5-day weather forecast Helsinki Sep 13, 2026
17°Weather forecast Helsinki Sunday Sep 13, 2026: overcast, temperature from 11 °C to 17 °C.
Precipitation probability 52%. Wind up to 4.19 m/s (gusts 7.31 m/s). Air humidity 61–98%, atmospheric pressure 756–758 mm Hg, UV index up to 1.9.
Weather Alerts
Yellow heavy rain warning: Locally in the southern part of the country, Thu 15.00 - 23.00
Heavy rain warning
Heavy rain warning: From the afternoon on heavy rain of more than 20 mm per hour can be expected.
5 days at a glance — tap a day to open it
Sunrise 06:43
Sunset 19:48
Sunset 19:48
Waxing Crescent8% illuminated
Moonrise 10:06 · Moonset 19:33
Moonrise 10:06 · Moonset 19:33
Chart
Table
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Light rain shower | 12 °C | 52% (0.24 mm/hr) | 98% | 98% | 758 mm Hg | SE 135° 1.11 (1.11) m/s | 0 |
| 01:00 |  Fog | 12 °C | 47% (0.05 mm/hr) | 100% | 97% | 758 mm Hg | SSE 153° 1.19 (1.22) m/s | 0 |
| 02:00 |  Mist | 12 °C | 40% (0.01 mm/hr) | 100% | 96% | 758 mm Hg | S 177° 1.19 (1.19) m/s | 0 |
| 03:00 | Mist | 12 °C | 44% (0.05 mm/hr) | 99% | 95% | 757 mm Hg | S 185° 1.19 (1.31) m/s | 0 |
| 04:00 |  Overcast | 12 °C | 32% | 100% | 93% | 757 mm Hg | SSW 199° 1.11 (1.14) m/s | 0 |
| 05:00 | Overcast | 12 °C | 31% | 100% | 93% | 756 mm Hg | WSW 245° 1.11 (1.11) m/s | 0 |
| 06:00 | Overcast | 12 °C | 32% | 99% | 94% | 756 mm Hg | W 268° 1.81 (2.14) m/s | 0 |
| 07:00 |  Mist | 11 °C | 38% | 100% | 94% | 756 mm Hg | W 274° 1.81 (2) m/s | 0 |
| 08:00 | Overcast | 12 °C | 31% | 100% | 92% | 756 mm Hg | W 272° 1.61 (2.22) m/s | 0.1 |
| 09:00 | Overcast | 13 °C | 30% | 100% | 91% | 756 mm Hg | W 262° 2.31 (6.03) m/s | 0.3 |
| 10:00 | Overcast | 13 °C | 27% | 95% | 88% | 757 mm Hg | W 271° 3.11 (7.31) m/s | 0.6 |
| 11:00 | Overcast | 14 °C | 23% | 100% | 79% | 757 mm Hg | W 270° 3.39 (5.61) m/s | 1.1 |
| 12:00 | Overcast | 15 °C | 20% | 100% | 73% | 757 mm Hg | W 265° 3.69 (5.42) m/s | 1.6 |
| 13:00 | Overcast | 16 °C | 16% | 91% | 68% | 757 mm Hg | W 266° 3.5 (5.31) m/s | 1.8 |
| 14:00 |  Patchy rain possible | 17 °C | 12% (0.01 mm/hr) | 80% | 63% | 757 mm Hg | W 264° 3.81 (5.94) m/s | 1.9 |
| 15:00 | Patchy rain possible | 17 °C | 13% (0.02 mm/hr) | 84% | 61% | 757 mm Hg | W 261° 4 (5.89) m/s | 1.6 |
| 16:00 | Patchy rain possible | 17 °C | 16% (0.03 mm/hr) | 86% | 64% | 757 mm Hg | WSW 255° 4.19 (5.81) m/s | 1.1 |
| 17:00 | Patchy rain possible | 16 °C | 15% (0.04 mm/hr) | 56% | 73% | 757 mm Hg | WSW 252° 3.89 (5.89) m/s | 0.6 |
| 18:00 | Patchy rain possible | 16 °C | 20% (0.04 mm/hr) | 79% | 75% | 757 mm Hg | WSW 250° 3.61 (6.03) m/s | 0.2 |
| 19:00 | Patchy rain possible | 14 °C | 23% (0.05 mm/hr) | 73% | 81% | 758 mm Hg | WSW 249° 3.31 (6.39) m/s | 0 |
| 20:00 |  Patchy rain possible | 13 °C | 31% (0.05 mm/hr) | 85% | 89% | 758 mm Hg | W 259° 2.89 (5.72) m/s | 0 |
| 21:00 | Overcast | 13 °C | 28% | 100% | 86% | 758 mm Hg | WNW 282° 2.31 (5.92) m/s | 0 |
| 22:00 | Overcast | 13 °C | 27% | 100% | 85% | 758 mm Hg | WNW 288° 2.19 (5.42) m/s | 0 |
| 23:00 | Overcast | 13 °C | 28% | 100% | 87% | 758 mm Hg | WNW 287° 2.39 (5.81) 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.