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Hourly Forecast
Daylight Hours
07:11
Sunrise
19:25
Sunset
Moon
Waxing Crescent
13:09
Moonrise
21:36
Moonset
Daily Forecast
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Air Quality Data Available
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UV Index
Humidity
Weather in Castellanza today, September 16, 2026
Castellanza looks damp on September 16, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly. The morning sky stays heavily clouded, with cover near 81% around 11:00. Grey conditions set the early tone before any later change.
The day peaks near 26°C and cools toward 19°C. Expect humidity between 51% and 91%, most humid near 23:00. Airflow remains manageable, reaching about 2.3 km/h around 14:00.
Afternoon showers stay in play, peaking near 98% around 18:00. Skies remain cluttered, with cover about 100% by 18:00. Horizontal visibility sits around 36.2 km, briefly nearer 16.0 km. Sunrise is at 07:11 and sunset at 19:25, giving 12 hours 14 minutes of sunlight today.
The practical takeaway for Castellanza on September 16, 2026 is simple: plan for rain, keep layers handy, and work around a high of about 26°C.
Frequently asked questions about weather in Castellanza
How warm does it get in Castellanza?
The warmest month in Castellanza is July, with average high temperatures of 30°C. The average temperature during this period is around 25°C.
How cold does it get in Castellanza?
The coldest month in Castellanza is January, with average low temperatures of 1°C. The average temperature during this period is around 4°C.
What is the wettest time of year in Castellanza?
The wettest month in Castellanza is May, with an average of 166mm of precipitation.
What is the driest time of year in Castellanza?
The driest month in Castellanza is January, with an average of 52mm of precipitation.
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