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, with an average high of 33.6°F (0.9°C) and a low of 21.7°F (-5.7°C), signifies the coldest month of the year.Humidity
January, February and December, with an average relative humidity of 82%, are the most humid months.Rainfall
In January, the rain falls for 7.7 days. Throughout January, 1.57" (40mm) of precipitation is accumulated. Throughout the year, there are 149.5 rainfall days, and 23.9" (607mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. The month with the most snowfall is January, when snow falls for 8.2 days and typically aggregates up to 2.05" (52mm) of snow.Daylight
In Dayton, the average length of the day in January is 9h and 44min.On the first day of January, sunrise is at 7:57 am and sunset at 5:22 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 5:54 pm EST.
Sunshine
January has the least sunshine of the year, with an average of 3.7h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: A maximum UV index of 2 in January translates into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Direct Sun exposure should be minimized especially during midday when radiation is most intense. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
How cold is it in January?
What is the most humid month?
What is the average humidity in January?
How much does it rain in January?
What is the snowiest month in Dayton?
How much does it snow in January?
How many hours of daylight does Dayton have in January?
When is the sunrise / sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
When is the lowest UV index in Dayton?
What is the UV index intensity in January?
Average temperature in January
Dayton, OH
- Average high temperature in January: 33.6°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in January: 21.7°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in January
Dayton, OH
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Dayton, OH
- Average wind speed in January: 10mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in January
Dayton, OH
- Average humidity in January: 82%
The months with the highest relative humidity are January, February and December (82%).
The month with the lowest relative humidity is October (74%).
Average rainfall in January
Dayton, OH
- Average rainfall in January: 1.57"
The wettest month (with the highest rainfall) is May (3.35").
The driest months (with the least rainfall) are September and November (1.5").
Average rainfall days in January
Dayton, OH
- Average rainfall days in January: 7.7 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in January
Dayton, OH
- Average snowfall in January: 2.05"
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Dayton, OH
- Average snowfall days in January: 8.2 days
The month with the highest number of snowfall days is January (8.2 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
Dayton, OH
- Average daylight in January: 9h and 4min
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 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Dayton, OH
- Average sunshine days in January: 16.3 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in January
Dayton, OH
- 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
Dayton, OH
- Average cloud cover in January: 61
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in January
Dayton, OH
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Dayton, Ohio, USA
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