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, known for its average high temperature of 23.2°F (-4.9°C) and an average low temperature of 14.2°F (-9.9°C), is the coldest month.Humidity
The months with the highest humidity are January and February, with an average relative humidity of 87%.Rainfall
In Rock, in January, during 5.8 rainfall days, 1.18" (30mm) of precipitation is typically accumulated. Throughout the year, in Rock, Michigan, there are 139.7 rainfall days, and 24.17" (614mm) of precipitation is accumulated.Snowfall
Months with snowfall in Rock are January through April, October through December. In Rock, during January, snow falls for 18.4 days and regularly aggregates up to 5.75" (146mm) of snow. In Rock, during the entire year, snow falls for 76.5 days and aggregates up to 28.46" (723mm) of snow.Daylight
In January, the average length of the day in Rock is 9h and 8min.On the first day of the month, sunrise is at 8:30 am and sunset at 5:13 pm. On the last day of January, sunrise is at 8:12 am and sunset at 5:51 pm EST.
Sunshine
The month with the least sunshine is January, with an average of 3h of sunshine.UV index
The month with the lowest UV index in Rock is January, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In January, the maximum UV index of 1 transforms into these recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Rock?
How cold is it in Rock in January?
What is the most humid month in Rock?
What is the average humidity in January in Rock?
How many days does it rain in January in Rock?
How much does it snow in Rock in January?
What is the average length of the day in January in Rock?
When are sunrise and sunset in January in Rock?
What is the month with the least sunshine in Rock?
How many hours of sunshine does Rock have in January?
When is the lowest UV index in Rock?
How high is the UV index in January in Rock?
Average temperature in January
Rock, MI
- Average high temperature in January: 23.2°F
The warmest month (with the highest average high temperature) is July (72.7°F).
The month with the lowest average high temperature is January (23.2°F).
- Average low temperature in January: 14.2°F
The month with the highest average low temperature is August (57.9°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).
Average pressure in January
Rock, MI
- Average pressure in January: 30.03"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Rock, MI
- Average wind speed in January: 10.7mph
The windiest month (with the highest average wind speed) is November (11mph).
The calmest month (with the lowest average wind speed) is June (7.6mph).
Average humidity in January
Rock, MI
- Average humidity in January: 87%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is May (75%).
Average rainfall in January
Rock, MI
- Average rainfall in January: 1.18"
The wettest month (with the highest rainfall) is October (2.91").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in January
Rock, MI
- Average rainfall days in January: 5.8 days
The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in January
Rock, MI
- Average snowfall in January: 5.75"
The month with the highest snowfall is February (6.42").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Rock, MI
- Average snowfall days in January: 18.4 days
The month with the highest number of snowfall days is January (18.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Rock, MI
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 3h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in January
Rock, MI
- Average sunshine days in January: 10.9 days
The month with the most sunshine days is September (15.3 days).
The month with the least sunshine days is February (9.9 days).
Average UV index in January
Rock, MI
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Rock, MI
- Average cloud cover in January: 69
The month with the most cloud cover is February (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in January
Rock, MI
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Rock, Michigan, USA
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