5-day weather forecast Helsinki 18-05-2026
Weather forecast Helsinki today 18.05.2026: sunny, temperature from 5 °C to 17 °C.
Precipitation probability 61%. Wind up to 2.69 m/s (gusts 5.25 m/s). Air humidity 39–90%, atmospheric pressure 764–766 mm Hg, UV index up to 3.6.
Sunset 22:00
Moonrise 04:10 · Moonset 00:29
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Clear | 7 °C | 0% | 0% | 86% | 765 mm Hg | W 266° 2.31 (4.83) m/s | 0 |
| 01:00 | Clear | 6 °C | 0% | 0% | 88% | 765 mm Hg | W 280° 2 (4.19) m/s | 0 |
| 02:00 | Clear | 6 °C | 0% | 1% | 89% | 765 mm Hg | WNW 302° 2.19 (4.61) m/s | 0 |
| 03:00 | Clear | 6 °C | 0% | 2% | 90% | 765 mm Hg | NW 317° 2.19 (4.61) m/s | 0 |
| 04:00 | Clear | 5 °C | 0% | 3% | 90% | 766 mm Hg | NNW 327° 2.11 (4.42) m/s | 0 |
| 05:00 |  Sunny | 5 °C | 0% | 4% | 90% | 766 mm Hg | N 349° 1.89 (4) m/s | 0 |
| 06:00 | Sunny | 6 °C | 0% | 5% | 84% | 766 mm Hg | N 1° 1.89 (3.83) m/s | 0.1 |
| 07:00 | Sunny | 8 °C | 0% | 6% | 76% | 766 mm Hg | N 5° 2.19 (3.78) m/s | 0.4 |
| 08:00 | Sunny | 9 °C | 0% | 2% | 68% | 766 mm Hg | NNE 20° 2.11 (3.25) m/s | 0.9 |
| 09:00 | Sunny | 11 °C | 0% | 16% | 61% | 766 mm Hg | NE 40° 1.89 (2.83) m/s | 1.5 |
| 10:00 |  Overcast | 12 °C | 0% | 100% | 55% | 766 mm Hg | NE 55° 2 (2.92) m/s | 2.4 |
| 11:00 | Overcast | 13 °C | 0% | 100% | 51% | 766 mm Hg | ENE 78° 1.89 (2.78) m/s | 3 |
| 12:00 | Sunny | 14 °C | 0% | 13% | 48% | 766 mm Hg | E 98° 1.61 (2.31) m/s | 3.3 |
| 13:00 | Sunny | 15 °C | 0% | 14% | 46% | 766 mm Hg | ESE 109° 1.5 (2.28) m/s | 3.6 |
| 14:00 | Sunny | 15 °C | 0% | 14% | 44% | 765 mm Hg | ESE 110° 1.19 (1.81) m/s | 3.4 |
| 15:00 | Sunny | 16 °C | 0% | 17% | 42% | 765 mm Hg | ESE 114° 2.19 (3.44) m/s | 2.6 |
| 16:00 |  Partly cloudy | 15 °C | 0% | 26% | 45% | 765 mm Hg | SE 125° 1.89 (3.28) m/s | 1.3 |
| 17:00 | Partly cloudy | 15 °C | 0% | 48% | 47% | 764 mm Hg | SE 131° 2.39 (4.47) m/s | 0.4 |
| 18:00 |  Cloudy | 13 °C | 0% | 70% | 55% | 764 mm Hg | SSE 156° 2.69 (5.25) m/s | 0.3 |
| 19:00 | Partly cloudy | 12 °C | 0% | 53% | 58% | 764 mm Hg | SSE 167° 0.61 (1.25) m/s | 0.3 |
| 20:00 | Cloudy | 12 °C | 0% | 82% | 58% | 764 mm Hg | N 10° 0.5 (1.06) m/s | 0.1 |
| 21:00 |  Patchy rain possible | 12 °C | 61% (0.01 mm/hr) | 100% | 57% | 764 mm Hg | NNE 13° 1.81 (3.78) m/s | 0 |
| 22:00 |  Light drizzle | 17 °C | 100% (0.27 mm/hr) | 0% | 39% | 764 mm Hg | ENE 62° 2 (4.14) m/s | 0 |
| 23:00 | Light drizzle | 10 °C | 100% (0.58 mm/hr) | 100% | 75% | 764 mm Hg | NNE 33° 1.61 (3.22) m/s | 0 |
Frequently asked questions about the weather in Helsinki
Today in Helsinki the temperature ranges from 5 °C to 17 °C, wind up to 2.69 m/s. Check the detailed hourly forecast above for more information.
The precipitation probability in Helsinki today is 61%. 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 2.69 m/s with gusts up to 5.25 m/s. Check the detailed wind chart above for hourly wind data.
The air humidity in Helsinki today ranges from 39% to 90%. View the humidity chart above for hourly details.
The UV index in Helsinki today reaches up to 3.6. Check the UV index chart above for hourly values throughout the day.
The atmospheric pressure in Helsinki today ranges from 764 to 766 mm Hg. View the pressure chart above for hourly readings.
Cloud cover in Helsinki today reaches up to 100%. 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.