Low 0.3°C · 98 mm rain
- Muş in DecemberTurkey · 98 kmHigh 2.8°C · Low -4.2°C · 118 mm rain
- Zaxo in DecemberIraq · 109 kmHigh 12.0°C · Low 1.4°C · 105 mm rain
- Bismil in DecemberTurkey · 113 kmHigh 10.0°C · Low 1.5°C · 70 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 Siirt) is explained once on the Siirt year overview and on the Sources, method and limits page.