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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a frosty winter month in Portmarnock, Ireland, with an average temperature varying between 7.6°C (45.7°F) and 4°C (39.2°F). January is the month when Portmarnock, Ireland, sees the lowest average temperatures, with a high of 7.6°C (45.7°F) and a low of 4°C (39.2°F). Weather in January »
Weather in February
The last month of the winter, February, is another chilly month in Portmarnock, Ireland, with an average temperature ranging between min 3.9°C (39°F) and max 7.9°C (46.2°F). The high-temperature average in February for Portmarnock is a still frosty 7.9°C (46.2°F), staying closely aligned with January's conditions. Weather in February »
Weather in March
The first month of the spring, March, is still a chilly month in Portmarnock, Ireland, with an average temperature varying between 9°C (48.2°F) and 3.9°C (39°F). Portmarnock ushers in March with an average high-temperature of a still frosty 9°C (48.2°F), showing a close resemblance to the previous month. Weather in March »
Weather in April
April is a fresh spring month in Portmarnock, Ireland, with an average temperature fluctuating between 10.8°C (51.4°F) and 5.8°C (42.4°F). The initiation of April records an average high-temperature of a cool 10.8°C (51.4°F), displaying a near consistency with the previous month. Weather in April »
Weather in May
The last month of the spring, May, is a moderate month in Portmarnock, Ireland, with an average temperature fluctuating between 13.2°C (55.8°F) and 7.8°C (46°F). April's transformation into May witnesses an average high-temperature of a mild 13.2°C (55.8°F), noting a minor change from the preceding month. Weather in May »
Weather in June
June, the first month of the summer in Portmarnock, is still a mild month, with temperature in the range of an average high of 15.7°C (60.3°F) and an average low of 10.3°C (50.5°F). Portmarnock's weather in June, with an average high-temperature of a still refreshing 15.7°C (60.3°F), subtly shifts from May's 13.2°C (55.8°F). Weather in June »
Weather in July
July in Portmarnock, Ireland, is an enjoyable summer month, with an average temperature varying between 17.4°C (63.3°F) and 12.1°C (53.8°F). Portmarnock reaches its highest average temperatures in July, measuring 17.4°C (63.3°F) at the peak and 12.1°C (53.8°F) at the lowest. Weather in July »
Weather in August
August, the last month of the summer in Portmarnock, is another refreshing month, with an average temperature varying between 17.3°C (63.1°F) and 12.1°C (53.8°F). Shifting into August, Portmarnock records an average high-temperature of a still enjoyable 17.3°C (63.1°F), presenting minor fluctuations compared to the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is still a refreshing month in Portmarnock, Ireland, with an average temperature fluctuating between 15.6°C (60.1°F) and 10.6°C (51.1°F). The transition from August to September sees an average high-temperature of a mild 15.6°C (60.1°F), indicating a minor variance from the prior month. Weather in September »
Weather in October
October, like September, is another mild autumn month in Portmarnock, Ireland, with an average temperature ranging between max 13.4°C (56.1°F) and min 9.2°C (48.6°F). At the start of October, Portmarnock's average high-temperature reaches a still refreshing 13.4°C (56.1°F), subtly different from the preceding month. Weather in October »
Weather in November
November, the last month of the autumn in Portmarnock, is another chilly month, with temperature in the range of an average high of 9.9°C (49.8°F) and an average low of 6.3°C (43.3°F). A mild shift in the average high-temperature occurs in November, reducing from a refreshing 13.4°C (56.1°F) in October to a frosty 9.9°C (49.8°F). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Portmarnock, Ireland, with temperature in the range of an average low of 4.6°C (40.3°F) and an average high of 8.3°C (46.9°F). Portmarnock commences December with an average high-temperature of a still chilly 8.3°C (46.9°F), maintaining a close resemblance to the previous month. Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Portmarnock?
With its average high temperature of 7.6°C (45.7°F) and a low of 4°C (39.2°F), January is regarded as the coldest month.
How many days does it rain in Portmarnock?
Throughout the year, in Portmarnock, there are 159.4 rainfall days, and 362mm (14.25") of precipitation is accumulated.
When does it snow in Portmarnock?
January through March, November and December are months with snowfall in Portmarnock, Ireland.
How much does it snow in Portmarnock?
Throughout the year, there are 6 snowfall days, and 31mm (1.22") of snow is accumulated.
What is the month with the least sunshine in Portmarnock?
The months with the least sunshine are January, February and November, with an average of 4.3h of sunshine.
What is the month with the lowest UV index in Portmarnock?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the least humid month in Portmarnock?
The months with the lowest humidity are March through May, with an average relative humidity of 83%.
What is the month with the coldest sea water in Portmarnock?
The month with the coldest seawater in Portmarnock, Ireland, is March, with an average sea temperature of 8.4°C (47.1°F).
When it does not snow in Portmarnock?
April through October are months without snowfall in Portmarnock.
What is the month with the most sunshine in Portmarnock?
April through June, with an average of 7.5h of sunshine, are months with the most sunshine in Portmarnock.
What is the driest month in Portmarnock?
May is the month with the least rainfall in Portmarnock. Rain falls for 13.3 days and accumulates 19mm (0.75") of precipitation.
When is the highest UV index in Portmarnock?
The months with the highest UV index are May through September, with an average maximum UV index of 4.
When are the longest days in Portmarnock?
With an average of 16h and 54min of daylight, June has the longest days of the year.
What time of the year is the hottest in Portmarnock?
Portmarnock's temperatures peak on average in July, reaching 17.4°C (63.3°F) at their highest and 12.1°C (53.8°F) at their lowest.
What are the most humid months in Portmarnock?
The months with the highest humidity in Portmarnock, Ireland, are July and December, with an average relative humidity of 86%.
What is the month with the warmest sea water in Portmarnock?
August is the month with the warmest seawater in Portmarnock, Ireland, with an average sea temperature of 14.9°C (58.8°F).
When is Daylight Saving Time (DST) in Portmarnock?
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time starts in Portmarnock, 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.
What is the wettest month in Portmarnock?
November is the month with the most rainfall in Portmarnock. Rain falls for 14 days and accumulates 51mm (2.01") of precipitation.
When does it snow the most in Portmarnock?
December is the month with the most snowfall. Snow falls for 0.9 days and accumulates 12mm (0.47") of snow.
What is the month with the shortest days in Portmarnock?
December has the shortest days of the year, with an average of 7h and 36min of daylight.
Average temperature
Portmarnock, Ireland
The warmest month (with the highest average high temperature) is July (17.4°C).
The month with the lowest average high temperature is January (7.6°C).
The months with the highest average low temperature are July and August (12.1°C).
The coldest months (with the lowest average low temperature) are February and March (3.9°C).
Average pressure
Portmarnock, Ireland
- Average pressure in January:
1011.4mbar - Average pressure in February:
1011mbar - Average pressure in March:
1014.1mbar - Average pressure in April:
1014.7mbar - Average pressure in May:
1016mbar - Average pressure in June:
1015.2mbar
- Average pressure in July:
1013.9mbar - Average pressure in August:
1012.8mbar - Average pressure in September:
1015.2mbar - Average pressure in October:
1012.6mbar - Average pressure in November:
1008.2mbar - Average pressure in December:
1010.9mbar
The month with the highest atmospheric pressure is May (1016mbar).
The month with the lowest atmospheric pressure is November (1008.2mbar).
Average wind speed
Portmarnock, Ireland
- Average wind speed in January:
24.2km/h - Average wind speed in February:
23.4km/h - Average wind speed in March:
20.7km/h - Average wind speed in April:
17.8km/h - Average wind speed in May:
17.4km/h - Average wind speed in June:
15.2km/h
- Average wind speed in July:
15.3km/h - Average wind speed in August:
16.9km/h - Average wind speed in September:
18.1km/h - Average wind speed in October:
19.6km/h - Average wind speed in November:
22.6km/h - Average wind speed in December:
24.1km/h
The windiest month (with the highest average wind speed) is January (24.2km/h).
The calmest month (with the lowest average wind speed) is June (15.2km/h).
Average humidity
Portmarnock, Ireland
The months with the highest relative humidity are July and December (86%).
The months with the lowest relative humidity are March, April and May (83%).
Average rainfall
Portmarnock, Ireland
The wettest month (with the highest rainfall) is November (51mm).
The driest month (with the least rainfall) is May (19mm).
Average rainfall days
Portmarnock, Ireland
- Average rainfall days in January:
11.5 days - Average rainfall days in February:
10.7 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
13.3 days - Average rainfall days in June:
14.9 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
15.3 days - Average rainfall days in September:
10.9 days - Average rainfall days in October:
14 days - Average rainfall days in November:
14 days - Average rainfall days in December:
11.8 days
The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is February (10.7 days).
Average snowfall
Portmarnock, Ireland
The month with the highest snowfall is December (12mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
Portmarnock, Ireland
- Average snowfall days in January:
1.8 days - Average snowfall days in February:
2.1 days - Average snowfall days in March:
0.7 days - Average snowfall days in April:
0.1 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 days - Average snowfall days in November:
0.4 days - Average snowfall days in December:
0.9 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature
Portmarnock, Ireland
The best month for swimming (with the highest average sea temperature) is August (14.9°C).
The coldest month (with the lowest average sea temperature) is March (8.4°C).
Average daylight / Average sunshine
Portmarnock, Ireland
- Average daylight in January:
8h and 1min - Average daylight in February:
9h and 5min - Average daylight in March:
11h and 5min - Average daylight in April:
14h and 0min - Average daylight in May:
15h and 5min - Average daylight in June:
16h and 5min
- Average daylight in July:
16h and 2min - Average daylight in August:
14h and 4min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 4min - Average daylight in November:
8h and 4min - Average daylight in December:
7h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 2min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 3min - Average sunshine in May:
7h and 3min - Average sunshine in June:
7h and 3min
- Average sunshine in July:
7h and 0min - Average sunshine in August:
7h and 2min - Average sunshine in September:
7h and 0min - Average sunshine in October:
4h and 2min - Average sunshine in November:
4h and 2min - Average sunshine in December:
4h and 4min
The months with the most sunshine are April, May and June (Average sunshine: 7h and 30min).
The months with the least sunshine are January, February and November (Average sunshine: 4h and 18min).
Average sunshine days
Portmarnock, Ireland
- Average sunshine days in January:
16.8 days - Average sunshine days in February:
13.4 days - Average sunshine days in March:
15.5 days - Average sunshine days in April:
14.2 days - Average sunshine days in May:
14.9 days - Average sunshine days in June:
12.4 days
- Average sunshine days in July:
11 days - Average sunshine days in August:
12.3 days - Average sunshine days in September:
16.4 days - Average sunshine days in October:
13.3 days - Average sunshine days in November:
13.6 days - Average sunshine days in December:
16.8 days
The months with the most sunshine days are January and December (16.8 days).
The month with the least sunshine days is July (11 days).
Average UV index
Portmarnock, Ireland
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Portmarnock, Ireland
The months with the most cloud cover are January and February (Cloud cover 57).
The months with the least cloud cover are April and September (Cloud cover 50).
Average visibility
Portmarnock, Ireland
The months with the highest visibility are January, February, March, October, November and December (10km).
The months with the lowest visibility are April, May, June, July, August and September (9km).
Portmarnock, Ireland
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