Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
November's transformation into December witnesses an average high-temperature of a still chilly 6.5°C (43.7°F), noting a minor change from the preceding month. Merthyr Cynog experiences a steady nighttime temperature of 2.4°C (36.3°F) throughout the month of December.Humidity
January, November and December, with an average relative humidity of 92%, are the most humid months.Rainfall
In December, in Merthyr Cynog, United Kingdom, the rain falls for 12.2 days. Throughout December, 28mm (1.1") of precipitation is accumulated. In Merthyr Cynog, during the entire year, the rain falls for 147.5 days and collects up to 288mm (11.34") of precipitation.Snowfall
Months with snowfall in Merthyr Cynog, United Kingdom, are January through April, November and December. In Merthyr Cynog, in December, during 2.1 snowfall days, 14mm (0.55") of snow is typically accumulated. Throughout the year, in Merthyr Cynog, there are 15.7 snowfall days, and 84mm (3.31") of snow is accumulated.Daylight
The month with the shortest days in Merthyr Cynog is December, with an average of 7h and 48min of daylight.On the first day of the month, sunrise is at 8:00 am and sunset at 4:05 pm. On the last day of December, in Merthyr Cynog, sunrise is at 8:22 am and sunset at 4:12 pm GMT.
Sunshine
The average sunshine in December is 3.1h.UV index
January through March, 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 minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Around midday, solar radiation is most harmful; hence, exposure should be limited. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Merthyr Cynog?
What are the most humid months in Merthyr Cynog?
What is the average humidity in December in Merthyr Cynog?
How many days does it rain in December in Merthyr Cynog?
How many days does it snow in December in Merthyr Cynog?
What is the month with the shortest days in Merthyr Cynog?
How many hours of daylight does Merthyr Cynog have in December?
What time are sunrise and sunset in December in Merthyr Cynog?
How long on average sun shines in December in Merthyr Cynog?
When is the lowest UV index in Merthyr Cynog?
How high is the UV index in December in Merthyr Cynog?
Average temperature in December
Merthyr Cynog, United Kingdom
- Average high temperature in December: 6.5°C
The warmest month (with the highest average high temperature) is July (17.6°C).
The month with the lowest average high temperature is January (5.5°C).
- Average low temperature in December: 2.4°C
The month with the highest average low temperature is August (10.3°C).
The coldest month (with the lowest average low temperature) is January (1.1°C).
Average pressure in December
Merthyr Cynog, United Kingdom
- Average pressure in December: 1013.3mbar
The month with the highest atmospheric pressure is May (1016.5mbar).
The month with the lowest atmospheric pressure is November (1009.6mbar).
Average wind speed in December
Merthyr Cynog, United Kingdom
- Average wind speed in December: 18.5km/h
The windiest month (with the highest average wind speed) is February (19km/h).
The calmest months (with the lowest average wind speed) are June and July (12.9km/h).
Average humidity in December
Merthyr Cynog, United Kingdom
- Average humidity in December: 92%
The months with the highest relative humidity are January, November and December (92%).
The months with the lowest relative humidity are April and May (85%).
Average rainfall in December
Merthyr Cynog, United Kingdom
- Average rainfall in December: 28mm
The wettest month (with the highest rainfall) is June (37mm).
The driest month (with the least rainfall) is September (13mm).
Average rainfall days in December
Merthyr Cynog, United Kingdom
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is July (15.4 days).
The months with the least rainy days are February and September (9.4 days).
Average snowfall in December
Merthyr Cynog, United Kingdom
- Average snowfall in December: 14mm
The month with the highest snowfall is November (21mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Merthyr Cynog, United Kingdom
- Average snowfall days in December: 2.1 days
The month with the highest number of snowfall days is February (4.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Merthyr Cynog, United Kingdom
- Average daylight in December: 7h and 5min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is May (Average sunshine: 6h and 18min).
The month with the least sunshine is November (Average sunshine: 2h and 54min).
Average sunshine days in December
Merthyr Cynog, United Kingdom
- Average sunshine days in December: 15.7 days
The months with the most sunshine days are March and September (16.2 days).
The month with the least sunshine days is July (10.1 days).
Average UV index in December
Merthyr Cynog, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Merthyr Cynog, United Kingdom
- Average cloud cover in December: 71
The month with the most cloud cover is November (Cloud cover 73).
The month with the least cloud cover is April (Cloud cover 59).
Average visibility in December
Merthyr Cynog, United Kingdom
- Average visibility in December: 8km
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (8km).
The months with the lowest visibility are August and September (7km).
