| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 0.4° | -4.9° | — | — | 29 |
| February | 1.4° | -4.9° | — | — | 29 |
| March | 5.1° | -3.2° | — | — | 39 |
| April | 11.1° | 0.8° | — | — | 64 |
| May | 16.1° | 5.4° | 61.8mm | 5 | 78 |
| June | 20.4° | 10° | — | — | 94 |
| July | 22.4° | 12.6° | — | — | 94 |
| August | 21.4° | 12.2° | — | — | 94 |
| September | 16.9° | 8.3° | — | — | 84 |
| October | 10.5° | 4.1° | — | — | 64 |
| November | 4.6° | -0.2° | — | — | 41 |
| December | 1° | -4.2° | — | — | 30 |
January in Karlstad averages a daily high of 0.4°C with nights around -4.9°C. A hard month to visit for comfort alone.
February in Karlstad averages a daily high of 1.4°C with nights around -4.9°C. A hard month to visit for comfort alone.
March in Karlstad averages a daily high of 5.1°C with nights around -3.2°C. Demanding conditions — pack for it and plan indoor options.
April in Karlstad averages a daily high of 11.1°C with nights around 0.8°C. Generally workable, with some weather to plan around.
May in Karlstad averages a daily high of 16.1°C with nights around 5.4°C. Expect roughly 5 wet days totalling 61.8mm. Comfortable conditions for being outdoors all day.
June in Karlstad averages a daily high of 20.4°C with nights around 10°C. Comfortable conditions for being outdoors all day.
July in Karlstad averages a daily high of 22.4°C with nights around 12.6°C. Comfortable conditions for being outdoors all day.
August in Karlstad averages a daily high of 21.4°C with nights around 12.2°C. Comfortable conditions for being outdoors all day.
September in Karlstad averages a daily high of 16.9°C with nights around 8.3°C. Comfortable conditions for being outdoors all day.
October in Karlstad averages a daily high of 10.5°C with nights around 4.1°C. Generally workable, with some weather to plan around.
November in Karlstad averages a daily high of 4.6°C with nights around -0.2°C. Demanding conditions — pack for it and plan indoor options.
December in Karlstad averages a daily high of 1°C with nights around -4.2°C. 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. Karlstad peaks at 94.
Based on 30 years of records, June–August scores highest for comfort in Karlstad, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 22.4°C.
May is the wettest, averaging 61.8mm of rain across roughly 5 wet days.
January is the coolest month, with average daily highs around 0.4°C.