5-day weather forecast Helsinki 23-08-2026
Weather forecast Helsinki Sunday, August 23 23.08.2026: overcast, temperature from 11 °C to 19 °C.
Precipitation probability 31%. Wind up to 4.5 m/s (gusts 7.42 m/s). Air humidity 56–93%, atmospheric pressure 758–759 mm Hg, UV index up to 2.1.
5 days at a glance — tap a day to open it
Sunrise 05:53
Sunset 20:52
Sunset 20:52
Waxing Gibbous86% illuminated
Moonrise 20:18 · Moonset Does not set today
Moonrise 20:18 · Moonset Does not set today
Chart
Table
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Overcast | 13 °C | 23% | 100% | 78% | 758 mm Hg | WNW 284° 2.81 (7.42) m/s | 0 |
| 01:00 | Overcast | 12 °C | 26% | 100% | 83% | 758 mm Hg | WNW 285° 2.81 (6.72) m/s | 0 |
| 02:00 | Overcast | 12 °C | 27% | 100% | 85% | 758 mm Hg | W 280° 2.61 (6.11) m/s | 0 |
| 03:00 |  Cloudy | 12 °C | 24% | 81% | 88% | 758 mm Hg | W 277° 2.69 (6.11) m/s | 0 |
| 04:00 | Overcast | 11 °C | 31% | 99% | 92% | 758 mm Hg | WNW 287° 2.5 (5.72) m/s | 0 |
| 05:00 | Overcast | 11 °C | 30% | 93% | 93% | 758 mm Hg | W 281° 2.19 (4.72) m/s | 0 |
| 06:00 |  Cloudy | 11 °C | 25% | 74% | 92% | 758 mm Hg | W 268° 2.31 (4) m/s | 0 |
| 07:00 |  Overcast | 11 °C | 27% | 93% | 88% | 758 mm Hg | W 264° 2.31 (5.11) m/s | 0.1 |
| 08:00 | Overcast | 13 °C | 22% | 100% | 78% | 758 mm Hg | W 262° 2.69 (6.22) m/s | 0.2 |
| 09:00 | Overcast | 15 °C | 19% | 100% | 72% | 758 mm Hg | WSW 252° 3.61 (7.22) m/s | 0.5 |
| 10:00 |  Patchy rain possible | 15 °C | 21% (0.01 mm/hr) | 100% | 73% | 758 mm Hg | WSW 244° 4.19 (7) m/s | 0.9 |
| 11:00 | Patchy rain possible | 15 °C | 21% (0.02 mm/hr) | 100% | 72% | 758 mm Hg | WSW 247° 4.5 (6.61) m/s | 1.4 |
| 12:00 | Overcast | 16 °C | 18% | 99% | 70% | 758 mm Hg | WSW 251° 4.39 (6.61) m/s | 1.9 |
| 13:00 | Cloudy | 17 °C | 14% | 86% | 66% | 758 mm Hg | WSW 251° 4.31 (6.42) m/s | 2.1 |
| 14:00 | Overcast | 18 °C | 15% | 99% | 61% | 758 mm Hg | WSW 248° 4.31 (5.83) m/s | 1.9 |
| 15:00 | Overcast | 18 °C | 13% | 99% | 57% | 758 mm Hg | WSW 243° 4.11 (5.5) m/s | 1.2 |
| 16:00 | Cloudy | 19 °C | 11% | 82% | 56% | 758 mm Hg | SW 233° 3.89 (5.42) m/s | 0.6 |
| 17:00 | Cloudy | 19 °C | 11% | 86% | 57% | 758 mm Hg | SW 227° 4.11 (5.11) m/s | 0.4 |
| 18:00 | Cloudy | 18 °C | 12% | 81% | 62% | 758 mm Hg | SW 229° 4 (5.14) m/s | 0.2 |
| 19:00 | Cloudy | 17 °C | 13% | 79% | 67% | 758 mm Hg | SW 231° 3.61 (6.83) m/s | 0.1 |
| 20:00 | Cloudy | 16 °C | 14% | 70% | 71% | 758 mm Hg | WSW 241° 2.81 (5.72) m/s | 0 |
| 21:00 |  Partly cloudy | 15 °C | 12% | 46% | 76% | 758 mm Hg | WNW 283° 2.39 (2.92) m/s | 0 |
| 22:00 | Cloudy | 14 °C | 21% | 87% | 80% | 758 mm Hg | NW 311° 2.5 (3.53) m/s | 0 |
| 23:00 | Overcast | 13 °C | 25% | 100% | 82% | 759 mm Hg | NW 310° 2.31 (3.33) m/s | 0 |
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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.