| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -10.6° | -19.5° | 16.5mm | 10.1 | 10 |
| February | -7.9° | -17.5° | 14.9mm | 8.5 | 13 |
| March | -1.2° | -10.8° | 17.3mm | 6.6 | 17 |
| April | 11.3° | 0.3° | 29.1mm | 6.9 | 56 |
| May | 21.2° | 8.2° | 39.3mm | 8.9 | 82 |
| June | 26.2° | 13.5° | 40.2mm | 8 | 84 |
| July | 27.5° | 15° | 51.5mm | 8.5 | 81 |
| August | 25.2° | 13° | 39.8mm | 9 | 82 |
| September | 19.4° | 7.4° | 27.4mm | 7 | 84 |
| October | 10.5° | 0.9° | 32.1mm | 9.5 | 49 |
| November | -1.2° | -8.8° | 22.5mm | 8.7 | 13 |
| December | -7.3° | -15.6° | 26.5mm | 10.9 | 8 |
January in Kostanay averages a daily high of -10.6°C with nights around -19.5°C. Expect roughly 10.1 wet days totalling 16.5mm. A hard month to visit for comfort alone.
February in Kostanay averages a daily high of -7.9°C with nights around -17.5°C. Expect roughly 8.5 wet days totalling 14.9mm. A hard month to visit for comfort alone.
March in Kostanay averages a daily high of -1.2°C with nights around -10.8°C. Expect roughly 6.6 wet days totalling 17.3mm. A hard month to visit for comfort alone.
April in Kostanay averages a daily high of 11.3°C with nights around 0.3°C. Expect roughly 6.9 wet days totalling 29.1mm. Generally workable, with some weather to plan around.
May in Kostanay averages a daily high of 21.2°C with nights around 8.2°C. Expect roughly 8.9 wet days totalling 39.3mm. Comfortable conditions for being outdoors all day.
June in Kostanay averages a daily high of 26.2°C with nights around 13.5°C. Expect roughly 8 wet days totalling 40.2mm. Comfortable conditions for being outdoors all day.
July in Kostanay averages a daily high of 27.5°C with nights around 15°C. Expect roughly 8.5 wet days totalling 51.5mm. Comfortable conditions for being outdoors all day.
August in Kostanay averages a daily high of 25.2°C with nights around 13°C. Expect roughly 9 wet days totalling 39.8mm. Comfortable conditions for being outdoors all day.
September in Kostanay averages a daily high of 19.4°C with nights around 7.4°C. Expect roughly 7 wet days totalling 27.4mm. Comfortable conditions for being outdoors all day.
October in Kostanay averages a daily high of 10.5°C with nights around 0.9°C. Expect roughly 9.5 wet days totalling 32.1mm. Demanding conditions — pack for it and plan indoor options.
November in Kostanay averages a daily high of -1.2°C with nights around -8.8°C. Expect roughly 8.7 wet days totalling 22.5mm. A hard month to visit for comfort alone.
December in Kostanay averages a daily high of -7.3°C with nights around -15.6°C. Expect roughly 10.9 wet days totalling 26.5mm. 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. Kostanay peaks at 84.
Based on 30 years of records, May–September scores highest for comfort in Kostanay, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.5°C.
July is the wettest, averaging 51.5mm of rain across roughly 8.5 wet days.
January is the coolest month, with average daily highs around -10.6°C.