| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -13.5° | -21.9° | 20.9mm | 12.2 | 6 |
| February | -9.9° | -19.1° | 18mm | 10.2 | 10 |
| March | -1.7° | -10.9° | 19.8mm | 9.5 | 11 |
| April | 10.2° | -0.1° | 26.2mm | 8.8 | 48 |
| May | 19.3° | 6.5° | 33.1mm | 9.7 | 78 |
| June | 23.8° | 12.1° | 55.3mm | 11.7 | 77 |
| July | 24.9° | 13.9° | 64.9mm | 12.5 | 75 |
| August | 22.9° | 11.8° | 54.4mm | 11.6 | 77 |
| September | 16.4° | 5.8° | 26.8mm | 9.3 | 70 |
| October | 7.9° | -0.3° | 34.9mm | 12 | 34 |
| November | -3.2° | -9.7° | 34.7mm | 13.5 | 3 |
| December | -9.9° | -17.8° | 28.8mm | 14.9 | 0 |
January in Omsk averages a daily high of -13.5°C with nights around -21.9°C. Expect roughly 12.2 wet days totalling 20.9mm. A hard month to visit for comfort alone.
February in Omsk averages a daily high of -9.9°C with nights around -19.1°C. Expect roughly 10.2 wet days totalling 18mm. A hard month to visit for comfort alone.
March in Omsk averages a daily high of -1.7°C with nights around -10.9°C. Expect roughly 9.5 wet days totalling 19.8mm. A hard month to visit for comfort alone.
April in Omsk averages a daily high of 10.2°C with nights around -0.1°C. Expect roughly 8.8 wet days totalling 26.2mm. Demanding conditions — pack for it and plan indoor options.
May in Omsk averages a daily high of 19.3°C with nights around 6.5°C. Expect roughly 9.7 wet days totalling 33.1mm. Comfortable conditions for being outdoors all day.
June in Omsk averages a daily high of 23.8°C with nights around 12.1°C. Expect roughly 11.7 wet days totalling 55.3mm. Comfortable conditions for being outdoors all day.
July in Omsk averages a daily high of 24.9°C with nights around 13.9°C. Expect roughly 12.5 wet days totalling 64.9mm. Comfortable conditions for being outdoors all day.
August in Omsk averages a daily high of 22.9°C with nights around 11.8°C. Expect roughly 11.6 wet days totalling 54.4mm. Comfortable conditions for being outdoors all day.
September in Omsk averages a daily high of 16.4°C with nights around 5.8°C. Expect roughly 9.3 wet days totalling 26.8mm. Generally workable, with some weather to plan around.
October in Omsk averages a daily high of 7.9°C with nights around -0.3°C. Expect roughly 12 wet days totalling 34.9mm. A hard month to visit for comfort alone.
November in Omsk averages a daily high of -3.2°C with nights around -9.7°C. Expect roughly 13.5 wet days totalling 34.7mm. A hard month to visit for comfort alone.
December in Omsk averages a daily high of -9.9°C with nights around -17.8°C. Expect roughly 14.9 wet days totalling 28.8mm. A hard month to visit for comfort alone.
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. Omsk peaks at 78.
Based on 30 years of records, May–September scores highest for comfort in Omsk, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 24.9°C.
July is the wettest, averaging 64.9mm of rain across roughly 12.5 wet days.
January is the coolest month, with average daily highs around -13.5°C.