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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, like December, in Oconee, Illinois, is another cold winter month, with an average temperature fluctuating between 34.3°F (1.3°C) and 22.1°F (-5.5°C). January is the month when Oconee sees the lowest average temperatures, with a high of 34.3°F (1.3°C) and a low of 22.1°F (-5.5°C). Weather in January »
Weather in February
The last month of the winter, February, is also an icy month in Oconee, Illinois, with an average temperature fluctuating between 39.2°F (4°C) and 25.9°F (-3.4°C). The onset of February brings an average high-temperature of a still wintry 39.2°F (4°C), nearly matching the January temperature. Weather in February »
Weather in March
March, the first month of the spring in Oconee, is a fresh month, with an average temperature varying between 36.1°F (2.3°C) and 51.4°F (10.8°C). As February transitions into March, a change in temperatures is observed, with average highs moving from an icy 39.2°F (4°C) to a fresh 51.4°F (10.8°C). Weather in March »
Weather in April
April in Oconee, Illinois, is a comfortable spring month, with an average temperature ranging between max 63.1°F (17.3°C) and min 46.6°F (8.1°C). The start of April signals an increase in the average high-temperature, moving from a cool 51.4°F (10.8°C) in March to an enjoyable 63.1°F (17.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Oconee, Illinois, with temperature in the range of an average high of 73°F (22.8°C) and an average low of 57°F (13.9°C). A rise in the average high-temperature is observed during May, moving from an enjoyable 63.1°F (17.3°C) in April to a pleasant 73°F (22.8°C). Weather in May »
Weather in June
June, the first month of the summer in Oconee, is a moderately hot month, with an average temperature varying between 81.1°F (27.3°C) and 64.9°F (18.3°C). In Oconee, the average high-temperature in June slightly increases from an agreeable 73°F (22.8°C) in May to a moderately hot 81.1°F (27.3°C). Weather in June »
Weather in July
July, like June, in Oconee, Illinois, is a moderately hot summer month, 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). July, marked by an average high-temperature of 83.1°F (28.4°C) and a low-temperature of 66.6°F (19.2°C), is the warmest month. For July, the heat index is evaluated at a tropical 93.2°F (34°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Oconee, Illinois, with an average temperature varying between 81.9°F (27.7°C) and 64.9°F (18.3°C). August experiences an average high-temperature of a still warm 81.9°F (27.7°C), barely different from July's 83.1°F (28.4°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Oconee, Illinois, with an average temperature varying between 77.4°F (25.2°C) and 58.8°F (14.9°C). September is marked by an average high-temperature of a still moderately hot 77.4°F (25.2°C), almost identical to the preceding month. Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Oconee, Illinois, with an average temperature ranging between min 48.2°F (9°C) and max 64.2°F (17.9°C). As September transitions to October, the average high-temperature falls from a warm 77.4°F (25.2°C) to an enjoyable 64.2°F (17.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Oconee, Illinois, with an average temperature ranging between min 36.5°F (2.5°C) and max 50.7°F (10.4°C). November's arrival comes with a decrease in the average high-temperature, moving from an enjoyable 64.2°F (17.9°C) in October to a fresh 50.7°F (10.4°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Oconee, Illinois, with an average temperature fluctuating between 28.4°F (-2°C) and 39.6°F (4.2°C). December brings a drop in Oconee's average high-temperature, falling from a fresh 50.7°F (10.4°C) in November to an icy 39.6°F (4.2°C). Weather in December »
Updated: Jun 20, 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 part of the year is the coldest?
In Oconee, January records the average lowest temperatures, peaking at 34.3°F (1.3°C) and reaching a low of 22.1°F (-5.5°C).
How much does it rain?
In Oconee, during the entire year, the rain falls for 129.9 days and collects up to 17.6" (447mm) of precipitation.
When does it snow?
Months with snowfall are January through April, November and December.
How many days does it snow?
In Oconee, during the entire year, snow falls for 21.4 days and aggregates up to 5.2" (132mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.2h of sunshine.
When is 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?
February and December are months with the least rain in Oconee when the rain falls for 6.7 days and typically aggregates up to 0.98" (25mm) of rain.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 6.3 days and accumulates 1.93" (49mm) 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 Oconee, snow does not fall in May through October.
What is the rainiest month?
June is the month with the most rainfall. Rain falls for 13.5 days and accumulates 2.2" (56mm) of precipitation.
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?
June has the most sunshine of the year, with an average of 10.4h of sunshine.
What are the months with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What month is the hottest?
The month of July sees the average highest temperatures, reaching 83.1°F (28.4°C) at the peak and 66.6°F (19.2°C) at the low.
What is the most humid month?
The most humid month is July, with an average relative humidity of 83%.
What is the least humid month in Oconee?
The least humid month is October, with an average relative humidity of 70%.
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
Oconee, IL
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (34.3°F).
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure
Oconee, IL
- Average pressure in January:
30.15"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:
30.12"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
Oconee, IL
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.5mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
6.2mph - Average wind speed in September:
6.9mph - Average wind speed in October:
9mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity
Oconee, IL
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Oconee, IL
- Average rainfall in January:
1.14" - Average rainfall in February:
0.98" - Average rainfall in March:
1.38" - Average rainfall in April:
2.13" - Average rainfall in May:
1.93" - Average rainfall in June:
2.2"
- Average rainfall in July:
1.77" - Average rainfall in August:
1.61" - Average rainfall in September:
1.06" - Average rainfall in October:
1.38" - Average rainfall in November:
1.02" - Average rainfall in December:
0.98"
The wettest month (with the highest rainfall) is June (2.2").
The driest months (with the least rainfall) are February and December (0.98").
Average rainfall days
Oconee, IL
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
6.7 days - Average rainfall days in March:
11.5 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
15.2 days - Average rainfall days in June:
13.5 days
- Average rainfall days in July:
14.2 days - Average rainfall days in August:
12.6 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
9.3 days - Average rainfall days in November:
8.2 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (5.9 days).
Average snowfall
Oconee, IL
The month with the highest snowfall is February (1.93").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Oconee, IL
- Average snowfall days in January:
6.3 days - Average snowfall days in February:
6.3 days - Average snowfall days in March:
2.7 days - Average snowfall days in April:
0.3 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:
1.4 days - Average snowfall days in December:
4.3 days
The months with the highest number of snowfall days are January and February (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Oconee, IL
- Average daylight in January:
9h and 5min - 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 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 1min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - 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 1min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Oconee, IL
- Average sunshine days in January:
20.2 days - Average sunshine days in February:
16 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
14.2 days - Average sunshine days in May:
13.1 days - Average sunshine days in June:
13.3 days
- Average sunshine days in July:
13.9 days - Average sunshine days in August:
15.4 days - Average sunshine days in September:
17.2 days - Average sunshine days in October:
19.8 days - Average sunshine days in November:
20.1 days - Average sunshine days in December:
19.7 days
The month with the most sunshine days is January (20.2 days).
The month with the least sunshine days is May (13.1 days).
Average UV index
Oconee, 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
Oconee, IL
The months with the most cloud cover are January and February (Cloud cover 54).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility
Oconee, IL
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Oconee, Illinois, USA
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