Northstar weather in September 2025

Expect 20°C daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Northstar in September based on long-term weather averages. There is usually 4 days with some rainfall and 20 mm of average monthly rainfall in September.

  • 20°C maximum daytime temperature in September in Northstar20
    20°C max day temperature
  • 11 hours of sunshine per day
  • 4 days with some rainfall in September in Northstar4
    4 days with some rainfall
  • 3°C minimum night-time temperature in September in Northstar3
    3°C min night temperature
  • 12 hours of daylight per day in September in Northstar12
    12 hours of daylight per day
  • No heat & humidity in September in Northstar0
    No heat & humidity
  • 20 mm monthly rainfall in September in Northstar20
    20 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Northstar7
    7 (High) UV index

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The September weather guide for California (Northstar) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Northstar in September?

Daytime temperatures usually reach 20°C in Northstar in September, falling to 3°C at night.

How sunny is it in Northstar in September?

There are normally 11 hours of bright sunshine each day in Northstar in September - that's 86% of daylight hours.

Does it rain in Northstar in September?

There are usually 4 days with some rain in Northstar in September and the average monthly rainfall is 20mm.

Northstar September sunrise & sunset times

Browse the sunrise and sunset times for Northstar in September 2025. Select a month to view Northstar sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:29 18:31
Monday, 15th September 2025 05:42 18:08
Tuesday, 30th September 2025 05:56 17:44

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