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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 daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Climate and monthly weather forecast
Weather in January
January, like December, is a frosty winter month in Portnahaven, United Kingdom, with an average temperature varying between 8.3°C (46.9°F) and 6.5°C (43.7°F). With the advent of January, Portnahaven experiences an average high-temperature of a still chilly 8.3°C (46.9°F), mirroring a close resemblance to the previous month. Weather in January »
Weather in February
February, the last month of the winter in Portnahaven, is another chilly month, with an average temperature varying between 7.8°C (46°F) and 6°C (42.8°F). February is Portnahaven's coldest month, registering average high temperatures of 7.8°C (46°F) and lows of 6°C (42.8°F). Weather in February »
Weather in March
The first month of the spring, March, is also a frosty month in Portnahaven, United Kingdom, with an average temperature varying between 6.3°C (43.3°F) and 8.3°C (46.9°F). March's arrival brings an average high-temperature of a still frosty 8.3°C (46.9°F), slightly deviating from February's 7.8°C (46°F). Weather in March »
Weather in April
April, like March, is another chilly spring month in Portnahaven, United Kingdom, with temperature in the range of an average low of 7.3°C (45.1°F) and an average high of 9.5°C (49.1°F). As April unfolds, the average high-temperature reaches a still frosty 9.5°C (49.1°F), hinting at a slight fluctuation from the previous month. Weather in April »
Weather in May
May, the last month of the spring in Portnahaven, is a cool month, with an average temperature varying between 11.3°C (52.3°F) and 9°C (48.2°F). May's arrival shows an average high-temperature of a cool 11.3°C (52.3°F), hardly different from the previous month. Weather in May »
Weather in June
The first month of the summer, June, is a moderate month in Portnahaven, United Kingdom, with an average temperature fluctuating between 11.4°C (52.5°F) and 13.4°C (56.1°F). The unfolding of June shows an average high-temperature of a mild 13.4°C (56.1°F), indicating a slight variance from May's 11.3°C (52.3°F). Weather in June »
Weather in July
July, like June, is a moderate summer month in Portnahaven, United Kingdom, with an average temperature ranging between max 14.8°C (58.6°F) and min 12.7°C (54.9°F). 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). Weather in July »
Weather in August
The last month of the summer, August, is also a moderate month in Portnahaven, United Kingdom, with an average temperature fluctuating between 15.3°C (59.5°F) and 13.4°C (56.1°F). August, characterized by an average high temperature of 15.3°C (59.5°F) and a low temperature of 13.4°C (56.1°F), is generally the warmest month. Weather in August »
Weather in September
September, the first month of the autumn in Portnahaven, is still a refreshing month, with an average temperature ranging between min 13°C (55.4°F) and max 14.5°C (58.1°F). September's presence marks an average high-temperature of a still refreshing 14.5°C (58.1°F), subtly varied from August's 15.3°C (59.5°F). Weather in September »
Weather in October
October, like September, in Portnahaven, United Kingdom, is another fresh autumn month, with temperature in the range of an average low of 11.1°C (52°F) and an average high of 12.9°C (55.2°F). Portnahaven notes an average high-temperature of a cool 12.9°C (55.2°F) in October, hardly diverging from September. Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Portnahaven, United Kingdom, with temperature in the range of an average high of 10.8°C (51.4°F) and an average low of 8.9°C (48°F). November begins with an average high-temperature of a still cool 10.8°C (51.4°F), reflecting close similarity to the preceding month. Weather in November »
Weather in December
December, the first month of the winter in Portnahaven, is also a frosty month, with temperature in the range of an average high of 9.5°C (49.1°F) and an average low of 7.4°C (45.3°F). The arrival of December denotes a barely perceptible change in the average high-temperatures to a chilly 9.5°C (49.1°F) from November's 10.8°C (51.4°F). Weather in December »
Updated: Feb 7, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How much does it rain in Portnahaven?
In Portnahaven, United Kingdom, during the entire year, the rain falls for 238.1 days and collects up to 631mm (24.84") of precipitation.
When it does not snow in Portnahaven?
In Portnahaven, snow does not fall in January, March through November.
How much does it snow in Portnahaven?
Throughout the year, 3mm (0.12") of snow is accumulated.
What is the month with the least sunshine in Portnahaven?
With an average of 3.5h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Portnahaven?
The months with the lowest UV index are January, February and November, with an average maximum UV index of 2.
What are the coldest months in Portnahaven?
With an average high-temperature of 7.8°C (46°F) and an average low-temperature of 6°C (42.8°F), February is the coldest month.
When does it snow in Portnahaven?
February and December are months with snowfall in Portnahaven.
What is the driest month in Portnahaven?
The month with the least rainfall is April, when the rain falls for 15.4 days and typically collects 24mm (0.94") of precipitation.
What are the months with the highest UV index in Portnahaven?
May through August, with an average maximum UV index of 4, are months with the highest UV index in Portnahaven, United Kingdom.
What is the most humid month in Portnahaven?
The months with the highest humidity in Portnahaven are June through August, with an average relative humidity of 84%.
When are the longest days in Portnahaven?
June has the longest days of the year, with an average of 17h and 24min of daylight.
What month has the most sunshine in Portnahaven?
June has the most sunshine of the year in Portnahaven, United Kingdom, with an average of 8.6h of sunshine.
What time of the year is the hottest in Portnahaven?
August, recording an average high temperature of 15.3°C (59.5°F) and a low temperature of 13.4°C (56.1°F), is Portnahaven's warmest month.
When is Daylight Saving Time (DST) in Portnahaven?
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time ends, and the time zone changes from BST to GMT. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 1:00 am, and the time zone reverts from GMT to BST.
What is the least humid month in Portnahaven?
With an average relative humidity of 76%, November is the least humid month.
What is the rainiest month in Portnahaven?
December is the month with the most rainfall in Portnahaven, United Kingdom. Rain falls for 23.8 days and accumulates 74mm (2.91") of precipitation.
When does it snow the most in Portnahaven?
The month with the most snowfall in Portnahaven, United Kingdom, is December, when snow falls for 0.5 days and typically aggregates up to 2mm (0.08") of snow.
What is the month with the shortest days in Portnahaven?
The month with the shortest days is December, with an average of 7h and 6min of daylight.
Average temperature
Portnahaven, United Kingdom
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).
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
Portnahaven, United Kingdom
- Average pressure in January:
1008.3mbar - Average pressure in February:
1008.5mbar - Average pressure in March:
1012.2mbar - Average pressure in April:
1014.1mbar - Average pressure in May:
1015.1mbar - Average pressure in June:
1014.5mbar
- Average pressure in July:
1012.5mbar - Average pressure in August:
1010.9mbar - Average pressure in September:
1013.1mbar - Average pressure in October:
1010.9mbar - Average pressure in November:
1006.3mbar - Average pressure in December:
1007.6mbar
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
Portnahaven, United Kingdom
- Average wind speed in January:
38km/h - Average wind speed in February:
35.1km/h - Average wind speed in March:
31.6km/h - Average wind speed in April:
26.3km/h - Average wind speed in May:
25.3km/h - Average wind speed in June:
21.8km/h
- Average wind speed in July:
22.2km/h - Average wind speed in August:
25km/h - Average wind speed in September:
29.7km/h - Average wind speed in October:
32.4km/h - Average wind speed in November:
34.9km/h - Average wind speed in December:
37.8km/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
Portnahaven, United Kingdom
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
Portnahaven, United Kingdom
The wettest month (with the highest rainfall) is December (74mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days
Portnahaven, United Kingdom
- Average rainfall days in January:
23.2 days - Average rainfall days in February:
17.8 days - Average rainfall days in March:
18.3 days - Average rainfall days in April:
15.4 days - Average rainfall days in May:
17.6 days - Average rainfall days in June:
16.5 days
- Average rainfall days in July:
20.3 days - Average rainfall days in August:
21.5 days - Average rainfall days in September:
20.3 days - Average rainfall days in October:
20.3 days - Average rainfall days in November:
23.1 days - Average rainfall days in December:
23.8 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
Portnahaven, United Kingdom
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
Portnahaven, United Kingdom
- Average snowfall days in January:
0 days - Average snowfall days in February:
0.4 days - Average snowfall days in March:
0.2 days - Average snowfall days in April:
0 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 days - Average snowfall days in December:
0.5 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 / Average sunshine
Portnahaven, United Kingdom
- Average daylight in January:
7h and 5min - Average daylight in February:
9h and 4min - Average daylight in March:
11h and 5min - Average daylight in April:
14h and 1min - Average daylight in May:
16h and 2min - Average daylight in June:
17h and 2min
- Average daylight in July:
16h and 5min - Average daylight in August:
15h and 0min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 2min - Average daylight in November:
8h and 2min - Average daylight in December:
7h and 1min
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 January:
3h and 3min - Average sunshine in February:
3h and 4min - Average sunshine in March:
5h and 0min - Average sunshine in April:
7h and 4min - Average sunshine in May:
7h and 4min - Average sunshine in June:
8h and 4min
- Average sunshine in July:
7h and 4min - Average sunshine in August:
7h and 1min - Average sunshine in September:
6h and 1min - Average sunshine in October:
3h and 5min - Average sunshine in November:
3h and 5min - Average sunshine in December:
3h 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
Portnahaven, United Kingdom
- Average sunshine days in January:
4.9 days - Average sunshine days in February:
7.1 days - Average sunshine days in March:
8.3 days - Average sunshine days in April:
11.3 days - Average sunshine days in May:
10.7 days - Average sunshine days in June:
10.4 days
- Average sunshine days in July:
8.7 days - Average sunshine days in August:
6.3 days - Average sunshine days in September:
6.5 days - Average sunshine days in October:
6.6 days - Average sunshine days in November:
4.1 days - Average sunshine days in December:
4.4 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
Portnahaven, United Kingdom
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
Portnahaven, United Kingdom
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
Portnahaven, United Kingdom
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).
