Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
January
Weather in January
Temperature
With average high and low temperatures of 7.5°C (45.5°F) and 4.1°C (39.4°F) respectively, January is Merthyr Mawr's coldest month.Humidity
In January, the average relative humidity in Merthyr Mawr is 85%.Rainfall
In Merthyr Mawr, United Kingdom, during January, the rain falls for 16.8 days and regularly aggregates up to 60mm (2.36") of precipitation. In Merthyr Mawr, during the entire year, the rain falls for 197.2 days and collects up to 669mm (26.34") of precipitation.Snowfall
January through March and December are months with snowfall. In January, in Merthyr Mawr, it is snowing for 0.9 days. Throughout January, 4mm (0.16") of snow is accumulated. In Merthyr Mawr, during the entire year, snow falls for 3.6 days and aggregates up to 21mm (0.83") of snow.Daylight
In January, the average length of the day is 8h and 27min.On the first day of January in Merthyr Mawr, sunrise is at 8:19 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:54 am and sunset at 5:01 pm GMT.
Sunshine
January has the least sunshine of the year, with an average of 3.6h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 2 during January translates into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Merthyr Mawr?
What is the usual temperature for Merthyr Mawr in January?
What is the average humidity in January in Merthyr Mawr?
How many days does it rain in January in Merthyr Mawr?
How many days does it snow in January in Merthyr Mawr?
What is the average length of the day in January in Merthyr Mawr?
When is the sunrise / sunset in January in Merthyr Mawr?
What is the month with the least sunshine in Merthyr Mawr?
How long on average sun shines in January in Merthyr Mawr?
What is the month with the lowest UV index in Merthyr Mawr?
How high is the UV index in January in Merthyr Mawr?
Average temperature in January
Merthyr Mawr, United Kingdom
- Average high temperature in January: 7.5°C
The warmest month (with the highest average high temperature) is July (18.8°C).
The month with the lowest average high temperature is January (7.5°C).
- Average low temperature in January: 4.1°C
The month with the highest average low temperature is August (13.2°C).
The coldest month (with the lowest average low temperature) is February (4°C).
Average pressure in January
Merthyr Mawr, United Kingdom
- Average pressure in January: 1013.9mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.9mbar).
Average wind speed in January
Merthyr Mawr, United Kingdom
- Average wind speed in January: 22.5km/h
The windiest month (with the highest average wind speed) is December (23.1km/h).
The calmest month (with the lowest average wind speed) is June (15.5km/h).
Average humidity in January
Merthyr Mawr, United Kingdom
- Average humidity in January: 85%
The month with the highest relative humidity is December (86%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in January
Merthyr Mawr, United Kingdom
- Average rainfall in January: 60mm
The wettest month (with the highest rainfall) is November (79mm).
The driest month (with the least rainfall) is April (32mm).
Average rainfall days in January
Merthyr Mawr, United Kingdom
- Average rainfall days in January: 16.8 days
The month with the highest number of rainy days is November (19.1 days).
The month with the least rainy days is February (13.9 days).
Average snowfall in January
Merthyr Mawr, United Kingdom
- Average snowfall in January: 4mm
The month with the highest snowfall is December (9mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in January
Merthyr Mawr, United Kingdom
- Average snowfall days in January: 0.9 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Merthyr Mawr, United Kingdom
- Average daylight in January: 8h and 3min
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
The month with the most sunshine is May (Average sunshine: 8h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in January
Merthyr Mawr, United Kingdom
- Average sunshine days in January: 11.3 days
The month with the most sunshine days is May (13.5 days).
The month with the least sunshine days is November (9 days).
Average UV index in January
Merthyr Mawr, United Kingdom
- Average UV index in January: 2
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 in January
Merthyr Mawr, United Kingdom
- Average cloud cover in January: 62
The month with the most cloud cover is November (Cloud cover 64).
The month with the least cloud cover is April (Cloud cover 48).
Average visibility in January
Merthyr Mawr, United Kingdom
- Average visibility in January: 9km
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).
