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, like December, is a freezing cold winter month in Shannon, Illinois, with an average temperature fluctuating between 25.9°F (-3.4°C) and 13.5°F (-10.3°C). The month of January sees the lowest average temperatures, reaching 25.9°F (-3.4°C) at the peak and 13.5°F (-10.3°C) at the low. Weather in January »
Weather in February
February, the last month of the winter in Shannon, is also a subzero cold month, with an average temperature varying between 29.8°F (-1.2°C) and 16.9°F (-8.4°C). Shannon's weather, upon February's arrival, documents an average high-temperature of a still freezing cold 29.8°F (-1.2°C), nearly identical to the prior month. Weather in February »
Weather in March
March, the first month of the spring in Shannon, is a chilly month, with an average temperature varying between 29.7°F (-1.3°C) and 44.2°F (6.8°C). March brings a significant increase in the average high-temperature, moving up from a freezing cold 29.8°F (-1.2°C) in February to a chilly 44.2°F (6.8°C). Weather in March »
Weather in April
April is a moderate spring month in Shannon, Illinois, with an average temperature varying between 39.9°F (4.4°C) and 56.5°F (13.6°C). The arrival of April brings a change in Shannon's weather, with average high-temperatures moving from March's frosty 44.2°F (6.8°C) to a mild 56.5°F (13.6°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Shannon, Illinois, with an average temperature varying between 68.5°F (20.3°C) and 51.4°F (10.8°C). As Shannon transitions into May, the average high-temperature shows a change, moving from a refreshing 56.5°F (13.6°C) in April to an agreeable 68.5°F (20.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Shannon, Illinois, with an average temperature ranging between max 77.2°F (25.1°C) and min 60.4°F (15.8°C). The shift from May to June introduces a subtle increase in the average high-temperature, moving from a pleasant 68.5°F (20.3°C) to a moderately hot 77.2°F (25.1°C). Weather in June »
Weather in July
July, like June, in Shannon, Illinois, is another warm summer month, with an average temperature ranging between max 79.9°F (26.6°C) and min 63.3°F (17.4°C). The warmest time of the year is July, with temperatures averaging a high of 79.9°F (26.6°C) and a low of 63.3°F (17.4°C). Weather in July »
Weather in August
August, the last month of the summer in Shannon, is another warm month, with an average temperature ranging between min 60.8°F (16°C) and max 78.4°F (25.8°C). Shannon, Illinois, experiences a subtle adjustment in high-temperatures to a still warm 78.4°F (25.8°C) with the onset of August, maintaining near parity with July's 79.9°F (26.6°C). Weather in August »
Weather in September
September, the first month of the autumn in Shannon, is also an agreeable month, with an average temperature fluctuating between 54.5°F (12.5°C) and 72.9°F (22.7°C). In September, the average high-temperature marginally drops from a warm 78.4°F (25.8°C) in August to a pleasant 72.9°F (22.7°C). Weather in September »
Weather in October
October, the same as September, in Shannon, Illinois, is a moderate autumn month, with an average temperature fluctuating between 59.4°F (15.2°C) and 43.2°F (6.2°C). The arrival of October indicates a decrease in the average high-temperature, moving from an agreeable 72.9°F (22.7°C) in September to a refreshing 59.4°F (15.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Shannon, is another chilly month, with temperature in the range of an average low of 31.3°F (-0.4°C) and an average high of 44.8°F (7.1°C). November brings a significant decrease in the average high-temperature, moving down from a refreshing 59.4°F (15.2°C) in October to a frosty 44.8°F (7.1°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Shannon, Illinois, with an average temperature ranging between min 22.3°F (-5.4°C) and max 32.5°F (0.3°C). Onset of December comes with a temperature decline, the average high falling from a chilly 44.8°F (7.1°C) in November to a cold 32.5°F (0.3°C). Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Shannon?
Shannon, Illinois, reaches its average lowest temperatures in January, measuring 25.9°F (-3.4°C) at the peak and 13.5°F (-10.3°C) at the lowest.
What is the most humid month in Shannon?
January is the most humid month in Shannon, with an average relative humidity of 87%.
What is the driest month in Shannon?
The months with the least rainfall are January and February Rain falls for 4.8 days and accumulates 0.71" (18mm) of rain.
How much does it rain in Shannon?
In Shannon, Illinois, during the entire year, the rain falls for 130.8 days and collects up to 17.95" (456mm) of precipitation.
When does it snow in Shannon?
Months with snowfall are January through April, October through December.
When does it snow the most in Shannon?
January is the month with the most snowfall. Snow falls for 11.2 days and accumulates 2.64" (67mm) of snow.
How much does it snow in Shannon?
Throughout the year, in Shannon, there are 39.2 snowfall days, and 8.62" (219mm) of snow is accumulated.
What is the month with the least sunshine in Shannon?
January has the least sunshine of the year in Shannon, Illinois, with an average of 3.7h of sunshine.
When is the lowest UV index in Shannon?
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Shannon.
When is Daylight Saving Time (DST) in Shannon?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Shannon, Illinois, 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 rainiest month in Shannon?
The month with the most rainfall is May, when the rain falls for 17.9 days and typically aggregates up to 2.76" (70mm) of precipitation.
When it does not snow in Shannon?
May through September are months without snowfall.
When are the longest days in Shannon?
June has the longest days of the year in Shannon, Illinois, with an average of 15h and 12min of daylight.
What is the warmest month in Shannon?
Shannon's warmest month, July, generally records average temperatures ranging from a high of 79.9°F (26.6°C) to a low of 63.3°F (17.4°C).
What month has the most sunshine in Shannon?
July has the most sunshine of the year, with an average of 9.8h of sunshine.
When is the highest UV index in Shannon?
With an average maximum UV index of 6, July is the month with the highest UV index in Shannon.
What is the least humid month in Shannon?
With an average relative humidity of 75%, October is the least humid month in Shannon, Illinois.
What is the month with the shortest days in Shannon?
December has the shortest days of the year in Shannon, Illinois, with an average of 9h and 12min of daylight.
Average temperature
Shannon, IL
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (25.9°F).
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure
Shannon, IL
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"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:
30.03"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Shannon, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.8mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity
Shannon, IL
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (75%).
Average rainfall
Shannon, IL
- Average rainfall in January:
0.71" - Average rainfall in February:
0.71" - Average rainfall in March:
1.1" - Average rainfall in April:
1.85" - Average rainfall in May:
2.76" - Average rainfall in June:
2.48"
- Average rainfall in July:
2.05" - Average rainfall in August:
1.22" - Average rainfall in September:
1.5" - Average rainfall in October:
1.57" - Average rainfall in November:
1.14" - Average rainfall in December:
0.87"
The wettest month (with the highest rainfall) is May (2.76").
The driest months (with the least rainfall) are January and February (0.71").
Average rainfall days
Shannon, IL
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
4.4 days - Average rainfall days in March:
10.6 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
17.9 days - Average rainfall days in June:
16.4 days
- Average rainfall days in July:
15.4 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
10.7 days - Average rainfall days in October:
10.8 days - Average rainfall days in November:
7.5 days - Average rainfall days in December:
5.9 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (4.4 days).
Average snowfall
Shannon, IL
The month with the highest snowfall is January (2.64").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Shannon, IL
- Average snowfall days in January:
11.2 days - Average snowfall days in February:
9.3 days - Average snowfall days in March:
5.3 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:
0.5 days - Average snowfall days in November:
3.2 days - Average snowfall days in December:
8.6 days
The month with the highest number of snowfall days is January (11.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Shannon, IL
- Average daylight in January:
9h and 3min - 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 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - 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 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 4min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Shannon, IL
- Average sunshine days in January:
17.3 days - Average sunshine days in February:
16 days - Average sunshine days in March:
16.7 days - Average sunshine days in April:
13.9 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
10 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
16.6 days - Average sunshine days in September:
17.8 days - Average sunshine days in October:
18.6 days - Average sunshine days in November:
19.7 days - Average sunshine days in December:
18.4 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (10 days).
Average UV index
Shannon, IL
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).
Average cloud cover
Shannon, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility
Shannon, IL
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Shannon, 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
