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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 South Roxana, Illinois, with an average temperature fluctuating between 36.1°F (2.3°C) and 23.4°F (-4.8°C). South Roxana records the coldest temperatures in January, averaging a high of 36.1°F (2.3°C) and a low of 23.4°F (-4.8°C). Weather in January »
Weather in February
February, the last month of the winter in South Roxana, is also an icy month, with an average temperature ranging between min 27.1°F (-2.7°C) and max 41°F (5°C). February's presence records an average high-temperature of a still wintry 41°F (5°C), closely mirroring January's climate. Weather in February »
Weather in March
March, the first month of the spring in South Roxana, is a cool month, with an average temperature varying between 37.2°F (2.9°C) and 53.4°F (11.9°C). The start of March signals an increase in the average high-temperature, moving from a cold 41°F (5°C) in February to a fresh 53.4°F (11.9°C). Weather in March »
Weather in April
April in South Roxana, Illinois, is a comfortable spring month, with temperature in the range of an average low of 46.9°F (8.3°C) and an average high of 64.4°F (18°C). South Roxana experiences a temperature shift with the start of April, with average high-temperatures moving from a cool 53.4°F (11.9°C) in March to a refreshing 64.4°F (18°C). Weather in April »
Weather in May
May, the last month of the spring in South Roxana, is a warm month, with an average temperature varying between 74.1°F (23.4°C) and 57°F (13.9°C). May brings an increase in the average high-temperature, progressing from an enjoyable 64.4°F (18°C) in April to a warm 74.1°F (23.4°C). Weather in May »
Weather in June
June, the first month of the summer in South Roxana, is also a moderately hot month, with an average temperature ranging between min 66.2°F (19°C) and max 83.1°F (28.4°C). As May transitions into June, South Roxana sees a rise in the average high-temperature, moving from 74.1°F (23.4°C) to a still warm 83.1°F (28.4°C). Weather in June »
Weather in July
July, like June, in South Roxana, Illinois, is a moderately hot summer month, with an average temperature varying between 67.6°F (19.8°C) and 85.3°F (29.6°C). The warmest temperatures occur during July, when averages reach a peak of 85.3°F (29.6°C) and a low of 67.6°F (19.8°C). In July, the heat index is estimated at a sweltering 96.8°F (36°C). Weather in July »
Weather in August
August, the last month of the summer in South Roxana, is also a moderately hot month, with an average temperature varying between 65.7°F (18.7°C) and 84°F (28.9°C). August's advent presents an average high-temperature of a still moderately hot 84°F (28.9°C), indicating a slight variation from the conditions of the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in South Roxana, Illinois, with an average temperature ranging between max 78.6°F (25.9°C) and min 59.4°F (15.2°C). The shift from August to September coincides with a small decrease in the average high-temperature, down to a still moderately hot 78.6°F (25.9°C) from a warm 84°F (28.9°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in South Roxana, Illinois, with an average temperature varying between 65.3°F (18.5°C) and 48.7°F (9.3°C). South Roxana in October undergoes a mild reduction in the average high-temperature, shifting from September's warm 78.6°F (25.9°C) to a comfortable 65.3°F (18.5°C). Weather in October »
Weather in November
November, the last month of the autumn in South Roxana, is another cool month, with temperature in the range of an average high of 52.2°F (11.2°C) and an average low of 37°F (2.8°C). As October transitions to November, the average high-temperature falls from a comfortable 65.3°F (18.5°C) to a fresh 52.2°F (11.2°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in South Roxana, Illinois, with temperature in the range of an average high of 41.4°F (5.2°C) and an average low of 29.8°F (-1.2°C). A decrease in the average high-temperature is observed during December, shifting from a cool 52.2°F (11.2°C) in November to an icy 41.4°F (5.2°C). Weather in December »
Updated: Aug 22, 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?
January is the coldest month, with an average high-temperature of 36.1°F (2.3°C) and an average low-temperature of 23.4°F (-4.8°C).
How many days does it rain?
In South Roxana, during the entire year, the rain falls for 138 days and collects up to 23.9" (607mm) of precipitation.
When does it snow?
January through April, November and December are months with snowfall.
How many days does it snow?
Throughout the year, there are 18.6 snowfall days, and 4.53" (115mm) of snow is accumulated.
What are the months with the least sunshine?
January and February, with an average of 4.5h of sunshine, are months with the least sunshine.
What are the months with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in South Roxana.
What is the driest month?
February is the month with the least rainfall. Rain falls for 6.9 days and accumulates 1.14" (29mm) of precipitation.
When does it snow the most?
February is the month with the most snowfall in South Roxana. Snow falls for 5.4 days and accumulates 1.61" (41mm) 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.
What is the wettest month?
The month with the most rainfall is May, when the rain falls for 16.6 days and typically aggregates up to 3.07" (78mm) of precipitation.
When it does not snow in South Roxana?
May through October are months without snowfall.
What is the month with the highest UV index in South Roxana?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days?
June has the longest days of the year, with an average of 14h and 48min of daylight.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10.4h of sunshine.
What is the hottest time of year?
In South Roxana, July is identified by the average highest temperatures, reaching a peak of 85.3°F (29.6°C) and a low of 67.6°F (19.8°C).
What is the most humid month?
The most humid month in South Roxana is July, with an average relative humidity of 80%.
What is the least humid month?
October is the least humid month, with an average relative humidity of 71%.
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
South Roxana, IL
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (36.1°F).
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure
South Roxana, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"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:
30.02"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 (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
South Roxana, IL
- Average wind speed in January:
9.6mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.3mph - Average wind speed in May:
7.6mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.8mph - Average wind speed in September:
6.3mph - Average wind speed in October:
8.1mph - Average wind speed in November:
8.9mph - Average wind speed in December:
9mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity
South Roxana, IL
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall
South Roxana, IL
- Average rainfall in January:
1.26" - Average rainfall in February:
1.14" - Average rainfall in March:
1.57" - Average rainfall in April:
2.4" - Average rainfall in May:
3.07" - Average rainfall in June:
2.76"
- Average rainfall in July:
2.48" - Average rainfall in August:
2.91" - Average rainfall in September:
1.69" - Average rainfall in October:
1.93" - Average rainfall in November:
1.3" - Average rainfall in December:
1.38"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days
South Roxana, IL
- Average rainfall days in January:
5.6 days - Average rainfall days in February:
6.9 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
13.4 days - Average rainfall days in May:
16.6 days - Average rainfall days in June:
15.1 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
14.3 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
6.7 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (5.6 days).
Average snowfall
South Roxana, IL
The month with the highest snowfall is February (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
South Roxana, IL
- Average snowfall days in January:
6 days - Average snowfall days in February:
5.4 days - Average snowfall days in March:
2 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 days - Average snowfall days in December:
3.8 days
The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
South Roxana, 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 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 1min - Average daylight in December:
9h and 3min
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 30min).
- Average sunshine in January:
4h and 3min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 3min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).
Average sunshine days
South Roxana, IL
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
16.1 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
15.3 days - Average sunshine days in May:
12.5 days - Average sunshine days in June:
12.5 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
14 days - Average sunshine days in September:
15.7 days - Average sunshine days in October:
19.7 days - Average sunshine days in November:
20.1 days - Average sunshine days in December:
20.4 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is July (12.3 days).
Average UV index
South Roxana, 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
South Roxana, IL
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility
South Roxana, 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).
South Roxana, Illinois, USA
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