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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 Port Byron, Illinois, with an average temperature fluctuating between 28.2°F (-2.1°C) and 15.4°F (-9.2°C). Port Byron records the coldest temperatures in January, averaging a high of 28.2°F (-2.1°C) and a low of 15.4°F (-9.2°C). Weather in January »
Weather in February
The last month of the winter, February, is a cold month in Port Byron, Illinois, with an average temperature fluctuating between 19.6°F (-6.9°C) and 32.7°F (0.4°C). The arrival of February is marked by an average high-temperature of a wintry 32.7°F (0.4°C), bearing a close resemblance to January. Weather in February »
Weather in March
March, the first month of the spring in Port Byron, is a frosty month, with an average temperature varying between 46.8°F (8.2°C) and 32°F (0°C). With the onset of March, Port Byron's average high-temperature experiences a rise, moving from February's wintry 32.7°F (0.4°C) to a frosty 46.8°F (8.2°C). Weather in March »
Weather in April
April in Port Byron, Illinois, is a moderate spring month, with an average temperature fluctuating between 59°F (15°C) and 42.4°F (5.8°C). April's arrival coincides with a rise in the average high-temperature, moving from March's frosty 46.8°F (8.2°C) to a refreshing 59°F (15°C). Weather in April »
Weather in May
May, the last month of the spring in Port Byron, is an agreeable month, with an average temperature ranging between max 70.3°F (21.3°C) and min 53.4°F (11.9°C). With the onset of May, Port Byron's average high-temperature experiences a rise, moving from April's moderate 59°F (15°C) to an agreeable 70.3°F (21.3°C). Weather in May »
Weather in June
June, the first month of the summer in Port Byron, is a warm month, with an average temperature ranging between min 61.9°F (16.6°C) and max 79°F (26.1°C). Port Byron's transition into June sees a mild rise in the average high-temperature, edging from an agreeable 70.3°F (21.3°C) in May to a warm 79°F (26.1°C). Weather in June »
Weather in July
July, like June, in Port Byron, Illinois, is another warm summer month, with an average temperature varying between 64.8°F (18.2°C) and 81.7°F (27.6°C). In Port Byron, temperatures reach their average annual highs in July, measuring 81.7°F (27.6°C) and a minimum average of 64.8°F (18.2°C). The heat index in July is appraised at a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Port Byron, is also a moderately hot month, with an average temperature fluctuating between 80.6°F (27°C) and 62.4°F (16.9°C). In August, Port Byron's weather conditions record an average high-temperature of a still warm 80.6°F (27°C), demonstrating little divergence from the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Port Byron, is also a moderately hot month, with an average temperature fluctuating between 56.3°F (13.5°C) and 75.4°F (24.1°C). September denotes a minimal variation in the average high-temperature to a still moderately hot 75.4°F (24.1°C) from August's 80.6°F (27°C). Weather in September »
Weather in October
October, like September, in Port Byron, Illinois, is another comfortable autumn month, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 45°F (7.2°C). The arrival of October corresponds with a reduction in the average high-temperature, down from September's moderately hot 75.4°F (24.1°C) to an enjoyable 61.3°F (16.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Port Byron, Illinois, with temperature in the range of an average high of 46.9°F (8.3°C) and an average low of 33.3°F (0.7°C). Port Byron's November weather is marked by a distinct drop in high-temperatures, declining from a refreshing 61.3°F (16.3°C) in October to a chilly 46.9°F (8.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Port Byron, Illinois, with an average temperature varying between 23.9°F (-4.5°C) and 34.5°F (1.4°C). December ushers in a slight temperature change, with average high-temperatures reducing from November's chilly 46.9°F (8.3°C) to a wintry 34.5°F (1.4°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Port Byron?
Port Byron's coldest temperatures are experienced in January, with average high temperatures of 28.2°F (-2.1°C) and lows of 15.4°F (-9.2°C).
What are the most humid months in Port Byron?
The months with the highest humidity in Port Byron, Illinois, are January and July, with an average relative humidity of 83%.
How much does it rain in Port Byron?
In Port Byron, during the entire year, the rain falls for 99.4 days and collects up to 9.57" (243mm) of precipitation.
When does it snow in Port Byron?
January through April, September through December are months with snowfall in Port Byron.
When does it snow the most in Port Byron?
January is the month with the most snowfall in Port Byron, Illinois. Snow falls for 7.2 days and accumulates 1.26" (32mm) of snow.
How much does it snow in Port Byron?
Throughout the year, in Port Byron, Illinois, there are 24.5 snowfall days, and 4.09" (104mm) of snow is accumulated.
What is the month with the least sunshine in Port Byron?
With an average of 3.9h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Port Byron?
With an average maximum UV index of 1, January is the month with the lowest UV index in Port Byron, Illinois.
When is Daylight Saving Time (DST) in Port Byron?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Port Byron, Illinois, 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 rainiest month in Port Byron?
The month with the most rainfall in Port Byron is May, when the rain falls for 13.4 days and typically aggregates up to 1.61" (41mm) of precipitation.
When it does not snow in Port Byron?
May through August are months without snowfall.
When are the longest days in Port Byron?
June has the longest days of the year in Port Byron, Illinois, with an average of 15h and 6min of daylight.
What time of the year is the hottest in Port Byron?
Temperature records in Port Byron mark July as the warmest month, with highs averaging 81.7°F (27.6°C) and lows at 64.8°F (18.2°C).
What month has the most sunshine in Port Byron?
The month with the most sunshine is July, with an average of 10.1h of sunshine.
When is the highest UV index in Port Byron?
July is the month with the highest UV index in Port Byron, with an average maximum UV index of 6.
What is the least humid month in Port Byron?
With an average relative humidity of 71%, October is the least humid month in Port Byron, Illinois.
What is the driest month in Port Byron?
The month with the least rainfall is December, when the rain falls for 4.1 days and typically collects 0.35" (9mm) of precipitation.
What is the month with the shortest days in Port Byron?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Port Byron, IL
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure
Port Byron, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.95"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:
30.02"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Port Byron, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.6mph - Average wind speed in May:
9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.7mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity
Port Byron, IL
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Port Byron, IL
- Average rainfall in January:
0.43" - Average rainfall in February:
0.39" - Average rainfall in March:
0.63" - Average rainfall in April:
1.02" - Average rainfall in May:
1.61" - Average rainfall in June:
1.26"
- Average rainfall in July:
1.18" - Average rainfall in August:
0.71" - Average rainfall in September:
0.75" - Average rainfall in October:
0.71" - Average rainfall in November:
0.51" - Average rainfall in December:
0.35"
The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is December (0.35").
Average rainfall days
Port Byron, IL
- Average rainfall days in January:
3.2 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
8.2 days - Average rainfall days in April:
11.8 days - Average rainfall days in May:
13.4 days - Average rainfall days in June:
13.1 days
- Average rainfall days in July:
11.2 days - Average rainfall days in August:
10.7 days - Average rainfall days in September:
6.9 days - Average rainfall days in October:
8.4 days - Average rainfall days in November:
5.1 days - Average rainfall days in December:
4.1 days
The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is January (3.2 days).
Average snowfall
Port Byron, IL
The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days
Port Byron, IL
- Average snowfall days in January:
7.2 days - Average snowfall days in February:
6.2 days - Average snowfall days in March:
3.1 days - Average snowfall days in April:
0.8 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:
0.1 days - Average snowfall days in October:
0.6 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
5 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 and August (0 days).
Average daylight / Average sunshine
Port Byron, IL
- Average daylight in January:
9h and 4min - 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 3min - 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 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- 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:
5h and 3min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Port Byron, IL
- Average sunshine days in January:
22.2 days - Average sunshine days in February:
19.5 days - Average sunshine days in March:
19.8 days - Average sunshine days in April:
16.7 days - Average sunshine days in May:
14.6 days - Average sunshine days in June:
14.4 days
- Average sunshine days in July:
16.2 days - Average sunshine days in August:
17.4 days - Average sunshine days in September:
20.9 days - Average sunshine days in October:
21.3 days - Average sunshine days in November:
22.1 days - Average sunshine days in December:
22.4 days
The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (14.4 days).
Average UV index
Port Byron, IL
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Port Byron, IL
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Port Byron, 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).
Port Byron, Illinois, USA
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