Castlebar Weather in April
Thinking of visiting Castlebar in April? Expect moderate temperatures reaching 13°C (55°F) during the day, dropping to 5°C (41°F) at night, with the driest conditions of the year.
Rainfall in Castlebar in April
Take advantage of the dry conditions this month, with minimal rain expected, even if it's a cooler time of year. Past climate data indicates that roughly 17 days will see rain, totalling around 90 mm (3.5 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Castlebar in April
In April, Castlebar gets moderate temperatures, with highs of 13°C (55°F). Nights cool to around 5°C (41°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows around 5°C (41°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Castlebar in April
The month brings about 132 hours of sunlight, offering a comfortable mix of sun and overcast.If you prefer enjoying temperate temperatures and rain-free days, 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 April
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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
49-year average (1976-2025)
Based on our historical records, temperatures in Castlebar typically stay consistent throughout April, with daily highs averaging around 13°C (55°F). Nights are cold, with lows typically ranging from 4°C (39°F) to 6°C (43°F).
Average temperatures in April
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in April
Historical weather records for Castlebar in April
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 April
Based on 32 years of weather observations in Castlebar between 1994 and 2026, these are the recorded extremes.
- The warmest day in April was on April 30, 2025, with a maximum of 23°C (73°F).
- The coldest April day was on April 2, 2018, with a maximum of 4°C (39°F).
- Castlebar registered its coldest April night on April 5, 2000, with temperatures dropping to -2°C (28°F).
- Peak precipitation in April occurred on April 5, 2010, when 25 mm (1 in) of precipitation was measured.
Best Places in Ireland in April
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in April →
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 April
The weather can be unpredictable in April, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Castlebar in April
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming5/10 -
Cycling6/10 -
Walking6/10 -
Camping4/10 -
Outdoor sports9/10
Castlebar 3-Day Forecast
Temperature Rainfall Sunshine Humidity
See the full Castlebar climate overview or explore weather in Ireland.
Popular in April
Where to go in April - average daytime high across popular destinations.
Kilkenny
13°C (55°F) Galway
14°C (57°F) Kenmare13°C (55°F) Killarney13°C (55°F) Doolin12°C (54°F) Westport13°C (55°F) Cork
13°C (55°F) Dublin13°C (55°F) 
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