Grianan of Aileach
Derry, Ireland
Grianan of Aileach is a ringfort located in County Donegal, Ireland. It is designated as a national monument of Ireland and is one of the most looked-up sights in the country on English Wikipedia.
Planning a visit
The warmest months are July and August, with daily highs of 17 °C and lows of 11 °C, while January and December are the coldest months with highs of 6 °C and lows of 2 °C. April is the driest month with 76 mm of rain on about 16 days, whereas August sees the most rain at 101 mm on about 23 days.
The nearest airport is City of Derry Airport, located 18 km away, and Belfast International Airport is 88 km away. The site is 200 km from Dublin. Opening hours are Monday through Sunday from 09:00 to 19:00, and the address is Burt, Co Donegal.
Weather by month
The warmest month is July, with an average high of 17 °C. Rain is spread fairly evenly through the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high, °C | 6 | 7 | 8 | 11 | 13 | 16 | 17 | 17 | 15 | 12 | 9 | 7 |
| Average low, °C | 2 | 2 | 3 | 4 | 7 | 9 | 11 | 11 | 10 | 7 | 5 | 2 |
| Rainfall, mm | 130 | 95 | 99 | 76 | 77 | 78 | 90 | 101 | 96 | 122 | 115 | 122 |
| Rainy days | 22 | 19 | 19 | 16 | 16 | 19 | 21 | 23 | 19 | 20 | 21 | 23 |
Temperatures and rainfall: 1981–2010 averages for this spot (4 km grid), from CHELSA. Rainy days: 2015–2024, NASA POWER.
