August weather forecastPortmarnock, Ireland
August weather for Portmarnock, Ireland: August is the month with the warmest seawater in Portmarnock, Ireland, with an average sea temperature of 14.9°C (58.8°F). 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).
August
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).Temperature
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. An average low-temperature of 12.1°C (53.8°F) is observed during the August nights.Humidity
The average relative humidity in August is 85%.Rainfall
In Portmarnock, Ireland, during August, the rain falls for 15.3 days and regularly aggregates up to 36mm (1.42") of precipitation. Throughout the year, there are 159.4 rainfall days, and 362mm (14.25") of precipitation is accumulated.Snowfall
April through October are months without snowfall in Portmarnock.Sea temperature
With an average sea temperature of 14.9°C (58.8°F), August is the month with the warmest seawater in Portmarnock.Note: Swimming in 14.9°C (58.8°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.
Daylight
In August, the average length of the day is 14h and 44min.On the first day of August in Portmarnock, sunrise is at 5:41 am and sunset at 9:20 pm. On the last day of the month, sunrise is at 6:33 am and sunset at 8:16 pm IST.
Sunshine
In August, the average sunshine in Portmarnock is 7.4h.UV index
The months with the highest UV index in Portmarnock are May through September, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 4 in August leads to these recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Portmarnock, Ireland
- Average high temperature in August: 17.3°C
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).
- Average low temperature in August: 12.1°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 in August
Portmarnock, Ireland
- Average pressure in August: 1012.8mbar
The month with the highest atmospheric pressure is May (1016mbar).
The month with the lowest atmospheric pressure is November (1008.2mbar).
Average wind speed in August
Portmarnock, Ireland
- Average wind speed in August: 16.9km/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 in August
Portmarnock, Ireland
- Average humidity in August: 85%
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 in August
Portmarnock, Ireland
- Average rainfall in August: 36mm
The wettest month (with the highest rainfall) is November (51mm).
The driest month (with the least rainfall) is May (19mm).
Average rainfall days in August
Portmarnock, Ireland
- Average rainfall days in August: 15.3 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 in August
Portmarnock, Ireland
- Average snowfall in August: 0mm
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 in August
Portmarnock, Ireland
- Average snowfall days in August: 0 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 in August
Portmarnock, Ireland
- Average sea temperature in August: 14.9°C
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 in August /
Average sunshine in August
Portmarnock, Ireland
- Average daylight in August: 14h and 42min
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 August: 7h and 24min
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 in August
Portmarnock, Ireland
- Average sunshine days in August: 12.3 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 in August
Portmarnock, Ireland
- Average UV index in August: 4
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 in August
Portmarnock, Ireland
- Average cloud cover in August: 53
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 in August
Portmarnock, Ireland
- Average visibility in August: 9km
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).
