Climate averages 1991–2020
Tatvan weather
in September.
A warm, very dry month: the 3rd warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Tatvan: daytime highs average 24.0°C and nights cool to about 14.4°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 14 mm of rain on roughly 3 days, which makes September a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 28 min on an average September day.
The nearest other city in this atlas is Siirt (69 km away). In September its highs average 29.6°C, 5.6°C warmer than Tatvan, with 6.2 mm of rain.
Among the 138 cities listed in Turkey, Tatvan ranks joint 104th of 138 for the warmest September highs and joint 45th of 138 for the driest September (rainfall, lowest first). The mean September high of those 138 cities is 27.1°C; Tatvan is 3.1°C cooler than that mean.
From September to October, average highs fall by 7.2°C to 16.8°C, and monthly rainfall rises from 14 mm to 57 mm.
The annual picture
September 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, selected | 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 | 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
September in nearby cities
- Siirt in SeptemberTurkey · 69 kmHigh 29.6°C · Low 14.7°C · 6.2 mm rain
- Muş in SeptemberTurkey · 74 kmHigh 25.7°C · Low 13.7°C · 23 mm rain
- Patnos in SeptemberTurkey · 95 kmHigh 24.5°C · Low 9.7°C · 17 mm rain
- Van in SeptemberTurkey · 96 kmHigh 23.7°C · Low 12.2°C · 12 mm rain
- Erciş in SeptemberTurkey · 111 kmHigh 22.5°C · Low 14.9°C · 20 mm rain
- Batman in SeptemberTurkey · 121 kmHigh 32.9°C · Low 19.2°C · 6.0 mm rain
- Cizre in SeptemberTurkey · 129 kmHigh 34.6°C · Low 18.4°C · 1.4 mm rain
- Silopi in SeptemberTurkey · 140 kmHigh 33.3°C · Low 16.6°C · 1.1 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.