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
Johnstown Bridge sees the arrival of December with an average high-temperature of a still frosty 7.1°C (44.8°F), indicating a subtle variation from November. Johnstown Bridge's December nights experience a subtle temperature dip to an average of 2.8°C (37°F).Humidity
With an average relative humidity of 91%, December is the most humid month.Rainfall
In Johnstown Bridge, in December, it is raining for 11.8 days, with typically 19mm (0.75") of accumulated precipitation. Throughout the year, there are 170.7 rainfall days, and 271mm (10.67") of precipitation is accumulated.Snowfall
Months with snowfall in Johnstown Bridge are January through March and December. December is the first month it typically snows. Throughout December, in the average 0.8 snowfall days, it receives 4mm (0.16") of snow. Throughout the year, there are 6.1 snowfall days, and 33mm (1.3") of snow is accumulated.Daylight
The month with the shortest days in Johnstown Bridge is December, with an average of 7h and 36min of daylight.On the first day of the month, sunrise is at 8:20 am and sunset at 4:12 pm. On the last day of December, sunrise is at 8:42 am and sunset at 4:18 pm GMT.
Sunshine
In December, the average sunshine is 4.2h.UV index
The months with the lowest UV index in Johnstown Bridge are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 2 during December leads to these advisories:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Johnstown Bridge in December?
What is the most humid month in Johnstown Bridge?
What is the average humidity in December in Johnstown Bridge?
How many days does it rain in December in Johnstown Bridge?
When does it start snowing in Johnstown Bridge?
What is the month with the shortest days in Johnstown Bridge?
How many hours of daylight does Johnstown Bridge have in December?
What time are sunrise and sunset in December in Johnstown Bridge?
How long on average sun shines in December in Johnstown Bridge?
When is the lowest UV index in Johnstown Bridge?
How high is the UV index in December in Johnstown Bridge?
Average temperature in December
Johnstown Bridge, Ireland
- Average high temperature in December: 7.1°C
The warmest month (with the highest average high temperature) is July (17.7°C).
The month with the lowest average high temperature is January (6.9°C).
- Average low temperature in December: 2.8°C
The month with the highest average low temperature is July (10.8°C).
The coldest month (with the lowest average low temperature) is January (2.2°C).
Average pressure in December
Johnstown Bridge, Ireland
- Average pressure in December: 1010.9mbar
The month with the highest atmospheric pressure is May (1015.9mbar).
The month with the lowest atmospheric pressure is November (1008.2mbar).
Average wind speed in December
Johnstown Bridge, Ireland
- Average wind speed in December: 20.1km/h
The windiest month (with the highest average wind speed) is January (20.3km/h).
The calmest months (with the lowest average wind speed) are June and July (13.3km/h).
Average humidity in December
Johnstown Bridge, Ireland
- Average humidity in December: 91%
The month with the highest relative humidity is December (91%).
The months with the lowest relative humidity are March and April (85%).
Average rainfall in December
Johnstown Bridge, Ireland
- Average rainfall in December: 19mm
The wettest month (with the highest rainfall) is August (33mm).
The driest months (with the least rainfall) are January, April and October (16mm).
Average rainfall days in December
Johnstown Bridge, Ireland
- Average rainfall days in December: 11.8 days
The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (10.6 days).
Average snowfall in December
Johnstown Bridge, Ireland
- Average snowfall in December: 4mm
The month with the highest snowfall is January (15mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Johnstown Bridge, Ireland
- Average snowfall days in December: 0.8 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Johnstown Bridge, Ireland
- Average daylight in December: 7h and 4min
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 December: 4h and 1min
The month with the most sunshine is April (Average sunshine: 6h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in December
Johnstown Bridge, Ireland
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is July (5.8 days).
Average UV index in December
Johnstown Bridge, Ireland
- Average UV index in December: 2
The months with the highest UV index are May, June 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
Johnstown Bridge, Ireland
- Average cloud cover in December: 59
The month with the most cloud cover is July (Cloud cover 67).
The month with the least cloud cover is April (Cloud cover 56).
Average visibility in December
Johnstown Bridge, Ireland
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, October, November and December (9km).
The months with the lowest visibility are June, July, August and September (8km).
