Castlebar weather in October 2026

Q: How warm is it in Castlebar in October?

Daytime temperatures usually reach 14°C in Castlebar in October, falling to 8°C at night.

Q: How sunny is it in Castlebar in October?

There are normally 3 hours of bright sunshine each day in Castlebar in October - that's 29% of daylight hours.

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

The average sea temperature around Castlebar in October is 13°C.

Q: Does it rain in Castlebar in October?

There are usually 16 days with some rain in Castlebar in October and the average monthly rainfall is 67mm.

Expect daytime maximum temperatures of 13°C in Castlebar, Ireland in October based on long-term weather averages. There are 2 hours of sunshine per day on average with 23 days with some rainfall and typically 131 mm of rainfall in the month.

13
13°C max day temperature
2
2 hours of sunshine per day
23
23 days with some rainfall
7
7°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
131
131 mm of monthly rainfall
2
2 (Low) UV index

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The October weather guide for Ireland (Castlebar) 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)