| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -9.3° | -16.2° | 36.9mm | 19.7 | 0 |
| February | -7.2° | -14.9° | 33.7mm | 16 | 0 |
| March | -0.1° | -9.3° | 29.7mm | 13.1 | 4 |
| April | 8.3° | -2.1° | 28.4mm | 10.1 | 36 |
| May | 16.2° | 4.1° | 50.7mm | 13.1 | 62 |
| June | 21° | 9° | 63.4mm | 13.1 | 74 |
| July | 23.8° | 12.1° | 79.4mm | 13 | 74 |
| August | 20.3° | 10° | 62.9mm | 14 | 72 |
| September | 14.1° | 5.6° | 55.3mm | 14.6 | 52 |
| October | 5.5° | 0.5° | 59.7mm | 17.1 | 21 |
| November | -2° | -6.6° | 50.4mm | 19.3 | 2 |
| December | -6.9° | -12.9° | 41.4mm | 19.8 | 0 |
January in Kotlas averages a daily high of -9.3°C with nights around -16.2°C. Expect roughly 19.7 wet days totalling 36.9mm. A hard month to visit for comfort alone.
February in Kotlas averages a daily high of -7.2°C with nights around -14.9°C. Expect roughly 16 wet days totalling 33.7mm. A hard month to visit for comfort alone.
March in Kotlas averages a daily high of -0.1°C with nights around -9.3°C. Expect roughly 13.1 wet days totalling 29.7mm. A hard month to visit for comfort alone.
April in Kotlas averages a daily high of 8.3°C with nights around -2.1°C. Expect roughly 10.1 wet days totalling 28.4mm. Demanding conditions — pack for it and plan indoor options.
May in Kotlas averages a daily high of 16.2°C with nights around 4.1°C. Expect roughly 13.1 wet days totalling 50.7mm. Generally workable, with some weather to plan around.
June in Kotlas averages a daily high of 21°C with nights around 9°C. Expect roughly 13.1 wet days totalling 63.4mm. Generally workable, with some weather to plan around.
July in Kotlas averages a daily high of 23.8°C with nights around 12.1°C. Expect roughly 13 wet days totalling 79.4mm. Generally workable, with some weather to plan around.
August in Kotlas averages a daily high of 20.3°C with nights around 10°C. Expect roughly 14 wet days totalling 62.9mm. Generally workable, with some weather to plan around.
September in Kotlas averages a daily high of 14.1°C with nights around 5.6°C. Expect roughly 14.6 wet days totalling 55.3mm. Demanding conditions — pack for it and plan indoor options.
October in Kotlas averages a daily high of 5.5°C with nights around 0.5°C. Expect roughly 17.1 wet days totalling 59.7mm. A hard month to visit for comfort alone.
November in Kotlas averages a daily high of -2°C with nights around -6.6°C. Expect roughly 19.3 wet days totalling 50.4mm. A hard month to visit for comfort alone.
December in Kotlas averages a daily high of -6.9°C with nights around -12.9°C. Expect roughly 19.8 wet days totalling 41.4mm. 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. Kotlas peaks at 74.
Based on 30 years of records, June–August scores highest for comfort in Kotlas, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 23.8°C.
July is the wettest, averaging 79.4mm of rain across roughly 13 wet days.
January is the coolest month, with average daily highs around -9.3°C.