5-day weather forecast Helsinki Sep 15, 2026
15°Weather forecast Helsinki Tuesday Sep 15, 2026: overcast, temperature from 7 °C to 15 °C.
Precipitation probability 30%. Wind up to 2.89 m/s (gusts 4.69 m/s). Air humidity 59–89%, atmospheric pressure 764–767 mm Hg, UV index up to 4.
5 days at a glance — tap a day to open it
Sunrise 06:48
Sunset 19:42
Sunset 19:42
Waxing Crescent23% illuminated
Moonrise 13:34 · Moonset 19:36
Moonrise 13:34 · Moonset 19:36
Chart
Table
Tue, Sep 15, 2026
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Overcast | 10 °C | 25% | 100% | 82% | 765 mm Hg | WNW 284° 2.19 (3.5) m/s | 0 |
| 01:00 | Overcast | 8 °C | 25% | 100% | 82% | 764 mm Hg | NNW 343° 2.11 (2.5) m/s | 0 |
| 02:00 | Overcast | 8 °C | 25% | 100% | 82% | 764 mm Hg | N 356° 1.81 (2) m/s | 0 |
| 03:00 | Overcast | 8 °C | 25% | 100% | 82% | 764 mm Hg | N 353° 1.39 (1.53) m/s | 0 |
| 04:00 | Overcast | 8 °C | 25% | 100% | 81% | 764 mm Hg | NNW 347° 1.31 (1.31) m/s | 0 |
| 05:00 | Overcast | 8 °C | 25% | 100% | 81% | 764 mm Hg | NNW 341° 1.11 (1.19) m/s | 0 |
| 06:00 | Overcast | 8 °C | 24% | 100% | 80% | 764 mm Hg | NNW 336° 0.69 (4.69) m/s | 0 |
| 07:00 | Overcast | 7 °C | 30% | 100% | 89% | 766 mm Hg | NNW 332° 1.39 (1.39) m/s | 0 |
| 08:00 | Overcast | 8 °C | 27% | 100% | 84% | 766 mm Hg | NNW 329° 1 (1.11) m/s | 0.1 |
| 09:00 | Overcast | 10 °C | 22% | 100% | 77% | 767 mm Hg | WNW 303° 0.81 (1.22) m/s | 0.4 |
| 10:00 | Overcast | 11 °C | 19% | 100% | 71% | 767 mm Hg | W 259° 0.39 (0.89) m/s | 0.8 |
| 11:00 | Overcast | 12 °C | 17% | 100% | 67% | 766 mm Hg | SW 226° 1.11 (1.5) m/s | 1.4 |
| 12:00 | Overcast | 13 °C | 16% | 100% | 65% | 766 mm Hg | SSW 211° 1.5 (2.03) m/s | 2 |
| 13:00 | Overcast | 13 °C | 15% | 100% | 62% | 766 mm Hg | SSW 209° 1.89 (2.53) m/s | 2.3 |
| 14:00 |  Cloudy | 14 °C | 10% | 74% | 60% | 766 mm Hg | SSW 206° 2.19 (2.64) m/s | 2.3 |
| 15:00 | Cloudy | 15 °C | 11% | 83% | 59% | 766 mm Hg | SSW 200° 2.69 (3) m/s | 1.9 |
| 16:00 |  Sunny | 14 °C | 4% | 14% | 60% | 765 mm Hg | SSW 195° 2.89 (3.42) m/s | 4 |
| 17:00 | Sunny | 14 °C | 4% | 5% | 61% | 765 mm Hg | SSW 192° 2.81 (3.42) m/s | 4 |
| 18:00 | Sunny | 14 °C | 5% | 5% | 66% | 765 mm Hg | S 187° 2.31 (3.31) m/s | 4 |
| 19:00 | Sunny | 12 °C | 8% | 5% | 76% | 765 mm Hg | S 175° 2 (2.69) m/s | 4 |
| 20:00 |  Clear | 10 °C | 10% | 5% | 81% | 765 mm Hg | S 170° 1.89 (2) m/s | 0 |
| 21:00 | Clear | 10 °C | 11% | 17% | 82% | 765 mm Hg | SSE 163° 1.5 (1.81) m/s | 0 |
| 22:00 | Overcast | 11 °C | 16% | 45% | 84% | 765 mm Hg | SSE 160° 1.89 (2.81) m/s | 0 |
| 23:00 | Clear | 11 °C | 22% | 72% | 87% | 764 mm Hg | SSE 157° 2.19 (3.89) m/s | 0 |
Tue, Sep 15, 2026
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.