| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 10.2° | 4° | 138mm | 15.8 | 39 |
| February | 10.7° | 5.6° | 87.9mm | 14.4 | 41 |
| March | 12.3° | 2.9° | 114.2mm | 17.6 | 45 |
| April | 14.7° | 8.7° | 68.8mm | 14.4 | 54 |
| May | 19.2° | 13.7° | 76.8mm | 13.9 | 70 |
| June | 24.2° | 18.6° | 94.8mm | 13.6 | 73 |
| July | 27.4° | 21.4° | 105mm | 10.8 | 77 |
| August | 27.9° | 22.4° | 67.6mm | 11.3 | 74 |
| September | 24.5° | 19° | 161.2mm | 12.9 | 74 |
| October | 20.1° | 15.4° | 204.1mm | 17.2 | 70 |
| November | 16.4° | 11.4° | 163.4mm | 13 | 62 |
| December | 12.9° | 5.9° | 135.5mm | 14.3 | 49 |
January in Giresun averages a daily high of 10.2°C with nights around 4°C. Expect roughly 15.8 wet days totalling 138mm. Demanding conditions — pack for it and plan indoor options.
February in Giresun averages a daily high of 10.7°C with nights around 5.6°C. Expect roughly 14.4 wet days totalling 87.9mm. Demanding conditions — pack for it and plan indoor options.
March in Giresun averages a daily high of 12.3°C with nights around 2.9°C. Expect roughly 17.6 wet days totalling 114.2mm. Demanding conditions — pack for it and plan indoor options.
April in Giresun averages a daily high of 14.7°C with nights around 8.7°C. Expect roughly 14.4 wet days totalling 68.8mm. Demanding conditions — pack for it and plan indoor options.
May in Giresun averages a daily high of 19.2°C with nights around 13.7°C. Expect roughly 13.9 wet days totalling 76.8mm. Generally workable, with some weather to plan around.
June in Giresun averages a daily high of 24.2°C with nights around 18.6°C. Expect roughly 13.6 wet days totalling 94.8mm. Generally workable, with some weather to plan around.
July in Giresun averages a daily high of 27.4°C with nights around 21.4°C. Expect roughly 10.8 wet days totalling 105mm. Comfortable conditions for being outdoors all day.
August in Giresun averages a daily high of 27.9°C with nights around 22.4°C. Expect roughly 11.3 wet days totalling 67.6mm. Generally workable, with some weather to plan around.
September in Giresun averages a daily high of 24.5°C with nights around 19°C. Expect roughly 12.9 wet days totalling 161.2mm. Generally workable, with some weather to plan around.
October in Giresun averages a daily high of 20.1°C with nights around 15.4°C. Expect roughly 17.2 wet days totalling 204.1mm. Generally workable, with some weather to plan around.
November in Giresun averages a daily high of 16.4°C with nights around 11.4°C. Expect roughly 13 wet days totalling 163.4mm. Generally workable, with some weather to plan around.
December in Giresun averages a daily high of 12.9°C with nights around 5.9°C. Expect roughly 14.3 wet days totalling 135.5mm. 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. Giresun peaks at 77.
Based on 30 years of records, May–October scores highest for comfort in Giresun, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 27.9°C.
October is the wettest, averaging 204.1mm of rain across roughly 17.2 wet days.
January is the coolest month, with average daily highs around 10.2°C.