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Greencastle Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Greencastle.
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Climate overview of Greencastle
Greencastle, Tyrone County, United Kingdom, has a moderate seasonal temperature range, with July reaching 19°C (66°F) and January cooling to 8°C (46°F).
The city receives considerable rain/snowfall, with around 1098 mm (43 in) annually. August is the wettest month. It has pleasant summers and cold winters. Sunshine peaks in May, when the city sees around 6.8 hours of sunshine per day.
Greencastle Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Greencastle - and find the best time to visit.
Monthly Temperature in Greencastle
In Greencastle, seasonal changes bring about a moderate variation in temperatures. Typically, average maximum daytime temperatures range from a pleasant 19°C (66°F) in July to a chilly 8°C (46°F) in the coolest month, January.
Nights vary from 11°C (52°F) in July to around 3°C (37°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Greencastle
Greencastle is known for its substantial rain/snowfall, with annual precipitation reaching 1098 mm (43 in). Precipitation levels in Greencastle remain relatively steady throughout the year. August has the most rain, with 102 mm (4 in) over 20 days. In the driest month March, this drops slightly to 81 mm (3.2 in), making the city's climate fairly predictable. For more details, please visit our Greencastle 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 Greencastle
For those who appreciate different seasons, Greencastle serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.8 hours of sunshine daily, and embrace the darker days in December, offering only 1.3 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Derry, Ireland (38 KM, 23 Miles).
Daily hours of sunshine
Data from: Derry, Ireland (38 KM, 23 Miles).
Best Time to Visit Greencastle
For comfortable weather, consider visiting Greencastle in June and July. Conditions are usually least favourable in January, February, March and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
cold
Feb
cold
Mar
cold
Apr
mixed
May
good
Jun
very good
Jul
very good
Aug
good
Sep
good
Oct
good
Nov
mixed
Dec
cold
- Best overall: June and July
- Warmest weather: June, July and August
- Most sunshine: May
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Greencastle
What is the best time to visit Greencastle?
June and July typically offer the most optimal weather in Greencastle. In contrast, January, February, March and December tend to have less optimal conditions. Greencastle has pleasant summers and cold winters.
What temperatures can I expect in Greencastle?
Daytime highs range from 8°C (46°F) in January to 19°C (66°F) in July. Nighttime lows range from 3°C (37°F) to 11°C (52°F).
How much rain does Greencastle get?
Annual rainfall is around 1098 mm (43 in). August is the wettest month with 102 mm (4 in), while March is the driest with 81 mm (3.2 in).
How sunny is Greencastle?
Greencastle receives around 1,342 hours of sunshine per year. May is the sunniest month with 203 hours, while December is the cloudiest with just 39 hours.
Greencastle 3-Day Forecast
Greencastle on the map
Greencastle is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
London
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18°C (64°F) York19°C (66°F) Edinburgh17°C (63°F) Blackpool17°C (63°F) Glasgow17°C (63°F) Bucket list
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