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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 Greenville, Illinois, with an average temperature varying between 23.4°F (-4.8°C) and 36.1°F (2.3°C). January, recording an average high temperature of 36.1°F (2.3°C) and a low temperature of 23.4°F (-4.8°C), is Greenville's coldest month. Weather in January »
Weather in February
February, the last month of the winter in Greenville, is also an icy month, with temperature in the range of an average high of 41°F (5°C) and an average low of 27°F (-2.8°C). The transition into February notes an average high-temperature of a still cold 41°F (5°C), revealing a mild distinction from the 36.1°F (2.3°C) in January. Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Greenville, Illinois, with temperature in the range of an average low of 37°F (2.8°C) and an average high of 53.1°F (11.7°C). In Greenville, the onset of March comes with an increased average high-temperature, moving from February's wintry 41°F (5°C) to a fresh 53.1°F (11.7°C). Weather in March »
Weather in April
April is a refreshing spring month in Greenville, Illinois, with temperature in the range of an average low of 46.9°F (8.3°C) and an average high of 63.9°F (17.7°C). Greenville's weather shows a temperature rise with the arrival of April, moving from a fresh 53.1°F (11.7°C) in March to a comfortable 63.9°F (17.7°C). Weather in April »
Weather in May
May, the last month of the spring in Greenville, is a warm month, with temperature in the range of an average high of 73.9°F (23.3°C) and an average low of 56.8°F (13.8°C). May's arrival is marked by an increase in the average high-temperature, moving from a refreshing 63.9°F (17.7°C) in April to a moderately hot 73.9°F (23.3°C). Weather in May »
Weather in June
The first month of the summer, June, is also a moderately hot month in Greenville, Illinois, with temperature in the range of an average low of 65.8°F (18.8°C) and an average high of 82.9°F (28.3°C). An escalation in the average high-temperature is seen with the onset of June, moving from 73.9°F (23.3°C) in May to a still moderately hot 82.9°F (28.3°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Greenville, Illinois, with an average temperature ranging between max 84.4°F (29.1°C) and min 67.5°F (19.7°C). In Greenville, the highest average temperatures are observed in July, with a high of 84.4°F (29.1°C) and a low of 67.5°F (19.7°C). For July, the heat index is computed to be a fiery hot 95°F (35°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Greenville, Illinois, with an average temperature ranging between min 65.1°F (18.4°C) and max 82.9°F (28.3°C). Greenville, Illinois, notes an average high-temperature of a still moderately hot 82.9°F (28.3°C) in August, displaying minor variation from July. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Greenville, Illinois, with temperature in the range of an average high of 77.9°F (25.5°C) and an average low of 59.5°F (15.3°C). In September, Greenville's weather conditions record an average high-temperature of a still warm 77.9°F (25.5°C), demonstrating little divergence from the preceding month. Weather in September »
Weather in October
October, like September, in Greenville, Illinois, is another refreshing autumn month, with an average temperature ranging between min 48.7°F (9.3°C) and max 65.3°F (18.5°C). October's onset brings a reduction in the average high-temperature, from a warm 77.9°F (25.5°C) in September to a refreshing 65.3°F (18.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Greenville, Illinois, with an average temperature varying between 51.8°F (11°C) and 37.2°F (2.9°C). The start of November signals a decrease in the average high-temperature, transitioning from a refreshing 65.3°F (18.5°C) in October to a fresh 51.8°F (11°C). Weather in November »
Weather in December
December, the first month of the winter in Greenville, is also a wintry month, with an average temperature ranging between min 29.8°F (-1.2°C) and max 41.5°F (5.3°C). December comes with a decrease in the average high-temperature, falling from a cool 51.8°F (11°C) in November to an icy 41.5°F (5.3°C). Weather in December »
Updated: Jul 25, 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, marked by an average high-temperature of 36.1°F (2.3°C) and a low-temperature of 23.4°F (-4.8°C), is the coldest month.
How many days does it rain?
In Greenville, during the entire year, the rain falls for 137.9 days and collects up to 24.88" (632mm) of precipitation.
When does it snow?
January through March, November and December are months with snowfall.
How much does it snow?
In Greenville, during the entire year, snow falls for 18.3 days and aggregates up to 6.22" (158mm) of snow.
What is the month with the least sunshine?
The months with the least sunshine are January and February, with an average of 4.5h of sunshine.
What are the months with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 7.3 days and typically collects 1.26" (32mm) of precipitation.
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 Greenville, snow does not fall in April through October.
What is the wettest month?
The month with the most rainfall in Greenville is June, when the rain falls for 14.9 days and typically aggregates up to 3.43" (87mm) 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?
With an average of 10.4h of sunshine, June has the most sunshine of the year.
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 in Greenville?
July, with its high-temperature average of 84.4°F (29.1°C) and a low-temperature average of 67.5°F (19.7°C), is the warmest month.
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?
With an average relative humidity of 71%, October is the least humid month.
What is the snowiest month?
December is the month with the most snowfall. Snow falls for 4.1 days and accumulates 1.89" (48mm) of snow.
What is the month with the shortest days?
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Greenville, IL
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (36.1°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 (23.4°F).
Average pressure
Greenville, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Greenville, IL
- Average wind speed in January:
10mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.7mph - Average wind speed in April:
9.6mph - Average wind speed in May:
7.9mph - Average wind speed in June:
6.9mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.9mph - Average wind speed in September:
6.4mph - Average wind speed in October:
8.5mph - Average wind speed in November:
9.1mph - Average wind speed in December:
9.2mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity
Greenville, IL
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Greenville, IL
- Average rainfall in January:
1.5" - Average rainfall in February:
1.26" - Average rainfall in March:
1.89" - Average rainfall in April:
2.72" - Average rainfall in May:
2.83" - Average rainfall in June:
3.43"
The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days
Greenville, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
7.3 days - Average rainfall days in March:
12.7 days - Average rainfall days in April:
14.3 days - Average rainfall days in May:
17.2 days - Average rainfall days in June:
14.9 days
- Average rainfall days in July:
15.3 days - Average rainfall days in August:
12.2 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
9.2 days - Average rainfall days in December:
7.2 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (6.3 days).
Average snowfall
Greenville, IL
The month with the highest snowfall is December (1.89").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Greenville, IL
- Average snowfall days in January:
5.8 days - Average snowfall days in February:
5.3 days - Average snowfall days in March:
2 days - Average snowfall days in April:
0.2 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:
0.8 days - Average snowfall days in December:
4.1 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Greenville, 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 1min - 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 1min - 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 3min - 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 1min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).
Average sunshine days
Greenville, IL
- Average sunshine days in January:
19.7 days - Average sunshine days in February:
16.1 days - Average sunshine days in March:
15.8 days - Average sunshine days in April:
14.1 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
12.7 days
- Average sunshine days in July:
13.3 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
19.3 days - Average sunshine days in November:
19.2 days - Average sunshine days in December:
20 days
The month with the most sunshine days is December (20 days).
The month with the least sunshine days is May (11.8 days).
Average UV index
Greenville, 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
Greenville, 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 29).
Average visibility
Greenville, 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).
Greenville, Illinois, USA
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