Donegal weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Poor
Best time to visit: April – June
What is the weather like in Donegal in July?
In July, Donegal is mild: daytime highs average 18 °C, and nights cool down to about 12 °C. The sea averages 15.0 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. It rains often – on about 19 days, adding up to 106 mm. All in all, July is not an ideal month for a holiday in Donegal.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 16 h 48 min05:14 – 22:02
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 82 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+1Europe/Dublin
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %27 %
- Few rainy daysweight 20 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in July
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Donegal in July: quick answers
Is Donegal hot in July?
No. In July, Donegal is mild: daytime highs average 18 °C and nights drop to about 12 °C.
Can you swim in Donegal in July?
Only if you don't mind cold water: in July the sea averages just 15.0 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Donegal in July?
It rains often – on about 19 days, adding up to 106 mm.
Donegal month by month
The whole year in DonegalAll destinations: IrelandWhere to go in JulySea temperature in July
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences