Letterkenny Weather in August
August in Letterkenny sees daytime temperatures around 18°C (64°F) and lows of 12°C (54°F) at night. With around 115 mm (4.5 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Letterkenny in August
Past climate data indicates that roughly 20 days will see rain, totalling around 115 mm (4.5 in) for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Letterkenny in August
In August, Letterkenny gets pleasant temperatures, with highs of 18°C (64°F). Nights cool to around 12°C (54°F). The summer season takes place during August. Conditions are often most pleasant around the middle of the day. Nights drop to around 12°C (54°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Letterkenny in August
The city usually sees around 140 hours of sunlight, indicating a moderately sunny period.If you favor pleasant temperatures and minimal rainfall, August is one of the best months to visit Letterkenny.
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 Letterkenny's climate page.
Letterkenny Temperature in August
Min Temperature
12°C (54°F)
Max Temperature
18°C (64°F)
Chance of Rain
68%
Precipitation
115 mm (4.5 in)
Rainy days
20 days
Sunshine
140 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Letterkenny typically stay consistent throughout August, with daily highs averaging around 18°C (64°F). Nights are cool, with lows around 11°C (52°F).
Average temperatures in August
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 August
Historical weather for Letterkenny in August
Browse day-by-day weather records for Letterkenny spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Letterkenny historical weather extremes in August
According to our 49 years of weather records for Letterkenny, the following extremes were recorded between 1976 and 2025.
- The warmest day in August was on August 17, 1976, with a maximum of 26°C (79°F).
- Letterkenny experienced its chilliest August day on August 30, 1992, reaching only 12°C (54°F).
- Letterkenny registered its coldest August night on August 24, 2014, with temperatures dropping to 3°C (37°F).
- The wettest day in August Letterkenny was on August 1, 1995 with 67 mm (2.6 in) of precipitation.
Best Places in Ireland in August
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in August →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Letterkenny in August
Pleasant temperatures in August mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Letterkenny in August
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 Letterkenny's climate page.
See the full Letterkenny climate overview or explore weather in Ireland.
