| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -0.2° | -5.3° | 85.3mm | 13.5 | 7 |
| February | 1.2° | -4.9° | 62mm | 11.6 | 11 |
| March | 5.1° | -2.6° | 57.5mm | 9.9 | 26 |
| April | 10.4° | 1.2° | 60.5mm | 10.1 | 48 |
| May | 15.8° | 6° | 79.5mm | 12.4 | 62 |
| June | 19.8° | 10.3° | 91.9mm | 12.6 | 74 |
| July | 21.6° | 12.6° | 100.7mm | 14 | 72 |
| August | 20.6° | 12° | 112.8mm | 13.1 | 74 |
| September | 16.1° | 8.6° | 101.3mm | 11.7 | 64 |
| October | 9.7° | 3.9° | 117.9mm | 13.6 | 40 |
| November | 4.2° | -0.3° | 108.4mm | 14.7 | 17 |
| December | 0.3° | -4.3° | 77.6mm | 14.2 | 7 |
January in Asker averages a daily high of -0.2°C with nights around -5.3°C. Expect roughly 13.5 wet days totalling 85.3mm. A hard month to visit for comfort alone.
February in Asker averages a daily high of 1.2°C with nights around -4.9°C. Expect roughly 11.6 wet days totalling 62mm. A hard month to visit for comfort alone.
March in Asker averages a daily high of 5.1°C with nights around -2.6°C. Expect roughly 9.9 wet days totalling 57.5mm. A hard month to visit for comfort alone.
April in Asker averages a daily high of 10.4°C with nights around 1.2°C. Expect roughly 10.1 wet days totalling 60.5mm. Demanding conditions — pack for it and plan indoor options.
May in Asker averages a daily high of 15.8°C with nights around 6°C. Expect roughly 12.4 wet days totalling 79.5mm. Generally workable, with some weather to plan around.
June in Asker averages a daily high of 19.8°C with nights around 10.3°C. Expect roughly 12.6 wet days totalling 91.9mm. Generally workable, with some weather to plan around.
July in Asker averages a daily high of 21.6°C with nights around 12.6°C. Expect roughly 14 wet days totalling 100.7mm. Generally workable, with some weather to plan around.
August in Asker averages a daily high of 20.6°C with nights around 12°C. Expect roughly 13.1 wet days totalling 112.8mm. Generally workable, with some weather to plan around.
September in Asker averages a daily high of 16.1°C with nights around 8.6°C. Expect roughly 11.7 wet days totalling 101.3mm. Generally workable, with some weather to plan around.
October in Asker averages a daily high of 9.7°C with nights around 3.9°C. Expect roughly 13.6 wet days totalling 117.9mm. Demanding conditions — pack for it and plan indoor options.
November in Asker averages a daily high of 4.2°C with nights around -0.3°C. Expect roughly 14.7 wet days totalling 108.4mm. A hard month to visit for comfort alone.
December in Asker averages a daily high of 0.3°C with nights around -4.3°C. Expect roughly 14.2 wet days totalling 77.6mm. 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. Asker peaks at 74.
Based on 30 years of records, June–August scores highest for comfort in Asker, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 21.6°C.
October is the wettest, averaging 117.9mm of rain across roughly 13.6 wet days.
January is the coolest month, with average daily highs around -0.2°C.