5-day weather forecast Helsinki Sep 21, 2026
12°Weather forecast Helsinki today Sep 21, 2026: sunny, temperature from 10 °C to 17 °C.
Precipitation probability 70%. Wind up to 4.39 m/s (gusts 9.81 m/s). Air humidity 58–93%, atmospheric pressure 749–759 mm Hg, UV index up to 1.8.
5 days at a glance — tap a day to open it
Sunrise 07:02
Sunset 19:24
Sunset 19:24
Waxing Gibbous82% illuminated
Moonrise 18:40 · Moonset does not set today
Moonrise 18:40 · Moonset does not set today
Chart
Table
Mon, Sep 21, 2026
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Light rain shower | 12 °C | 40% (0.16 mm/hr) | 100% | 85% | 750 mm Hg | SW 221° 3.69 (9.81) m/s | 0 |
| 01:00 | Thundery outbreaks possible | 12 °C | 39% (0.15 mm/hr) | 100% | 84% | 750 mm Hg | SSW 211° 4.31 (9.81) m/s | 0 |
| 02:00 | Thundery outbreaks possible | 12 °C | 26% (0.01 mm/hr) | 92% | 85% | 750 mm Hg | SSW 208° 4.39 (9.61) m/s | 0 |
| 03:00 |  Partly cloudy | 12 °C | 15% | 40% | 85% | 749 mm Hg | SSW 209° 3.39 (8.11) m/s | 0 |
| 04:00 |  Patchy rain possible | 12 °C | 28% (0.03 mm/hr) | 82% | 88% | 749 mm Hg | SSW 212° 3.31 (6.69) m/s | 0 |
| 05:00 | Patchy rain possible | 11 °C | 70% (1.17 mm/hr) | 78% | 90% | 749 mm Hg | SW 236° 2.19 (3.92) m/s | 0 |
| 06:00 |  Clear | 10 °C | 14% | 5% | 92% | 750 mm Hg | W 266° 1.89 (2.53) m/s | 0 |
| 07:00 | Clear | 10 °C | 15% | 5% | 92% | 750 mm Hg | WNW 288° 1.69 (1.92) m/s | 0 |
| 08:00 |  Sunny | 10 °C | 14% | 3% | 91% | 750 mm Hg | WNW 297° 1.69 (2.42) m/s | 0 |
| 09:00 | Sunny | 11 °C | 12% | 3% | 86% | 751 mm Hg | WNW 289° 1.31 (2.31) m/s | 0.3 |
| 10:00 | Sunny | 13 °C | 10% | 5% | 80% | 751 mm Hg | WNW 299° 1.31 (2.11) m/s | 0.7 |
| 11:00 | Sunny | 14 °C | 7% | 5% | 74% | 752 mm Hg | NNW 328° 1.39 (2.14) m/s | 1.1 |
| 12:00 | Sunny | 15 °C | 6% | 5% | 69% | 752 mm Hg | NNW 343° 1.5 (2.31) m/s | 1.5 |
| 13:00 | Sunny | 16 °C | 4% | 4% | 64% | 752 mm Hg | NNW 344° 1.61 (2.61) m/s | 1.8 |
| 14:00 | Sunny | 17 °C | 4% | 9% | 60% | 753 mm Hg | N 7° 1.19 (2.33) m/s | 1.7 |
| 15:00 |  Patchy rain possible | 17 °C | 12% (0.02 mm/hr) | 77% | 58% | 753 mm Hg | N 355° 0.89 (2.42) m/s | 1.4 |
| 16:00 | Patchy rain possible | 17 °C | 14% (0.04 mm/hr) | 82% | 58% | 754 mm Hg | N 352° 1.31 (2.94) m/s | 1 |
| 17:00 | Patchy rain possible | 16 °C | 36% (0.38 mm/hr) | 87% | 63% | 755 mm Hg | N 10° 1.61 (2.92) m/s | 0.5 |
| 18:00 | Patchy rain possible | 15 °C | 30% (0.22 mm/hr) | 73% | 75% | 755 mm Hg | NNE 16° 1.89 (4.19) m/s | 0.2 |
| 19:00 | Patchy rain possible | 13 °C | 20% (0.01 mm/hr) | 71% | 83% | 756 mm Hg | N 9° 2.31 (5.61) m/s | 0 |
| 20:00 | Patchy rain possible | 12 °C | 35% (0.15 mm/hr) | 74% | 88% | 757 mm Hg | N 0° 2.61 (6.61) m/s | 0 |
| 21:00 | Clear | 11 °C | 14% | 0% | 92% | 758 mm Hg | N 358° 2.69 (7.5) m/s | 0 |
| 22:00 | Clear | 11 °C | 14% | 0% | 93% | 758 mm Hg | N 2° 2.81 (7.61) m/s | 0 |
| 23:00 | Clear | 10 °C | 14% | 0% | 92% | 759 mm Hg | N 5° 2.81 (7.61) m/s | 0 |
Mon, Sep 21, 2026
Frequently asked questions about the 5-day weather in Helsinki
What will the weather be like in Helsinki over the next 5 days?
Over the next 5 days in Helsinki the temperature is expected to range from about 8 to 17 °C. See the detailed hourly forecast for each of the 5 days in the charts above.
On which of the next 5 days will it rain in Helsinki?
The chance of rain in Helsinki over the next 5 days reaches 82%. Check the 5-day precipitation chart above to see exactly which days and hours bring rain.
How accurate is the 5-day weather forecast for Helsinki?
A 5-day forecast is fairly reliable: the first 2–3 days are usually very accurate, while days 4–5 may be refined. The data is updated several times a day, so check back before important plans.
Which of the next 5 days in Helsinki will be the warmest and which the coolest?
Over the next 5 days the temperature in Helsinki ranges from about 8 to 17 °C. Compare the warmest and coolest day on the temperature chart above.
Will it be windy in Helsinki over the next 5 days?
Over the next 5 days the wind in Helsinki picks up to 8 m/s. The windiest days are easy to spot on the wind chart above.
Which day of the week in Helsinki is best for a walk or a trip?
For a walk or a trip, pick the days with the lowest chance of rain (up to 82%) and light wind — easy to compare on the 5-day charts above.
How can I best use the 5-day forecast for Helsinki?
The first 2–3 days are reliable enough for firm decisions, while days 4–5 are a guide that sharpens as they approach. The forecast is updated several times a day, so check again before important plans.
Will I need an umbrella or sunscreen in Helsinki this week?
Rain reaches a 82% chance across the next 5 days, so pack something waterproof for the wettest of them — the daily strip above shows which. Today’s UV index peaks at 1.8; sunscreen is worth it from about 3 upwards.
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.