Climate and monthly weather forecastTrefriw, United Kingdom
Climate and monthly weather forecast
Weather in January
January, like December, is a frosty winter month in Trefriw, United Kingdom, with temperature in the range of an average low of 3.8°C (38.8°F) and an average high of 6.8°C (44.2°F). January is the coldest month, exhibiting average temperatures of 6.8°C (44.2°F) at the peak and 3.8°C (38.8°F) at the base. Weather in January »Weather in February
February, the last month of the winter in Trefriw, is also a frosty month, with an average temperature fluctuating between 3.9°C (39°F) and 7.1°C (44.8°F). Trefriw measures an average high-temperature of a still chilly 7.1°C (44.8°F) in February, nearly consistent with the preceding month. Weather in February »Weather in March
The first month of the spring, March, is still a chilly month in Trefriw, United Kingdom, with an average temperature fluctuating between 4.3°C (39.7°F) and 8.3°C (46.9°F). As Trefriw welcomes March, the average high-temperature stabilizes at a still chilly 8.3°C (46.9°F), showing little deviation from February's 7.1°C (44.8°F). Weather in March »Weather in April
April in Trefriw, United Kingdom, is a cool spring month, with an average temperature fluctuating between 5.9°C (42.6°F) and 10.5°C (50.9°F). The advent of April denotes an average high-temperature of a fresh 10.5°C (50.9°F), subtly different from March's 8.3°C (46.9°F). Weather in April »Weather in May
The last month of the spring, May, is also a fresh month in Trefriw, United Kingdom, with an average temperature varying between 12.9°C (55.2°F) and 8.1°C (46.6°F). May's arrival brings an average high-temperature of a still cool 12.9°C (55.2°F), slightly deviating from April's 10.5°C (50.9°F). Weather in May »Weather in June
June, the first month of the summer in Trefriw, is a moderate month, with an average temperature fluctuating between 10.6°C (51.1°F) and 15.4°C (59.7°F). The commencement of June introduces an average high-temperature of a refreshing 15.4°C (59.7°F), closely mirroring the preceding month. Weather in June »Weather in July
July in Trefriw, United Kingdom, is an enjoyable summer month, with temperature in the range of an average high of 16.9°C (62.4°F) and an average low of 12.3°C (54.1°F). The month of July sees the highest average temperatures, reaching 16.9°C (62.4°F) at the peak and 12.3°C (54.1°F) at the low. Weather in July »Weather in August
August, the last month of the summer in Trefriw, is another refreshing month, with an average temperature varying between 12.8°C (55°F) and 16.8°C (62.2°F). As Trefriw transitions from July to August, the average high-temperatures adjust to a still refreshing 16.8°C (62.2°F), nearly the same as the previous 16.9°C (62.4°F). Weather in August »Weather in September
The first month of the autumn, September, is also a moderate month in Trefriw, United Kingdom, with an average temperature varying between 15.3°C (59.5°F) and 11.5°C (52.7°F). September's onset records a minor alteration in the average high-temperature to a still refreshing 15.3°C (59.5°F) from August's 16.8°C (62.2°F). Weather in September »Weather in October
October, the same as September, in Trefriw, United Kingdom, is a moderate autumn month, with temperature in the range of an average high of 13.1°C (55.6°F) and an average low of 9.7°C (49.5°F). October's beginning signals an average high-temperature of a still refreshing 13.1°C (55.6°F), barely different from September's 15.3°C (59.5°F). Weather in October »Weather in November
November, the last month of the autumn in Trefriw, is another chilly month, with an average temperature ranging between min 6.9°C (44.4°F) and max 9.8°C (49.6°F). The start of November comes with a small reduction in the average high-temperature, subtly receding from a mild 13.1°C (55.6°F) in October to a frosty 9.8°C (49.6°F). Weather in November »Weather in December
The first month of the winter, December, is also a frosty month in Trefriw, United Kingdom, with an average temperature fluctuating between 8°C (46.4°F) and 5.3°C (41.5°F). The introduction of December notes a subtle temperature variation to a still frosty 8°C (46.4°F) from November's 9.8°C (49.6°F). 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
In Trefriw, January is the coldest month, with temperatures averaging a high of 6.8°C (44.2°F) and a low of 3.8°C (38.8°F).
The months with the highest humidity are January and August, with an average relative humidity of 85%.
Throughout the year, there are 228.5 rainfall days, and 604mm (23.78") of precipitation is accumulated.
January through April, November and December are months with snowfall.
Throughout the year, in Trefriw, there are 9 snowfall days, and 69mm (2.72") of snow is accumulated.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Trefriw.
The month with the most snowfall is February, when snow falls for 3.3 days and typically aggregates up to 21mm (0.83") of snow.
The months with the lowest humidity are April and May, with an average relative humidity of 81%.
May is the month with the least rainfall. Rain falls for 16.9 days and accumulates 31mm (1.22") of precipitation.
In Trefriw, United Kingdom, snow does not fall in May through October.
May and June, with an average of 7.7h of sunshine, are months with the most sunshine.
The months with the highest UV index in Trefriw are May through September, with an average maximum UV index of 4.
The month with the longest days is June, with an average of 16h and 54min of daylight.
July is the warmest month in Trefriw, United Kingdom, with an average high-temperature of 16.9°C (62.4°F) and an average low-temperature of 12.3°C (54.1°F).
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time ends in Trefriw, United Kingdom, 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.
November is the month with the most rainfall. Rain falls for 22.4 days and accumulates 68mm (2.68") of precipitation.
With an average of 3.6h of sunshine, November has the least sunshine of the year.
December has the shortest days of the year, with an average of 7h and 36min of daylight.
Average temperature
Trefriw, United Kingdom
The warmest month (with the highest average high temperature) is July (16.9°C).
The month with the lowest average high temperature is January (6.8°C).
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (3.8°C).
Average pressure
Trefriw, United Kingdom
- Average pressure in January:
1012.2mbar - Average pressure in February:
1011.8mbar - Average pressure in March:
1014.4mbar - Average pressure in April:
1015.1mbar - Average pressure in May:
1016.2mbar - Average pressure in June:
1015.3mbar
- Average pressure in July:
1014.1mbar - Average pressure in August:
1013.2mbar - Average pressure in September:
1015.6mbar - Average pressure in October:
1013.5mbar - Average pressure in November:
1008.8mbar - Average pressure in December:
1011.8mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1008.8mbar).
Average wind speed
Trefriw, United Kingdom
- Average wind speed in January:
22.8km/h - Average wind speed in February:
22.1km/h - Average wind speed in March:
19.4km/h - Average wind speed in April:
16.1km/h - Average wind speed in May:
16.3km/h - Average wind speed in June:
14.4km/h
- Average wind speed in July:
14.7km/h - Average wind speed in August:
16.7km/h - Average wind speed in September:
17.9km/h - Average wind speed in October:
19.7km/h - Average wind speed in November:
22.1km/h - Average wind speed in December:
23.8km/h
The windiest month (with the highest average wind speed) is December (23.8km/h).
The calmest month (with the lowest average wind speed) is June (14.4km/h).
Average humidity
Trefriw, United Kingdom
The months with the highest relative humidity are January and August (85%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall
Trefriw, United Kingdom
The wettest month (with the highest rainfall) is November (68mm).
The driest month (with the least rainfall) is May (31mm).
Average rainfall days
Trefriw, United Kingdom
- Average rainfall days in January:
20.5 days - Average rainfall days in February:
15.8 days - Average rainfall days in March:
17.1 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
16.9 days - Average rainfall days in June:
16.7 days
- Average rainfall days in July:
20.8 days - Average rainfall days in August:
21.6 days - Average rainfall days in September:
17.9 days - Average rainfall days in October:
19.5 days - Average rainfall days in November:
22.4 days - Average rainfall days in December:
22.5 days
The month with the highest number of rainy days is December (22.5 days).
The month with the least rainy days is February (15.8 days).
Average snowfall
Trefriw, United Kingdom
The month with the highest snowfall is February (21mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days
Trefriw, United Kingdom
- Average snowfall days in January:
2.3 days - Average snowfall days in February:
3.3 days - Average snowfall days in March:
0.8 days - Average snowfall days in April:
0.2 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:
0.5 days - Average snowfall days in December:
1.9 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Trefriw, United Kingdom
- Average daylight in January:
8h and 12min - Average daylight in February:
9h and 54min - Average daylight in March:
11h and 54min - Average daylight in April:
14h and 0min - Average daylight in May:
15h and 54min - Average daylight in June:
16h and 54min
- Average daylight in July:
16h and 24min - Average daylight in August:
14h and 42min - Average daylight in September:
12h and 42min - Average daylight in October:
10h and 36min - Average daylight in November:
8h and 42min - Average daylight in December:
7h and 36min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in January:
3h and 48min - Average sunshine in February:
3h and 48min - Average sunshine in March:
5h and 42min - Average sunshine in April:
7h and 36min - Average sunshine in May:
7h and 42min - Average sunshine in June:
7h and 42min
- Average sunshine in July:
7h and 24min - Average sunshine in August:
7h and 18min - Average sunshine in September:
6h and 30min - Average sunshine in October:
4h and 12min - Average sunshine in November:
3h and 36min - Average sunshine in December:
3h and 42min
The months with the most sunshine are May and June (Average sunshine: 7h and 42min).
The month with the least sunshine is November (Average sunshine: 3h and 36min).
Average sunshine days
Trefriw, United Kingdom
- Average sunshine days in January:
6.7 days - Average sunshine days in February:
7.8 days - Average sunshine days in March:
11 days - Average sunshine days in April:
10.4 days - Average sunshine days in May:
11 days - Average sunshine days in June:
10.1 days
- Average sunshine days in July:
8.1 days - Average sunshine days in August:
6.3 days - Average sunshine days in September:
8.5 days - Average sunshine days in October:
7.1 days - Average sunshine days in November:
5.2 days - Average sunshine days in December:
5.4 days
The months with the most sunshine days are March and May (11 days).
The month with the least sunshine days is November (5.2 days).
Average UV index
Trefriw, 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
Trefriw, United Kingdom
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is May (Cloud cover 49).
Average visibility
Trefriw, United Kingdom
The months with the highest visibility are March, September and October (10km).
The months with the lowest visibility are January, February, April, May, June, July, August, November and December (9km).
