Weather radar Helsinki
Real-time precipitation radar · Uusimaa · Finland
Helsinki climate table – average temperature, precipitation & sunshine hours
The climate table for Helsinki shows long-term monthly averages (2000–2023): average high and average low temperature in °C, monthly precipitation (mm), rainy days and sunshine hours per month. Data source: ERA5 reanalysis (ECMWF) via the WDTEC Climate Archive.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | -1.2° | -1.2° | 3.2° | 8.2° | 14.9° | 20.7° | 22.5° | 20.6° | 16° | 9.8° | 4.2° | -0.1° |
| Avg low (°C) | -5.8° | -5.7° | -3° | 0.8° | 6.1° | 12.1° | 14.9° | 13.7° | 9.8° | 5.2° | 0.9° | -4.3° |
| Precipitation (mm) | 76 | 48 | 34 | 47 | 47 | 58 | 93 | 98 | 66 | 64 | 60 | 58 |
| Rainy days | 15 | 9 | 9 | 9 | 9 | 11 | 14 | 15 | 10 | 13 | 13 | 13 |
| Sunshine hours | 35 | 90 | 215 | 299 | 403 | 435 | 426 | 343 | 241 | 140 | 45 | 24 |
| Humidity | 91% | 88% | 82% | 72% | 65% | 69% | 74% | 81% | 84% | 86% | 91% | 90% |
Best time to visit Helsinki
The best time to visit Helsinki is typically June. In this month the average high is 20.7°C, precipitation is 58 mm and sunshine duration is 435 hours. The annual average high is 9.8°C, total annual precipitation is 749 mm (140 rainy days/year) and annual sunshine is 2696 hours.
Frequently asked questions about the weather in Helsinki
How up to date is the weather radar for Helsinki?
The weather radar for Helsinki is updated every 5 minutes with new radar data from the OPERA composite radar. A 2-hour forecast animation is also available. Rainfall probability, wind gusts and UV index are available up to 14 days in advance.
What weather data is available for Helsinki?
Besides the rain radar, RadarWeather provides for Helsinki: rainfall probability, thunderstorm warning (CAPE index), wind gusts, UV index, air pressure, humidity, dew point, sunshine hours, snow line and a 14-day forecast based on ICON-D2, ECMWF IFS and GFS.
When are thunderstorms expected in Helsinki?
The thunderstorm potential for Helsinki is calculated from the CAPE index and lightning potential. Active storm cells and severe weather warnings are visible on the radar map in real time. Thunderstorm warnings are issued automatically as soon as storm cells are detected near Helsinki.
What is the climate like in Helsinki?
Helsinki has an annual average high of 9.8°C. The warmest month is July (avg high 22.5°C), the coldest January (avg low -5.8°C). The wettest month is August with 98 mm, the driest March with 34 mm. Total annual precipitation is 749 mm (140 rainy days). Annual sunshine is 2696 hours.
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