Climate and monthly weather forecastLlanishen, United Kingdom
Climate and monthly weather forecast
Weather in January
January, like December, is a frosty winter month in Llanishen, United Kingdom, with an average temperature varying between 4.1°C (39.4°F) and 7.5°C (45.5°F). The coldest period tends to be January, when average temperatures fluctuate between a high of 7.5°C (45.5°F) and a low of 4.1°C (39.4°F). Weather in January »Weather in February
The last month of the winter, February, is another chilly month in Llanishen, United Kingdom, with an average temperature ranging between min 3.9°C (39°F) and max 7.8°C (46°F). During February, Llanishen observes a subtle ascent to a still frosty 7.8°C (46°F) from January's 7.5°C (45.5°F) in the average high-temperature. Weather in February »Weather in March
March, the first month of the spring in Llanishen, is still a chilly month, with temperature in the range of an average high of 9.8°C (49.6°F) and an average low of 4.4°C (39.9°F). The shift into March finds Llanishen at an average high-temperature of a still frosty 9.8°C (49.6°F), closely comparable to February's conditions. Weather in March »Weather in April
April is a cool spring month in Llanishen, United Kingdom, with temperature in the range of an average high of 12.3°C (54.1°F) and an average low of 5.9°C (42.6°F). April's onset records a minor alteration in the average high-temperature to a fresh 12.3°C (54.1°F) from March's 9.8°C (49.6°F). Weather in April »Weather in May
May, the last month of the spring in Llanishen, is a mild month, with an average temperature fluctuating between 14.7°C (58.5°F) and 8.3°C (46.9°F). On the advent of May, Llanishen's average high-temperature exhibits a minor adjustment to a refreshing 14.7°C (58.5°F) from April's 12.3°C (54.1°F). Weather in May »Weather in June
The first month of the summer, June, is an enjoyable month in Llanishen, United Kingdom, with an average temperature ranging between min 10.9°C (51.6°F) and max 17.3°C (63.1°F). June registers an average high-temperature of a comfortable 17.3°C (63.1°F), slightly varied from May's 14.7°C (58.5°F). Weather in June »Weather in July
July, like June, in Llanishen, United Kingdom, is another refreshing summer month, with an average temperature fluctuating between 19°C (66.2°F) and 13°C (55.4°F). The warmest month is July, with an average high-temperature of 19°C (66.2°F) and an average low-temperature of 13°C (55.4°F). Weather in July »Weather in August
August, the last month of the summer in Llanishen, is also an enjoyable month, with temperature in the range of an average high of 18.5°C (65.3°F) and an average low of 13.3°C (55.9°F). As July transitions into August, Llanishen records an average high-temperature of a still enjoyable 18.5°C (65.3°F), showing a gentle shift from the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is also an enjoyable month in Llanishen, United Kingdom, with an average temperature fluctuating between 17.1°C (62.8°F) and 11.4°C (52.5°F). The shift into September uncovers an average high-temperature of a still enjoyable 17.1°C (62.8°F), subtly different from the previous month. Weather in September »Weather in October
October, the same as September, in Llanishen, United Kingdom, is another mild autumn month, with temperature in the range of an average high of 14.1°C (57.4°F) and an average low of 9.7°C (49.5°F). October witnesses a gentle descent in average high-temperature, descending from September's comfortable 17.1°C (62.8°F) to a moderate 14.1°C (57.4°F). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Llanishen, United Kingdom, with an average temperature varying between 6.9°C (44.4°F) and 10.4°C (50.7°F). A subtle change in temperatures is noted as October gives way to November, with average highs reducing from a mild 14.1°C (57.4°F) to a cool 10.4°C (50.7°F). Weather in November »Weather in December
The first month of the winter, December, is also a frosty month in Llanishen, United Kingdom, with temperature in the range of an average low of 5.2°C (41.4°F) and an average high of 8.6°C (47.5°F). The shift into December reveals an average high-temperature of a frosty 8.6°C (47.5°F), closely mirroring November's climate. Weather in December »Updated: Feb 9, 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
The month of January sees the average lowest temperatures, reaching 7.5°C (45.5°F) at the peak and 4.1°C (39.4°F) at the low.
In Llanishen, during the entire year, the rain falls for 132.6 days and collects up to 252mm (9.92") of precipitation.
Months with snowfall are January, February, November and December.
Throughout the year, there are 3.1 snowfall days, and 8mm (0.31") of snow is accumulated.
The months with the lowest UV index in Llanishen are January through March, November and December, with an average maximum UV index of 2.
The month with the most snowfall in Llanishen is February, when snow falls for 1 days and typically aggregates up to 5mm (0.2") of snow.
March through October are months without snowfall.
The months with the lowest humidity are April and May, with an average relative humidity of 81%.
The month with the least rainfall in Llanishen, United Kingdom, is April, when the rain falls for 9.1 days and typically collects 12mm (0.47") of precipitation.
With an average of 8.2h of sunshine, May has the most sunshine of the year in Llanishen.
May through September, with an average maximum UV index of 4, are months with the highest UV index.
June has the longest days of the year in Llanishen, United Kingdom, with an average of 16h and 36min of daylight.
Llanishen, United Kingdom, reaches its average highest temperatures in July, measuring 19°C (66.2°F) at the peak and 13°C (55.4°F) at the lowest.
The wettest months in Llanishen, United Kingdom, are August and November, with an average 31mm (1.22") of rainfall.
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.
The months with the highest humidity are November and December, with an average relative humidity of 86%.
November has the least sunshine of the year in Llanishen, with an average of 3.9h of sunshine.
December has the shortest days of the year, with an average of 7h and 54min of daylight.
Average temperature
Llanishen, United Kingdom
The warmest month (with the highest average high temperature) is July (19°C).
The month with the lowest average high temperature is January (7.5°C).
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is February (3.9°C).
Average pressure
Llanishen, United Kingdom
- Average pressure in January:
1014mbar - Average pressure in February:
1013.4mbar - Average pressure in March:
1015.3mbar - Average pressure in April:
1015.4mbar - Average pressure in May:
1016.7mbar - Average pressure in June:
1016mbar
- Average pressure in July:
1015.2mbar - Average pressure in August:
1014.7mbar - Average pressure in September:
1016.8mbar - Average pressure in October:
1014.6mbar - Average pressure in November:
1010mbar - Average pressure in December:
1014mbar
The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010mbar).
Average wind speed
Llanishen, United Kingdom
- Average wind speed in January:
21.6km/h - Average wind speed in February:
22.3km/h - Average wind speed in March:
19.9km/h - Average wind speed in April:
16.2km/h - Average wind speed in May:
15.9km/h - Average wind speed in June:
15.2km/h
- Average wind speed in July:
15.2km/h - Average wind speed in August:
16km/h - Average wind speed in September:
16.3km/h - Average wind speed in October:
18.6km/h - Average wind speed in November:
21km/h - Average wind speed in December:
22km/h
The windiest month (with the highest average wind speed) is February (22.3km/h).
The calmest months (with the lowest average wind speed) are June and July (15.2km/h).
Average humidity
Llanishen, United Kingdom
The months with the highest relative humidity are November and December (86%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall
Llanishen, United Kingdom
The wettest months (with the highest rainfall) are August and November (31mm).
The driest month (with the least rainfall) is April (12mm).
Average rainfall days
Llanishen, United Kingdom
- Average rainfall days in January:
11.3 days - Average rainfall days in February:
9.1 days - Average rainfall days in March:
9.9 days - Average rainfall days in April:
9.1 days - Average rainfall days in May:
10.3 days - Average rainfall days in June:
10.7 days
- Average rainfall days in July:
12.1 days - Average rainfall days in August:
13.2 days - Average rainfall days in September:
10 days - Average rainfall days in October:
10.9 days - Average rainfall days in November:
13.5 days - Average rainfall days in December:
12.5 days
The month with the highest number of rainy days is November (13.5 days).
The months with the least rainy days are February and April (9.1 days).
Average snowfall
Llanishen, United Kingdom
The month with the highest snowfall is February (5mm).
The months with the least snowfall are March, April, May, June, July, August, September and October (0mm).
Average snowfall days
Llanishen, United Kingdom
- Average snowfall days in January:
0.8 days - Average snowfall days in February:
1 days - Average snowfall days in March:
0.3 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:
0.3 days - Average snowfall days in December:
0.7 days
The month with the highest number of snowfall days is February (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Llanishen, United Kingdom
- Average daylight in January:
8h and 24min - Average daylight in February:
10h and 0min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 54min - Average daylight in May:
15h and 36min - Average daylight in June:
16h and 36min
- Average daylight in July:
16h and 6min - Average daylight in August:
14h and 36min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 42min - Average daylight in November:
8h and 54min - Average daylight in December:
7h and 54min
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:
4h and 6min - Average sunshine in February:
4h and 6min - Average sunshine in March:
5h and 54min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 12min - Average sunshine in June:
7h and 48min
- Average sunshine in July:
8h and 6min - Average sunshine in August:
7h and 36min - Average sunshine in September:
7h and 12min - Average sunshine in October:
4h and 30min - Average sunshine in November:
3h and 54min - Average sunshine in December:
4h and 6min
The month with the most sunshine is May (Average sunshine: 8h and 12min).
The month with the least sunshine is November (Average sunshine: 3h and 54min).
Average sunshine days
Llanishen, United Kingdom
- Average sunshine days in January:
15.4 days - Average sunshine days in February:
15.2 days - Average sunshine days in March:
18.8 days - Average sunshine days in April:
19.2 days - Average sunshine days in May:
18.4 days - Average sunshine days in June:
16.3 days
- Average sunshine days in July:
15.4 days - Average sunshine days in August:
14.2 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
16 days - Average sunshine days in November:
13.7 days - Average sunshine days in December:
14.5 days
The month with the most sunshine days is April (19.2 days).
The month with the least sunshine days is November (13.7 days).
Average UV index
Llanishen, 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, March, November and December (UV index 2).
Average cloud cover
Llanishen, United Kingdom
The month with the most cloud cover is November (Cloud cover 61).
The months with the least cloud cover are April and May (Cloud cover 46).
Average visibility
Llanishen, United Kingdom
The months with the highest visibility are February, March and December (10km).
The months with the lowest visibility are January, April, May, June, July, August, September, October and November (9km).
