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Hourly Forecast
Daylight Hours
06:52
Sunrise
19:20
Sunset
Moon
Waxing Crescent
12:46
Moonrise
19:50
Moonset
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Weather in Onsala today, September 15, 2026
Rain features in Onsala on September 15, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise. The morning sky stays heavily clouded, with cover near 99% around 10:00. Grey conditions set the early tone before any later change.
Temperatures climb from an overnight low near 13°C toward a daytime high of about 17°C. Relative humidity sits between 77% and 98%, reaching its peak around 20:00. Expect gentle winds, highest near 23:00 at 7.5 km/h.
Afternoon showers stay in play, peaking near 98% around 18:00. Skies remain cluttered, with cover about 100% by 13:00. Expect visibility near 14.3 km, with poorer spells close to 6.1 km. The sun rises at 06:52 and sets at 19:20, for a total of 12 hours 27 minutes of sunlight today.
Overall, Onsala on September 15, 2026 suits indoor plans or waterproof kit, especially while rain chances stay near 98% and the high sits around 17°C.
Frequently asked questions about weather in Onsala
How warm does it get in Onsala?
The warmest month in Onsala is July, with average high temperatures of 21°C. The average temperature during this period is around 17°C.
How cold does it get in Onsala?
The coldest month in Onsala is January, with average low temperatures of -1°C. The average temperature during this period is around 1°C.
What is the wettest time of year in Onsala?
The wettest month in Onsala is August, with an average of 105mm of precipitation.
What is the driest time of year in Onsala?
The driest month in Onsala is April, with an average of 50mm of precipitation.
