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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 another chilly winter month in Onllwyn, United Kingdom, with an average temperature fluctuating between 7.3°C (45.1°F) and 3.9°C (39°F). The months of January and February are noted for their lowest temperatures, with an average high-temperature of 7.3°C (45.1°F). Weather in January »
Weather in February
February, the last month of the winter in Onllwyn, is also a frosty month, with temperature in the range of an average low of 3.8°C (38.8°F) and an average high of 7.3°C (45.1°F). The months of January and February see the lowest levels of Onllwyn's temperatures, averaging a high of 7.3°C (45.1°F). Weather in February »
Weather in March
The first month of the spring, March, is also a frosty month in Onllwyn, United Kingdom, with temperature in the range of an average low of 4°C (39.2°F) and an average high of 9.4°C (48.9°F). The transition into March notes an average high-temperature of a still frosty 9.4°C (48.9°F), revealing a mild distinction from the 7.3°C (45.1°F) in February. Weather in March »
Weather in April
April is a fresh spring month in Onllwyn, United Kingdom, with temperature in the range of an average low of 5.6°C (42.1°F) and an average high of 12°C (53.6°F). With the arrival of April, Onllwyn's average high-temperature registers at a fresh 12°C (53.6°F), indicating a subtle variation from the previous month. Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Onllwyn, United Kingdom, with an average temperature varying between 14.2°C (57.6°F) and 8°C (46.4°F). The advent of May observes an average high-temperature of a moderate 14.2°C (57.6°F), nearly identical to April's 12°C (53.6°F). Weather in May »
Weather in June
The first month of the summer, June, is a comfortable month in Onllwyn, United Kingdom, with an average temperature fluctuating between 16.6°C (61.9°F) and 10.7°C (51.3°F). Onllwyn records an average high-temperature of an enjoyable 16.6°C (61.9°F) in June, maintaining a close correlation with May's 14.2°C (57.6°F). Weather in June »
Weather in July
July, like June, in Onllwyn, United Kingdom, is another comfortable summer month, with an average temperature varying between 12.7°C (54.9°F) and 18.2°C (64.8°F). Onllwyn's temperatures tend to reach their peak averages in July, with a high of 18.2°C (64.8°F) and a low of 12.7°C (54.9°F). Weather in July »
Weather in August
August, the last month of the summer in Onllwyn, is another refreshing month, with temperature in the range of an average low of 12.9°C (55.2°F) and an average high of 17.9°C (64.2°F). August's arrival registers an average high-temperature of a still refreshing 17.9°C (64.2°F), closely aligning with the temperature of the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is still a refreshing month in Onllwyn, United Kingdom, with temperature in the range of an average high of 16.4°C (61.5°F) and an average low of 11.3°C (52.3°F). As August transitions into September, the average high-temperature rests at a still enjoyable 16.4°C (61.5°F), maintaining a close resemblance to the previous month. Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Onllwyn, United Kingdom, with an average temperature ranging between min 9.5°C (49.1°F) and max 13.5°C (56.3°F). October's arrival brings an average high-temperature of a still refreshing 13.5°C (56.3°F), slightly deviating from September's 16.4°C (61.5°F). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Onllwyn, United Kingdom, with an average temperature fluctuating between 10.3°C (50.5°F) and 6.7°C (44.1°F). With the arrival of November, Onllwyn experiences a modest decline in average high-temperatures, transitioning from a mild 13.5°C (56.3°F) in October to a cool 10.3°C (50.5°F). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Onllwyn, United Kingdom, with an average temperature ranging between min 5.2°C (41.4°F) and max 8.3°C (46.9°F). The commencement of December brings an average high-temperature of a chilly 8.3°C (46.9°F), marking an inconsequential divergence from November. Weather in December »
Updated: Feb 8, 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
What month is the coldest in Onllwyn?
Onllwyn's lowest temperatures tend to occur in January and February, with an average high-temperature of 7.3°C (45.1°F).
What is the most humid month in Onllwyn?
The months with the highest humidity in Onllwyn, United Kingdom, are January and December, with an average relative humidity of 87%.
How many days does it rain in Onllwyn?
In Onllwyn, United Kingdom, during the entire year, the rain falls for 181.3 days and collects up to 568mm (22.36") of precipitation.
When does it snow in Onllwyn?
Months with snowfall in Onllwyn are January through March and December.
What is the snowiest month in Onllwyn?
January is the month with the most snowfall in Onllwyn, United Kingdom. Snow falls for 2 days and accumulates 12mm (0.47") of snow.
How much does it snow in Onllwyn?
In Onllwyn, during the entire year, snow falls for 5.4 days and aggregates up to 28mm (1.1") of snow.
What is the month with the least sunshine in Onllwyn?
January has the least sunshine of the year in Onllwyn, United Kingdom, with an average of 3.7h of sunshine.
What are the months with the lowest UV index in Onllwyn?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Onllwyn, United Kingdom.
What is the least humid month in Onllwyn?
With an average relative humidity of 81%, April is the least humid month.
When it does not snow in Onllwyn?
April through November are months without snowfall.
What is the driest month in Onllwyn?
The month with the least rainfall in Onllwyn is May, when the rain falls for 14.1 days and typically collects 31mm (1.22") of precipitation.
What month has the most sunshine in Onllwyn?
May has the most sunshine of the year in Onllwyn, with an average of 8.1h of sunshine.
What are the months with the highest UV index in Onllwyn?
The months with the highest UV index in Onllwyn, United Kingdom, are May through September, with an average maximum UV index of 4.
When are the longest days in Onllwyn?
June has the longest days of the year in Onllwyn, United Kingdom, with an average of 16h and 36min of daylight.
What time of the year is the hottest in Onllwyn?
July is the month when Onllwyn, United Kingdom, experiences its warmest temperatures, averaging a high of 18.2°C (64.8°F) and a low of 12.7°C (54.9°F).
When is Daylight Saving Time (DST) in Onllwyn?
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time ends in Onllwyn, 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 rainiest month in Onllwyn?
The wettest months in Onllwyn are November and December, with an average 66mm (2.6") of rainfall.
What is the month with the shortest days in Onllwyn?
December has the shortest days of the year, with an average of 7h and 54min of daylight.
Average temperature
Onllwyn, United Kingdom
The warmest month (with the highest average high temperature) is July (18.2°C).
The months with the lowest average high temperature are January and February (7.3°C).
The month with the highest average low temperature is August (12.9°C).
The coldest month (with the lowest average low temperature) is February (3.8°C).
Average pressure
Onllwyn, United Kingdom
- Average pressure in January:
1013.7mbar - Average pressure in February:
1013.2mbar - Average pressure in March:
1015.2mbar - Average pressure in April:
1015.3mbar - Average pressure in May:
1016.7mbar - Average pressure in June:
1015.9mbar
- Average pressure in July:
1015.1mbar - Average pressure in August:
1014.5mbar - Average pressure in September:
1016.7mbar - Average pressure in October:
1014.4mbar - Average pressure in November:
1009.8mbar - Average pressure in December:
1013.7mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.8mbar).
Average wind speed
Onllwyn, United Kingdom
- Average wind speed in January:
21.9km/h - Average wind speed in February:
22.3km/h - Average wind speed in March:
19.6km/h - Average wind speed in April:
16.3km/h - Average wind speed in May:
15.8km/h - Average wind speed in June:
14.9km/h
- Average wind speed in July:
15.1km/h - Average wind speed in August:
16.2km/h - Average wind speed in September:
16.8km/h - Average wind speed in October:
18.9km/h - Average wind speed in November:
21.2km/h - Average wind speed in December:
22.4km/h
The windiest month (with the highest average wind speed) is December (22.4km/h).
The calmest month (with the lowest average wind speed) is June (14.9km/h).
Average humidity
Onllwyn, United Kingdom
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is April (81%).
Average rainfall
Onllwyn, United Kingdom
The wettest months (with the highest rainfall) are November and December (66mm).
The driest month (with the least rainfall) is May (31mm).
Average rainfall days
Onllwyn, United Kingdom
- Average rainfall days in January:
16.1 days - Average rainfall days in February:
13.3 days - Average rainfall days in March:
13.7 days - Average rainfall days in April:
13.6 days - Average rainfall days in May:
14.1 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
16 days - Average rainfall days in September:
12.6 days - Average rainfall days in October:
15.5 days - Average rainfall days in November:
17 days - Average rainfall days in December:
16.9 days
The month with the highest number of rainy days is November (17 days).
The month with the least rainy days is September (12.6 days).
Average snowfall
Onllwyn, United Kingdom
The month with the highest snowfall is January (12mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days
Onllwyn, United Kingdom
- Average snowfall days in January:
2 days - Average snowfall days in February:
1.7 days - Average snowfall days in March:
0.3 days - Average snowfall days in April:
0.1 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:
0.2 days - Average snowfall days in December:
1.1 days
The month with the highest number of snowfall days is January (2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Onllwyn, United Kingdom
- Average daylight in January:
8h and 2min - Average daylight in February:
10h and 0min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 5min - Average daylight in May:
15h and 4min - Average daylight in June:
16h and 4min
- Average daylight in July:
16h and 1min - Average daylight in August:
14h and 4min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 4min - Average daylight in November:
8h and 5min - Average daylight in December:
7h and 5min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
5h and 5min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 1min - Average sunshine in June:
7h and 4min
- Average sunshine in July:
7h and 5min - Average sunshine in August:
7h and 2min - Average sunshine in September:
6h and 5min - Average sunshine in October:
4h and 2min - Average sunshine in November:
3h and 5min - Average sunshine in December:
3h and 5min
The month with the most sunshine is May (Average sunshine: 8h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Onllwyn, United Kingdom
- Average sunshine days in January:
10.5 days - Average sunshine days in February:
11.7 days - Average sunshine days in March:
14.1 days - Average sunshine days in April:
13.6 days - Average sunshine days in May:
14 days - Average sunshine days in June:
11 days
- Average sunshine days in July:
10.3 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
14.4 days - Average sunshine days in October:
12.9 days - Average sunshine days in November:
10.7 days - Average sunshine days in December:
11.1 days
The month with the most sunshine days is September (14.4 days).
The month with the least sunshine days is July (10.3 days).
Average UV index
Onllwyn, United Kingdom
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
Onllwyn, United Kingdom
The month with the most cloud cover is December (Cloud cover 63).
The months with the least cloud cover are April and May (Cloud cover 47).
Average visibility
Onllwyn, United Kingdom
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
