January weather forecastSullivan, OH
January
Weather in January
January, like December, is another subzero cold winter month in Sullivan, Ohio, with an average temperature varying between 18.5°F (-7.5°C) and 30.9°F (-0.6°C).Temperature
With average temperatures fluctuating between a high of 30.9°F (-0.6°C) and a low of 18.5°F (-7.5°C), January stands out as the coldest month.Humidity
In Sullivan, the average relative humidity in January is 86%.Rainfall
In Sullivan, in January, during 4.9 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. In Sullivan, Ohio, during the entire year, the rain falls for 128.1 days and collects up to 13.31" (338mm) of precipitation.Snowfall
Months with snowfall in Sullivan, Ohio, are January through May, October through December. In January, in Sullivan, it is snowing for 9.7 days. Throughout January, 1.18" (30mm) of snow is accumulated. Throughout the year, there are 38.5 snowfall days, and 5.55" (141mm) of snow is accumulated.Daylight
In January, the average length of the day in Sullivan is 9h and 37min.On the first day of January, sunrise is at 7:53 am and sunset at 5:10 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 5:43 pm EST.
Sunshine
January has the least sunshine of the year, with an average of 2.9h of sunshine.UV index
In Sullivan, the average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 2 during January morphs into the following directions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Sullivan, OH
- Average high temperature in January: 30.9°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in January: 18.5°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in January
Sullivan, OH
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Sullivan, OH
- Average wind speed in January: 9.5mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).
Average humidity in January
Sullivan, OH
- Average humidity in January: 86%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April and November (78%).
Average rainfall in January
Sullivan, OH
- Average rainfall in January: 0.79"
The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is February (0.75").
Average rainfall days in January
Sullivan, OH
- Average rainfall days in January: 4.9 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (4.9 days).
Average snowfall in January
Sullivan, OH
- Average snowfall in January: 1.18"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Sullivan, OH
- Average snowfall days in January: 9.7 days
The month with the highest number of snowfall days is February (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Sullivan, OH
- Average daylight in January: 9h and 36min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 2h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in January
Sullivan, OH
- Average sunshine days in January: 18.1 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in January
Sullivan, OH
- Average UV index in January: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Sullivan, OH
- Average cloud cover in January: 71
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in January
Sullivan, OH
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
