Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average snowfall in July
- Average snowfall days in July
- Average sea temperature in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
July
Weather in July
Temperature
July is the month when Portstewart's temperatures reach their peak, with averages of 16°C (60.8°F) and lows of 11.7°C (53.1°F).Humidity
July and August, with an average relative humidity of 86%, are the most humid months.Rainfall
The months with the most rainfall are July and August, with an average 74mm (2.91") of precipitation.Snowfall
In Portstewart, snow does not fall in May through October.Sea temperature
In July, the average sea temperature is 13.4°C (56.1°F).Note: It is advised against swimming in 13.4°C (56.1°F) when it drops below 10°C (50°F). Such temperatures can cause extreme cold shock, leading to hyperventilation.
Daylight
The average length of the day in July is 16h and 45min.On the first day of the month, sunrise is at 4:51 am and sunset at 10:10 pm. On the last day of July, sunrise is at 5:34 am and sunset at 9:32 pm BST.
Sunshine
The average sunshine in July is 7h.UV index
In July, the average daily maximum UV index in Portstewart, United Kingdom, is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 3 during July leads to these advisories:
Ensure safety - Recommendations to avert sunburn are presented. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the hottest in Portstewart?
What is the usual temperature for Portstewart in July?
What is the most humid month in Portstewart?
What is the average humidity in July in Portstewart?
What is the rainiest month in Portstewart?
How much does it rain in Portstewart in July?
When it does not snow in Portstewart?
How cold is the water in July in Portstewart?
What is the average length of the day in July in Portstewart?
What time are sunrise and sunset in July in Portstewart?
How many hours of sunshine does Portstewart have in July?
What is the UV index reading in July in Portstewart?
Average temperature in July
Portstewart, United Kingdom
- Average high temperature in July: 16°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 July: 11.7°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 July
Portstewart, United Kingdom
- Average pressure in July: 1012.8mbar
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 July
Portstewart, United Kingdom
- Average wind speed in July: 16.7km/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 July
Portstewart, United Kingdom
- Average humidity in July: 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 July
Portstewart, United Kingdom
- Average rainfall in July: 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 July
Portstewart, United Kingdom
- Average rainfall days in July: 22.6 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 July
Portstewart, United Kingdom
- Average snowfall in July: 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 July
Portstewart, United Kingdom
- Average snowfall days in July: 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 July
Portstewart, United Kingdom
- Average sea temperature in July: 13.4°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 July /
Average sunshine in July
Portstewart, United Kingdom
- Average daylight in July: 16h 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 July: 7h and 0min
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 July
Portstewart, United Kingdom
- Average sunshine days in July: 5.3 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 July
Portstewart, United Kingdom
- Average UV index in July: 3
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 July
Portstewart, United Kingdom
- Average cloud cover in July: 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 July
Portstewart, United Kingdom
- Average visibility in July: 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).
