Climate averages 1991–2020
Tatvan 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 Tatvan: daytime highs average 2.6°C and nights cool to about -2.5°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 95 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 32 min on an average December day.
The nearest other city in this atlas is Siirt (69 km away). In December its highs average 7.4°C, 4.8°C warmer than Tatvan, with 108 mm of rain.
Among the 138 cities listed in Turkey, Tatvan ranks 131st of 138 for the warmest December highs and 81st of 138 for the driest December (rainfall, lowest first). The mean December high of those 138 cities is 9.3°C; Tatvan is 6.7°C cooler than that mean.
From December to January, average highs fall by 2.4°C to 0.2°C, and monthly precipitation rises from 95 mm to 96 mm.
The annual picture
December in context
Monthly precipitation
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
Tatvan climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 0.2°C-4.8°C | -4.8°C | 96 | 11.7 | 9.810 h |
| February | 1.1°C-4.2°C | -4.2°C | 103 | 11.2 | 10.711 h |
| March | 5.1°C-0.9°C | -0.9°C | 122 | 14.3 | 11.912 h |
| April | 10.6°C3.3°C | 3.3°C | 118 | 15.8 | 13.213 h |
| May | 17.3°C8.5°C | 8.5°C | 84 | 15.0 | 14.214 h |
| June | 23.8°C13.5°C | 13.5°C | 23 | 5.3 | 14.815 h |
| July | 28.7°C17.2°C | 17.2°C | 8.0 | 2.3 | 14.615 h |
| August | 29.0°C18.0°C | 18.0°C | 4.5 | 1.2 | 13.714 h |
| September | 24.0°C14.4°C | 14.4°C | 14 | 2.6 | 12.512 h |
| October | 16.8°C9.1°C | 9.1°C | 57 | 8.1 | 11.211 h |
| November | 8.6°C2.4°C | 2.4°C | 73 | 8.8 | 10.110 h |
| December, selected | 2.6°C-2.5°C | -2.5°C | 95 | 10.7 | 9.510 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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
- Siirt in DecemberTurkey · 69 kmHigh 7.4°C · Low -2.1°C · 108 mm rain
- Muş in DecemberTurkey · 74 kmHigh 2.8°C · Low -4.2°C · 118 mm rain
- Patnos in DecemberTurkey · 95 kmHigh 2.2°C · Low -8.2°C · 49 mm rain
- Van in DecemberTurkey · 96 kmHigh 3.0°C · Low -5.2°C · 35 mm rain
- Erciş in DecemberTurkey · 111 kmHigh 2.4°C · Low -2.1°C · 55 mm rain
- Batman in DecemberTurkey · 121 kmHigh 9.5°C · Low 1.7°C · 94 mm rain
- Cizre in DecemberTurkey · 129 kmHigh 12.1°C · Low 1.4°C · 99 mm rain
- Silopi in DecemberTurkey · 140 kmHigh 11.5°C · Low 0.3°C · 98 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 Tatvan) is explained once on the Tatvan year overview and on the Sources, method and limits page.