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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 Winchester, Illinois, with an average temperature varying between 33.8°F (1°C) and 21.6°F (-5.8°C). In Winchester, the lowest average temperatures are observed in January, with a high of 33.8°F (1°C) and a low of 21.6°F (-5.8°C). Weather in January »
Weather in February
The last month of the winter, February, is another cold month in Winchester, Illinois, with an average temperature ranging between max 38.8°F (3.8°C) and min 25.2°F (-3.8°C). Winchester records an average high-temperature of a still wintry 38.8°F (3.8°C) in February, closely mirroring the climate of the previous month. Weather in February »
Weather in March
March, the first month of the spring in Winchester, is a cool month, with an average temperature fluctuating between 36.1°F (2.3°C) and 51.8°F (11°C). In March, the average high-temperature increases from an icy 38.8°F (3.8°C) in February to a cool 51.8°F (11°C). Weather in March »
Weather in April
April is an enjoyable spring month in Winchester, Illinois, with an average temperature varying between 63.5°F (17.5°C) and 46°F (7.8°C). In Winchester, the onset of April comes with an increased average high-temperature, moving from March's cool 51.8°F (11°C) to an enjoyable 63.5°F (17.5°C). Weather in April »
Weather in May
May, the last month of the spring in Winchester, is a pleasant month, with temperature in the range of an average high of 73°F (22.8°C) and an average low of 55.9°F (13.3°C). Winchester's weather shows a temperature rise with the arrival of May, moving from a refreshing 63.5°F (17.5°C) in April to an agreeable 73°F (22.8°C). Weather in May »
Weather in June
June, the first month of the summer in Winchester, is a warm month, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 64.4°F (18°C). The shift from May to June introduces a subtle increase in the average high-temperature, moving from a pleasant 73°F (22.8°C) to a moderately hot 81.9°F (27.7°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Winchester, Illinois, with an average temperature ranging between max 84°F (28.9°C) and min 66.7°F (19.3°C). July tends to be the warmest month, with temperatures averaging a daily high of 84°F (28.9°C) and a low of 66.7°F (19.3°C). In July, the heat index is computed to be a fiery hot 95°F (35°C). Weather in July »
Weather in August
August, the last month of the summer in Winchester, is another warm month, with temperature in the range of an average high of 83.5°F (28.6°C) and an average low of 64.9°F (18.3°C). Winchester's August average high-temperature settles at a still moderately hot 83.5°F (28.6°C), showing a near match with the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Winchester, is also a moderately hot month, with an average temperature fluctuating between 58.8°F (14.9°C) and 78.1°F (25.6°C). In September, the average high-temperature marginally drops from 83.5°F (28.6°C) in August to a still moderately hot 78.1°F (25.6°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Winchester, Illinois, with an average temperature ranging between min 47.3°F (8.5°C) and max 64.2°F (17.9°C). The shift from September to October involves a decrease in the average high-temperature, from a moderately hot 78.1°F (25.6°C) to a comfortable 64.2°F (17.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Winchester, Illinois, with an average temperature fluctuating between 36.3°F (2.4°C) and 51.1°F (10.6°C). With the onset of November, Winchester experiences a modest temperature adjustment, with the average high-temperature receding from a comfortable 64.2°F (17.9°C) in October to a fresh 51.1°F (10.6°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Winchester, Illinois, with an average temperature varying between 39.2°F (4°C) and 27.9°F (-2.3°C). As November shifts into December, a slight alteration in temperatures is observed, with average highs reducing from a cool 51.1°F (10.6°C) to an icy 39.2°F (4°C). Weather in December »
Updated: Jul 30, 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 are the coldest months?
The month of January, characterized by an average high of 33.8°F (1°C) and a low of 21.6°F (-5.8°C), is recognized as the coldest.
What is the driest month?
The months with the least rainfall are January, February and December Rain falls for 7.5 days and accumulates 1.73" (44mm) of rain.
How many days does it rain?
Throughout the year, there are 155.4 rainfall days, and 31.69" (805mm) of precipitation is accumulated.
When does it snow?
January through April, October through December are months with snowfall.
When does it snow the most?
January is the month with the most snowfall in Winchester. Snow falls for 9.8 days and accumulates 3.46" (88mm) of snow.
How much does it snow?
In Winchester, Illinois, during the entire year, snow falls for 30.2 days and aggregates up to 10.75" (273mm) of snow.
What is the month with the least sunshine in Winchester?
With an average of 4.3h of sunshine, January has the least sunshine of the year.
When is the lowest UV index?
The months with the lowest UV index in Winchester are January, February, November and December, with an average maximum UV index of 2.
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.
What is the rainiest month?
May is the month with the most rainfall in Winchester. Rain falls for 18.8 days and accumulates 4.02" (102mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
When are the longest days?
With an average of 14h and 54min of daylight, June has the longest days of the year.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10.3h of sunshine.
When is the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What part of the year is the hottest?
July, with its high-temperature average of 84°F (28.9°C) and a low-temperature average of 66.7°F (19.3°C), is the warmest month.
What is the most humid month?
The most humid month is July, with an average relative humidity of 82%.
What is the least humid month?
With an average relative humidity of 71%, October is the least humid month.
What is the month with the shortest days in Winchester?
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
Winchester, IL
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (33.8°F).
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure
Winchester, 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:
29.93"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:
30.03"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Winchester, IL
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.7mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8mph - Average wind speed in June:
7mph
- Average wind speed in July:
6mph - Average wind speed in August:
6.1mph - Average wind speed in September:
6.8mph - Average wind speed in October:
8.5mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.4mph
The windiest months (with the highest average wind speed) are January and April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity
Winchester, IL
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Winchester, IL
- Average rainfall in January:
1.73" - Average rainfall in February:
1.73" - Average rainfall in March:
2.44" - Average rainfall in April:
3.54" - Average rainfall in May:
4.02" - Average rainfall in June:
3.9"
The wettest month (with the highest rainfall) is May (4.02").
The driest months (with the least rainfall) are January, February and December (1.73").
Average rainfall days
Winchester, IL
- Average rainfall days in January:
7.5 days - Average rainfall days in February:
7.2 days - Average rainfall days in March:
14.6 days - Average rainfall days in April:
15.9 days - Average rainfall days in May:
18.8 days - Average rainfall days in June:
17 days
- Average rainfall days in July:
17.6 days - Average rainfall days in August:
14.9 days - Average rainfall days in September:
12.2 days - Average rainfall days in October:
12.1 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
8.1 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (7.2 days).
Average snowfall
Winchester, IL
The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Winchester, IL
- Average snowfall days in January:
9.8 days - Average snowfall days in February:
7.9 days - Average snowfall days in March:
3.5 days - Average snowfall days in April:
0.7 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:
2.3 days - Average snowfall days in December:
5.9 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Winchester, 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 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 2min
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 24min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 4min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 2min
- 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 5min - Average sunshine in November:
5h and 2min - 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 18min).
Average sunshine days
Winchester, IL
- Average sunshine days in January:
15.5 days - Average sunshine days in February:
14.4 days - Average sunshine days in March:
12.3 days - Average sunshine days in April:
11.7 days - Average sunshine days in May:
9.8 days - Average sunshine days in June:
8.6 days
- Average sunshine days in July:
9.8 days - Average sunshine days in August:
12.8 days - Average sunshine days in September:
15.4 days - Average sunshine days in October:
17.2 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
17.9 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (8.6 days).
Average UV index
Winchester, 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
Winchester, IL
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).
Average visibility
Winchester, 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).
Winchester, Illinois, USA
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