January weather forecast
Dover, IL

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Weather in January

January, the same as December, in Dover, Illinois, is a freezing cold winter month, with temperature in the range of an average low of 16.5°F (-8.6°C) and an average high of 28.8°F (-1.8°C).

Temperature

January is the coldest month, with an average high-temperature of 28.8°F (-1.8°C) and an average low-temperature of 16.5°F (-8.6°C).

Humidity

In Dover, the average relative humidity in January is 83%.

Rainfall

The month with the least rainfall in Dover is January, when the rain falls for 4.8 days and typically collects 0.75" (19mm) of precipitation.

Snowfall

Months with snowfall in Dover are January through April, October through December. The month with the most snowfall is January, when snow falls for 10.4 days and typically aggregates up to 2.09" (53mm) of snow.

Daylight

The average length of the day in January in Dover is 9h and 35min.
On the first day of the month, sunrise is at 7:23 am and sunset at 4:38 pm. On the last day of January, in Dover, sunrise is at 7:10 am and sunset at 5:11 pm CST.

Sunshine

With an average of 3.8h of sunshine, January has the least sunshine of the year.

UV index

The months with the lowest UV index in Dover are January and December, 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 average individuals.
Note: The maximum UV index of 1 during January translates into these guidelines:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
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Frequently asked questions

What time of the year is the coldest in Dover?

Dover's coldest weather arrives in January, when temperatures average a high of 28.8°F (-1.8°C) and a low of 16.5°F (-8.6°C).

How cold is it in Dover in January?

The average high-temperature and low-temperature during January are 28.8°F (-1.8°C) and 16.5°F (-8.6°C) respectively.

What is the average humidity in January in Dover?

The average relative humidity in January in Dover, Illinois, is 83%.

What is the driest month in Dover?

The month with the least rainfall in Dover, Illinois, is January, when the rain falls for 4.8 days and typically collects 0.75" (19mm) of precipitation.

How many days does it rain in January in Dover?

In Dover, Illinois, in January, it is raining for 4.8 days, with typically 0.75" (19mm) of accumulated precipitation.

What is the snowiest month in Dover?

The month with the most snowfall in Dover is January, when snow falls for 10.4 days and typically aggregates up to 2.09" (53mm) of snow.

How much does it snow in Dover in January?

In Dover, Illinois, during January, snow falls for 10.4 days and regularly aggregates up to 2.09" (53mm) of snow.

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

In Dover, Illinois, the average day length in January is 9h and 35min.

When is the sunrise / sunset in January in Dover?

In January, on the first day of the month, sunrise is at 7:23 am and sunset at 4:38 pm. On the last day of the month, in Dover, sunrise is at 7:10 am and sunset at 5:11 pm CST.

What is the month with the least sunshine in Dover?

January has the least sunshine of the year in Dover, with an average of 3.8h of sunshine.

How long on average sun shines in January in Dover?

The average sunshine duration in January is 3.8h.

What are the months with the lowest UV index in Dover?

The months with the lowest UV index are January and December, with an average maximum UV index of 1.

What is the UV index reading in January in Dover?

In January, the average daily maximum UV index in Dover is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
34.5°F 1.4°C
28.8°F -1.8°C
32.7°F 0.4°C
Average low temperature
24.1°F -4.4°C
16.5°F -8.6°C
19.8°F -6.8°C
Average pressure
30.1" 765mmHg
30.13" 765mmHg
30.11" 765mmHg
Average wind speed
9.6mph 15.4km/h
10.3mph 16.6km/h
10.3mph 16.6km/h
Average max. wind speed
10.3mph 16.6km/h
10.9mph 17.5km/h
10.9mph 17.5km/h
Average wind speed gusts
15.5mph 24.9km/h
16.3mph 26.2km/h
16.2mph 26.1km/h
Average humidity
82%
83%
82%
Average rainfall
0.91" 23mm
0.75" 19mm
0.83" 21mm
Average rainfall days
6.2
4.8
4.5
Average snowfall
1.14" 29mm
2.09" 53mm
1.54" 39mm
Average snowfall days
7.1
10.4
8.5
Average daylight
9h 1min
9h 4min
10h 4min
Average sunshine
4h 1min
3h 5min
4h 0min
Average sunshine days
17.5
17.8
15.6
Average UV index
1
1
2
Average cloud cover
56%
60%
57%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Dover, IL

Average temperature in January - Dover, IL
  • Average high temperature in January: 28.8°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in January: 16.5°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).

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Average pressure in January
Dover, IL

Average pressure in January - Dover, IL
  • Average pressure in January: 30.13"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in January
Dover, IL

Average wind speed in January - Dover, IL
  • Average wind speed in January: 10.3mph

The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

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Average humidity in January
Dover, IL

Average humidity in January - Dover, IL
  • Average humidity in January: 83%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in January
Dover, IL

Average rainfall in January - Dover, IL
  • Average rainfall in January: 0.75"

The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is January (0.75").

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Average rainfall days in January
Dover, IL

Average rainfall days in January - Dover, IL
  • Average rainfall days in January: 4.8 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.5 days).

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Average snowfall in January
Dover, IL

Average snowfall in January - Dover, IL
  • Average snowfall in January: 2.09"

The month with the highest snowfall is January (2.09").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Dover, IL

Average snowfall days in January - Dover, IL
  • Average snowfall days in January: 10.4 days

The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are May, June, July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in January: 3h and 5min

The months with the most sunshine are June and July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days in January
Dover, IL

Average sunshine days in January - Dover, IL
  • Average sunshine days in January: 17.8 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (11.8 days).

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Average UV index in January
Dover, IL

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

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

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Average cloud cover in January
Dover, IL

Average cloud cover in January - Dover, IL
  • Average cloud cover in January: 60

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 32).

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Average visibility in January
Dover, IL

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

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

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Dover, Illinois, USA

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