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Castlebar Weather in October
October in Castlebar sees daytime temperatures around 14°C (57°F) and lows of 8°C (46°F) at night. With around 114 mm (4.5 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Castlebar in October
You can typically expect 23 days of rain this month, averaging around 114 mm (4.5 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Castlebar in October
Castlebar in October gets highs of 14°C (57°F) during the day and drops to 8°C (46°F) at night. Conditions are often most pleasant around the middle of the day. With overnight lows of 8°C (46°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Castlebar in October
The area experiences limited sunny days, amounting to roughly 74 hours of sunshine. This makes it perfect for those who lean towards cooler, cloudier settings rather than intense sunlit days.If you prefer dry days with pleasant temperatures, June typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Castlebar Temperature in October
Min Temperature
8°C (46°F)
Max Temperature
14°C (57°F)
Chance of Rain
76%
Precipitation
114 mm (4.5 in)
Rainy days
23 days
Humidity
86% *
Sunshine
74 hours *
Percentage Sunshine
24% *
* Data from: Claremorris, Ireland (25 KM, 16 Miles).
Castlebar Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Castlebar - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Castlebar typically stay consistent throughout October, with daily highs averaging around 14°C (57°F). Nights are cold, with lows typically ranging from 6°C (43°F) to 9°C (48°F).
Average temperatures in October
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in October
Historical weather records for Castlebar in October
Browse day-by-day weather records for Castlebar spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Castlebar historical weather extremes in October
The extremes listed below come from historical weather data collected in Castlebar from 1986 through 2025.
- On October 9, 2023, temperatures climbed to 19°C (66°F), marking the warmest October day on record.
- The coldest October day was on October 28, 2008, with a maximum of 5°C (41°F).
- The coldest night in October in Castlebar was on October 17, 1993, with a minimum of -3°C (27°F).
- The heaviest October precipitation occurred on October 28, 2014, when 32 mm (1.3 in) of precipitation fell.
Best Places in Ireland in October
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in October →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Castlebar in October
Pack for changing conditions in Castlebar in October. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.
What To Do in Castlebar in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming4/10 -
Cycling5/10 -
Walking5/10 -
Camping3/10 -
Outdoor sports9/10
Castlebar 3-Day Forecast
More climate data for Castlebar
Temperature Rainfall Sunshine Humidity
See the full Castlebar climate overview or explore weather in Ireland.
Popular in October
Where to go in October - average daytime high across popular destinations.
Westport
14°C (57°F) Doolin15°C (59°F) Kilkenny
14°C (57°F) Cork
15°C (59°F) Kenmare14°C (57°F) Killarney14°C (57°F) Galway15°C (59°F) Dublin15°C (59°F) Bucket list
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