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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, in Oregon, Illinois, is another subzero cold winter month, with an average temperature fluctuating between 26.8°F (-2.9°C) and 14.2°F (-9.9°C). Temperature records mark January as the coldest month, with highs averaging 26.8°F (-2.9°C) and lows at 14.2°F (-9.9°C). Weather in January »
Weather in February
February, the last month of the winter in Oregon, is also a subzero cold month, with temperature in the range of an average high of 30.6°F (-0.8°C) and an average low of 17.6°F (-8°C). Oregon, Illinois, experiences an average high-temperature of a still subzero cold 30.6°F (-0.8°C) in February, subtly different from January's 26.8°F (-2.9°C). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Oregon, Illinois, with temperature in the range of an average low of 30°F (-1.1°C) and an average high of 44.4°F (6.9°C). As Oregon transitions into March, a rise in the average high-temperature is observed, moving from a freezing cold 30.6°F (-0.8°C) in February to a frosty 44.4°F (6.9°C). Weather in March »
Weather in April
April in Oregon, Illinois, is a moderate spring month, with an average temperature varying between 40.3°F (4.6°C) and 56.7°F (13.7°C). Oregon sees a rise in temperature during April, with average high-temperatures transitioning from a chilly 44.4°F (6.9°C) in March to a mild 56.7°F (13.7°C). Weather in April »
Weather in May
May, the last month of the spring in Oregon, is a pleasant month, with an average temperature ranging between min 52°F (11.1°C) and max 68.7°F (20.4°C). As April transitions into May, Oregon sees a rise in the average high-temperature, moving from a refreshing 56.7°F (13.7°C) to an agreeable 68.7°F (20.4°C). Weather in May »
Weather in June
June, the first month of the summer in Oregon, is a warm month, with an average temperature ranging between min 60.4°F (15.8°C) and max 77.5°F (25.3°C). As Oregon transitions into June, a marginal rise in the average high-temperature is observed, moving from a pleasant 68.7°F (20.4°C) in May to a warm 77.5°F (25.3°C). Weather in June »
Weather in July
July, like June, in Oregon, Illinois, is another warm summer month, with temperature in the range of an average low of 63°F (17.2°C) and an average high of 79.9°F (26.6°C). With its high average temperature of 79.9°F (26.6°C) and a low of 63°F (17.2°C), July is regarded as the warmest month. Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Oregon, Illinois, with an average temperature fluctuating between 61°F (16.1°C) and 78.3°F (25.7°C). August's commencement is accompanied by an average high-temperature of a still moderately hot 78.3°F (25.7°C), diverging marginally from July's 79.9°F (26.6°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Oregon, Illinois, with an average temperature fluctuating between 54.5°F (12.5°C) and 73°F (22.8°C). Oregon's entry into September measures an average high-temperature of a pleasant 73°F (22.8°C), closely parallel to the preceding month. Weather in September »
Weather in October
October, like September, is a moderate autumn month in Oregon, Illinois, with an average temperature varying between 59.9°F (15.5°C) and 43.7°F (6.5°C). The start of October signals a decrease in the average high-temperature, transitioning from a pleasant 73°F (22.8°C) in September to a mild 59.9°F (15.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Oregon, Illinois, with an average temperature ranging between max 45.1°F (7.3°C) and min 32°F (0°C). Oregon experiences a clear temperature downturn in November, with average high-temperatures moving from a mild 59.9°F (15.5°C) in October to a frosty 45.1°F (7.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Oregon, Illinois, with an average temperature varying between 22.5°F (-5.3°C) and 32.7°F (0.4°C). The onset of December coincides with a reduction in the average high-temperature, falling from a chilly 45.1°F (7.3°C) in November to a wintry 32.7°F (0.4°C). Weather in December »
Updated: Jul 24, 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 time of year?
In Oregon, January registers the lowest temperatures, averaging 26.8°F (-2.9°C) at the peak and 14.2°F (-9.9°C) at the lowest.
What is the most humid month?
With an average relative humidity of 86%, January is the most humid month.
What is the driest month?
January and February are months with the least rain when the rain falls for 5.4 days and typically aggregates up to 0.94" (24mm) of rain.
How much does it rain?
Throughout the year, there are 141.2 rainfall days, and 20.31" (516mm) of precipitation is accumulated.
When does it snow in Oregon?
Months with snowfall are January through April, October through December.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 12.2 days and typically aggregates up to 2.48" (63mm) of snow.
How many days does it snow?
Throughout the year, there are 44.6 snowfall days, and 9.49" (241mm) of snow is accumulated.
What is the month with the least sunshine in Oregon?
With an average of 3.6h of sunshine, January has the least sunshine of the year.
When is the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
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 Oregon?
In Oregon, snow does not fall in May through September.
When is the highest UV index?
May through August, with an average maximum UV index of 5, are months with the highest UV index.
What is the wettest month?
June is the month with the most rainfall. Rain falls for 17 days and accumulates 2.91" (74mm) of precipitation.
When are the longest days?
With an average of 15h and 12min of daylight, June has the longest days of the year.
What time of the year is the hottest?
July, on average, is the warmest month, registering a high temperature of 79.9°F (26.6°C) and a low of 63°F (17.2°C).
What month has the most sunshine in Oregon?
The month with the most sunshine is July, with an average of 9.5h of sunshine.
What is the least humid month?
October is the least humid month, with an average relative humidity of 74%.
What is the month with the shortest days?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Oregon, IL
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (26.8°F).
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).
Average pressure
Oregon, IL
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Oregon, IL
- Average wind speed in January:
9.9mph - Average wind speed in February:
10mph - Average wind speed in March:
9.8mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.5mph - Average wind speed in October:
9mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Oregon, IL
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Oregon, IL
- Average rainfall in January:
0.94" - Average rainfall in February:
0.94" - Average rainfall in March:
1.1" - Average rainfall in April:
2.2" - Average rainfall in May:
2.76" - Average rainfall in June:
2.91"
- Average rainfall in July:
2.24" - Average rainfall in August:
1.93" - Average rainfall in September:
1.54" - Average rainfall in October:
1.77" - Average rainfall in November:
0.98" - Average rainfall in December:
0.98"
The wettest month (with the highest rainfall) is June (2.91").
The driest months (with the least rainfall) are January and February (0.94").
Average rainfall days
Oregon, IL
- Average rainfall days in January:
5.4 days - Average rainfall days in February:
4.6 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
15.3 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
17 days
- Average rainfall days in July:
16 days - Average rainfall days in August:
15.2 days - Average rainfall days in September:
10.6 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
8.7 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (4.6 days).
Average snowfall
Oregon, IL
The month with the highest snowfall is January (2.48").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Oregon, IL
- Average snowfall days in January:
12.2 days - Average snowfall days in February:
10.3 days - Average snowfall days in March:
5.5 days - Average snowfall days in April:
2.3 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:
0.6 days - Average snowfall days in November:
3.9 days - Average snowfall days in December:
9.8 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Oregon, IL
- Average daylight in January:
9h and 3min - 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 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 4min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 2min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
9h and 3min - Average sunshine in August:
9h and 2min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 1min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Oregon, IL
- Average sunshine days in January:
15.3 days - Average sunshine days in February:
13.5 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
11.6 days - Average sunshine days in May:
10.9 days - Average sunshine days in June:
10.4 days
- Average sunshine days in July:
10.8 days - Average sunshine days in August:
12.7 days - Average sunshine days in September:
17 days - Average sunshine days in October:
17.1 days - Average sunshine days in November:
17.6 days - Average sunshine days in December:
15.9 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is June (10.4 days).
Average UV index
Oregon, IL
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Oregon, IL
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility
Oregon, IL
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Oregon, Illinois, USA
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