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Hourly Forecast
Daylight Hours
07:12
Sunrise
19:34
Sunset
Moon
Waxing Crescent
12:29
Moonrise
20:45
Moonset
Daily Forecast
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Humidity
Weather in Altena today, September 15, 2026
Expect reduced visibility in Altena on September 15, 2026 where fog patches form. Allow more time for morning journeys if the air stays thick.
Temperatures climb from an overnight low near 16°C toward a daytime high of about 25°C. The air stays humid, with relative humidity between 61% and 79% and the peak around 21:00. Expect gentle winds, highest near 14:00 at 3.3 km/h.
Afternoon skies stay clogged, peaking close to 99% near 22:00. The grey theme continues rather than clearing out. Visibility holds near 37.7 km, though it can fall to 34.3 km. The sun rises at 07:12 and sets at 19:34, for a total of 12 hours 22 minutes of sunlight today.
The practical takeaway for Altena on September 15, 2026 is reduced clarity at times, so plan journeys with care near 25°C.
Frequently asked questions about weather in Altena
How warm does it get in Altena?
The warmest month in Altena is August, with average high temperatures of 22°C. The average temperature during this period is around 18°C.
How cold does it get in Altena?
The coldest month in Altena is January, with average low temperatures of 0°C. The average temperature during this period is around 2°C.
What is the wettest time of year in Altena?
The wettest month in Altena is January, with an average of 129mm of precipitation.
What is the driest time of year in Altena?
The driest month in Altena is April, with an average of 74mm of precipitation.
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