Expand
Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Saint Augustine, Illinois, is a freezing cold winter month, with an average temperature varying between 29.8°F (-1.2°C) and 17.8°F (-7.9°C). The coldest period tends to be January, when average temperatures fluctuate between a high of 29.8°F (-1.2°C) and a low of 17.8°F (-7.9°C). Weather in January »
Weather in February
February, the last month of the winter in Saint Augustine, is a cold month, with an average temperature ranging between min 21.7°F (-5.7°C) and max 34.9°F (1.6°C). At the start of February, Saint Augustine's average high-temperature reaches a cold 34.9°F (1.6°C), subtly different from the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Saint Augustine, is a frosty month, with an average temperature fluctuating between 48.2°F (9°C) and 33.3°F (0.7°C). March's arrival coincides with a rise in the average high-temperature, moving from February's icy 34.9°F (1.6°C) to a chilly 48.2°F (9°C). Weather in March »
Weather in April
April is a refreshing spring month in Saint Augustine, Illinois, with an average temperature varying between 43.7°F (6.5°C) and 60.4°F (15.8°C). With the onset of April, Saint Augustine sees a temperature rise, with the average high-temperature moving from March's chilly 48.2°F (9°C) to a mild 60.4°F (15.8°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Saint Augustine, Illinois, with an average temperature fluctuating between 71.1°F (21.7°C) and 54.5°F (12.5°C). Saint Augustine in May shows a temperature shift, moving from an average high of a mild 60.4°F (15.8°C) in April to an agreeable 71.1°F (21.7°C). Weather in May »
Weather in June
June, the first month of the summer in Saint Augustine, is a warm month, with an average temperature fluctuating between 79.5°F (26.4°C) and 63.1°F (17.3°C). June's arrival brings a slight change in high-temperatures, adjusting from a pleasant 71.1°F (21.7°C) in May to a warm 79.5°F (26.4°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Saint Augustine, Illinois, with an average temperature ranging between min 64.9°F (18.3°C) and max 82°F (27.8°C). July tends to be the warmest month, with temperatures averaging a daily high of 82°F (27.8°C) and a low of 64.9°F (18.3°C). The heat index for July is calculated to be a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Saint Augustine, is also a moderately hot month, with temperature in the range of an average low of 63.3°F (17.4°C) and an average high of 81.1°F (27.3°C). The arrival of August brings an average high-temperature of a still warm 81.1°F (27.3°C), closely following the temperature pattern of July. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Saint Augustine, Illinois, with an average temperature ranging between max 76.1°F (24.5°C) and min 56.7°F (13.7°C). The unfolding of September shows an average high-temperature of a still warm 76.1°F (24.5°C), indicating a slight variance from August's 81.1°F (27.3°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Saint Augustine, Illinois, with an average temperature varying between 61.7°F (16.5°C) and 45.7°F (7.6°C). The changeover to October signals a significant decrease in the average high-temperature, dropping from a warm 76.1°F (24.5°C) in September to an enjoyable 61.7°F (16.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Saint Augustine, Illinois, with temperature in the range of an average low of 34°F (1.1°C) and an average high of 47.5°F (8.6°C). With November's arrival, Saint Augustine sees a decrease in average high-temperatures, moving from a comfortable 61.7°F (16.5°C) in October to a chilly 47.5°F (8.6°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Saint Augustine, Illinois, with an average temperature fluctuating between 25°F (-3.9°C) and 35.8°F (2.1°C). The arrival of December indicates a decrease in the average high-temperature, moving from a frosty 47.5°F (8.6°C) in November to an icy 35.8°F (2.1°C). Weather in December »
Updated: Aug 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
January, with its high-temperature average of 29.8°F (-1.2°C) and a low-temperature average of 17.8°F (-7.9°C), is the coldest month.
What is the driest month?
January and December are months with the least rain 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, during the entire year, the rain falls for 126 days and collects up to 14.45" (367mm) of precipitation.
When does it snow in Saint Augustine?
Months with snowfall are January through April, October through December.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 10.3 days and typically aggregates up to 1.26" (32mm) of snow.
How much does it snow?
Throughout the year, there are 32.2 snowfall days, and 4.8" (122mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.1h of sunshine.
When is the lowest UV index?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
When is Daylight Saving Time (DST) in Saint Augustine?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the wettest month?
The month with the most rainfall is May, when the rain falls for 16.3 days and typically aggregates up to 2.2" (56mm) of precipitation.
When it does not snow?
In Saint Augustine, snow does not fall in May through September.
When are the longest days?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What are the months with the most sunshine?
June and July, with an average of 10.1h of sunshine, are months with the most sunshine.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What are the warmest months?
With its average high temperature of 82°F (27.8°C) and a low of 64.9°F (18.3°C), July is regarded as the warmest month.
What is the most humid month?
July is the most humid month, with an average relative humidity of 84%.
What is the least humid month?
With an average relative humidity of 72%, October is the least humid month.
What is the month with the shortest days?
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Saint Augustine, IL
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).
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).
Average pressure
Saint Augustine, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.11"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).
Average wind speed
Saint Augustine, IL
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.5mph - Average wind speed in April:
10.7mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.4mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.9mph
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).
Average humidity
Saint Augustine, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Saint Augustine, IL
- Average rainfall in January:
0.59" - Average rainfall in February:
0.67" - Average rainfall in March:
0.98" - Average rainfall in April:
1.61" - Average rainfall in May:
2.2" - Average rainfall in June:
1.69"
- Average rainfall in July:
1.54" - Average rainfall in August:
1.18" - Average rainfall in September:
1.22" - Average rainfall in October:
1.34" - Average rainfall in November:
0.83" - Average rainfall in December:
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").
Average rainfall days
Saint Augustine, IL
- Average rainfall days in January:
4.7 days - Average rainfall days in February:
4.4 days - Average rainfall days in March:
10.5 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
14.4 days - Average rainfall days in August:
12.1 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
6.8 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).
Average snowfall
Saint Augustine, IL
The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Saint Augustine, IL
- Average snowfall days in January:
10.3 days - Average snowfall days in February:
7.4 days - Average snowfall days in March:
3.7 days - Average snowfall days in April:
1.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.3 days - Average snowfall days in November:
2.3 days - Average snowfall days in December:
7.1 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).
Average daylight / Average sunshine
Saint Augustine, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
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 - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 3min
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).
Average sunshine days
Saint Augustine, IL
- Average sunshine days in January:
17.3 days - Average sunshine days in February:
16.8 days - Average sunshine days in March:
16.5 days - Average sunshine days in April:
12.6 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
11.4 days
- Average sunshine days in July:
11.2 days - Average sunshine days in August:
14.8 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
19.6 days - Average sunshine days in December:
18.1 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).
Average UV index
Saint Augustine, IL
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).
Average cloud cover
Saint Augustine, IL
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility
Saint Augustine, IL
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).
Saint Augustine, Illinois, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location