Death Valley weather in September 2026

Q: How hot is it in Death Valley in September?

Daytime temperatures usually reach 28°C in Death Valley in September with moderate heat and humidity, falling to 17°C at night.

Q: How sunny is it in Death Valley in September?

There are normally 9 hours of bright sunshine each day in Death Valley in September - that's 75% of daylight hours.

Q: Does it ever rain in Death Valley in September?

There are usually 2 days with some rain in Death Valley in September and the average monthly rainfall is 9mm.

Expect daytime maximum temperatures of 40°C in Death Valley, California in September and very high heat and humidity based on long-term weather averages. There are 11 hours of sunshine per day on average.

40
40°C max day temperature
11
11 hours of sunshine per day
1
1 day with some rainfall
24
24°C min night temperature
12
12 hours of daylight per day
VH
Very High heat & humidity
4
4 mm of monthly rainfall
8
8 (Very High) UV index

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The September weather guide for California (Death Valley) 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)

More about California

How hot is it in Death Valley in September?

Daytime temperatures usually reach 28°C in Death Valley in September with moderate heat and humidity, falling to 17°C at night.

How sunny is it in Death Valley in September?

There are normally 9 hours of bright sunshine each day in Death Valley in September - that's 75% of daylight hours.

Does it ever rain in Death Valley in September?

There are usually 2 days with some rain in Death Valley in September and the average monthly rainfall is 9mm.

Death Valley September sunrise & sunset times

Browse the sunrise and sunset times for Death Valley in September 2026. Select a month to view Death Valley sunrise and sunset times for the next 12 months.

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