Galena weather in October 2026

Q: How warm is it in Galena in October?

Daytime temperatures usually reach 17°C in Galena in October, falling to 6°C at night.

Q: How sunny is it in Galena in October?

There are normally 6 hours of bright sunshine each day in Galena in October - that's 56% of daylight hours.

Q: How warm is the sea around Galena in October?

The average sea temperature around Galena in October is 14°C.

Q: Does it rain in Galena in October?

There are usually 9 days with some rain in Galena in October and the average monthly rainfall is 68mm.

Expect daytime maximum temperatures of 63°F in Galena, Illinois in October based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 2.6 inches of rainfall in the month.

63
63°F max day temperature
7
7 hours of sunshine per day
9
9 days with some rainfall
39
39°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
2.6
2.6 inches of monthly rainfall
4
4 (Moderate) UV index

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The October weather guide for Illinois (Galena) 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) | Imperial (°F)