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Mammoth Cave weather in September 2025
Expect 27°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Mammoth Cave in September. Check more long-term weather averages for Mammoth Cave in September before you book your next holiday to Kentucky in 2025/2026.
- 2727°C max day temperature
- 8 hours of sunshine per day
- 88 days with some rainfall
- 1414°C min night temperature
- 1212 hours of daylight per day
- LLow heat & humidity
- 9595 mm of monthly rainfall
- 77 (High) UV index
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The September weather guide for Kentucky (Mammoth Cave) 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 the USA
How hot is it in Mammoth Cave in September?
Daytime temperatures usually reach 27°C in Mammoth Cave in September with low heat and humidity, falling to 14°C at night.
How sunny is it in Mammoth Cave in September?
There are normally 8 hours of bright sunshine each day in Mammoth Cave in September - that's 61% of daylight hours.
Does it rain in Mammoth Cave in September?
There are usually 8 days with some rain in Mammoth Cave in September and the average monthly rainfall is 95mm.
Mammoth Cave September sunrise & sunset times
Browse the sunrise and sunset times for Mammoth Cave in September 2025. Select a month to view Mammoth Cave sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:15 | 18:13 |
Monday, 15th September 2025 | 05:27 | 17:52 |
Tuesday, 30th September 2025 | 05:39 | 17:29 |
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