Knock Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Knock.
Climate overview of Knock
Temperatures in Knock, Mayo, Ireland, shift moderately through the seasons. The warmest month is July at 19°C (66°F), and the coolest is January at 9°C (48°F).
With around 1186 mm (47 in) of annual rainfall, Knock has a notably wet climate. However, this rainfall is not evenly distributed, the city has pleasant summers and cold winters. The wettest month is December. May is the sunniest month, averaging 5.2 hours of sunshine per day.
Knock Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Knock - and find the best time to visit.
Monthly Temperature in Knock
The weather in Knock changes moderately throughout the year, offering enough variation to appreciate each season. Average daytime temperatures reach a pleasant 19°C (66°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 9°C (48°F).
At night, temperatures range from around 12°C (54°F) in July to 3°C (37°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Knock
Knock has a notably wet climate with abundant precipitation, recording 1186 mm (47 in) of rainfall per year. Despite minor fluctuations, Knock enjoys fairly consistent precipitation throughout the year. In December, you can expect around 111 mm (4.4 in) of precipitation, while in September, Knock receives about 87 mm (3.4 in). For more details, please visit our Knock Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Knock
Knock can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 5.2 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 1.2 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Knock by Month
The city experiences its highest humidity in January, reaching 90%. In May, the humidity drops to its lowest level at 73%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Knock
The mean wind speed varies between 3 m/s (6 knots) and 5 m/s (10 knots) throughout the year. It is lowest in July and August and highest during January, February, March and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Knock
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June and September
- Warmest weather: June, July and August
- Most sunshine: May
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Knock
What is the best time to visit Knock?
June and September typically offer the most optimal weather in Knock. In contrast, January, February, November and December tend to have less optimal conditions. Knock has pleasant summers and cold winters.
What temperatures can I expect in Knock?
Daytime highs range from 9°C (48°F) in January to 19°C (66°F) in July. Nighttime lows range from 3°C (37°F) to 12°C (54°F).
How much rain does Knock get?
Annual rainfall is around 1186 mm (47 in). December is the wettest month with 111 mm (4.4 in), while September is the driest with 87 mm (3.4 in).
How sunny is Knock?
Knock receives around 1,114 hours of sunshine per year. May is the sunniest month with 157 hours, while December is the cloudiest with just 35 hours.
Knock 3-Day Forecast
Knock on the map
Knock is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Go to Dingle in Ireland
Dolphins, Whales and breathtaking views. The colorful fishing village Dingle in Ireland has it all and this town is a must for your bucket list.
An Irish adventure like no other in Killarney National Park
Head down to the South West part of the country, County Kerry, to the small town of Killarney. If you want to experience what Ireland is really all about
Horseback riding in Ireland
Ireland is the most ideal place in the world for horseback riding. Combine this with the most hospitable people you will ever encounter and you have an unforgettable dream trip to add to your bucket list.