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 brings a marginal elevation to a still subzero cold 26.2°F (-3.2°C) from December's 25.2°F (-3.8°C) in Alton's average high-temperatures. During January, Alton's temperature averages to a frigid cold 7.9°F (-13.4°C) at night.Humidity
The months with the highest humidity are January and February, with an average relative humidity of 92%.Rainfall
In January, the rain falls for 6 days. Throughout January, 2.17" (55mm) of precipitation is accumulated. Throughout the year, there are 117.5 rainfall days, and 20.24" (514mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. In January, it is snowing for 19.8 days. Throughout January, 18.11" (460mm) of snow is accumulated. In Alton, during the entire year, snow falls for 116.1 days and aggregates up to 91.14" (2315mm) of snow.Daylight
In Alton, the average length of the day in January is 9h and 31min.On the first day of January, sunrise is at 7:53 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:37 pm MST.
Sunshine
The month with the least sunshine is January, with an average of 4.4h of sunshine.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Alton. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: A maximum high daily UV index of 1 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 best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What is the most humid month?
What is the average humidity in January?
How many days does it rain in January in Alton?
How much does it snow in January?
How many hours of daylight does Alton have in January?
When is the sunrise / sunset in January in Alton?
What is the month with the least sunshine?
How long on average sun shines in January?
What are the months with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Alton, ID
- Average high temperature in January: 26.2°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is December (25.2°F).
- Average low temperature in January: 7.9°F
The month with the highest average low temperature is July (48.9°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in January
Alton, ID
- Average pressure in January: 30.29"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in January
Alton, ID
- Average wind speed in January: 4.2mph
The windiest month (with the highest average wind speed) is June (5.8mph).
The calmest months (with the lowest average wind speed) are January and December (4.2mph).
Average humidity in January
Alton, ID
- Average humidity in January: 92%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is August (42%).
Average rainfall in January
Alton, ID
- Average rainfall in January: 2.17"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in January
Alton, ID
- Average rainfall days in January: 6 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (6 days).
Average snowfall in January
Alton, ID
- Average snowfall in January: 18.11"
The month with the highest snowfall is February (18.39").
The months with the least snowfall are July and August (0").
Average snowfall days in January
Alton, ID
- Average snowfall days in January: 19.8 days
The month with the highest number of snowfall days is December (21.6 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in January /
Average sunshine in January
Alton, 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 2min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in January
Alton, ID
- Average sunshine days in January: 11.3 days
The month with the most sunshine days is July (18.8 days).
The month with the least sunshine days is February (6.8 days).
Average UV index in January
Alton, ID
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in January
Alton, ID
- Average cloud cover in January: 57
The month with the most cloud cover is February (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in January
Alton, ID
- Average visibility in January: 3mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
Alton, Idaho, USA
Weather forecast for your location
2. Allow the app to use your location