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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 Grayville, Illinois, with an average temperature ranging between min 25.7°F (-3.5°C) and max 38.1°F (3.4°C). Grayville's coldest month, January, generally records average temperatures ranging from a high of 38.1°F (3.4°C) to a low of 25.7°F (-3.5°C). Weather in January »
Weather in February
The last month of the winter, February, is a frosty month in Grayville, Illinois, with an average temperature fluctuating between 43.2°F (6.2°C) and 29.5°F (-1.4°C). February's arrival shows an average high-temperature of a frosty 43.2°F (6.2°C), hardly different from the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Grayville, Illinois, with an average temperature ranging between min 38.8°F (3.8°C) and max 54.1°F (12.3°C). March's onset is marked by a temperature increase, moving from a frosty 43.2°F (6.2°C) in February to a fresh 54.1°F (12.3°C). Weather in March »
Weather in April
April is a refreshing spring month in Grayville, Illinois, with temperature in the range of an average high of 65.3°F (18.5°C) and an average low of 48.7°F (9.3°C). Grayville's April weather brings a rise in high-temperatures, moving from a cool 54.1°F (12.3°C) in March to a refreshing 65.3°F (18.5°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Grayville, Illinois, with an average temperature fluctuating between 58.3°F (14.6°C) and 74.7°F (23.7°C). May sees a temperature increase, moving from an enjoyable 65.3°F (18.5°C) in April to a warm 74.7°F (23.7°C). Weather in May »
Weather in June
The first month of the summer, June, is also a moderately hot month in Grayville, Illinois, with temperature in the range of an average high of 83.1°F (28.4°C) and an average low of 66.6°F (19.2°C). June's arrival brings a modest temperature shift, moving from a warm 74.7°F (23.7°C) in May to a still moderately hot 83.1°F (28.4°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Grayville, Illinois, with an average temperature ranging between min 68°F (20°C) and max 85.5°F (29.7°C). July is the warmest month, with an average high-temperature of 85.5°F (29.7°C) and an average low-temperature of 68°F (20°C). July's average heat index is evaluated at a sweltering 98.6°F (37°C). Weather in July »
Weather in August
August, the last month of the summer in Grayville, is also a moderately hot month, with an average temperature varying between 84°F (28.9°C) and 65.8°F (18.8°C). The transition into August reveals an average high-temperature of a still warm 84°F (28.9°C), mirroring a close resemblance to July. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Grayville, Illinois, with temperature in the range of an average high of 79.2°F (26.2°C) and an average low of 60.8°F (16°C). Grayville experiences a transition to a still warm 79.2°F (26.2°C) in average high-temperatures with the arrival of September, not greatly differing from August's 84°F (28.9°C). Weather in September »
Weather in October
October, like September, in Grayville, Illinois, is another enjoyable autumn month, with an average temperature varying between 67.1°F (19.5°C) and 49.6°F (9.8°C). October is characterized by a reduction in the average high-temperature, from a warm 79.2°F (26.2°C) in September to a comfortable 67.1°F (19.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Grayville, is also a fresh month, with an average temperature fluctuating between 53.1°F (11.7°C) and 38.3°F (3.5°C). The onset of November entails a temperature shift, as the average high-temperature decreases from an enjoyable 67.1°F (19.5°C) in October to a cool 53.1°F (11.7°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Grayville, Illinois, with temperature in the range of an average high of 43.5°F (6.4°C) and an average low of 31.5°F (-0.3°C). December's arrival comes with a decrease in the average high-temperature, moving from a cool 53.1°F (11.7°C) in November to a frosty 43.5°F (6.4°C). Weather in December »
Updated: Feb 12, 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 in Grayville?
January is the coldest month of the year, registering average temperatures as high as 38.1°F (3.4°C) and as low as 25.7°F (-3.5°C).
How many days does it rain in Grayville?
Throughout the year, there are 167.7 rainfall days, and 38.23" (971mm) of precipitation is accumulated.
When does it snow in Grayville?
Months with snowfall in Grayville, Illinois, are January through April, November and December.
How much does it snow in Grayville?
In Grayville, during the entire year, snow falls for 20.5 days and aggregates up to 6.06" (154mm) of snow.
What is the month with the least sunshine in Grayville?
January has the least sunshine of the year in Grayville, with an average of 4.3h of sunshine.
When is the lowest UV index in Grayville?
The months with the lowest UV index in Grayville are January, February, November and December, with an average maximum UV index of 2.
When does it snow the most in Grayville?
February is the month with the most snowfall. Snow falls for 5.4 days and accumulates 1.54" (39mm) of snow.
When is Daylight Saving Time (DST) in Grayville?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Grayville, 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 Grayville?
The month with the most rainfall is April, when the rain falls for 16.7 days and typically aggregates up to 5.2" (132mm) of precipitation.
When it does not snow in Grayville?
May through October are months without snowfall in Grayville.
What is the month with the highest UV index in Grayville?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days in Grayville?
June has the longest days of the year in Grayville, with an average of 14h and 48min of daylight.
What month has the most sunshine in Grayville?
With an average of 10.5h of sunshine, June has the most sunshine of the year in Grayville, Illinois.
What is the warmest month in Grayville?
Temperature records mark July as the warmest month, with highs averaging 85.5°F (29.7°C) and lows at 68°F (20°C).
What is the most humid month in Grayville?
With an average relative humidity of 80%, July is the most humid month in Grayville.
What is the driest month in Grayville?
The month with the least rainfall is September, when the rain falls for 12.6 days and typically collects 1.97" (50mm) of precipitation.
What is the least humid month in Grayville?
With an average relative humidity of 69%, October is the least humid month in Grayville, Illinois.
What is the month with the shortest days in Grayville?
December has the shortest days of the year in Grayville, with an average of 9h and 36min of daylight.
Average temperature
Grayville, IL
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (38.1°F).
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure
Grayville, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Grayville, IL
- Average wind speed in January:
10.1mph - Average wind speed in February:
10.1mph - Average wind speed in March:
10mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.4mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
5.9mph - Average wind speed in August:
6mph - Average wind speed in September:
6.8mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.2mph - Average wind speed in December:
9.4mph
The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity
Grayville, IL
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (69%).
Average rainfall
Grayville, IL
- Average rainfall in January:
2.56" - Average rainfall in February:
2.68" - Average rainfall in March:
3.31" - Average rainfall in April:
5.2" - Average rainfall in May:
4.06" - Average rainfall in June:
4.09"
- Average rainfall in July:
3.23" - Average rainfall in August:
2.68" - Average rainfall in September:
1.97" - Average rainfall in October:
2.76" - Average rainfall in November:
2.68" - Average rainfall in December:
3.03"
The wettest month (with the highest rainfall) is April (5.2").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days
Grayville, IL
- Average rainfall days in January:
9.8 days - Average rainfall days in February:
10.8 days - Average rainfall days in March:
15.5 days - Average rainfall days in April:
16.7 days - Average rainfall days in May:
19.6 days - Average rainfall days in June:
16.8 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
15.5 days - Average rainfall days in September:
12.6 days - Average rainfall days in October:
11.1 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
11 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is January (9.8 days).
Average snowfall
Grayville, IL
The month with the highest snowfall is February (1.54").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Grayville, IL
- Average snowfall days in January:
6.6 days - Average snowfall days in February:
5.4 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.4 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:
1.1 days - Average snowfall days in December:
4.5 days
The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Grayville, 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 3min - 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 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 3min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 3min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 4min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Grayville, IL
- Average sunshine days in January:
15.1 days - Average sunshine days in February:
12 days - Average sunshine days in March:
12.4 days - Average sunshine days in April:
11.4 days - Average sunshine days in May:
8.8 days - Average sunshine days in June:
10.2 days
- Average sunshine days in July:
10.5 days - Average sunshine days in August:
12.5 days - Average sunshine days in September:
15 days - Average sunshine days in October:
18.2 days - Average sunshine days in November:
17.2 days - Average sunshine days in December:
16.3 days
The month with the most sunshine days is October (18.2 days).
The month with the least sunshine days is May (8.8 days).
Average UV index
Grayville, 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
Grayville, IL
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility
Grayville, 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).
Grayville, Illinois, USA
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