January weather forecast
Roseville, IL

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Weather in January

January, like December, is another subzero cold winter month in Roseville, Illinois, with temperature in the range of an average high of 29.7°F (-1.3°C) and an average low of 17.6°F (-8°C).

Temperature

Temperature readings reach their annual highs in January, averaging 29.7°F (-1.3°C) and a minimum average of 17.6°F (-8°C).

Humidity

In Roseville, the average relative humidity in January is 82%.

Rainfall

January is the month with the least rainfall in Roseville. Rain falls for 5.9 days and accumulates 1.46" (37mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. The month with the most snowfall is January, when snow falls for 10.9 days and typically aggregates up to 4.61" (117mm) of snow.

Daylight

The average length of the day in January is 9h and 39min.
On the first day of the month, sunrise is at 7:26 am and sunset at 4:45 pm. On the last day of January, in Roseville, sunrise is at 7:13 am and sunset at 5:18 pm CST.

Sunshine

With an average of 4.1h of sunshine, January has the least sunshine of the year.

UV index

With an average maximum UV index of 1, January is the month with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In January, a daily UV index of 1 turns into the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the coldest month in Roseville?

January, characterized by an average high temperature of 29.7°F (-1.3°C) and a low temperature of 17.6°F (-8°C), is generally the coldest month in Roseville.

How cold is it in Roseville in January?

In January, the average high-temperature and low-temperature in Roseville are 29.7°F (-1.3°C) and 17.6°F (-8°C) respectively.

What is the average humidity in January in Roseville?

In Roseville, Illinois, the average relative humidity in January is 82%.

What is the driest month in Roseville?

January is the month with the least rainfall in Roseville. Rain falls for 5.9 days and accumulates 1.46" (37mm) of precipitation.

How much does it rain in Roseville in January?

In January, in Roseville, the rain falls for 5.9 days. Throughout January, 1.46" (37mm) of precipitation is accumulated.

When does it snow the most in Roseville?

The month with the most snowfall is January, when snow falls for 10.9 days and typically aggregates up to 4.61" (117mm) of snow.

How much does it snow in Roseville in January?

In Roseville, during January, snow falls for 10.9 days and regularly aggregates up to 4.61" (117mm) of snow.

What is the average length of the day in January in Roseville?

The average day length in January is 9h and 39min.

When is the sunrise / sunset in January in Roseville?

In January, on the first day of the month, sunrise is at 7:26 am and sunset at 4:45 pm. On the last day of the month, in Roseville, sunrise is at 7:13 am and sunset at 5:18 pm CST.

What is the month with the least sunshine in Roseville?

The month with the least sunshine in Roseville, Illinois, is January, with an average of 4.1h of sunshine.

How many hours of sunshine does Roseville have in January?

The average sunshine duration in January is 4.1h.

What is the month with the lowest UV index in Roseville?

January is the month with the lowest UV index in Roseville, Illinois, with an average maximum UV index of 1.

How high is the UV index in January in Roseville?

In January, the average daily maximum UV index in Roseville, Illinois, is 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
35.6°F 2°C
29.7°F -1.3°C
34.9°F 1.6°C
Average low temperature
24.6°F -4.1°C
17.6°F -8°C
21.6°F -5.8°C
Average pressure
30.11" 765mmHg
30.14" 766mmHg
30.12" 765mmHg
Average wind speed
10mph 16.1km/h
10.6mph 17.1km/h
10.6mph 17.1km/h
Average max. wind speed
10.7mph 17.2km/h
11.3mph 18.2km/h
11.2mph 18km/h
Average wind speed gusts
16.1mph 25.9km/h
16.9mph 27.2km/h
16.6mph 26.7km/h
Average humidity
80%
82%
80%
Average rainfall
1.5" 38mm
1.46" 37mm
1.73" 44mm
Average rainfall days
7.5
5.9
5.8
Average snowfall
2.2" 56mm
4.61" 117mm
3.78" 96mm
Average snowfall days
8.2
10.9
9.4
Average daylight
9h 2min
9h 4min
10h 4min
Average sunshine
4h 3min
4h 1min
4h 1min
Average sunshine days
16.6
15.8
14.4
Average UV index
2
1
2
Average cloud cover
53%
57%
54%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Roseville, IL

Average temperature in January - Roseville, IL
  • Average high temperature in January: 29.7°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in January: 17.6°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).

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Average pressure in January
Roseville, IL

Average pressure in January - Roseville, IL
  • Average pressure in January: 30.14"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in January
Roseville, IL

Average wind speed in January - Roseville, IL
  • Average wind speed in January: 10.6mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

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Average humidity in January
Roseville, IL

Average humidity in January - Roseville, IL
  • Average humidity in January: 82%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in January
Roseville, IL

Average rainfall in January - Roseville, IL
  • Average rainfall in January: 1.46"

The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is January (1.46").

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Average rainfall days in January
Roseville, IL

Average rainfall days in January - Roseville, IL
  • Average rainfall days in January: 5.9 days

The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (5.8 days).

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Average snowfall in January
Roseville, IL

Average snowfall in January - Roseville, IL
  • Average snowfall in January: 4.61"

The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Roseville, IL

Average snowfall days in January - Roseville, IL
  • Average snowfall days in January: 10.9 days

The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Roseville, IL

Average daylight in January / Average sunshine in January - Roseville, IL
  • Average daylight in January: 9h and 4min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 4h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

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Average sunshine days in January
Roseville, IL

Average sunshine days in January - Roseville, IL
  • Average sunshine days in January: 15.8 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (9.2 days).

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Average UV index in January
Roseville, IL

Average UV index in January - Roseville, IL
  • Average UV index in January: 1

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in January
Roseville, IL

Average cloud cover in January - Roseville, IL
  • Average cloud cover in January: 57

The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 30).

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Average visibility in January
Roseville, IL

Average visibility in January - Roseville, IL
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).

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Roseville, Illinois, USA

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