5-day weather forecast Helsinki 25-08-2026
Weather forecast Helsinki Tuesday, August 25 25.08.2026: overcast, temperature from 10 °C to 20 °C.
Precipitation probability 31%. Wind up to 5.31 m/s (gusts 11.92 m/s). Air humidity 49–92%, atmospheric pressure 758–764 mm Hg, UV index up to 5.
5 days at a glance — tap a day to open it
Sunrise 05:58
Sunset 20:46
Sunset 20:46
Full Moon97% illuminated
Moonrise 20:28 · Moonset 02:00
Moonrise 20:28 · Moonset 02:00
Chart
Table
Tue, Aug 25, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Overcast | 12 °C | 27% | 100% | 86% | 758 mm Hg | NW 318° 4.19 (10.61) m/s | 0 |
| 01:00 | Overcast | 12 °C | 28% | 100% | 87% | 758 mm Hg | NW 315° 4.31 (10.53) m/s | 0 |
| 02:00 |  Partly cloudy | 11 °C | 19% | 59% | 86% | 758 mm Hg | NW 317° 4.5 (10.69) m/s | 0 |
| 03:00 | Overcast | 11 °C | 28% | 100% | 86% | 758 mm Hg | NW 316° 4.5 (10.61) m/s | 0 |
| 04:00 |  Clear | 10 °C | 15% | 9% | 91% | 761 mm Hg | NW 318° 4 (10.81) m/s | 0 |
| 05:00 | Overcast | 10 °C | 31% | 100% | 92% | 761 mm Hg | NW 317° 4.19 (11.19) m/s | 0 |
| 06:00 |  Overcast | 12 °C | 26% | 100% | 84% | 759 mm Hg | NW 320° 4.69 (10.61) m/s | 0 |
| 07:00 |  Sunny | 11 °C | 12% | 7% | 86% | 761 mm Hg | NW 319° 4.31 (11.92) m/s | 0.1 |
| 08:00 | Sunny | 12 °C | 10% | 5% | 82% | 762 mm Hg | NW 325° 4.19 (11.33) m/s | 0.4 |
| 09:00 | Overcast | 13 °C | 25% | 100% | 82% | 760 mm Hg | NNW 328° 4.69 (10.03) m/s | 0.9 |
| 10:00 | Sunny | 15 °C | 6% | 5% | 68% | 762 mm Hg | NNW 337° 4.69 (7.81) m/s | 1.6 |
| 11:00 |  Partly cloudy | 16 °C | 8% | 41% | 65% | 762 mm Hg | NNW 341° 4.69 (7.19) m/s | 2.2 |
| 12:00 |  Patchy rain possible | 15 °C | 18% (0.01 mm/hr) | 100% | 68% | 761 mm Hg | NNW 334° 5.31 (8.42) m/s | 2.4 |
| 13:00 |  Cloudy | 17 °C | 10% | 66% | 61% | 763 mm Hg | NNW 345° 4.61 (6.81) m/s | 3.2 |
| 14:00 | Sunny | 18 °C | 4% | 18% | 58% | 764 mm Hg | NNW 337° 4.39 (6.5) m/s | 3 |
| 15:00 | Patchy rain possible | 17 °C | 15% (0.02 mm/hr) | 94% | 60% | 761 mm Hg | NNW 342° 5.31 (8.42) m/s | 1.9 |
| 16:00 | Partly cloudy | 20 °C | 5% | 50% | 49% | 764 mm Hg | NNW 337° 3.19 (5.83) m/s | 5 |
| 17:00 | Overcast | 20 °C | 12% | 100% | 51% | 764 mm Hg | N 352° 2.81 (5.42) m/s | 4 |
| 18:00 | Patchy rain possible | 17 °C | 21% (0.1 mm/hr) | 94% | 62% | 762 mm Hg | NNW 343° 3.81 (7.72) m/s | 4 |
| 19:00 | Patchy rain possible | 17 °C | 19% (0.02 mm/hr) | 100% | 68% | 764 mm Hg | NW 316° 1.61 (3.03) m/s | 4 |
| 20:00 | Overcast | 16 °C | 19% | 100% | 70% | 764 mm Hg | NNW 329° 2.19 (4.03) m/s | 4 |
| 21:00 |  Patchy rain possible | 15 °C | 22% (0.03 mm/hr) | 100% | 73% | 764 mm Hg | NNW 330° 3 (8.64) m/s | 0 |
| 22:00 | Clear | 14 °C | 15% | 70% | 76% | 764 mm Hg | NNW 331° 3.19 (9.31) m/s | 0 |
| 23:00 | Patchy rain possible | 13 °C | 12% | 39% | 79% | 764 mm Hg | NNW 332° 3.39 (9.89) m/s | 0 |
Tue, Aug 25, 2026
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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.