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 coldest time of the year is January, with temperatures averaging a high of 43.3°F (6.3°C) and a low of 28.4°F (-2°C).Humidity
In Alton, the average relative humidity in January is 74%.Rainfall
In Alton, in January, it is raining for 8.6 days, with typically 2.56" (65mm) of accumulated precipitation. Throughout the year, there are 148 rainfall days, and 35.39" (899mm) of precipitation is accumulated.Snowfall
Months with snowfall in Alton are January through April, November and December. In Alton, Missouri, in January, snow falls for 2.5 days, with typically accumulated 0.71" (18mm) of snow. Throughout the year, in Alton, there are 8.9 snowfall days, and 4.57" (116mm) of snow is accumulated.Daylight
In January, the average length of the day in Alton is 9h and 59min.On the first day of January in Alton, sunrise is at 7:17 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:29 pm CST.
Sunshine
In Alton, the average sunshine in January is 5.1h.UV index
The months with the lowest UV index in Alton are January and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: During January, 2 as the daily maximum UV index converts into the following advice:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Avoiding the Sun during its peak radiation time around midday is a healthy practice. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
What are the coldest months in Alton?
How cold is January 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?
What is the average length of the day in January in Alton?
What time are sunrise and sunset in January in Alton?
How many hours of sunshine does Alton have in January?
What are the months with the lowest UV index in Alton?
What is the UV index intensity in January in Alton?
Average temperature in January
Alton, MO
- Average high temperature in January: 43.3°F
The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in January: 28.4°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in January
Alton, MO
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Alton, MO
- Average wind speed in January: 8.1mph
The windiest months (with the highest average wind speed) are January, February, March and April (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in January
Alton, MO
- Average humidity in January: 74%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Alton, MO
- Average rainfall in January: 2.56"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in January
Alton, MO
- Average rainfall days in January: 8.6 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in January
Alton, MO
- Average snowfall in January: 0.71"
The month with the highest snowfall is February (1.26").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Alton, MO
- Average snowfall days in January: 2.5 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Alton, MO
- Average daylight in January: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in January
Alton, MO
- Average sunshine days in January: 19.3 days
The month with the most sunshine days is December (19.6 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in January
Alton, MO
- Average UV index in January: 2
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in January
Alton, MO
- Average cloud cover in January: 45
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in January
Alton, MO
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are May and July (5mi).
Alton, Missouri, USA
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