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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, is another subzero cold winter month in Byron, Illinois, with an average temperature ranging between max 26.2°F (-3.2°C) and min 14°F (-10°C). January is the coldest month, with the temperature often reaching an average high of 26.2°F (-3.2°C) and an average low of 14°F (-10°C). Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Byron, Illinois, with an average temperature fluctuating between 17.4°F (-8.1°C) and 30.4°F (-0.9°C). The high-temperature average in February for Byron is a still freezing cold 30.4°F (-0.9°C), staying closely aligned with January's conditions. Weather in February »
Weather in March
March, the first month of the spring in Byron, is a frosty month, with temperature in the range of an average high of 44.2°F (6.8°C) and an average low of 29.8°F (-1.2°C). March signals a shift in the average high-temperature, moving from February's freezing cold 30.4°F (-0.9°C) to a frosty 44.2°F (6.8°C). Weather in March »
Weather in April
April is a mild spring month in Byron, Illinois, with an average temperature varying between 39.7°F (4.3°C) and 56.3°F (13.5°C). April's arrival coincides with a temperature rise, moving from March's chilly 44.2°F (6.8°C) to a refreshing 56.3°F (13.5°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Byron, Illinois, with an average temperature fluctuating between 68.5°F (20.3°C) and 51.3°F (10.7°C). With the onset of May, Byron's weather sees a temperature rise, transitioning from a mild 56.3°F (13.5°C) in April to a pleasant 68.5°F (20.3°C). Weather in May »
Weather in June
June, the first month of the summer in Byron, is a warm month, with an average temperature fluctuating between 77.2°F (25.1°C) and 60.1°F (15.6°C). Byron's weather shows a minor temperature rise with the arrival of June, moving from an agreeable 68.5°F (20.3°C) in May to a moderately hot 77.2°F (25.1°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Byron, Illinois, with an average temperature varying between 79.9°F (26.6°C) and 63.1°F (17.3°C). With an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 63.1°F (17.3°C), July is the warmest month. Weather in July »
Weather in August
August, the last month of the summer in Byron, is also a moderately hot month, with an average temperature fluctuating between 60.6°F (15.9°C) and 78.1°F (25.6°C). Byron experiences a subtle adjustment in high-temperatures to a still warm 78.1°F (25.6°C) with the onset of August, maintaining near parity with July's 79.9°F (26.6°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Byron, Illinois, with an average temperature ranging between min 54.3°F (12.4°C) and max 72.7°F (22.6°C). September is marked by a subtle drop in average high-temperatures, transitioning from a warm 78.1°F (25.6°C) in August to a pleasant 72.7°F (22.6°C). Weather in September »
Weather in October
October, the same as September, in Byron, Illinois, is another refreshing autumn month, with temperature in the range of an average high of 59.5°F (15.3°C) and an average low of 43.7°F (6.5°C). October brings a decrease in the average high-temperature, falling from September's pleasant 72.7°F (22.6°C) to a refreshing 59.5°F (15.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Byron, is also a frosty month, with temperature in the range of an average high of 44.8°F (7.1°C) and an average low of 31.8°F (-0.1°C). Byron's transition into November marks a considerable drop in the average high-temperature, moving down from a moderate 59.5°F (15.3°C) in October to a chilly 44.8°F (7.1°C). Weather in November »
Weather in December
December, the first month of the winter in Byron, is also a wintry month, with an average temperature fluctuating between 32.5°F (0.3°C) and 22.5°F (-5.3°C). The commencement of December involves a temperature shift, with the average high-temperature dropping from a chilly 44.8°F (7.1°C) in November to a cold 32.5°F (0.3°C). Weather in December »
Updated: Jun 21, 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 month is the coldest?
January is the month when Byron sees the average lowest temperatures, with a high of 26.2°F (-3.2°C) and a low of 14°F (-10°C).
What is the most humid month?
January is the most humid month, with an average relative humidity of 86%.
What is the driest month?
January and February are months with the least rain when the rain falls for 3.2 days and typically aggregates up to 0.35" (9mm) of rain.
How much does it rain?
In Byron, during the entire year, the rain falls for 100.6 days and collects up to 7.99" (203mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 8.1 days and typically aggregates up to 1.42" (36mm) of snow.
How many days does it snow?
Throughout the year, there are 29.5 snowfall days, and 3.66" (93mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine in Byron is January, with an average of 3.7h of sunshine.
When is the lowest UV index?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
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 least humid month?
April and October, with an average relative humidity of 75%, are the least humid months.
What is the wettest month?
May is the month with the most rainfall. Rain falls for 13.8 days and accumulates 1.18" (30mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
When are the longest days?
With an average of 15h and 12min of daylight, June has the longest days of the year.
What part of the year is the hottest?
July, having an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 63.1°F (17.3°C), is the warmest month.
What month has the most sunshine in Byron?
With an average of 9.8h of sunshine, July has the most sunshine of the year.
When is the highest UV index?
The month with the highest UV index is July, with an average maximum UV index of 6.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Byron, 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 (26.2°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14°F).
Average pressure
Byron, 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:
29.96"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
Byron, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.7mph - Average wind speed in April:
10.2mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.4mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.7mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity
Byron, IL
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall
Byron, IL
- Average rainfall in January:
0.35" - Average rainfall in February:
0.35" - Average rainfall in March:
0.47" - Average rainfall in April:
0.91" - Average rainfall in May:
1.18" - Average rainfall in June:
1.02"
- Average rainfall in July:
1.02" - Average rainfall in August:
0.59" - Average rainfall in September:
0.63" - Average rainfall in October:
0.67" - Average rainfall in November:
0.39" - Average rainfall in December:
0.39"
The wettest month (with the highest rainfall) is May (1.18").
The driest months (with the least rainfall) are January and February (0.35").
Average rainfall days
Byron, IL
- Average rainfall days in January:
3.2 days - Average rainfall days in February:
3.5 days - Average rainfall days in March:
8.9 days - Average rainfall days in April:
11.1 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
13.5 days
- Average rainfall days in July:
10.8 days - Average rainfall days in August:
10.3 days - Average rainfall days in September:
7.7 days - Average rainfall days in October:
7.7 days - Average rainfall days in November:
5.5 days - Average rainfall days in December:
4.6 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (3.2 days).
Average snowfall
Byron, IL
The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Byron, IL
- Average snowfall days in January:
8.1 days - Average snowfall days in February:
7.2 days - Average snowfall days in March:
4 days - Average snowfall days in April:
1.1 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:
0.4 days - Average snowfall days in November:
2.1 days - Average snowfall days in December:
6.6 days
The month with the highest number of snowfall days is January (8.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Byron, 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 5min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 1min - Average sunshine in December:
3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Byron, IL
- Average sunshine days in January:
21.9 days - Average sunshine days in February:
19.2 days - Average sunshine days in March:
20.3 days - Average sunshine days in April:
16.8 days - Average sunshine days in May:
15.4 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
16.3 days - Average sunshine days in August:
18 days - Average sunshine days in September:
20 days - Average sunshine days in October:
21.7 days - Average sunshine days in November:
22.3 days - Average sunshine days in December:
22.6 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (12.8 days).
Average UV index
Byron, IL
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Byron, IL
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility
Byron, IL
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Byron, Illinois, USA
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