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 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
Weather in July
Temperature
Portnahaven observes a minor difference in average high-temperatures between June's 13.4°C (56.1°F) and July's 14.8°C (58.6°F). During July, Portnahaven's nighttime temperatures demonstrate a subtle cooling from daytime highs, stabilizing at a cool 12.7°C (54.9°F).Humidity
The months with the highest humidity are June through August, with an average relative humidity of 84%.Rainfall
In Portnahaven, during July, the rain falls for 20.3 days and regularly aggregates up to 63mm (2.48") of precipitation. In Portnahaven, during the entire year, the rain falls for 238.1 days and collects up to 631mm (24.84") of precipitation.Snowfall
In Portnahaven, snow does not fall in January, March through November.Daylight
The average length of the day in July in Portnahaven is 16h and 52min.On the first day of July, sunrise is at 4:47 am and sunset at 10:12 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 9:33 pm BST.
Sunshine
In July, the average sunshine in Portnahaven is 7.7h.UV index
May through August, with an average maximum UV index of 4, are months with the highest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 during July translates into the following directions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average July temperature in Portnahaven?
What are the most humid months in Portnahaven?
What is the average humidity in July in Portnahaven?
How much does it rain in Portnahaven in July?
When it does not snow in Portnahaven?
What is the average length of the day in July in Portnahaven?
What time are sunrise and sunset in July in Portnahaven?
How many hours of sunshine does Portnahaven have in July?
What is the month with the highest UV index in Portnahaven?
What is the UV index reading in July in Portnahaven?
Average temperature in July
Portnahaven, United Kingdom
- Average high temperature in July: 14.8°C
The warmest month (with the highest average high temperature) is August (15.3°C).
The month with the lowest average high temperature is February (7.8°C).
- Average low temperature in July: 12.7°C
The month with the highest average low temperature is August (13.4°C).
The coldest month (with the lowest average low temperature) is February (6°C).
Average pressure in July
Portnahaven, United Kingdom
- Average pressure in July: 1012.5mbar
The month with the highest atmospheric pressure is May (1015.1mbar).
The month with the lowest atmospheric pressure is November (1006.3mbar).
Average wind speed in July
Portnahaven, United Kingdom
- Average wind speed in July: 22.2km/h
The windiest month (with the highest average wind speed) is January (38km/h).
The calmest month (with the lowest average wind speed) is June (21.8km/h).
Average humidity in July
Portnahaven, United Kingdom
- Average humidity in July: 84%
The months with the highest relative humidity are June, July and August (84%).
The month with the lowest relative humidity is November (76%).
Average rainfall in July
Portnahaven, United Kingdom
- Average rainfall in July: 63mm
The wettest month (with the highest rainfall) is December (74mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in July
Portnahaven, United Kingdom
- Average rainfall days in July: 20.3 days
The month with the highest number of rainy days is December (23.8 days).
The month with the least rainy days is April (15.4 days).
Average snowfall in July
Portnahaven, United Kingdom
- Average snowfall in July: 0mm
The month with the highest snowfall is December (2mm).
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in July
Portnahaven, United Kingdom
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is December (0.5 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October and November (0 days).
Average daylight in July /
Average sunshine in July
Portnahaven, United Kingdom
- Average daylight in July: 16h and 5min
The month with the longest days is June (Average daylight: 17h and 24min).
The month with the shortest days is December (Average daylight: 7h and 6min).
- Average sunshine in July: 7h and 4min
The month with the most sunshine is June (Average sunshine: 8h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in July
Portnahaven, United Kingdom
- Average sunshine days in July: 8.7 days
The month with the most sunshine days is April (11.3 days).
The month with the least sunshine days is November (4.1 days).
Average UV index in July
Portnahaven, United Kingdom
- Average UV index in July: 4
The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January, February and November (UV index 2).
Average cloud cover in July
Portnahaven, United Kingdom
- Average cloud cover in July: 57
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are April and May (Cloud cover 51).
Average visibility in July
Portnahaven, United Kingdom
- Average visibility in July: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Portnahaven, United Kingdom
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