Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average sea temperature in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Portstewart marks the onset of August with an average high-temperature of a mild 15.9°C (60.6°F), subtly divergent from July's 16°C (60.8°F). The month of August in Portstewart shows a minor drop from daytime temperatures, generally recording a low average of 11.8°C (53.2°F).Humidity
July and August, with an average relative humidity of 86%, are the most humid months.Rainfall
The months with the most rainfall in Portstewart are July and August, with an average 74mm (2.91") of precipitation.Snowfall
May through October are months without snowfall.Sea temperature
August is the month with the warmest seawater, with an average sea temperature of 14.3°C (57.7°F).Note: Swimming in 14.3°C (57.7°F) can be lethal. Merely spending a few minutes in 13°C (55.4°F) waters feels harsh, and venturing below 10°C (50°F) might disrupt breathing control and bring about cold shock, contingent on individual resilience.
Daylight
In Portstewart, the average length of the day in August is 14h and 56min.On the first day of the month, sunrise is at 5:36 am and sunset at 9:30 pm. On the last day of August, sunrise is at 6:32 am and sunset at 8:21 pm BST.
Sunshine
In Portstewart, the average sunshine in August is 6.5h.UV index
The months with the highest UV index are May, June, August and September, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 4 in August translates into this advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What is the average August temperature in Portstewart?
What are the most humid months in Portstewart?
What is the average humidity in August in Portstewart?
What is the wettest month in Portstewart?
How many days does it rain in August in Portstewart?
When it does not snow in Portstewart?
What is the month with the warmest sea water in Portstewart?
What is the water temperature in August in Portstewart?
How many hours of daylight does Portstewart have in August?
When are sunrise and sunset in August in Portstewart?
How long on average sun shines in August in Portstewart?
What are the months with the highest UV index in Portstewart?
What is the UV index reading in August in Portstewart?
Average temperature in August
Portstewart, United Kingdom
- Average high temperature in August: 15.9°C
The warmest month (with the highest average high temperature) is July (16°C).
The month with the lowest average high temperature is January (7.1°C).
- Average low temperature in August: 11.8°C
The month with the highest average low temperature is August (11.8°C).
The coldest month (with the lowest average low temperature) is February (4°C).
Average pressure in August
Portstewart, United Kingdom
- Average pressure in August: 1011.2mbar
The month with the highest atmospheric pressure is May (1015.2mbar).
The month with the lowest atmospheric pressure is November (1006.6mbar).
Average wind speed in August
Portstewart, United Kingdom
- Average wind speed in August: 18.4km/h
The windiest month (with the highest average wind speed) is January (27.5km/h).
The calmest month (with the lowest average wind speed) is July (16.7km/h).
Average humidity in August
Portstewart, United Kingdom
- Average humidity in August: 86%
The months with the highest relative humidity are July and August (86%).
The month with the lowest relative humidity is April (81%).
Average rainfall in August
Portstewart, United Kingdom
- Average rainfall in August: 74mm
The wettest months (with the highest rainfall) are July and August (74mm).
The driest month (with the least rainfall) is April (35mm).
Average rainfall days in August
Portstewart, United Kingdom
- Average rainfall days in August: 24 days
The month with the highest number of rainy days is August (24 days).
The month with the least rainy days is April (16.8 days).
Average snowfall in August
Portstewart, United Kingdom
- Average snowfall in August: 0mm
The month with the highest snowfall is February (16mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in August
Portstewart, United Kingdom
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in August
Portstewart, United Kingdom
- Average sea temperature in August: 14.3°C
The best month for swimming (with the highest average sea temperature) is August (14.3°C).
The coldest month (with the lowest average sea temperature) is March (8.3°C).
Average daylight in August /
Average sunshine in August
Portstewart, United Kingdom
- Average daylight in August: 14h and 5min
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 12min).
- Average sunshine in August: 6h and 3min
The month with the most sunshine is June (Average sunshine: 8h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in August
Portstewart, United Kingdom
- Average sunshine days in August: 4.2 days
The month with the most sunshine days is April (9.8 days).
The month with the least sunshine days is August (4.2 days).
Average UV index in August
Portstewart, United Kingdom
- Average UV index in August: 4
The months with the highest UV index are May, June, 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
Portstewart, United Kingdom
- Average cloud cover in August: 60
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is April (Cloud cover 52).
Average visibility in August
Portstewart, United Kingdom
- Average visibility in August: 9km
The month with the highest visibility is November (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
Portstewart, United Kingdom
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