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
Alton, Idaho, marks the start of January with an average high-temperature of a still freezing cold 26.2°F (-3.2°C), hinting at a slight fluctuation from December's 25.2°F (-3.8°C). In the month of January, Alton's average low-temperature falls to an extreme cold 7.9°F (-13.4°C).Humidity
January and February, with an average relative humidity of 92%, are the most humid months.Rainfall
In Alton, in January, during 6 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, in Alton, there are 117.5 rainfall days, and 20.24" (514mm) of precipitation is accumulated.Snowfall
Months with snowfall in Alton are January through June, September through December. In Alton, during January, snow falls for 19.8 days and regularly aggregates up to 18.11" (460mm) of snow. In Alton, during the entire year, snow falls for 116.1 days and aggregates up to 91.14" (2315mm) of snow.Daylight
The average length of the day in January is 9h and 31min.On the first day of the month, sunrise is at 7:53 am and sunset at 5:02 pm. On the last day of January, in Alton, sunrise is at 7:38 am and sunset at 5:37 pm MST.
Sunshine
January has the least sunshine of the year in Alton, with an average of 4.4h of sunshine.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 1 in January interprets into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
How cold is it in Alton in January?
What are the most humid months in Alton?
What is the average humidity in January in Alton?
How much does it rain in Alton in January?
How much does it snow in Alton 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 in Alton?
How long on average sun shines in January in Alton?
When is the lowest UV index in Alton?
What is the UV index reading in January in Alton?
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
