| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -1.1° | -6.9° | — | — | 26 |
| February | -1.3° | -7.7° | — | — | 24 |
| March | 2.1° | -5.9° | — | — | 27 |
| April | 9.3° | -0.2° | — | — | 56 |
| May | 15.4° | 4.3° | — | — | 79 |
| June | 20.5° | 10° | — | — | 94 |
| July | 22.6° | 13.1° | — | — | 94 |
| August | 21.2° | 11.8° | — | — | 94 |
| September | 16.1° | 7.2° | — | — | 82 |
| October | 9.4° | 3.1° | — | — | 60 |
| November | 4° | -0.8° | — | — | 39 |
| December | 0.5° | -4.8° | — | — | 29 |
January in Vantaa averages a daily high of -1.1°C with nights around -6.9°C. A hard month to visit for comfort alone.
February in Vantaa averages a daily high of -1.3°C with nights around -7.7°C. A hard month to visit for comfort alone.
March in Vantaa averages a daily high of 2.1°C with nights around -5.9°C. A hard month to visit for comfort alone.
April in Vantaa averages a daily high of 9.3°C with nights around -0.2°C. Generally workable, with some weather to plan around.
May in Vantaa averages a daily high of 15.4°C with nights around 4.3°C. Comfortable conditions for being outdoors all day.
June in Vantaa averages a daily high of 20.5°C with nights around 10°C. Comfortable conditions for being outdoors all day.
July in Vantaa averages a daily high of 22.6°C with nights around 13.1°C. Comfortable conditions for being outdoors all day.
August in Vantaa averages a daily high of 21.2°C with nights around 11.8°C. Comfortable conditions for being outdoors all day.
September in Vantaa averages a daily high of 16.1°C with nights around 7.2°C. Comfortable conditions for being outdoors all day.
October in Vantaa averages a daily high of 9.4°C with nights around 3.1°C. Generally workable, with some weather to plan around.
November in Vantaa averages a daily high of 4°C with nights around -0.8°C. Demanding conditions — pack for it and plan indoor options.
December in Vantaa averages a daily high of 0.5°C with nights around -4.8°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. Vantaa peaks at 94.
Based on 30 years of records, June–August scores highest for comfort in Vantaa, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 22.6°C.
January is the wettest, averaging —mm of rain across roughly — wet days.
February is the coolest month, with average daily highs around -1.3°C.