Climate and monthly weather forecastOreana, IL
Climate and monthly weather forecast
Weather in January
January, like December, in Oreana, Illinois, is an icy winter month, with an average temperature fluctuating between 32.9°F (0.5°C) and 21.2°F (-6°C). Oreana reaches its lowest average temperatures in January, measuring 32.9°F (0.5°C) at the peak and 21.2°F (-6°C) at the lowest. Weather in January »Weather in February
The last month of the winter, February, is also an icy month in Oreana, Illinois, with temperature in the range of an average high of 37.8°F (3.2°C) and an average low of 25.2°F (-3.8°C). February brings an average high-temperature of a still icy 37.8°F (3.2°C), nearly identical to the preceding month. Weather in February »Weather in March
March, the first month of the spring in Oreana, is a cool month, with temperature in the range of an average high of 50.5°F (10.3°C) and an average low of 35.6°F (2°C). Oreana sees a rise in temperature during March, with average high-temperatures transitioning from an icy 37.8°F (3.2°C) in February to a fresh 50.5°F (10.3°C). Weather in March »Weather in April
April is a comfortable spring month in Oreana, Illinois, with temperature in the range of an average low of 46°F (7.8°C) and an average high of 61.9°F (16.6°C). Oreana's weather in April shows a rise in the average high-temperature, moving up from March's fresh 50.5°F (10.3°C) to a comfortable 61.9°F (16.6°C). Weather in April »Weather in May
May, the last month of the spring in Oreana, is an agreeable month, with an average temperature ranging between max 72.9°F (22.7°C) and min 56.7°F (13.7°C). The shift from April to May is marked by an increase in the average high-temperature, moving from an enjoyable 61.9°F (16.6°C) to a pleasant 72.9°F (22.7°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Oreana, Illinois, with an average temperature ranging between max 80.6°F (27°C) and min 64°F (17.8°C). June comes with a subtle rise, with the average high-temperature adjusting from a pleasant 72.9°F (22.7°C) in May to a moderately hot 80.6°F (27°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Oreana, Illinois, with an average temperature varying between 65.7°F (18.7°C) and 82°F (27.8°C). July is the month when Oreana's temperatures reach their peak, with averages of 82°F (27.8°C) and lows of 65.7°F (18.7°C). In July, the average heat index is computed to be a hot 89.6°F (32°C). Weather in July »Weather in August
August, the last month of the summer in Oreana, is also a moderately hot month, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 63.9°F (17.7°C). Oreana's average high-temperature marks a still moderately hot 81.1°F (27.3°C) with the advent of August, closely mirroring that of the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Oreana, Illinois, with an average temperature ranging between min 58.5°F (14.7°C) and max 77°F (25°C). September commences with an average high-temperature of a still moderately hot 77°F (25°C), showing little deviation from August's 81.1°F (27.3°C). Weather in September »Weather in October
October, like September, in Oreana, Illinois, is another comfortable autumn month, with temperature in the range of an average high of 64°F (17.8°C) and an average low of 48°F (8.9°C). Transition from September to October is accompanied by a temperature drop, with average high-temperatures decreasing from a moderately hot 77°F (25°C) to a comfortable 64°F (17.8°C). Weather in October »Weather in November
November, the last month of the autumn in Oreana, is also a frosty month, with an average temperature ranging between max 49.8°F (9.9°C) and min 36.1°F (2.3°C). November brings a minor decrease, with the average high-temperature reducing from a comfortable 64°F (17.8°C) in October to a frosty 49.8°F (9.9°C). Weather in November »Weather in December
The first month of the winter, December, is also a wintry month in Oreana, Illinois, with temperature in the range of an average high of 38.5°F (3.6°C) and an average low of 27.9°F (-2.3°C). A moderate decline in the average high-temperature is seen during December, decreasing from a chilly 49.8°F (9.9°C) in November to a cold 38.5°F (3.6°C). Weather in December »Updated: Jul 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
January, with an average high of 32.9°F (0.5°C) and a low of 21.2°F (-6°C), signifies the coldest month of the year.
In Oreana, during the entire year, the rain falls for 130.2 days and collects up to 16.34" (415mm) of precipitation.
January through April, November and December are months with snowfall.
January is the month with the most snowfall. Snow falls for 7.2 days and accumulates 1.85" (47mm) of snow.
Throughout the year, there are 23.1 snowfall days, and 5.67" (144mm) of snow is accumulated.
January has the least sunshine of the year in Oreana, with an average of 4.1h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February and December are months with the least rain when the rain falls for 5.8 days and typically aggregates up to 0.87" (22mm) of rain.
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.
May is the month with the most rainfall. Rain falls for 17 days and accumulates 2.01" (51mm) of precipitation.
In Oreana, 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.
June has the most sunshine of the year, with an average of 10.4h of sunshine.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
In Oreana, July registers the highest temperatures, averaging 82°F (27.8°C) at the peak and 65.7°F (18.7°C) at the lowest.
With an average relative humidity of 84%, July is the most humid month.
October is the least humid month in Oreana, Illinois, with an average relative humidity of 70%.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Oreana, IL
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.9°F).
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure
Oreana, 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:
30.12"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
Oreana, IL
- Average wind speed in January:
10.7mph - Average wind speed in February:
10.6mph - 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:
7.5mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.2mph - Average wind speed in October:
9.4mph - Average wind speed in November:
10.1mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity
Oreana, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Oreana, IL
- Average rainfall in January:
1.06" - Average rainfall in February:
0.87" - Average rainfall in March:
1.3" - Average rainfall in April:
1.93" - Average rainfall in May:
2.01" - Average rainfall in June:
1.93"
- Average rainfall in July:
1.54" - Average rainfall in August:
1.5" - Average rainfall in September:
1.18" - Average rainfall in October:
1.22" - Average rainfall in November:
0.94" - Average rainfall in December:
0.87"
The wettest month (with the highest rainfall) is May (2.01").
The driest months (with the least rainfall) are February and December (0.87").
Average rainfall days
Oreana, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
5.8 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
13.6 days - Average rainfall days in May:
17 days - Average rainfall days in June:
13.7 days
- Average rainfall days in July:
14.8 days - Average rainfall days in August:
11.8 days - Average rainfall days in September:
10.6 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
8.4 days - Average rainfall days in December:
7.1 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (5.8 days).
Average snowfall
Oreana, IL
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Oreana, IL
- Average snowfall days in January:
7.2 days - Average snowfall days in February:
5.9 days - Average snowfall days in March:
2.6 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 days - Average snowfall days in November:
1.6 days - Average snowfall days in December:
5.3 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Oreana, 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:
10h and 0min - Average daylight in December:
9h and 24min
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 24min).
- Average sunshine in January:
4h and 6min - Average sunshine in February:
4h and 18min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 12min - Average sunshine in May:
9h and 18min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 12min - Average sunshine in October:
6h and 18min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 36min
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 6min).
Average sunshine days
Oreana, IL
- Average sunshine days in January:
19.5 days - Average sunshine days in February:
16.7 days - Average sunshine days in March:
16.4 days - Average sunshine days in April:
14.5 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
13 days
- Average sunshine days in July:
13.3 days - Average sunshine days in August:
16.6 days - Average sunshine days in September:
17.3 days - Average sunshine days in October:
19.8 days - Average sunshine days in November:
19.6 days - Average sunshine days in December:
19.4 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.5 days).
Average UV index
Oreana, 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
Oreana, IL
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility
Oreana, 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).
