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
January, on average, is the coldest month, registering a high temperature of 36.1°F (2.3°C) and a low of 23.2°F (-4.9°C).Humidity
January is the most humid month, with an average relative humidity of 83%.Rainfall
In Saint Marys, West Virginia, during January, the rain falls for 11.8 days and regularly aggregates up to 2.4" (61mm) of precipitation. In Saint Marys, during the entire year, the rain falls for 177.1 days and collects up to 33.39" (848mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In January, in Saint Marys, it is snowing for 14 days. Throughout January, 4.37" (111mm) of snow is accumulated. In Saint Marys, during the entire year, snow falls for 47.1 days and aggregates up to 17.99" (457mm) of snow.Daylight
In Saint Marys, West Virginia, the average length of the day in January is 9h and 46min.On the first day of January in Saint Marys, sunrise is at 7:44 am and sunset at 5:11 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:43 pm EST.
Sunshine
The month with the least sunshine in Saint Marys is January, with an average of 3.4h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Saint Marys, West Virginia. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 2 during January translates into the following directions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Saint Marys?
How cold is it in Saint Marys in January?
What is the most humid month in Saint Marys?
What is the average humidity in January in Saint Marys?
How much does it rain in Saint Marys in January?
How much does it snow in Saint Marys in January?
What is the average length of the day in January in Saint Marys?
When are sunrise and sunset in January in Saint Marys?
What is the month with the least sunshine in Saint Marys?
How long on average sun shines in January in Saint Marys?
When is the lowest UV index in Saint Marys?
How high is the UV index in January in Saint Marys?
Average temperature in January
Saint Marys, WV
- Average high temperature in January: 36.1°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in January: 23.2°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in January
Saint Marys, WV
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in January
Saint Marys, WV
- Average wind speed in January: 6.7mph
The windiest month (with the highest average wind speed) is February (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in January
Saint Marys, WV
- Average humidity in January: 83%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (76%).
Average rainfall in January
Saint Marys, WV
- Average rainfall in January: 2.4"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in January
Saint Marys, WV
- Average rainfall days in January: 11.8 days
The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is November (10.7 days).
Average snowfall in January
Saint Marys, WV
- Average snowfall in January: 4.37"
The month with the highest snowfall is February (4.84").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Saint Marys, WV
- Average snowfall days in January: 14 days
The month with the highest number of snowfall days is January (14 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Saint Marys, WV
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January: 3h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in January
Saint Marys, WV
- Average sunshine days in January: 9.3 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (8.5 days).
Average UV index in January
Saint Marys, WV
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Saint Marys, WV
- Average cloud cover in January: 64
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in January
Saint Marys, WV
- Average visibility in January: 4mi
The months with the highest visibility are April and November (6mi).
The month with the lowest visibility is January (4mi).
Saint Marys, West Virginia, USA
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