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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 Thornton, Illinois, with temperature in the range of an average high of 29.7°F (-1.3°C) and an average low of 18.9°F (-7.3°C). January, known for its average high temperature of 29.7°F (-1.3°C) and an average low temperature of 18.9°F (-7.3°C), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Thornton, Illinois, with an average temperature varying between 21.2°F (-6°C) and 33.1°F (0.6°C). Transitioning into February, Thornton records an average high-temperature of a wintry 33.1°F (0.6°C), almost identical to January's 29.7°F (-1.3°C). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Thornton, Illinois, with an average temperature varying between 32.4°F (0.2°C) and 45.5°F (7.5°C). Thornton's weather in March shows a rise in the average high-temperature, moving up from February's wintry 33.1°F (0.6°C) to a chilly 45.5°F (7.5°C). Weather in March »
Weather in April
April in Thornton, Illinois, is a refreshing spring month, with an average temperature fluctuating between 41.7°F (5.4°C) and 56.7°F (13.7°C). Noticing a change, the average high-temperature during April moves from March's frosty 45.5°F (7.5°C) to a mild 56.7°F (13.7°C). Weather in April »
Weather in May
May, the last month of the spring in Thornton, is an agreeable month, with an average temperature varying between 52.3°F (11.3°C) and 68.7°F (20.4°C). With the onset of May, Thornton's average high-temperature experiences a rise, moving from April's mild 56.7°F (13.7°C) to an agreeable 68.7°F (20.4°C). Weather in May »
Weather in June
June, the first month of the summer in Thornton, is a moderately hot month, with an average temperature ranging between max 77.7°F (25.4°C) and min 61.7°F (16.5°C). With the onset of June, the average high-temperature slightly shifts from May's agreeable 68.7°F (20.4°C) to a moderately hot 77.7°F (25.4°C). Weather in June »
Weather in July
July, like June, in Thornton, Illinois, is another warm summer month, with temperature in the range of an average high of 81.3°F (27.4°C) and an average low of 65.8°F (18.8°C). The highest temperatures are recorded in July, with averages reaching a high of 81.3°F (27.4°C) and a low of 65.8°F (18.8°C). July's heat index is calculated to be a tropical 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Thornton, is another warm month, with temperature in the range of an average high of 80.1°F (26.7°C) and an average low of 64.6°F (18.1°C). August's average high-temperature stands at a still moderately hot 80.1°F (26.7°C), showing little deviation from July's 81.3°F (27.4°C). Weather in August »
Weather in September
September, the first month of the autumn in Thornton, is still a warm month, with an average temperature fluctuating between 58.3°F (14.6°C) and 73.9°F (23.3°C). September's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's moderately hot 80.1°F (26.7°C) to a still warm 73.9°F (23.3°C). Weather in September »
Weather in October
October, like September, in Thornton, Illinois, is another enjoyable autumn month, with an average temperature varying between 61.2°F (16.2°C) and 46.9°F (8.3°C). The onset of October entails a temperature shift, as the average high-temperature decreases from a moderately hot 73.9°F (23.3°C) in September to an enjoyable 61.2°F (16.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Thornton, is also a frosty month, with temperature in the range of an average high of 46.9°F (8.3°C) and an average low of 34.9°F (1.6°C). A shift in the average high-temperature occurs in November, reducing from an enjoyable 61.2°F (16.2°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 Thornton, Illinois, with temperature in the range of an average low of 25.9°F (-3.4°C) and an average high of 35.6°F (2°C). Thornton's weather changes with the onset of December, slightly falling from a frosty 46.9°F (8.3°C) in November to a wintry 35.6°F (2°C). Weather in December »
[Resources]Frequently asked questions
What part of the year is the coldest in Thornton?
Temperature records mark January as the coldest month, with highs averaging 29.7°F (-1.3°C) and lows at 18.9°F (-7.3°C).
What are the most humid months in Thornton?
The months with the highest humidity in Thornton are January and February, with an average relative humidity of 82%.
How much does it rain in Thornton?
In Thornton, during the entire year, the rain falls for 155.6 days and collects up to 31.3" (795mm) of precipitation.
When does it snow in Thornton?
Months with snowfall are January through April, October through December.
When does it snow the most in Thornton?
The month with the most snowfall in Thornton is January, when snow falls for 12.6 days and typically aggregates up to 4.53" (115mm) of snow.
How many days does it snow in Thornton?
In Thornton, Illinois, during the entire year, snow falls for 44.6 days and aggregates up to 16.46" (418mm) of snow.
What is the month with the least sunshine in Thornton?
January has the least sunshine of the year in Thornton, with an average of 3.6h of sunshine.
When is Daylight Saving Time (DST) in Thornton?
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 rainiest month in Thornton?
The month with the most rainfall is May, when the rain falls for 17.4 days and typically aggregates up to 4.17" (106mm) of precipitation.
When it does not snow in Thornton?
In Thornton, snow does not fall in May through September.
When are the longest days in Thornton?
June has the longest days of the year, with an average of 15h and 6min of daylight.
What are the months with the highest UV index in Thornton?
June and July, with an average maximum UV index of 6, are months with the highest UV index in Thornton, Illinois.
What is the warmest month in Thornton?
The warmest time of the year is July, with temperatures averaging a high of 81.3°F (27.4°C) and a low of 65.8°F (18.8°C).
What month has the most sunshine in Thornton?
With an average of 10.1h of sunshine, August has the most sunshine of the year in Thornton, Illinois.
What is the least humid month in Thornton?
The least humid month is October, with an average relative humidity of 73%.
What is the driest month in Thornton?
December is the month with the least rainfall in Thornton, Illinois. Rain falls for 7.9 days and accumulates 1.54" (39mm) of precipitation.
What is the month with the shortest days in Thornton?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
When is the lowest UV index in Thornton?
With an average maximum UV index of 1, December is the month with the lowest UV index in Thornton.
Average temperature
Thornton, IL
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.7°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Thornton, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"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:
29.92"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:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Thornton, IL
- Average wind speed in January:
10.2mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.5mph - Average wind speed in April:
9.8mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.4mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.3mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.5mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity
Thornton, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Thornton, IL
- Average rainfall in January:
1.77" - Average rainfall in February:
1.69" - Average rainfall in March:
2.09" - Average rainfall in April:
3.43" - Average rainfall in May:
4.17" - Average rainfall in June:
3.82"
- Average rainfall in July:
3.31" - Average rainfall in August:
2.56" - Average rainfall in September:
2.48" - Average rainfall in October:
2.76" - Average rainfall in November:
1.69" - Average rainfall in December:
1.54"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is December (1.54").
Average rainfall days
Thornton, IL
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
12.7 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
17.4 days - Average rainfall days in June:
17.4 days
- Average rainfall days in July:
17.6 days - Average rainfall days in August:
14.8 days - Average rainfall days in September:
13.4 days - Average rainfall days in October:
14.3 days - Average rainfall days in November:
10.4 days - Average rainfall days in December:
7.9 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (6.1 days).
Average snowfall
Thornton, IL
The month with the highest snowfall is January (4.53").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Thornton, IL
- Average snowfall days in January:
12.6 days - Average snowfall days in February:
10.5 days - Average snowfall days in March:
6.1 days - Average snowfall days in April:
1.9 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:
0.3 days - Average snowfall days in November:
4 days - Average snowfall days in December:
9.1 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Thornton, 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 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 0min - 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:
9h and 5min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Thornton, IL
- Average sunshine days in January:
13 days - Average sunshine days in February:
11.8 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
10.2 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
10.4 days
- Average sunshine days in July:
11.1 days - Average sunshine days in August:
13.3 days - Average sunshine days in September:
14 days - Average sunshine days in October:
14.4 days - Average sunshine days in November:
16.4 days - Average sunshine days in December:
15 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is April (10.2 days).
Average UV index
Thornton, IL
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Thornton, IL
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Thornton, IL
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Thornton, Illinois, USA
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