5-day weather forecast Helsinki Sep 12, 2026

15° · Light rain shower

Weather forecast Helsinki Saturday Sep 12, 2026: light rain shower, temperature from 8 °C to 15 °C.

Precipitation probability 67%. Wind up to 2.81 m/s (gusts 7.42 m/s). Air humidity 68–98%, atmospheric pressure 758–761 mm Hg, UV index up to 2.3.

Weather Alerts

ModerateSep 10, 03:00 PMSep 10, 11:00 PMTranslate with Google
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.
Sunrise 06:41
Sunset 19:51
New Moon3% illuminated
Moonrise 08:23 · Moonset 19:33
Chart
Table

Forecast from 8 °C to 15 °C and precipitation

Temperature & Precipitation
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Temperature (°C)10999988810111213151514131212121212121212
Precipitation (mm/hr)000000000000.01000.110.110.60.050.020.210.230.210.10.25

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Cloud cover (%)10664161155310010010097617210010010010010010010010063100100
Rain chance (%)151529161615213025211912131934406745405052415353

Wind speed and direction

Wind & Wind gust
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Wind (m/s)2.692.812.612.312.111.611.191.110.810.390.610.811.52.192.52.192.111.811.191.391.191.3111
Wind gust (m/s)7.426.696.444.5331.691.311.110.810.530.811.392.53.223.614.1143.612.032.221.51.611.111
Wind direction (°)WNW 285°WNW 283°WNW 285°WNW 284°WNW 291°NW 314°NNW 348°NNE 16°NE 37°NNW 344°NW 319°WSW 241°SW 226°SW 230°SW 222°SW 223°SSW 210°SSW 202°S 184°SSE 163°SSE 151°SE 143°SSE 150°SSE 150°

Air humidity

Humidity
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Humidity (%)929394949393929183767270687281899597969798989898

Atmospheric pressure

Pressure
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Pressure (mm Hg)761761761761761761761761761761761761761761761761760760760759759759758758

Ultraviolet index

UV Index
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
UV Index000000000.20.40.81.422.32.11.50.70.30.100000

Air quality & pollen

Air quality
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
PM2.5 (µg/m³)2.22.22.22.22.12.12.22.52.52.82.92.22.32.832.92.62.73.23.84.54.54.95.2
PM10 (µg/m³)3.13.33.43.53.63.73.64.34.64.34.43.744.75.255.36.46.36.37.58.18.28.2
Ozone (O₃) (µg/m³)565452494746464650535761667175797778798081808079
NO₂ (µg/m³)4.14.34.75.45.35.56.87.57.86.45.243.22.62.22.12.42.42.533.53.73.93.9
SO₂ (µg/m³)0.40.30.30.30.40.40.50.60.70.70.40.40.30.30.20.30.20.20.30.30.40.40.30.3
CO (µg/m³)157160160160160160161164176177171168167161159158155155156165171174172169

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.