Climate and monthly weather forecastGreen Valley, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Green Valley, Illinois, is a freezing cold winter month, with an average temperature ranging between max 31.5°F (-0.3°C) and min 19.8°F (-6.8°C). Green Valley's January weather, marked by an average high temperature of 31.5°F (-0.3°C) and an average low temperature of 19.8°F (-6.8°C), is the coldest in the year. Weather in January »Weather in February
The last month of the winter, February, is a wintry month in Green Valley, Illinois, with an average temperature varying between 23.4°F (-4.8°C) and 36.3°F (2.4°C). The transition from January to February brings an average high-temperature of an icy 36.3°F (2.4°C), barely different from January's 31.5°F (-0.3°C). Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Green Valley, Illinois, with an average temperature fluctuating between 49.6°F (9.8°C) and 34.5°F (1.4°C). In Green Valley, the average high-temperature in March rises, from a wintry 36.3°F (2.4°C) in February, to a frosty 49.6°F (9.8°C). Weather in March »Weather in April
April is an enjoyable spring month in Green Valley, Illinois, with an average temperature fluctuating between 61.5°F (16.4°C) and 44.6°F (7°C). Noticing a change, the average high-temperature during April moves from March's chilly 49.6°F (9.8°C) to an enjoyable 61.5°F (16.4°C). Weather in April »Weather in May
May, the last month of the spring in Green Valley, is a pleasant month, with an average temperature fluctuating between 55.8°F (13.2°C) and 72.1°F (22.3°C). An upsurge in temperatures occurs as April gives way to May, with average highs shifting from an enjoyable 61.5°F (16.4°C) to a pleasant 72.1°F (22.3°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Green Valley, Illinois, with an average temperature ranging between max 80.6°F (27°C) and min 63.9°F (17.7°C). Green Valley's weather shows a minor temperature rise with the arrival of June, moving from a pleasant 72.1°F (22.3°C) in May to a moderately hot 80.6°F (27°C). Weather in June »Weather in July
July, like June, in Green Valley, Illinois, is a moderately hot summer month, with an average temperature ranging between min 65.3°F (18.5°C) and max 82°F (27.8°C). Green Valley's July weather, with an average high temperature of 82°F (27.8°C) and an average low temperature of 65.3°F (18.5°C), tends to be the warmest of the year. The average heat index in July is appraised at a hot 89.6°F (32°C). Weather in July »Weather in August
August, the last month of the summer in Green Valley, is another warm month, with an average temperature varying between 81.1°F (27.3°C) and 63.5°F (17.5°C). With August's arrival, Green Valley's weather records an average high-temperature of a still moderately hot 81.1°F (27.3°C), marking little difference from July's 82°F (27.8°C). Weather in August »Weather in September
September, the first month of the autumn in Green Valley, is also a moderately hot month, with an average temperature varying between 76.5°F (24.7°C) and 57.9°F (14.4°C). September begins with an average high-temperature of a still moderately hot 76.5°F (24.7°C), reflecting close similarity to the preceding month. Weather in September »Weather in October
October, the same as September, is another comfortable autumn month in Green Valley, Illinois, with an average temperature ranging between min 46.9°F (8.3°C) and max 63.1°F (17.3°C). October comes with a drop in the average high-temperature, falling from September's moderately hot 76.5°F (24.7°C) to an enjoyable 63.1°F (17.3°C). Weather in October »Weather in November
November, the last month of the autumn in Green Valley, is also a frosty month, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 48.9°F (9.4°C). Green Valley in November undergoes a mild reduction in the average high-temperature, shifting from October's comfortable 63.1°F (17.3°C) to a frosty 48.9°F (9.4°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Green Valley, Illinois, with an average temperature ranging between min 26.4°F (-3.1°C) and max 36.9°F (2.7°C). Green Valley, Illinois, experiences a temperature shift at the start of December, with average high-temperatures adjusting from a frosty 48.9°F (9.4°C) in November to a wintry 36.9°F (2.7°C). Weather in December »Updated: Aug 28, 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
The month of January sees the average lowest temperatures, reaching 31.5°F (-0.3°C) at the peak and 19.8°F (-6.8°C) at the low.
Throughout the year, there are 131.4 rainfall days, and 20.08" (510mm) of precipitation is accumulated.
Months with snowfall are January through April, November and December.
The month with the most snowfall is January, when snow falls for 8.4 days and typically aggregates up to 2.87" (73mm) of snow.
In Green Valley, during the entire year, snow falls for 25.8 days and aggregates up to 8.66" (220mm) of snow.
The month with the least sunshine is January, with an average of 4h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February is the month with the least rainfall. Rain falls for 5.1 days and accumulates 1.02" (26mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Green Valley, 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.
May is the month with the most rainfall. Rain falls for 17.7 days and accumulates 2.83" (72mm) of precipitation.
In Green Valley, snow does not fall in May through October.
June has the longest days of the year, with an average of 15h and 0min of daylight.
With an average of 10.2h of sunshine, June has the most sunshine of the year.
The months with the highest UV index in Green Valley are June through August, with an average maximum UV index of 6.
Green Valley notes the warmest temperatures in July, with a average high of 82°F (27.8°C) and a low of 65.3°F (18.5°C).
July is the most humid month, with an average relative humidity of 84%.
October is the least humid month, with an average relative humidity of 71%.
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Green Valley, IL
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.5°F).
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure
Green Valley, 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:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"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:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Green Valley, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.6mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.5mph - Average wind speed in October:
9.3mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Green Valley, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Green Valley, IL
- Average rainfall in January:
1.06" - Average rainfall in February:
1.02" - Average rainfall in March:
1.57" - Average rainfall in April:
2.28" - Average rainfall in May:
2.83" - Average rainfall in June:
2.28"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.61" - Average rainfall in September:
1.57" - Average rainfall in October:
1.61" - Average rainfall in November:
1.26" - Average rainfall in December:
1.06"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days
Green Valley, IL
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
15.5 days - Average rainfall days in August:
12.4 days - Average rainfall days in September:
10.3 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
7.9 days - Average rainfall days in December:
6.6 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (5.1 days).
Average snowfall
Green Valley, IL
The month with the highest snowfall is January (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Green Valley, IL
- Average snowfall days in January:
8.4 days - Average snowfall days in February:
6.4 days - Average snowfall days in March:
3.2 days - Average snowfall days in April:
0.5 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:
0.2 days - Average snowfall days in November:
1.7 days - Average snowfall days in December:
5.4 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Green Valley, IL
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
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 0min - Average sunshine in February:
4h and 18min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 6min - Average sunshine in May:
9h and 6min - Average sunshine in June:
10h and 12min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 48min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 48min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 24min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Green Valley, IL
- Average sunshine days in January:
18.3 days - Average sunshine days in February:
17.6 days - Average sunshine days in March:
16.1 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
12 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
18.8 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
20 days - Average sunshine days in December:
19.7 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (11.8 days).
Average UV index
Green Valley, 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
Green Valley, IL
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility
Green Valley, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
