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
An average high-temperature of a still chilly 7°C (44.6°F) marks January, exhibiting a close resemblance to the conditions in December. Castletown witnesses a consistent average low-temperature of 1.8°C (35.2°F) throughout January.Humidity
In Castletown, Ireland, the average relative humidity in January is 91%.Rainfall
In January, the rain falls for 11.6 days. Throughout January, 18mm (0.71") of precipitation is accumulated. In Castletown, during the entire year, the rain falls for 153.9 days and collects up to 280mm (11.02") of precipitation.Snowfall
Months with snowfall in Castletown are January through April, November and December. In Castletown, during January, snow falls for 2.5 days and regularly aggregates up to 13mm (0.51") of snow. Throughout the year, there are 9 snowfall days, and 58mm (2.28") of snow is accumulated.Daylight
The average length of the day in January in Castletown is 8h and 14min.On the first day of January in Castletown, sunrise is at 8:43 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 8:15 am and sunset at 5:11 pm GMT.
Sunshine
In January, the average sunshine is 3.7h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Castletown. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: An average UV index of 2 in January transforms into this advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Castletown during January?
What is the average humidity in January in Castletown?
How much does it rain in Castletown in January?
How much does it snow in Castletown in January?
What is the average length of the day in January in Castletown?
When are sunrise and sunset in January in Castletown?
How long on average sun shines in January in Castletown?
What is the month with the lowest UV index in Castletown?
What is the UV index reading in January in Castletown?
Average temperature in January
Castletown, Ireland
- Average high temperature in January: 7°C
The warmest month (with the highest average high temperature) is July (17.7°C).
The month with the lowest average high temperature is December (6.9°C).
- Average low temperature in January: 1.8°C
The month with the highest average low temperature is July (10.3°C).
The coldest month (with the lowest average low temperature) is February (1.7°C).
Average pressure in January
Castletown, Ireland
- Average pressure in January: 1010.9mbar
The month with the highest atmospheric pressure is May (1015.8mbar).
The month with the lowest atmospheric pressure is November (1007.9mbar).
Average wind speed in January
Castletown, Ireland
- Average wind speed in January: 19.5km/h
The windiest month (with the highest average wind speed) is January (19.5km/h).
The calmest month (with the lowest average wind speed) is July (13km/h).
Average humidity in January
Castletown, Ireland
- Average humidity in January: 91%
The month with the highest relative humidity is December (92%).
The month with the lowest relative humidity is April (85%).
Average rainfall in January
Castletown, Ireland
- Average rainfall in January: 18mm
The wettest month (with the highest rainfall) is November (32mm).
The driest month (with the least rainfall) is October (16mm).
Average rainfall days in January
Castletown, Ireland
- Average rainfall days in January: 11.6 days
The month with the highest number of rainy days is July (16.5 days).
The months with the least rainy days are February and September (10.6 days).
Average snowfall in January
Castletown, Ireland
- Average snowfall in January: 13mm
The month with the highest snowfall is February (15mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in January
Castletown, Ireland
- Average snowfall days in January: 2.5 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Castletown, Ireland
- Average daylight in January: 8h and 1min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in January: 3h and 4min
The month with the most sunshine is June (Average sunshine: 6h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in January
Castletown, Ireland
- Average sunshine days in January: 14.7 days
The month with the most sunshine days is September (15.9 days).
The month with the least sunshine days is July (10.9 days).
Average UV index in January
Castletown, Ireland
- Average UV index in January: 2
The months with the highest UV index are 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 January
Castletown, Ireland
- Average cloud cover in January: 63
The month with the most cloud cover is July (Cloud cover 71).
The months with the least cloud cover are April, November and December (Cloud cover 61).
Average visibility in January
Castletown, Ireland
- Average visibility in January: 9km
The months with the highest visibility are January, February, March and December (9km).
The months with the lowest visibility are April, May, June, July, August, September, October and November (8km).
Castletown, Ireland
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