Letterkenny Weather in July
With daytime temperatures of 19°C (66°F) and nighttime lows of 12°C (54°F), July in Letterkenny brings pleasant temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 111 mm (4.4 in) falls on average.
Rainfall in Letterkenny in July
Analyzing past climate data, one can expect approximately 19 days of rain, averaging 111 mm (4.4 in). 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 July
Expect highs of 19°C (66°F) in Letterkenny in July, with nights dropping to around 12°C (54°F). Summer occurs in July. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows of 12°C (54°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest. On average, it has the peak temperatures of the year.
Sunshine in Letterkenny in July
The month experiences a moderate amount of sunlight, with 141 hours of sunshine. This provides a nice balance between sunshine and clouds.If you favor pleasant temperatures and minimal rainfall, July is one of the best months to visit Letterkenny.
Letterkenny Temperature in July
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Chance of Rain
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Letterkenny Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Letterkenny - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Letterkenny typically stay consistent throughout July, with daily highs averaging around 19°C (66°F). Nights are cool, with lows around 12°C (54°F).
Average temperatures in July
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 July
Historical weather records for Letterkenny in July
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 July
The extremes listed below come from historical weather data collected in Letterkenny from 1976 through 2026.
- The warmest day in July was on July 19, 2006, with a maximum of 29°C (84°F).
- The lowest daytime temperature in July was 10°C (50°F), recorded on July 1, 1997.
- Nighttime temperatures dropped to 4°C (39°F) on July 23, 2010, marking the coldest July night on record.
- The wettest July day on record brought 37 mm (1.5 in) of precipitation to Letterkenny (July 22, 2023).
Best Places in Ireland in July
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in July →
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 Letterkenny in July
Pleasant temperatures in July 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 July
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming6/10 -
Cycling9/10 -
Walking9/10 -
Camping6/10 -
Outdoor sports9/10
Letterkenny 3-Day Forecast
See the full Letterkenny climate overview or explore weather in Ireland.
Popular in July
Where to go in July - average daytime high across popular destinations.
Cork
19°C (66°F) Kilkenny
20°C (68°F) Dublin20°C (68°F) Kenmare
19°C (66°F) Galway20°C (68°F) Killarney19°C (66°F) Westport19°C (66°F) Doolin18°C (64°F) 
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