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Hourly Forecast
Daylight Hours
07:04
Sunrise
18:59
Sunset
Moon
Waxing Gibbous
17:30
Moonrise
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View stargazing scoreWeather in Grassau today, September 22, 2026
Grassau looks cloudy on September 22, 2026, with grey skies for much of the day. Sunshine stays limited, so the overall tone is muted from the morning onward. Expect a grey start, with morning cloud around 80% by 04:00. Outdoor plans early on should not rely on bright skies.
The temperature range runs from about 5°C up to 15°C. Moisture in the air spans 57%-98%, with the highest values around 03:00. Airflow remains manageable, reaching about 2.9 km/h around 14:00.
Through the afternoon cloud remains the main feature, with cover near 76% around 13:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 26.4 km, briefly nearer 0.9 km. The sun rises at 07:04 and sets at 18:59, for a total of 11 hours 54 minutes of sunlight today.
Overall, Grassau on September 22, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 15°C.
Frequently asked questions about weather in Grassau
How warm does it get in Grassau?
The warmest month in Grassau is August, with average high temperatures of 23°C. The average temperature during this period is around 18°C.
How cold does it get in Grassau?
The coldest month in Grassau is January, with average low temperatures of -5°C. The average temperature during this period is around -1°C.
What is the wettest time of year in Grassau?
The wettest month in Grassau is July, with an average of 202mm of precipitation.
What is the driest time of year in Grassau?
The driest month in Grassau is February, with an average of 98mm of precipitation.
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