Valley climate
Valley (Wales, United Kingdom) has a temperate oceanic climate (Köppen Cfb). The average temperature over the year is 11 °C52 °F, and about 1,123 mm44 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Valley climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 847 | 643 | 745 | 1094.3 |
| Feb | 846 | 542 | 744 | 893.5 |
| Mar | 847 | 642 | 745 | 813.2 |
| Apr | 1050 | 745 | 948 | 632.5 |
| May | 1355 | 1049 | 1152 | 652.5 |
| Jun | 1559 | 1254 | 1456 | 722.8 |
| Jul | 1662 | 1457 | 1559 | 793.1 |
| Aug | 1762 | 1458 | 1660 | 943.7 |
| Sep | 1661 | 1356 | 1558 | 923.6 |
| Oct | 1457 | 1153 | 1355 | 1224.8 |
| Nov | 1152 | 948 | 1050 | 1275.0 |
| Dec | 948 | 745 | 847 | 1315.1 |
| Year | 1762 | 542 | 1152 | 1,12344 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 85% | 81% | 0.6 | 8:02 |
| Feb | 86% | 79% | 1.4 | 9:44 |
| Mar | 86% | 76% | 2.6 | 11:41 |
| Apr | 84% | 75% | 4.1 | 13:54 |
| May | 84% | 73% | 5.2 | 15:50 |
| Jun | 85% | 75% | 5.5 | 16:57 |
| Jul | 86% | 78% | 5.0 | 16:29 |
| Aug | 85% | 79% | 4.2 | 14:46 |
| Sep | 84% | 78% | 3.0 | 12:35 |
| Oct | 84% | 81% | 1.7 | 10:27 |
| Nov | 84% | 84% | 0.8 | 8:31 |
| Dec | 85% | 83% | 0.5 | 7:32 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Valley is like
The warmest month is August, with an average high of 17 °C62 °F and a low of 14 °C58 °F. The coldest is February, when highs average 8 °C46 °F and lows 5 °C42 °F. There is a clear seasonal cycle, with 9.1 °C16.3 °F between the average temperature of the warmest and the coolest month.
It is wet, with about 1,123 mm44 in of precipitation per year. The wettest three-month stretch is October–December, which brings 34% of the annual total. The wettest month is December (131 mm5.1 in), the driest is April (63 mm2.5 in).
Relative humidity ranges from 84% in October to 86% in February. The clearest skies (lowest average cloud amount, 73%) are typical of May. Average wind speed near the ground ranges from 17 km/h (10 mph) in June to 27 km/h (17 mph) in January. Daylight lasts from about 7.5 hours in December to 17.0 hours in June.
Best time to visit Valley
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–September: average highs of 15 °C59 °F to 17 °C62 °F with 72 mm2.8 in to 94 mm3.7 in of precipitation per month.
The most challenging month is December, which is cold, with average highs of 9 °C48 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Valley
- Winter (December–February) — highs 846 to 9 °C48 °F, lows 542 to 7 °C45 °F, about 110 mm4.3 in of precipitation a month. Pack a warm coat, layers and closed shoes and an umbrella or light rain jacket.
- Spring (March–May) — highs 847 to 13 °C55 °F, lows 642 to 10 °C49 °F, about 69 mm2.7 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Summer (June–August) — highs 1559 to 17 °C62 °F, lows 1254 to 14 °C58 °F, about 82 mm3.2 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Autumn (September–November) — highs 1152 to 16 °C61 °F, lows 948 to 13 °C56 °F, about 114 mm4.5 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an umbrella or light rain jacket.
How Valley compares
Compared with Isle of Man (Douglas), about 96 km to the north, Valley has practically the same average temperature and receives a similar amount of precipitation. The difference is largest in June (0.6 °C1.1 °F warmer).
Of the 66 places in the United Kingdom covered by World Climates, Valley is the 15th warmest by annual mean temperature and the 7th wettest by annual precipitation. See all of them on the United Kingdom climate page.
Places in other countries with the most similar temperature and rainfall pattern: Cork (Ireland, Cfb), Dublin (Ireland, Cfb) and Limerick (Ireland, Cfb).
Nearby places
- Isle of Man (Douglas) 96 km · 11 °C51 °F · 1,124 mm44 in
- Birkenhead 104 km · 10 °C50 °F · 980 mm39 in
- Liverpool 106 km · 10 °C50 °F · 980 mm39 in
- Dublin 112 km · 10 °C50 °F · 983 mm39 in
- Blackpool 116 km · 10 °C50 °F · 1,164 mm46 in
- Preston 134 km · 10 °C49 °F · 1,147 mm45 in
- Manchester 156 km · 10 °C49 °F · 1,002 mm39 in
- Telford 157 km · 9 °C48 °F · 806 mm32 in
Frequently asked questions
What is the warmest month in Valley?
August is the warmest month in Valley, with an average high of 17 °C (62 °F) and an average low of 14 °C (58 °F).
What is the coldest month in Valley?
February is the coldest month, with an average high of 8 °C (46 °F) and an average low of 5 °C (42 °F).
When does it rain the most in Valley?
December is the wettest month with about 131 mm (5.1 in) of precipitation; April is the driest with about 63 mm (2.5 in).
What is the best time to visit Valley?
Judging by long-term averages, the most comfortable months are June–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.