| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 7.6° | 0.7° | 114.8mm | 14.5 | 29 |
| February | 9.2° | 2.1° | 96.9mm | 13.7 | 38 |
| March | 14.4° | 5.5° | 95.2mm | 14.4 | 53 |
| April | 20° | 10.5° | 84.2mm | 12.4 | 75 |
| May | 26.3° | 14.8° | 49.3mm | 10.6 | 79 |
| June | 33.3° | 20.9° | 11.4mm | 4.3 | 66 |
| July | 37.7° | 24.8° | 1.8mm | 0.8 | 56 |
| August | 37.9° | 24.6° | 2mm | 0.8 | 55 |
| September | 32.9° | 20.1° | 7.6mm | 1.7 | 73 |
| October | 25.2° | 14.2° | 59.3mm | 8.3 | 83 |
| November | 15.6° | 7.4° | 77.6mm | 8 | 70 |
| December | 9.6° | 2.7° | 79.4mm | 10.9 | 45 |
January in Siirt averages a daily high of 7.6°C with nights around 0.7°C. Expect roughly 14.5 wet days totalling 114.8mm. A hard month to visit for comfort alone.
February in Siirt averages a daily high of 9.2°C with nights around 2.1°C. Expect roughly 13.7 wet days totalling 96.9mm. Demanding conditions — pack for it and plan indoor options.
March in Siirt averages a daily high of 14.4°C with nights around 5.5°C. Expect roughly 14.4 wet days totalling 95.2mm. Demanding conditions — pack for it and plan indoor options.
April in Siirt averages a daily high of 20°C with nights around 10.5°C. Expect roughly 12.4 wet days totalling 84.2mm. Comfortable conditions for being outdoors all day.
May in Siirt averages a daily high of 26.3°C with nights around 14.8°C. Expect roughly 10.6 wet days totalling 49.3mm. Comfortable conditions for being outdoors all day.
June in Siirt averages a daily high of 33.3°C with nights around 20.9°C. Expect roughly 4.3 wet days totalling 11.4mm. Generally workable, with some weather to plan around.
July in Siirt averages a daily high of 37.7°C with nights around 24.8°C. Rain is rare — about 0.8 wet days and 1.8mm across the month. Generally workable, with some weather to plan around.
August in Siirt averages a daily high of 37.9°C with nights around 24.6°C. Rain is rare — about 0.8 wet days and 2mm across the month. Generally workable, with some weather to plan around.
September in Siirt averages a daily high of 32.9°C with nights around 20.1°C. Rain is rare — about 1.7 wet days and 7.6mm across the month. Generally workable, with some weather to plan around.
October in Siirt averages a daily high of 25.2°C with nights around 14.2°C. Expect roughly 8.3 wet days totalling 59.3mm. Comfortable conditions for being outdoors all day.
November in Siirt averages a daily high of 15.6°C with nights around 7.4°C. Expect roughly 8 wet days totalling 77.6mm. Generally workable, with some weather to plan around.
December in Siirt averages a daily high of 9.6°C with nights around 2.7°C. Expect roughly 10.9 wet days totalling 79.4mm. Demanding conditions — pack for it and plan indoor options.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Siirt peaks at 83.
Based on 30 years of records, April–May scores highest for comfort in Siirt, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 37.9°C.
January is the wettest, averaging 114.8mm of rain across roughly 14.5 wet days.
January is the coolest month, with average daily highs around 7.6°C.