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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, Iowa, with an average temperature ranging between min 10.8°F (-11.8°C) and max 23.4°F (-4.8°C). January, noted for its average high-temperature of 23.4°F (-4.8°C) and an average low-temperature of 10.8°F (-11.8°C), is considered the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Thornton, is another freezing cold month, with an average temperature varying between 14.2°F (-9.9°C) and 27.1°F (-2.7°C). The onset of February manifests an average high-temperature of a still subzero cold 27.1°F (-2.7°C), demonstrating a minor variation from the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a wintry month in Thornton, Iowa, with an average temperature ranging between min 28.8°F (-1.8°C) and max 42.6°F (5.9°C). March indicates a noticeable escalation in the average high-temperature, moving up from a subzero cold 27.1°F (-2.7°C) in February to a cold 42.6°F (5.9°C). Weather in March »
Weather in April
April in Thornton, Iowa, is a refreshing spring month, with an average temperature ranging between max 55.8°F (13.2°C) and min 40.3°F (4.6°C). The arrival of April sees a shift in the average high-temperature, moving from a wintry 42.6°F (5.9°C) in March to a moderate 55.8°F (13.2°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Thornton, Iowa, with an average temperature ranging between max 68°F (20°C) and min 51.8°F (11°C). With the onset of May, Thornton experiences a temperature shift, with the average high-temperature moving from a moderate 55.8°F (13.2°C) in April to an agreeable 68°F (20°C). Weather in May »
Weather in June
June, the first month of the summer in Thornton, is a warm month, with temperature in the range of an average low of 61.3°F (16.3°C) and an average high of 77.4°F (25.2°C). June marks a rise in the average high-temperature, moving from May's pleasant 68°F (20°C) to a warm 77.4°F (25.2°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Thornton, Iowa, with an average temperature ranging between min 63.1°F (17.3°C) and max 79.7°F (26.5°C). In Thornton, July is the month with the highest recorded average temperatures, measuring a high of 79.7°F (26.5°C) and a low of 63.1°F (17.3°C). Weather in July »
Weather in August
August, the last month of the summer in Thornton, is another warm month, with an average temperature varying between 77.9°F (25.5°C) and 60.3°F (15.7°C). Thornton's weather in August, with an average high-temperature of a still warm 77.9°F (25.5°C), subtly shifts from July's 79.7°F (26.5°C). Weather in August »
Weather in September
September, the first month of the autumn in Thornton, is still a pleasant month, with an average temperature ranging between max 72.7°F (22.6°C) and min 54.3°F (12.4°C). During September, Thornton records an average high-temperature of a pleasant 72.7°F (22.6°C), marking a slight divergence from August's 77.9°F (25.5°C). Weather in September »
Weather in October
October, the same as September, in Thornton, Iowa, is a moderate autumn month, with temperature in the range of an average high of 57.7°F (14.3°C) and an average low of 43.2°F (6.2°C). As October sets, the average high-temperature displays a significant decrease, moving down from an agreeable 72.7°F (22.6°C) in September to a moderate 57.7°F (14.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Thornton, Iowa, with an average temperature varying between 30.7°F (-0.7°C) and 43.2°F (6.2°C). November's arrival is marked by a notable drop in high-temperatures, falling from a moderate 57.7°F (14.3°C) in October to a chilly 43.2°F (6.2°C). Weather in November »
Weather in December
December, the first month of the winter in Thornton, is still a freezing cold month, with an average temperature ranging between max 28.8°F (-1.8°C) and min 18.3°F (-7.6°C). Thornton's December weather is marked by a distinct drop in high-temperatures, declining from a chilly 43.2°F (6.2°C) in November to a subzero cold 28.8°F (-1.8°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
What are the coldest months in Thornton?
The coldest period in Thornton, Iowa, is January, when temperatures fluctuate between an average high of 23.4°F (-4.8°C) and a low of 10.8°F (-11.8°C).
What is the most humid month in Thornton?
January is the most humid month in Thornton, with an average relative humidity of 88%.
What is the driest month in Thornton?
January is the month with the least rainfall in Thornton. Rain falls for 4.8 days and accumulates 0.98" (25mm) of precipitation.
How much does it rain in Thornton?
Throughout the year, in Thornton, Iowa, there are 136.3 rainfall days, and 26.18" (665mm) of precipitation is accumulated.
When does it snow in Thornton?
Months with snowfall in Thornton are January through May, October through December.
How much does it snow in Thornton?
Throughout the year, there are 44.7 snowfall days, and 20.51" (521mm) of snow is accumulated.
What is the month with the least sunshine in Thornton?
January has the least sunshine of the year in Thornton, with an average of 3.7h of sunshine.
When is the lowest UV index in Thornton?
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Thornton.
When does it snow the most in Thornton?
The month with the most snowfall in Thornton is February, when snow falls for 9.2 days and typically aggregates up to 5.94" (151mm) of snow.
When is Daylight Saving Time (DST) in Thornton?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Thornton, Iowa, 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 in Thornton?
June is the month with the most rainfall. Rain falls for 18.6 days and accumulates 3.98" (101mm) of precipitation.
When it does not snow in Thornton?
In Thornton, snow does not fall in June through September.
When are the longest days in Thornton?
June has the longest days of the year, with an average of 15h and 18min of daylight.
When is the highest UV index in Thornton?
June is the month with the highest UV index in Thornton, Iowa, with an average maximum UV index of 6.
What month is the hottest in Thornton?
Thornton, Iowa, reaches its average highest temperatures in July, measuring 79.7°F (26.5°C) at the peak and 63.1°F (17.3°C) at the lowest.
What month has the most sunshine in Thornton?
With an average of 10h of sunshine, July has the most sunshine of the year in Thornton.
What is the least humid month in Thornton?
The least humid month is October, with an average relative humidity of 70%.
What is the month with the shortest days in Thornton?
The month with the shortest days is December, with an average of 9h and 6min of daylight.
Average temperature
Thornton, IA
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (23.4°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 (10.8°F).
Average pressure
Thornton, IA
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Thornton, IA
- Average wind speed in January:
11mph - Average wind speed in February:
10.9mph - Average wind speed in March:
10.7mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.6mph - Average wind speed in June:
8.5mph
- Average wind speed in July:
7.3mph - Average wind speed in August:
7.4mph - Average wind speed in September:
8.6mph - Average wind speed in October:
10.1mph - Average wind speed in November:
10.8mph - Average wind speed in December:
10.5mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity
Thornton, IA
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Thornton, IA
- Average rainfall in January:
0.98" - Average rainfall in February:
1.3" - Average rainfall in March:
1.57" - Average rainfall in April:
2.95" - Average rainfall in May:
3.39" - Average rainfall in June:
3.98"
The wettest month (with the highest rainfall) is June (3.98").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days
Thornton, IA
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
2.8 days - Average rainfall days in March:
10.1 days - Average rainfall days in April:
15 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
18.6 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
14.3 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
10.6 days - Average rainfall days in November:
8.3 days - Average rainfall days in December:
4.6 days
The month with the highest number of rainy days is June (18.6 days).
The month with the least rainy days is February (2.8 days).
Average snowfall
Thornton, IA
- Average snowfall in January:
4.92" - Average snowfall in February:
5.94" - Average snowfall in March:
3.15" - Average snowfall in April:
1.89" - Average snowfall in May:
0.35" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Thornton, IA
- Average snowfall days in January:
10.8 days - Average snowfall days in February:
9.2 days - Average snowfall days in March:
6.9 days - Average snowfall days in April:
2.5 days - Average snowfall days in May:
0.3 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:
0.9 days - Average snowfall days in November:
4.4 days - Average snowfall days in December:
9.7 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Thornton, IA
- Average daylight in January:
9h and 2min - 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 2min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
4h and 2min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 4min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Thornton, IA
- Average sunshine days in January:
18 days - Average sunshine days in February:
16.4 days - Average sunshine days in March:
15.4 days - Average sunshine days in April:
12.6 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
10 days
- Average sunshine days in July:
10.9 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
18 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
17.8 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (10 days).
Average UV index
Thornton, IA
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover
Thornton, IA
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility
Thornton, IA
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).
Thornton, Iowa, USA
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