Climate and monthly weather forecastLettermakenny, Ireland
Climate and monthly weather forecast
Weather in January
January, the same as December, is another cold winter month in Lettermakenny, Ireland, with an average temperature ranging between max 5.9°C (42.6°F) and min 1.7°C (35.1°F). January is Lettermakenny's coldest month, registering average high temperatures of 5.9°C (42.6°F) and lows of 1.7°C (35.1°F). Weather in January »Weather in February
February, the last month of the winter in Lettermakenny, is a frosty month, with an average temperature ranging between min 1.6°C (34.9°F) and max 6.8°C (44.2°F). With the advent of February, Lettermakenny's high-temperatures adjust to a chilly 6.8°C (44.2°F), closely aligning with the preceding month. Weather in February »Weather in March
March, the first month of the spring in Lettermakenny, is still a chilly month, with an average temperature fluctuating between 8.4°C (47.1°F) and 2.2°C (36°F). The onset of March brings an average high-temperature of a still chilly 8.4°C (47.1°F), nearly matching the February temperature. Weather in March »Weather in April
April is a cool spring month in Lettermakenny, Ireland, with temperature in the range of an average high of 11.1°C (52°F) and an average low of 3.5°C (38.3°F). The average high-temperature during April registers at a fresh 11.1°C (52°F), closely corresponding to the preceding month. Weather in April »Weather in May
May, the last month of the spring in Lettermakenny, is a mild month, with an average temperature fluctuating between 13.2°C (55.8°F) and 5.7°C (42.3°F). May's onset brings an average high-temperature of a moderate 13.2°C (55.8°F), showing a minute difference from April's 11.1°C (52°F). Weather in May »Weather in June
June, the first month of the summer in Lettermakenny, is still a refreshing month, with an average temperature varying between 15.8°C (60.4°F) and 8.3°C (46.9°F). As Lettermakenny welcomes June, the average high-temperature stabilizes at a still mild 15.8°C (60.4°F), showing little deviation from May's 13.2°C (55.8°F). Weather in June »Weather in July
July is a refreshing summer month in Lettermakenny, Ireland, with temperature in the range of an average high of 16.6°C (61.9°F) and an average low of 9.9°C (49.8°F). Lettermakenny's temperatures peak on average in July, reaching 16.6°C (61.9°F) at their highest and 9.9°C (49.8°F) at their lowest. Weather in July »Weather in August
August, the last month of the summer in Lettermakenny, is another comfortable month, with temperature in the range of an average high of 16.3°C (61.3°F) and an average low of 9.8°C (49.6°F). The initiation of August records an average high-temperature of a still comfortable 16.3°C (61.3°F), displaying a near consistency with the previous month. Weather in August »Weather in September
The first month of the autumn, September, is still a mild month in Lettermakenny, Ireland, with temperature in the range of an average low of 8.4°C (47.1°F) and an average high of 14.5°C (58.1°F). Lettermakenny's average high-temperature marks a still refreshing 14.5°C (58.1°F) with the advent of September, closely mirroring that of the preceding month. Weather in September »Weather in October
October, like September, in Lettermakenny, Ireland, is a cool autumn month, with an average temperature ranging between max 12.2°C (54°F) and min 6.5°C (43.7°F). The arrival of October coincides with an average high-temperature of a fresh 12.2°C (54°F), indicating a minimal shift from September's 14.5°C (58.1°F). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Lettermakenny, Ireland, with an average temperature ranging between min 4°C (39.2°F) and max 8.2°C (46.8°F). In Lettermakenny, the average high-temperature in November gently drops from a cool 12.2°C (54°F) in October to a chilly 8.2°C (46.8°F). Weather in November »Weather in December
December, the first month of the winter in Lettermakenny, is also a frosty month, with an average temperature fluctuating between 2.3°C (36.1°F) and 6.3°C (43.3°F). In December, the average high-temperature registers at a still frosty 6.3°C (43.3°F), nearly identical to November's 8.2°C (46.8°F). Weather in December »Updated: Jan 29, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Lettermakenny, January is the coldest month, with temperatures averaging a high of 5.9°C (42.6°F) and a low of 1.7°C (35.1°F).
Throughout the year, there are 240.4 rainfall days, and 703mm (27.68") of precipitation is accumulated.
January through April, November and December are months with snowfall in Lettermakenny, Ireland.
Throughout the year, in Lettermakenny, there are 11.5 snowfall days, and 135mm (5.31") of snow is accumulated.
The month with the least sunshine is January, with an average of 3.1h of sunshine.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
The month with the most snowfall in Lettermakenny, Ireland, is February, when snow falls for 3.5 days and typically aggregates up to 51mm (2.01") of snow.
The least humid month is April, with an average relative humidity of 84%.
The month with the least rainfall is April, when the rain falls for 18.4 days and typically collects 39mm (1.54") of precipitation.
In Lettermakenny, snow does not fall in May through October.
June has the longest days of the year in Lettermakenny, Ireland, with an average of 17h and 18min of daylight.
With an average of 6.2h of sunshine, June has the most sunshine of the year in Lettermakenny, Ireland.
June is the month with the highest UV index in Lettermakenny, Ireland, with an average maximum UV index of 4.
The highest temperatures in Lettermakenny, Ireland, are recorded in July, with averages reaching a high of 16.6°C (61.9°F) and a low of 9.9°C (49.8°F).
August is the month with the most rainfall. Rain falls for 25.6 days and accumulates 81mm (3.19") of precipitation.
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time starts in Lettermakenny, Ireland, and the time zone changes from IST to GMT. Daylight Saving Time ends on Sunday, 30. March 2025, at 1:00 am, and the time zone reverts from GMT to IST.
With an average relative humidity of 91%, December is the most humid month in Lettermakenny, Ireland.
With an average of 7h and 18min of daylight, December has the shortest days of the year.
Average temperature
Lettermakenny, Ireland
The warmest month (with the highest average high temperature) is July (16.6°C).
The month with the lowest average high temperature is January (5.9°C).
The month with the highest average low temperature is July (9.9°C).
The coldest month (with the lowest average low temperature) is February (1.6°C).
Average pressure
Lettermakenny, Ireland
- Average pressure in January:
1009.2mbar - Average pressure in February:
1009.2mbar - Average pressure in March:
1012.9mbar - Average pressure in April:
1014.3mbar - Average pressure in May:
1015.3mbar - Average pressure in June:
1014.8mbar
- Average pressure in July:
1013mbar - Average pressure in August:
1011.4mbar - Average pressure in September:
1013.8mbar - Average pressure in October:
1011.2mbar - Average pressure in November:
1006.8mbar - Average pressure in December:
1008.6mbar
The month with the highest atmospheric pressure is May (1015.3mbar).
The month with the lowest atmospheric pressure is November (1006.8mbar).
Average wind speed
Lettermakenny, Ireland
- Average wind speed in January:
17.8km/h - Average wind speed in February:
17.1km/h - Average wind speed in March:
16.6km/h - Average wind speed in April:
14.2km/h - Average wind speed in May:
13.9km/h - Average wind speed in June:
11.9km/h
- Average wind speed in July:
11.5km/h - Average wind speed in August:
12.4km/h - Average wind speed in September:
13.1km/h - Average wind speed in October:
14.2km/h - Average wind speed in November:
15km/h - Average wind speed in December:
16.9km/h
The windiest month (with the highest average wind speed) is January (17.8km/h).
The calmest month (with the lowest average wind speed) is July (11.5km/h).
Average humidity
Lettermakenny, Ireland
The month with the highest relative humidity is December (91%).
The month with the lowest relative humidity is April (84%).
Average rainfall
Lettermakenny, Ireland
The wettest month (with the highest rainfall) is August (81mm).
The driest month (with the least rainfall) is April (39mm).
Average rainfall days
Lettermakenny, Ireland
- Average rainfall days in January:
18.8 days - Average rainfall days in February:
15.8 days - Average rainfall days in March:
19.6 days - Average rainfall days in April:
18.4 days - Average rainfall days in May:
20.8 days - Average rainfall days in June:
22 days
- Average rainfall days in July:
24.8 days - Average rainfall days in August:
25.6 days - Average rainfall days in September:
20.3 days - Average rainfall days in October:
17.5 days - Average rainfall days in November:
17.5 days - Average rainfall days in December:
19.3 days
The month with the highest number of rainy days is August (25.6 days).
The month with the least rainy days is February (15.8 days).
Average snowfall
Lettermakenny, Ireland
The month with the highest snowfall is February (51mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days
Lettermakenny, Ireland
- Average snowfall days in January:
3.4 days - Average snowfall days in February:
3.5 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
0.3 days - Average snowfall days in December:
1.6 days
The month with the highest number of snowfall days is February (3.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Lettermakenny, Ireland
- Average daylight in January:
7h and 54min - Average daylight in February:
9h and 42min - Average daylight in March:
11h and 54min - Average daylight in April:
14h and 12min - Average daylight in May:
16h and 12min - Average daylight in June:
17h and 18min
- Average daylight in July:
16h and 42min - Average daylight in August:
14h and 54min - Average daylight in September:
12h and 42min - Average daylight in October:
10h and 30min - Average daylight in November:
8h and 24min - Average daylight in December:
7h and 18min
The month with the longest days is June (Average daylight: 17h and 18min).
The month with the shortest days is December (Average daylight: 7h and 18min).
- Average sunshine in January:
3h and 6min - Average sunshine in February:
3h and 18min - Average sunshine in March:
4h and 6min - Average sunshine in April:
5h and 48min - Average sunshine in May:
5h and 36min - Average sunshine in June:
6h and 12min
- Average sunshine in July:
5h and 18min - Average sunshine in August:
4h and 42min - Average sunshine in September:
4h and 36min - Average sunshine in October:
3h and 24min - Average sunshine in November:
3h and 30min - Average sunshine in December:
3h and 30min
The month with the most sunshine is June (Average sunshine: 6h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days
Lettermakenny, Ireland
- Average sunshine days in January:
8.3 days - Average sunshine days in February:
8.1 days - Average sunshine days in March:
8.3 days - Average sunshine days in April:
8.5 days - Average sunshine days in May:
7.4 days - Average sunshine days in June:
5.5 days
- Average sunshine days in July:
3.9 days - Average sunshine days in August:
3.3 days - Average sunshine days in September:
5.6 days - Average sunshine days in October:
9.7 days - Average sunshine days in November:
9.8 days - Average sunshine days in December:
8.9 days
The month with the most sunshine days is November (9.8 days).
The month with the least sunshine days is August (3.3 days).
Average UV index
Lettermakenny, Ireland
The month with the highest UV index is June (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Lettermakenny, Ireland
The month with the most cloud cover is August (Cloud cover 74).
The month with the least cloud cover is April (Cloud cover 61).
Average visibility
Lettermakenny, Ireland
The month with the highest visibility is March (9km).
The months with the lowest visibility are July, August and September (7km).
