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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 a freezing cold winter month in Downers Grove, Iowa, with an average temperature fluctuating between 25.2°F (-3.8°C) and 13.3°F (-10.4°C). January is the month that records the lowest temperatures, with averages ranging from a high of 25.2°F (-3.8°C) to a low of 13.3°F (-10.4°C). Weather in January »
Weather in February
February, the last month of the winter in Downers Grove, is also a subzero cold month, with an average temperature ranging between min 16°F (-8.9°C) and max 28.9°F (-1.7°C). February's arrival registers an average high-temperature of a still freezing cold 28.9°F (-1.7°C), closely aligning with the temperature of the previous month. Weather in February »
Weather in March
March, the first month of the spring in Downers Grove, is a chilly month, with an average temperature ranging between max 44.2°F (6.8°C) and min 29.5°F (-1.4°C). Downers Grove sees a considerable increase in average high-temperatures during March, surging from a freezing cold 28.9°F (-1.7°C) in February to a chilly 44.2°F (6.8°C). Weather in March »
Weather in April
April is a mild spring month in Downers Grove, Iowa, with an average temperature varying between 56.1°F (13.4°C) and 39.9°F (4.4°C). Downers Grove's transition into April brings a rise in the average high-temperature, moving from a frosty 44.2°F (6.8°C) in March to a moderate 56.1°F (13.4°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Downers Grove, Iowa, with temperature in the range of an average low of 51.1°F (10.6°C) and an average high of 68.4°F (20.2°C). May's arrival sees a rise in the average high-temperature, jumping from April's moderate 56.1°F (13.4°C) to a pleasant 68.4°F (20.2°C). Weather in May »
Weather in June
June, the first month of the summer in Downers Grove, is a moderately hot month, with an average temperature ranging between max 77°F (25°C) and min 60.4°F (15.8°C). A soft shift in the average high-temperature is noticeable in June, transitioning from a pleasant 68.4°F (20.2°C) in May to a warm 77°F (25°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Downers Grove, Iowa, with an average temperature fluctuating between 80.1°F (26.7°C) and 63.3°F (17.4°C). Temperature records mark July as the warmest month, with highs averaging 80.1°F (26.7°C) and lows at 63.3°F (17.4°C). Weather in July »
Weather in August
August, the last month of the summer in Downers Grove, is another warm month, with an average temperature ranging between min 60.6°F (15.9°C) and max 78.6°F (25.9°C). In the transition from July to August, Downers Grove reports an average high-temperature of a still warm 78.6°F (25.9°C), indicating a close resemblance to the prior month. Weather in August »
Weather in September
September, the first month of the autumn in Downers Grove, is still a pleasant month, with temperature in the range of an average low of 54.3°F (12.4°C) and an average high of 73°F (22.8°C). A mild shift in the average high-temperature occurs in September, reducing from a moderately hot 78.6°F (25.9°C) in August to an agreeable 73°F (22.8°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Downers Grove, Iowa, with an average temperature ranging between min 43.2°F (6.2°C) and max 58.6°F (14.8°C). Witnessing a clear drop in October, the average high-temperature declines from September's agreeable 73°F (22.8°C) to a moderate 58.6°F (14.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Downers Grove, is another chilly month, with an average temperature varying between 31.3°F (-0.4°C) and 44.6°F (7°C). Transition from October to November is accompanied by a temperature drop, with average high-temperatures decreasing from a refreshing 58.6°F (14.8°C) to a chilly 44.6°F (7°C). Weather in November »
Weather in December
The first month of the winter, December, is still a freezing cold month in Downers Grove, Iowa, with an average temperature varying between 21.4°F (-5.9°C) and 31.8°F (-0.1°C). In Downers Grove, the beginning of December is marked by a lowered average high-temperature, shifting from November's frosty 44.6°F (7°C) to a freezing cold 31.8°F (-0.1°C). Weather in December »
Updated: Aug 26, 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?
With its average high temperature of 25.2°F (-3.8°C) and a low of 13.3°F (-10.4°C), January is regarded as the coldest month.
What are the most humid months?
January and February, with an average relative humidity of 86%, are most humid months.
What is the driest month?
January and February are months with the least rain in Downers Grove, Iowa, when the rain falls for 5.2 days and typically aggregates up to 1.26" (32mm) of rain.
How many days does it rain in Downers Grove?
In Downers Grove, during the entire year, the rain falls for 142.5 days and collects up to 28.27" (718mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall.
When does it snow the most?
The month with the most snowfall in Downers Grove is January, when snow falls for 12.1 days and typically aggregates up to 5.04" (128mm) of snow.
How much does it snow?
Throughout the year, there are 43.2 snowfall days, and 17.17" (436mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 3.8h of sunshine, January has the least sunshine of the year.
When is the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
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 wettest month in Downers Grove?
The month with the most rainfall is May, when the rain falls for 18.6 days and typically aggregates up to 4.25" (108mm) of precipitation.
When it does not snow in Downers Grove?
In Downers Grove, snow does not fall in May through September.
When are the longest days?
June has the longest days of the year, with an average of 15h and 12min of daylight.
When is the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What time of the year is the hottest?
Downers Grove, Iowa, records the warmest temperatures in July, averaging a high of 80.1°F (26.7°C) and a low of 63.3°F (17.4°C).
What is the month with the most sunshine?
The months with the most sunshine are July and August, with an average of 9.9h of sunshine.
What is the least humid month?
The least humid month is October, with an average relative humidity of 74%.
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
Downers Grove, IA
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (25.2°F).
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure
Downers Grove, IA
- 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:
29.94"Hg - Average pressure in June:
29.9"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"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Downers Grove, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.1mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
7mph - Average wind speed in August:
6.9mph - Average wind speed in September:
8mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity
Downers Grove, IA
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Downers Grove, IA
- Average rainfall in January:
1.26" - Average rainfall in February:
1.26" - Average rainfall in March:
1.85" - Average rainfall in April:
3.15" - Average rainfall in May:
4.25" - Average rainfall in June:
3.78"
- Average rainfall in July:
2.83" - Average rainfall in August:
1.77" - Average rainfall in September:
2.52" - Average rainfall in October:
2.52" - Average rainfall in November:
1.65" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is May (4.25").
The driest months (with the least rainfall) are January and February (1.26").
Average rainfall days
Downers Grove, IA
- Average rainfall days in January:
5.2 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
16 days - Average rainfall days in May:
18.6 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
12.5 days - Average rainfall days in September:
11.4 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
7.7 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (5.2 days).
Average snowfall
Downers Grove, IA
The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Downers Grove, IA
- Average snowfall days in January:
12.1 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
6 days - Average snowfall days in April:
1.6 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:
0.6 days - Average snowfall days in November:
4 days - Average snowfall days in December:
9.4 days
The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Downers Grove, IA
- 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 5min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 1min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Downers Grove, IA
- Average sunshine days in January:
15.8 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
11.1 days - Average sunshine days in May:
10.6 days - Average sunshine days in June:
10.5 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
16.7 days - Average sunshine days in September:
17 days - Average sunshine days in October:
16.9 days - Average sunshine days in November:
16.8 days - Average sunshine days in December:
16.7 days
The month with the most sunshine days is September (17 days).
The month with the least sunshine days is June (10.5 days).
Average UV index
Downers Grove, IA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Downers Grove, IA
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Downers Grove, IA
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Downers Grove, Iowa, USA
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