Dundalk Weather in May
Dundalk in May averages 16°C (61°F) during the day and 8°C (46°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Dundalk in May
Typically around 17 days of rainfall are expected, averaging 74 mm (2.9 in) for the month. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.
Temperature in Dundalk in May
Expect highs of 16°C (61°F) in Dundalk in May, with nights dropping to around 8°C (46°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Dundalk in May
The month experiences a moderate amount of sunlight, with 188 hours of sunshine. This provides a nice balance between sunshine and clouds.If you prefer enjoying temperate temperatures and rain-free days, July 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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Dundalk's climate page.
Dundalk Temperature in May
Min Temperature
8°C (46°F)
Max Temperature
16°C (61°F)
Chance of Rain
55%
Precipitation
74 mm (2.9 in)
Rainy days
17 days
Humidity
68% *
Sunshine
188 hours *
Percentage Sunshine
42% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Dundalk typically stay consistent throughout May, with daily highs averaging around 16°C (61°F). Nights are cold, with lows typically ranging from 6°C (43°F) to 9°C (48°F).
Average temperatures in May
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 May
Historical weather for Dundalk in May
Browse day-by-day weather records for Dundalk spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Dundalk historical weather extremes in May
The extremes listed below come from historical weather data collected in Dundalk from 1976 through 2026.
- The warmest day in May was on May 4, 1990, with a maximum of 24°C (75°F).
- The lowest daytime temperature in May was 4°C (39°F), recorded on May 14, 1993.
- Nighttime temperatures dropped to -1°C (30°F) on May 4, 1979, marking the coldest May night on record.
- The heaviest May precipitation occurred on May 2, 1977, when 41 mm (1.6 in) of precipitation fell.
Best Places in Ireland in May
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in May →
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What to Wear in Dundalk in May
Pack for changing conditions in Dundalk in May. 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. Rain gear is recommended, you can expect wet weather on multiple days. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Dundalk in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Dundalk's climate page.
Temperature Rainfall Sunshine Humidity
See the full Dundalk climate overview or explore weather in Ireland.
