5-day weather forecast Helsinki 21-04-2026

Weather forecast Helsinki today 21.04.2026: sunny, temperature from 3 °C to 12 °C.

No precipitation expected. Wind up to 3.11 m/s (gusts 6.5 m/s). Air humidity 38–61%, atmospheric pressure 764–769 mm Hg, UV index up to 3.

Sunrise 05:46
Sunset 20:54
Waxing Crescent17% illuminated
Moonrise 06:14 · Moonset 03:06
Chart
Table
Tue, Apr 21, 2026
TemperatureRain chanceCloud coverHumidityPressureWindUV Index
00:00Weather
Clear
5 °C0% 4%54%769 mm HgN 10° 1.89 (4) m/s0
01:00Weather
Clear
5 °C0% 3%55%769 mm HgN 7° 2.39 (5.03) m/s0
02:00Weather
Clear
5 °C0% 3%56%769 mm HgN 357° 2.61 (5.47) m/s0
03:00Weather
Clear
4 °C0% 2%58%769 mm HgN 349° 2.69 (5.67) m/s0
04:00Weather
Clear
4 °C0% 2%59%769 mm HgNNW 342° 2.89 (6.08) m/s0
05:00Weather
Clear
4 °C0% 3%61%769 mm HgNNW 340° 3.11 (6.5) m/s0
06:00Weather
Sunny
3 °C0% 3%61%769 mm HgNNW 342° 3.11 (6.5) m/s0
07:00Weather
Sunny
4 °C0% 3%59%768 mm HgNNW 343° 2.89 (6.08) m/s0.2
08:00Weather
Sunny
6 °C0% 1%53%768 mm HgNNW 343° 2.89 (5.36) m/s0.4
09:00Weather
Sunny
7 °C0% 0%47%768 mm HgNNW 346° 3.11 (5) m/s0.9
10:00Weather
Sunny
9 °C0% 0%42%768 mm HgNNW 343° 3 (4.64) m/s1.5
11:00Weather
Sunny
10 °C0% 2%38%767 mm HgNNW 344° 2.81 (4.33) m/s2.2
12:00Weather
Sunny
11 °C0% 10%38%767 mm HgNNW 342° 2.39 (3.83) m/s2.7
13:00Weather
Sunny
11 °C0% 18%38%767 mm HgNNW 329° 1.89 (3) m/s3
14:00Weather
Sunny
12 °C0% 8%40%767 mm HgNW 309° 1.69 (2.72) m/s3
15:00Weather
Sunny
12 °C0% 5%41%766 mm HgWNW 292° 1.89 (3.08) m/s2.6
16:00Weather
Sunny
12 °C0% 8%42%765 mm HgWNW 294° 2.31 (3.78) m/s2
17:00Weather
Sunny
12 °C0% 8%42%765 mm HgWNW 300° 2.5 (4.28) m/s1.3
18:00Weather
Partly cloudy
12 °C0% 27%42%764 mm HgNW 318° 2.5 (4.58) m/s0.7
19:00Weather
Sunny
12 °C0% 11%43%764 mm HgNNW 338° 2.31 (4.47) m/s0.3
20:00Weather
Sunny
11 °C0% 11%45%764 mm HgN 358° 2.11 (4.42) m/s0.1
21:00Weather
Partly cloudy
9 °C0% 33%49%764 mm HgNNE 28° 2.19 (4.61) m/s0
22:00Weather
Clear
8 °C0% 17%51%764 mm HgN 11° 1.81 (3.78) m/s0
23:00Weather
Clear
8 °C0% 2%52%764 mm HgNNW 341° 2 (4.19) m/s0
Tue, Apr 21, 2026

Frequently asked questions about the weather in Helsinki

Today in Helsinki the temperature ranges from 3 °C to 12 °C, wind up to 3.11 m/s. Check the detailed hourly forecast above for more information.

The precipitation probability in Helsinki today is 0%. View the full multi-day forecast above to see the rain chances for each upcoming day.

The wind speed in Helsinki today reaches up to 3.11 m/s with gusts up to 6.5 m/s. Check the detailed wind chart above for hourly wind data.

The air humidity in Helsinki today ranges from 38% to 61%. View the humidity chart above for hourly details.

The UV index in Helsinki today reaches up to 3. Check the UV index chart above for hourly values throughout the day.

The atmospheric pressure in Helsinki today ranges from 764 to 769 mm Hg. View the pressure chart above for hourly readings.

Cloud cover in Helsinki today reaches up to 33%. Check the cloud cover chart above for hourly details throughout the day.

Helsinki on the map

Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.