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Greencastle Weather and Climate: A Comprehensive Guide

The temperature in Greencastle varies moderately throughout the year. The temperatures shift from mild to cold. It is also known for its large amounts of rainfall. Let's now guide you through the climate details for a complete overview.

Average maximum day and minimum night temperature

The climate in Greencastle experiences moderate temperature changes, with mild shifts between seasons. Typically, average maximum daytime temperatures range from a moderate 17°C in August to a chilly 9°C in the coolest month, February.

Nights are cooler, with lows often dropping to around 5°C during the colder months. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Greencastle has a relatively rainy climate with high precipitation levels, averaging 1421 mm of rainfall annually. Greencastle offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between November (148 mm) and May (86 mm) is not too significant, making the climate enjoyable for visitors and residents alike.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

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 (31 KM, 19 Miles).

Daily hours of sunshine

Data from: Derry, Ireland (31 KM, 19 Miles).

Forecast for Greencastle

Sun   Jan 12
11°C | 1°C
S 8 m/s
overcast and no rain

overcast and no rain

Mon   Jan 13
13°C | 10°C
SW 8 m/s
1 mm
overcast and rain

overcast and rain

Tue   Jan 14
13°C | 9°C
SW 7 m/s
overcast and no rain

overcast and no rain

Select a Month of Interest

Check the conditions for any month of the year.

The best time of year to visit Greencastle in Ireland

Other facts from our historical weather data:
  • Which is the warmest month in Greencastle?
    August has an average maximum temperature of 17°C and is the warmest month of the year.
  • Which is the coldest month in Greencastle?
    The coldest month is February with an average maximum temperature of 9°C.
  • Which is the wettest month in Greencastle?
    November tops the wettest month list with 148 mm of rainfall.
  • Which is the driest month in Greencastle?
    May is the driest month with 86 mm of precipitation.
  • Which is the sunniest month in Greencastle?
    May is the sunniest month with an average of 203 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.