| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -10.5° | -20.5° | 16.3mm | 9.1 | 12 |
| February | -7.4° | -18.2° | 14.8mm | 7.8 | 14 |
| March | 1° | -10.2° | 18.9mm | 8.1 | 14 |
| April | 14.9° | 0.5° | 21.7mm | 6.9 | 68 |
| May | 22.5° | 7.7° | 27.4mm | 8.6 | 83 |
| June | 27.5° | 13.1° | 33.6mm | 8.7 | 81 |
| July | 28.6° | 15° | 45.4mm | 9.7 | 74 |
| August | 27.3° | 12.4° | 16.2mm | 6.7 | 85 |
| September | 20.8° | 5.6° | 14.2mm | 5 | 90 |
| October | 12.2° | 0° | 17.7mm | 6.6 | 59 |
| November | 1.1° | -8.5° | 24.9mm | 9.2 | 12 |
| December | -7.3° | -15.6° | 19.8mm | 11.9 | 6 |
January in Semey averages a daily high of -10.5°C with nights around -20.5°C. Expect roughly 9.1 wet days totalling 16.3mm. A hard month to visit for comfort alone.
February in Semey averages a daily high of -7.4°C with nights around -18.2°C. Expect roughly 7.8 wet days totalling 14.8mm. A hard month to visit for comfort alone.
March in Semey averages a daily high of 1°C with nights around -10.2°C. Expect roughly 8.1 wet days totalling 18.9mm. A hard month to visit for comfort alone.
April in Semey averages a daily high of 14.9°C with nights around 0.5°C. Expect roughly 6.9 wet days totalling 21.7mm. Generally workable, with some weather to plan around.
May in Semey averages a daily high of 22.5°C with nights around 7.7°C. Expect roughly 8.6 wet days totalling 27.4mm. Comfortable conditions for being outdoors all day.
June in Semey averages a daily high of 27.5°C with nights around 13.1°C. Expect roughly 8.7 wet days totalling 33.6mm. Comfortable conditions for being outdoors all day.
July in Semey averages a daily high of 28.6°C with nights around 15°C. Expect roughly 9.7 wet days totalling 45.4mm. Generally workable, with some weather to plan around.
August in Semey averages a daily high of 27.3°C with nights around 12.4°C. Expect roughly 6.7 wet days totalling 16.2mm. Comfortable conditions for being outdoors all day.
September in Semey averages a daily high of 20.8°C with nights around 5.6°C. Expect roughly 5 wet days totalling 14.2mm. Comfortable conditions for being outdoors all day.
October in Semey averages a daily high of 12.2°C with nights around 0°C. Expect roughly 6.6 wet days totalling 17.7mm. Generally workable, with some weather to plan around.
November in Semey averages a daily high of 1.1°C with nights around -8.5°C. Expect roughly 9.2 wet days totalling 24.9mm. A hard month to visit for comfort alone.
December in Semey averages a daily high of -7.3°C with nights around -15.6°C. Expect roughly 11.9 wet days totalling 19.8mm. 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. Semey peaks at 90.
Based on 30 years of records, August–September scores highest for comfort in Semey, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 28.6°C.
July is the wettest, averaging 45.4mm of rain across roughly 9.7 wet days.
January is the coolest month, with average daily highs around -10.5°C.