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
Weather in January
Temperature
In Greencastle, the lowest temperatures are generally noted in January, averaging a high of 6.3°C (43.3°F) and a low of 2.4°C (36.3°F).Humidity
January, August and December, with an average relative humidity of 88%, are the most humid months.Rainfall
In January, the rain falls for 19.3 days. Throughout January, 45mm (1.77") of precipitation is accumulated. Throughout the year, in Greencastle, there are 216.1 rainfall days, and 529mm (20.83") of precipitation is accumulated.Snowfall
Months with snowfall in Greencastle are January through March, November and December. The months with the most snowfall are January and February, with an average 21mm (0.83") of accumulated snow.Daylight
In January, the average length of the day in Greencastle is 7h and 52min.On the first day of January in Greencastle, sunrise is at 8:53 am and sunset at 4:08 pm. On the last day of the month, sunrise is at 8:21 am and sunset at 5:00 pm GMT.
Sunshine
January has the least sunshine of the year, with an average of 3.4h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: In January, the maximum UV index of 2 transforms into these recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. During bright days, sunglasses that offer UVA and UVB defense are recommended. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Frequently asked questions
What is the coldest month in Greencastle?
How cold is it in Greencastle in January?
What is the most humid month in Greencastle?
What is the average humidity in January in Greencastle?
How many days does it rain in January in Greencastle?
What is the snowiest month in Greencastle?
How much does it snow in Greencastle in January?
What is the average length of the day in January in Greencastle?
When is the sunrise / sunset in January in Greencastle?
What is the month with the least sunshine in Greencastle?
How long on average sun shines in January in Greencastle?
What is the month with the lowest UV index in Greencastle?
What is the UV index reading in January in Greencastle?
Average temperature in January
Greencastle, Ireland
- Average high temperature in January: 6.3°C
The warmest month (with the highest average high temperature) is July (16.5°C).
The month with the lowest average high temperature is January (6.3°C).
- Average low temperature in January: 2.4°C
The month with the highest average low temperature is August (10.4°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).
Average pressure in January
Greencastle, Ireland
- Average pressure in January: 1008.9mbar
The month with the highest atmospheric pressure is May (1015.2mbar).
The month with the lowest atmospheric pressure is November (1006.6mbar).
Average wind speed in January
Greencastle, Ireland
- Average wind speed in January: 21.9km/h
The windiest month (with the highest average wind speed) is January (21.9km/h).
The calmest month (with the lowest average wind speed) is July (13.8km/h).
Average humidity in January
Greencastle, Ireland
- Average humidity in January: 88%
The months with the highest relative humidity are January, August and December (88%).
The month with the lowest relative humidity is April (82%).
Average rainfall in January
Greencastle, Ireland
- Average rainfall in January: 45mm
The wettest month (with the highest rainfall) is August (60mm).
The driest month (with the least rainfall) is September (29mm).
Average rainfall days in January
Greencastle, Ireland
- Average rainfall days in January: 19.3 days
The month with the highest number of rainy days is August (21.5 days).
The month with the least rainy days is April (15.7 days).
Average snowfall in January
Greencastle, Ireland
- Average snowfall in January: 21mm
The months with the highest snowfall are January and February (21mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in January
Greencastle, Ireland
- Average snowfall days in January: 2.3 days
The month with the highest number of snowfall days is February (2.7 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
Greencastle, Ireland
- Average daylight in January: 7h and 5min
The month with the longest days is June (Average daylight: 17h and 18min).
The month with the shortest days is December (Average daylight: 7h and 12min).
- Average sunshine in January: 3h and 2min
The month with the most sunshine is June (Average sunshine: 6h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in January
Greencastle, Ireland
- Average sunshine days in January: 7.8 days
The month with the most sunshine days is April (11.1 days).
The month with the least sunshine days is August (6.3 days).
Average UV index in January
Greencastle, Ireland
- Average UV index in January: 2
The months with the highest UV index are May and June (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in January
Greencastle, Ireland
- Average cloud cover in January: 67
The month with the most cloud cover is July (Cloud cover 68).
The month with the least cloud cover is April (Cloud cover 58).
Average visibility in January
Greencastle, Ireland
- Average visibility in January: 9km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (9km).
The month with the lowest visibility is July (8km).
Greencastle, Ireland
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