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
The onset of January brings an average high-temperature of a still subzero cold 29.1°F (-1.6°C), nearly matching the December temperature. During January, Dayton sees a mean low-temperature of 13.5°F (-10.3°C).Humidity
With an average relative humidity of 90%, January is the most humid month.Rainfall
In Dayton, in January, during 8.9 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. In Dayton, during the entire year, the rain falls for 127.4 days and collects up to 18.27" (464mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. The month with the most snowfall is January, when snow falls for 17.6 days and typically aggregates up to 16.73" (425mm) of snow.Daylight
The average length of the day in January in Dayton is 9h and 32min.On the first day of January in Dayton, sunrise is at 7:56 am and sunset at 5:06 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:40 pm MST.
Sunshine
With an average of 4.8h of sunshine, January has the least sunshine of the year.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 1 in January translates into this advice:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
How cold is January in Dayton?
What is the most humid month in Dayton?
What is the average humidity in January in Dayton?
How many days does it rain in January in Dayton?
What is the snowiest month in Dayton?
How much does it snow in Dayton in January?
How many hours of daylight does Dayton have in January?
What time are sunrise and sunset in January in Dayton?
What is the month with the least sunshine in Dayton?
How long on average sun shines in January in Dayton?
What is the month with the lowest UV index in Dayton?
What is the UV index reading in January in Dayton?
Average temperature in January
Dayton, ID
- Average high temperature in January: 29.1°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in January: 13.5°F
The month with the highest average low temperature is July (53.8°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in January
Dayton, ID
- Average pressure in January: 30.3"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in January
Dayton, ID
- Average wind speed in January: 4.2mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in January
Dayton, ID
- Average humidity in January: 90%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (38%).
Average rainfall in January
Dayton, ID
- Average rainfall in January: 2.2"
The wettest month (with the highest rainfall) is February (2.24").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in January
Dayton, ID
- Average rainfall days in January: 8.9 days
The month with the highest number of rainy days is April (16.6 days).
The month with the least rainy days is July (5.5 days).
Average snowfall in January
Dayton, ID
- Average snowfall in January: 16.73"
The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").
Average snowfall days in January
Dayton, ID
- Average snowfall days in January: 17.6 days
The months with the highest number of snowfall days are January and February (17.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in January /
Average sunshine in January
Dayton, ID
- Average daylight in January: 9h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January: 4h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in January
Dayton, ID
- Average sunshine days in January: 12.6 days
The month with the most sunshine days is July (21.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in January
Dayton, ID
- Average UV index in January: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Dayton, ID
- Average cloud cover in January: 48
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in January
Dayton, ID
- Average visibility in January: 4mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
Dayton, Idaho, USA
Weather forecast for your location
2. Allow the app to use your location
