Climate averages 1991–2020
Helsinki weather
in July.
A mild, moderately wet month: the warmest and one of the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Helsinki: daytime highs average 20.8°C and nights cool to about 14.6°C. By daytime temperature it is the warmest month of the year.
Expect about 76 mm of rain on roughly 12 days, which makes July a moderately wet month (one of the wettest months of the year). Daylight, from sunrise to sunset, lasts about 18 h 03 min on an average July day.
The nearest other city in this atlas is Vantaa (15 km away). In July its highs average 21.9°C, 1.1°C warmer than Helsinki, with 76 mm of rain.
Among the 13 cities listed in Finland, Helsinki ranks 6th of 13 for the warmest July highs and joint 5th of 13 for the driest July (rainfall, lowest first). The mean July high of those 13 cities is 20.8°C; Helsinki is level with that mean.
From July to August, average highs fall by 1.2°C to 19.6°C, and monthly rainfall stays at 76 mm.
The annual picture
July in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Helsinki climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -2.1°C-6.0°C | -6.0°C | 48 | 10.9 | 6.87 h |
| February | -2.9°C-7.1°C | -7.1°C | 41 | 9.3 | 9.19 h |
| March | 0.7°C-4.6°C | -4.6°C | 37 | 8.5 | 11.712 h |
| April | 6.9°C0.3°C | 0.3°C | 37 | 8.7 | 14.515 h |
| May | 13.1°C6.0°C | 6.0°C | 44 | 8.9 | 17.217 h |
| June | 17.3°C10.8°C | 10.8°C | 72 | 11.7 | 18.819 h |
| July, selected | 20.8°C14.6°C | 14.6°C | 76 | 11.9 | 18.118 h |
| August | 19.6°C13.9°C | 13.9°C | 76 | 12.3 | 15.716 h |
| September | 14.6°C9.8°C | 9.8°C | 57 | 10.4 | 13.013 h |
| October | 8.1°C4.4°C | 4.4°C | 59 | 11.1 | 10.210 h |
| November | 3.3°C0.3°C | 0.3°C | 59 | 11.5 | 7.68 h |
| December | 0.1°C-3.2°C | -3.2°C | 55 | 12.2 | 6.06 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Vantaa in JulyFinland · 15 kmHigh 21.9°C · Low 14.2°C · 76 mm rain
- Espoo in JulyFinland · 16 kmHigh 20.6°C · Low 14.7°C · 69 mm rain
- Tallinn in JulyEstonia · 82 kmHigh 21.5°C · Low 14.5°C · 68 mm rain
- Lahti in JulyFinland · 99 kmHigh 21.2°C · Low 13.9°C · 76 mm rain
- Kouvola in JulyFinland · 124 kmHigh 21.5°C · Low 14.1°C · 66 mm rain
- Turku in JulyFinland · 150 kmHigh 21.4°C · Low 13.6°C · 85 mm rain
- Tampere in JulyFinland · 160 kmHigh 20.7°C · Low 14.0°C · 83 mm rain
- Lappeenranta in JulyFinland · 203 kmHigh 21.5°C · Low 14.2°C · 73 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Helsinki) is explained once on the Helsinki year overview and on the Sources, method and limits page.
Vantaa lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.