January weather forecast
Saint Augustine, IL

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Weather in January

January, the same as December, in Saint Augustine, Illinois, is a freezing cold winter month, with temperature in the range of an average high of 29.8°F (-1.2°C) and an average low of 17.8°F (-7.9°C).

Temperature

January, with its average high-temperature of 29.8°F (-1.2°C) and an average low-temperature of 17.8°F (-7.9°C), holds the record as the coldest month.

Humidity

The average relative humidity in January is 82%.

Rainfall

January and December are months with the least rain in Saint Augustine when the rain falls for 4.7 days and typically aggregates up to 0.59" (15mm) of rain.

Snowfall

Months with snowfall are January through April, October through December. January is the month with the most snowfall. Snow falls for 10.3 days and accumulates 1.26" (32mm) of snow.

Daylight

In Saint Augustine, the average length of the day in January is 9h and 39min.
On the first day of the month, sunrise is at 7:25 am and sunset at 4:44 pm. On the last day of January, in Saint Augustine, sunrise is at 7:12 am and sunset at 5:17 pm CST.

Sunshine

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

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
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Frequently asked questions

What are the coldest months in Saint Augustine?

The coldest period is January, when temperatures fluctuate between an average high of 29.8°F (-1.2°C) and a low of 17.8°F (-7.9°C).

How cold is January in Saint Augustine?

The high-temperature, in January, in Saint Augustine, is 29.8°F (-1.2°C), while the low-temperature averages to 17.8°F (-7.9°C).

What is the average humidity in January in Saint Augustine?

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

What is the driest month in Saint Augustine?

January and December are months with the least rain in Saint Augustine when the rain falls for 4.7 days and typically aggregates up to 0.59" (15mm) of rain.

How much does it rain in Saint Augustine in January?

In Saint Augustine, in January, during 4.7 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

When does it snow the most in Saint Augustine?

January is the month with the most snowfall in Saint Augustine, Illinois. Snow falls for 10.3 days and accumulates 1.26" (32mm) of snow.

How many days does it snow in January in Saint Augustine?

In Saint Augustine, Illinois, in January, snow falls for 10.3 days, with typically accumulated 1.26" (32mm) of snow.

What is the average length of the day in January in Saint Augustine?

In Saint Augustine, Illinois, the average day length in January is 9h and 39min.

What time are sunrise and sunset in January in Saint Augustine?

On the first day of January in Saint Augustine, Illinois, sunrise is at 7:25 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:17 pm CST.

What is the month with the least sunshine in Saint Augustine?

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

How long on average sun shines in January in Saint Augustine?

The average sunshine duration in January is 4.1h.

What are the months with the lowest UV index in Saint Augustine?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Saint Augustine.

What is the UV index intensity in January in Saint Augustine?

In January, the average daily maximum UV index in Saint Augustine is 2. A UV Index estimate of 2, and below, represents a low health threat from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
35.8°F 2.1°C
29.8°F -1.2°C
34.9°F 1.6°C
Average low temperature
25°F -3.9°C
17.8°F -7.9°C
21.7°F -5.7°C
Average pressure
30.11" 765mmHg
30.14" 766mmHg
30.12" 765mmHg
Average wind speed
9.9mph 15.9km/h
10.6mph 17.1km/h
10.5mph 16.9km/h
Average max. wind speed
10.6mph 17.1km/h
11.2mph 18km/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
81%
82%
81%
Average rainfall
0.59" 15mm
0.59" 15mm
0.67" 17mm
Average rainfall days
6.8
4.7
4.4
Average snowfall
0.75" 19mm
1.26" 32mm
1.22" 31mm
Average snowfall days
7.1
10.3
7.4
Average daylight
9h 2min
9h 4min
10h 4min
Average sunshine
4h 3min
4h 1min
4h 2min
Average sunshine days
18.1
17.3
16.8
Average UV index
2
2
2
Average cloud cover
53%
57%
54%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Saint Augustine, IL

Average temperature in January - Saint Augustine, IL
  • Average high temperature in January: 29.8°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.8°F).

  • Average low temperature in January: 17.8°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 (17.8°F).

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Average pressure in January
Saint Augustine, IL

Average pressure in January - Saint Augustine, 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 (29.91"Hg).

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Average wind speed in January
Saint Augustine, IL

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

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in January
Saint Augustine, IL

Average humidity in January - Saint Augustine, 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 (72%).

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Average rainfall in January
Saint Augustine, IL

Average rainfall in January - Saint Augustine, IL
  • Average rainfall in January: 0.59"

The wettest month (with the highest rainfall) is May (2.2").
The driest months (with the least rainfall) are January and December (0.59").

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Average rainfall days in January
Saint Augustine, IL

Average rainfall days in January - Saint Augustine, IL
  • Average rainfall days in January: 4.7 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4.4 days).

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Average snowfall in January
Saint Augustine, IL

Average snowfall in January - Saint Augustine, IL
  • Average snowfall in January: 1.26"

The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Saint Augustine, IL

Average snowfall days in January - Saint Augustine, IL
  • Average snowfall days in January: 10.3 days

The month with the highest number of snowfall days is January (10.3 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
Saint Augustine, IL

Average daylight in January / Average sunshine in January - Saint Augustine, 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 months with the most sunshine are June and July (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
Saint Augustine, IL

Average sunshine days in January - Saint Augustine, IL
  • Average sunshine days in January: 17.3 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (11.2 days).

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Average UV index in January
Saint Augustine, IL

Average UV index in January - Saint Augustine, IL
  • Average UV index in January: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in January
Saint Augustine, IL

Average cloud cover in January - Saint Augustine, IL
  • Average cloud cover in January: 57

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 29).

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Average visibility in January
Saint Augustine, IL

Average visibility in January - Saint Augustine, 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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Saint Augustine, Illinois, USA

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