Climate and monthly weather forecast
Donegal, Ireland

Weather in January

January, like December, is another chilly winter month in Donegal, Ireland, with temperature in the range of an average low of 2.9°C (37.2°F) and an average high of 6.4°C (43.5°F). January is the coldest month, with an average high-temperature of 6.4°C (43.5°F) and an average low-temperature of 2.9°C (37.2°F). Weather in January »

Weather in February

February, the last month of the winter in Donegal, is also a frosty month, with an average temperature varying between 7.1°C (44.8°F) and 3.1°C (37.6°F). In February, the average high-temperature is almost the same as in January - a still frosty 7.1°C (44.8°F). Weather in February »

Weather in March

The first month of the spring, March, is still a chilly month in Donegal, Ireland, with an average temperature ranging between max 8.5°C (47.3°F) and min 3.3°C (37.9°F). In Donegal, the average high-temperature in March is relatively the same as in February - a still chilly 8.5°C (47.3°F). Weather in March »

Weather in April

April in Donegal, Ireland, is a fresh spring month, with temperature in the range of an average low of 4.8°C (40.6°F) and an average high of 10.9°C (51.6°F). In April, the average high-temperature is relatively the same as in March - a fresh 10.9°C (51.6°F). Weather in April »

Weather in May

May, the last month of the spring in Donegal, is a mild month, with an average temperature varying between 6.8°C (44.2°F) and 13.1°C (55.6°F). In Donegal, the average high-temperature in May is practically the same as in April - a mild 13.1°C (55.6°F). Weather in May »

Weather in June

The first month of the summer, June, is still a mild month in Donegal, Ireland, with temperature in the range of an average low of 9.2°C (48.6°F) and an average high of 15.4°C (59.7°F). In Donegal, the average high-temperature in June is almost the same as in May - a still moderate 15.4°C (59.7°F). Weather in June »

Weather in July

July is a comfortable summer month in Donegal, Ireland, with an average temperature fluctuating between 16.3°C (61.3°F) and 10.7°C (51.3°F). July is the warmest month, with an average high-temperature of 16.3°C (61.3°F) and an average low-temperature of 10.7°C (51.3°F). Weather in July »

Weather in August

The last month of the summer, August, is another mild month in Donegal, Ireland, with an average temperature varying between 10.8°C (51.4°F) and 15.9°C (60.6°F). In August, the average high-temperature is practically the same as in July - a mild 15.9°C (60.6°F). Weather in August »

Weather in September

The first month of the autumn, September, is still a mild month in Donegal, Ireland, with temperature in the range of an average low of 9.5°C (49.1°F) and an average high of 14.5°C (58.1°F). In Donegal, the average high-temperature in September is relatively the same as in August - a still mild 14.5°C (58.1°F). Weather in September »

Weather in October

October, like September, in Donegal, Ireland, is a cool autumn month, with an average temperature varying between 7.5°C (45.5°F) and 12.3°C (54.1°F). In October, the average high-temperature is essentially the same as in September - a fresh 12.3°C (54.1°F). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Donegal, Ireland, with an average temperature fluctuating between 8.6°C (47.5°F) and 5°C (41°F). In November, the average high-temperature marginally drops from a cool 12.3°C (54.1°F) in October to a chilly 8.6°C (47.5°F). Weather in November »

Weather in December

December, the first month of the winter in Donegal, is also a frosty month, with an average temperature fluctuating between 3.6°C (38.5°F) and 7°C (44.6°F). In Donegal, the average high-temperature in December is practically the same as in November - a still chilly 7°C (44.6°F). Weather in December »
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FAQ

What is the coldest month in Donegal?

With an average high-temperature of 6.4°C (43.5°F) and an average low-temperature of 2.9°C (37.2°F), January is the coldest month in Donegal.

What is the most humid month in Donegal?

The most humid month in Donegal, Ireland, is January, with an average relative humidity of 88%.

How much does it rain in Donegal?

Throughout the year, there are 249.6 rainfall days, and 779mm (30.67") of precipitation is accumulated.

When does it snow in Donegal?

January through March, November and December are months with snowfall.

What is the snowiest month in Donegal?

January is the month with the most snowfall in Donegal. Snow falls for 2.6 days and accumulates 41mm (1.61") of snow.

How many days does it snow in Donegal?

In Donegal, Ireland, during the entire year, snow falls for 8.9 days and aggregates up to 117mm (4.61") of snow.

What is the month with the least sunshine in Donegal?

The month with the least sunshine in Donegal is January, with an average of 3.1h of sunshine.

When is the lowest UV index in Donegal?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

When is the sea coldest in Donegal?

The month with the coldest seawater in Donegal is March, with an average sea temperature of 9.2°C (48.6°F).

When is Daylight Saving Time (DST) in Donegal?

On Sunday, 27. March 2022, at 1:00 am, Daylight Saving Time ends in Donegal, and the time zone changes from GMT to IST. The next Daylight Saving Time starts on Sunday, 30. October 2022, at 2:00 am, and the time zone reverts from IST to GMT.

What is the least humid month in Donegal?

With an average relative humidity of 82%, April is the least humid month in Donegal, Ireland.

What is the driest month in Donegal?

The month with the least rainfall is April, when the rain falls for 17.8 days and typically collects 34mm (1.34") of precipitation.

When it does not snow in Donegal?

April through October are months without snowfall.

When is the highest UV index in Donegal?

The months with the highest UV index are May and June, with an average maximum UV index of 4.

When are the longest days in Donegal?

With an average of 17h and 11min of daylight, June has the longest days of the year in Donegal, Ireland.

What month has the most sunshine in Donegal?

With an average of 6.9h of sunshine, June has the most sunshine of the year in Donegal, Ireland.

What is the warmest month in Donegal?

July is the warmest month, with an average high-temperature of 16.3°C (61.3°F) and an average low-temperature of 10.7°C (51.3°F).

What is the rainiest month in Donegal?

The month with the most rainfall is August, when the rain falls for 25.2 days and typically aggregates up to 87mm (3.43") of precipitation.

What is the month with the warmest sea water in Donegal?

August is the month with the warmest seawater, with an average sea temperature of 14.8°C (58.6°F).

What is the month with the shortest days in Donegal?

The month with the shortest days is December, with an average of 7h and 22min of daylight.

Average pressure
Donegal, Ireland

Average pressure - Donegal, Ireland

The month with the highest atmospheric pressure is May (1015.2mbar).
The month with the lowest atmospheric pressure is November (1006.7mbar).

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Average wind speed
Donegal, Ireland

Average wind speed - Donegal, Ireland

The windiest month (with the highest average wind speed) is January (22.1km/h).
The calmest month (with the lowest average wind speed) is July (13.6km/h).

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Average rainfall
Donegal, Ireland

Average rainfall - Donegal, Ireland

The wettest month (with the highest rainfall) is August (87mm).
The driest month (with the least rainfall) is April (34mm).

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Average rainfall days
Donegal, Ireland

Average rainfall days - Donegal, Ireland

The month with the highest number of rainy days is August (25.2 days).
The month with the least rainy days is April (17.8 days).

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Average snowfall
Donegal, Ireland

Average snowfall - Donegal, Ireland

The month with the highest snowfall is January (41mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days
Donegal, Ireland

Average snowfall days - Donegal, Ireland

The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature
Donegal, Ireland

Average sea temperature - Donegal, Ireland

The best month for swimming (with the highest average sea temperature) is August (14.8°C).
The coldest month (with the lowest average sea temperature) is March (9.2°C).

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Average daylight / Average sunshine
Donegal, Ireland

Average daylight / Average sunshine - Donegal, Ireland

The month with the longest days is June (Average daylight: 17h and 11min).
The month with the shortest days is December (Average daylight: 7h and 22min).

The month with the most sunshine is June (Average sunshine: 6h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).

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Average sunshine days
Donegal, Ireland

Average sunshine days - Donegal, Ireland

The month with the most sunshine days is April (9.5 days).
The month with the least sunshine days is August (3.4 days).

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Average UV index
Donegal, Ireland

Average UV index - Donegal, Ireland

The months with the highest UV index are May and June (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average visibility
Donegal, Ireland

Average visibility - Donegal, Ireland

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (9km).
The month with the lowest visibility is July (8km).

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