5-day weather forecast Helsinki 18-04-2026

Weather forecast Helsinki today 18.04.2026: partly cloudy, temperature from 4 °C to 11 °C.

No precipitation expected. Wind up to 3.61 m/s (gusts 6.11 m/s). Air humidity 35–74%, atmospheric pressure 767–769 mm Hg, UV index up to 3.

Sunrise 05:55
Sunset 20:46
Waxing Crescent1% illuminated
Moonrise 05:31 · Moonset 23:21
Chart
Table
Sat, Apr 18, 2026
TemperatureRain chanceCloud coverHumidityPressureWindUV Index
00:00Weather
Overcast
7 °C0% 100%59%767 mm HgENE 57° 1.31 (2.72) m/s0
01:00Weather
Overcast
6 °C0% 100%61%767 mm HgNE 49° 1.5 (3.14) m/s0
02:00Weather
Overcast
6 °C0% 100%62%767 mm HgNE 34° 1.69 (3.58) m/s0
03:00Weather
Overcast
6 °C0% 100%62%767 mm HgNE 38° 2.11 (4.42) m/s0
04:00Weather
Overcast
6 °C0% 100%64%767 mm HgNE 50° 2.5 (5.25) m/s0
05:00Weather
Cloudy
5 °C0% 73%68%767 mm HgENE 65° 2.69 (5.67) m/s0
06:00Weather
Partly cloudy
4 °C0% 49%72%767 mm HgENE 70° 2.61 (5.44) m/s0
07:00Weather
Sunny
4 °C0% 21%74%767 mm HgENE 74° 2.5 (4.83) m/s0.1
08:00Weather
Sunny
5 °C0% 12%72%768 mm HgE 83° 2.61 (4.42) m/s0.4
09:00Weather
Sunny
6 °C0% 12%68%768 mm HgE 90° 2.89 (4.58) m/s0.8
10:00Weather
Sunny
7 °C0% 17%64%768 mm HgE 101° 2.81 (4.22) m/s1.5
11:00Weather
Partly cloudy
11 °C0% 0%35%767 mm HgESE 114° 2.61 (3.83) m/s2.1
12:00Weather
Partly cloudy
7 °C0% 34%60%768 mm HgSE 127° 2.5 (3.61) m/s2.7
13:00Weather
Partly cloudy
8 °C0% 31%58%768 mm HgSE 138° 2.5 (3.72) m/s3
14:00Weather
Partly cloudy
8 °C0% 37%57%768 mm HgSSE 156° 2.69 (4.06) m/s2.9
15:00Weather
Partly cloudy
8 °C0% 34%57%768 mm HgSSE 161° 3 (4.58) m/s2.5
16:00Weather
Partly cloudy
8 °C0% 47%57%768 mm HgSSE 162° 2.81 (4.22) m/s1.8
17:00Weather
Partly cloudy
8 °C0% 26%58%767 mm HgSSE 168° 2.5 (3.89) m/s1.2
18:00Weather
Partly cloudy
7 °C0% 41%59%767 mm HgSE 143° 2.89 (4.5) m/s0.6
19:00Weather
Partly cloudy
6 °C0% 38%62%768 mm HgESE 114° 2.61 (4.22) m/s0.3
20:00Weather
Overcast
6 °C0% 97%66%768 mm HgESE 110° 1.69 (2.94) m/s0
21:00Weather
Overcast
5 °C0% 100%69%768 mm HgESE 120° 1 (1.83) m/s0
22:00Weather
Overcast
5 °C0% 100%67%769 mm HgENE 63° 1.11 (1.97) m/s0
23:00Weather
Overcast
5 °C0% 93%70%769 mm HgENE 75° 3.61 (6.11) m/s0
Sat, Apr 18, 2026

Frequently asked questions about the weather in Helsinki

Today in Helsinki the temperature ranges from 4 °C to 11 °C, wind up to 3.61 m/s. Check the detailed hourly forecast above for more information.

The precipitation probability in Helsinki today is 0%. View the full multi-day forecast above to see the rain chances for each upcoming day.

The wind speed in Helsinki today reaches up to 3.61 m/s with gusts up to 6.11 m/s. Check the detailed wind chart above for hourly wind data.

The air humidity in Helsinki today ranges from 35% to 74%. View the humidity chart above for hourly details.

The UV index in Helsinki today reaches up to 3. Check the UV index chart above for hourly values throughout the day.

The atmospheric pressure in Helsinki today ranges from 767 to 769 mm Hg. View the pressure chart above for hourly readings.

Cloud cover in Helsinki today reaches up to 100%. Check the cloud cover chart above for hourly details throughout the day.

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.