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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, is a wintry winter month in Piasa, Illinois, with an average temperature fluctuating between 35.8°F (2.1°C) and 22.6°F (-5.2°C). With an average high-temperature of 35.8°F (2.1°C) and an average low-temperature of 22.6°F (-5.2°C), January is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is another cold month in Piasa, Illinois, with temperature in the range of an average high of 40.6°F (4.8°C) and an average low of 26.4°F (-3.1°C). The advent of February signifies a minor shift to an average high-temperature of a still wintry 40.6°F (4.8°C), aligning closely with January. Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Piasa, Illinois, with an average temperature fluctuating between 52.3°F (11.3°C) and 37°F (2.8°C). The onset of March brings a temperature shift, with the average high-temperature moving from a wintry 40.6°F (4.8°C) in February to a cool 52.3°F (11.3°C). Weather in March »
Weather in April
April in Piasa, Illinois, is a comfortable spring month, with an average temperature ranging between max 64°F (17.8°C) and min 46.8°F (8.2°C). A rise in the average high-temperature is observed during April, moving from a cool 52.3°F (11.3°C) in March to an enjoyable 64°F (17.8°C). Weather in April »
Weather in May
May, the last month of the spring in Piasa, is a warm month, with an average temperature varying between 73.9°F (23.3°C) and 56.8°F (13.8°C). The shift into May is characterized by a rise in the average high-temperature, transitioning from April's comfortable 64°F (17.8°C) to a warm 73.9°F (23.3°C). Weather in May »
Weather in June
June, the first month of the summer in Piasa, is still a warm month, with an average temperature varying between 65.7°F (18.7°C) and 82.6°F (28.1°C). June's arrival coincides with a subtle temperature rise, moving from May's moderately hot 73.9°F (23.3°C) to a still warm 82.6°F (28.1°C). Weather in June »
Weather in July
July, like June, in Piasa, Illinois, is a moderately hot summer month, with an average temperature fluctuating between 67.5°F (19.7°C) and 84.6°F (29.2°C). July is the month when Piasa experiences its warmest temperatures, averaging a high of 84.6°F (29.2°C) and a low of 67.5°F (19.7°C). Throughout July, the heat index is calculated to be a torrid 96.8°F (36°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Piasa, Illinois, with an average temperature varying between 65.5°F (18.6°C) and 83.3°F (28.5°C). Upon the onset of August, Piasa witnesses an average high-temperature of a still warm 83.3°F (28.5°C), showing a close resemblance to the prior month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Piasa, Illinois, with an average temperature varying between 78.3°F (25.7°C) and 59.4°F (15.2°C). The weather during September records an average high-temperature of a still moderately hot 78.3°F (25.7°C), closely mirroring the preceding month. Weather in September »
Weather in October
October, like September, in Piasa, Illinois, is another enjoyable autumn month, with an average temperature ranging between min 48.2°F (9°C) and max 65.3°F (18.5°C). The arrival of October indicates a decrease in the average high-temperature, moving from a warm 78.3°F (25.7°C) in September to a comfortable 65.3°F (18.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Piasa, Illinois, with temperature in the range of an average high of 51.6°F (10.9°C) and an average low of 36.7°F (2.6°C). In November, the average high-temperature goes from a comfortable 65.3°F (18.5°C) in October to a fresh 51.6°F (10.9°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Piasa, Illinois, with temperature in the range of an average low of 29.3°F (-1.5°C) and an average high of 40.6°F (4.8°C). The beginning of December involves a decrease in the average high-temperature, transitioning from a fresh 51.6°F (10.9°C) in November to an icy 40.6°F (4.8°C). Weather in December »
Updated: Jun 24, 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 month is the coldest?
January, with its high-temperature average of 35.8°F (2.1°C) and a low-temperature average of 22.6°F (-5.2°C), is the coldest month.
What is the driest month?
January is the month with the least rainfall. Rain falls for 6.5 days and accumulates 1.46" (37mm) of precipitation.
How much does it rain?
In Piasa, during the entire year, the rain falls for 141.9 days and collects up to 27.36" (695mm) of precipitation.
When does it snow?
Months with snowfall are January through March, November and December.
How much does it snow?
In Piasa, Illinois, during the entire year, snow falls for 19.8 days and aggregates up to 7.91" (201mm) of snow.
What is the month with the least sunshine?
With an average of 4.4h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Piasa?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the snowiest month?
February is the month with the most snowfall. Snow falls for 5.9 days and accumulates 2.48" (63mm) of snow.
When is Daylight Saving Time (DST)?
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.
When it does not snow?
In Piasa, snow does not fall in April through October.
What are the months with the highest UV index in Piasa?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
What is the rainiest month?
June is the month with the most rainfall. Rain falls for 15.6 days and accumulates 3.35" (85mm) of precipitation.
When are the longest days?
June has the longest days of the year, with an average of 14h and 54min of daylight.
What month has the most sunshine?
The month with the most sunshine in Piasa is June, with an average of 10.3h of sunshine.
What month is the hottest?
July tends to be the warmest month, with temperatures averaging a daily high of 84.6°F (29.2°C) and a low of 67.5°F (19.7°C).
What is the most humid month?
The most humid month is July, with an average relative humidity of 81%.
What is the least humid month?
October is the least humid month, with an average relative humidity of 71%.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Piasa, IL
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (35.8°F).
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure
Piasa, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Piasa, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.7mph - Average wind speed in March:
9.5mph - Average wind speed in April:
9.5mph - Average wind speed in May:
7.7mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.8mph - Average wind speed in September:
6.4mph - Average wind speed in October:
8.3mph - Average wind speed in November:
9.1mph - Average wind speed in December:
9.1mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity
Piasa, IL
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Piasa, IL
- Average rainfall in January:
1.46" - Average rainfall in February:
1.5" - Average rainfall in March:
2.13" - Average rainfall in April:
2.91" - Average rainfall in May:
3.31" - Average rainfall in June:
3.35"
- Average rainfall in July:
2.68" - Average rainfall in August:
2.87" - Average rainfall in September:
1.81" - Average rainfall in October:
2.05" - Average rainfall in November:
1.69" - Average rainfall in December:
1.61"
The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days
Piasa, IL
- Average rainfall days in January:
6.5 days - Average rainfall days in February:
7.2 days - Average rainfall days in March:
13.2 days - Average rainfall days in April:
14.5 days - Average rainfall days in May:
16.7 days - Average rainfall days in June:
15.6 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
10.4 days - Average rainfall days in November:
9.1 days - Average rainfall days in December:
8.1 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (6.5 days).
Average snowfall
Piasa, IL
The month with the highest snowfall is February (2.48").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Piasa, IL
- Average snowfall days in January:
6.2 days - Average snowfall days in February:
5.9 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.1 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:
0.1 days - Average snowfall days in November:
1.3 days - Average snowfall days in December:
3.9 days
The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Piasa, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Piasa, IL
- Average sunshine days in January:
19.5 days - Average sunshine days in February:
16.4 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
14 days - Average sunshine days in May:
12.2 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
12.1 days - Average sunshine days in August:
14.5 days - Average sunshine days in September:
16.7 days - Average sunshine days in October:
19.3 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
19.3 days
The month with the most sunshine days is January (19.5 days).
The month with the least sunshine days is July (12.1 days).
Average UV index
Piasa, IL
The months with the highest UV index are May, 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
Piasa, IL
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility
Piasa, IL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Piasa, Illinois, USA
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