Climate and monthly weather forecastZion, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Zion, Illinois, is another subzero cold winter month, with an average temperature fluctuating between 27.9°F (-2.3°C) and 18.3°F (-7.6°C). January, with its high-temperature average of 27.9°F (-2.3°C) and a low-temperature average of 18.3°F (-7.6°C), is the coldest month. Weather in January »Weather in February
February, the last month of the winter in Zion, is another freezing cold month, with an average temperature varying between 20.7°F (-6.3°C) and 30.6°F (-0.8°C). The transition into February is marked with an average high-temperature of a still subzero cold 30.6°F (-0.8°C), showing an insignificant shift from January's 27.9°F (-2.3°C). Weather in February »Weather in March
The first month of the spring, March, is an icy month in Zion, Illinois, with temperature in the range of an average high of 41.2°F (5.1°C) and an average low of 30.6°F (-0.8°C). The onset of March marks an increase in the average high-temperature, moving from a freezing cold 30.6°F (-0.8°C) in February to an icy 41.2°F (5.1°C). Weather in March »Weather in April
April in Zion, Illinois, is a fresh spring month, with temperature in the range of an average low of 38.8°F (3.8°C) and an average high of 50.7°F (10.4°C). Zion's April weather brings a rise in high-temperatures, moving from a cold 41.2°F (5.1°C) in March to a cool 50.7°F (10.4°C). Weather in April »Weather in May
May, the last month of the spring in Zion, is a refreshing month, with an average temperature ranging between min 48.6°F (9.2°C) and max 61.3°F (16.3°C). Entering May, Zion sees a temperature rise, with the average high-temperature advancing from April's fresh 50.7°F (10.4°C) to an enjoyable 61.3°F (16.3°C). Weather in May »Weather in June
The first month of the summer, June, is a pleasant month in Zion, Illinois, with an average temperature ranging between max 70.5°F (21.4°C) and min 58.6°F (14.8°C). June sees a rise in the average high-temperature, climbing from an enjoyable 61.3°F (16.3°C) in May to an agreeable 70.5°F (21.4°C). Weather in June »Weather in July
July is a moderately hot summer month in Zion, Illinois, with an average temperature fluctuating between 77.5°F (25.3°C) and 65.3°F (18.5°C). July registers as the month with the highest average temperatures, reaching 77.5°F (25.3°C) at its peak and 65.3°F (18.5°C) at the lowest. Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Zion, Illinois, with an average temperature ranging between max 77°F (25°C) and min 64.8°F (18.2°C). The arrival of August sees an average high-temperature of a still moderately hot 77°F (25°C), hardly diverging from July's 77.5°F (25.3°C). Weather in August »Weather in September
The first month of the autumn, September, is also an agreeable month in Zion, Illinois, with an average temperature ranging between max 70.9°F (21.6°C) and min 58.5°F (14.7°C). September is characterized by a mild reduction in the average high-temperature, from a warm 77°F (25°C) in August to an agreeable 70.9°F (21.6°C). Weather in September »Weather in October
October, like September, is another mild autumn month in Zion, Illinois, with an average temperature varying between 46.9°F (8.3°C) and 58.3°F (14.6°C). In October, the average high-temperature decreases from an agreeable 70.9°F (21.6°C) in September to a refreshing 58.3°F (14.6°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Zion, Illinois, with an average temperature varying between 34.7°F (1.5°C) and 45.1°F (7.3°C). A shift in Zion's weather is observed as October turns into November, with the average high temperature reducing from a mild 58.3°F (14.6°C) to a frosty 45.1°F (7.3°C). Weather in November »Weather in December
December, the first month of the winter in Zion, is also an icy month, with an average temperature varying between 34°F (1.1°C) and 25.3°F (-3.7°C). A decrease in the average high-temperature is observed during December, shifting from a frosty 45.1°F (7.3°C) in November to a wintry 34°F (1.1°C). Weather in December »Updated: Feb 12, 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 its average high-temperature of 27.9°F (-2.3°C) and an average low-temperature of 18.3°F (-7.6°C), holds the record as the coldest month in Zion, Illinois.
With an average relative humidity of 83%, January is the most humid month in Zion, Illinois.
In Zion, Illinois, during the entire year, the rain falls for 142.5 days and collects up to 21.5" (546mm) of precipitation.
January through April, October through December are months with snowfall in Zion.
Throughout the year, there are 45.5 snowfall days, and 9.37" (238mm) of snow is accumulated.
With an average of 3.7h of sunshine, January has the least sunshine of the year.
The months with the lowest UV index in Zion, Illinois, are January and December, with an average maximum UV index of 1.
February is the month with the most snowfall in Zion, Illinois. Snow falls for 9.8 days and accumulates 2.6" (66mm) of snow.
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 through September are months without snowfall in Zion, Illinois.
The wettest months are June and August, with an average 2.68" (68mm) of rainfall.
With an average of 15h and 12min of daylight, June has the longest days of the year in Zion, Illinois.
July, with its average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 65.3°F (18.5°C), holds the record as the warmest month.
The months with the most sunshine in Zion, Illinois, are July and August, with an average of 10.5h of sunshine.
The months with the highest UV index in Zion are July and August, with an average maximum UV index of 6.
October and November, with an average relative humidity of 75%, are the least humid months.
December is the month with the least rainfall in Zion. Rain falls for 8.1 days and accumulates 0.91" (23mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 6min of daylight.
Average temperature
Zion, IL
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (27.9°F).
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure
Zion, IL
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"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:
30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Zion, IL
- Average wind speed in January:
11.9mph - Average wind speed in February:
11.6mph - Average wind speed in March:
10.7mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.2mph - Average wind speed in June:
8.1mph
- Average wind speed in July:
7.4mph - Average wind speed in August:
7.3mph - Average wind speed in September:
8.8mph - Average wind speed in October:
10.5mph - Average wind speed in November:
11.3mph - Average wind speed in December:
11.1mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).
Average humidity
Zion, IL
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall
Zion, IL
- Average rainfall in January:
1.06" - Average rainfall in February:
1.06" - Average rainfall in March:
1.1" - Average rainfall in April:
2.44" - Average rainfall in May:
2.48" - Average rainfall in June:
2.68"
- Average rainfall in July:
2.44" - Average rainfall in August:
2.68" - Average rainfall in September:
1.73" - Average rainfall in October:
1.89" - Average rainfall in November:
1.02" - Average rainfall in December:
0.91"
The wettest months (with the highest rainfall) are June and August (2.68").
The driest month (with the least rainfall) is December (0.91").
Average rainfall days
Zion, IL
- Average rainfall days in January:
6.4 days - Average rainfall days in February:
5.2 days - Average rainfall days in March:
10.5 days - Average rainfall days in April:
14.3 days - Average rainfall days in May:
16 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
17 days - Average rainfall days in August:
15.7 days - Average rainfall days in September:
12.7 days - Average rainfall days in October:
12.9 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
8.1 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is February (5.2 days).
Average snowfall
Zion, IL
The month with the highest snowfall is February (2.6").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Zion, IL
- Average snowfall days in January:
12.4 days - Average snowfall days in February:
9.8 days - Average snowfall days in March:
6.2 days - Average snowfall days in April:
2.4 days - Average snowfall days in May:
0.1 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:
0.7 days - Average snowfall days in November:
4.2 days - Average snowfall days in December:
9.7 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Zion, IL
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 6min
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 6min).
- Average sunshine in January:
3h and 42min - Average sunshine in February:
3h and 54min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 48min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 48min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 30min - Average sunshine in September:
9h and 12min - Average sunshine in October:
5h and 36min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Zion, IL
- Average sunshine days in January:
12.4 days - Average sunshine days in February:
12.4 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
12.2 days - Average sunshine days in May:
12.2 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
10.8 days - Average sunshine days in August:
11.6 days - Average sunshine days in September:
13.9 days - Average sunshine days in October:
14.6 days - Average sunshine days in November:
16.5 days - Average sunshine days in December:
15.5 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is July (10.8 days).
Average UV index
Zion, IL
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Zion, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility
Zion, 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).
