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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, the same as December, is another cold winter month in Dow, Illinois, with an average temperature fluctuating between 22.6°F (-5.2°C) and 35.6°F (2°C). Temperature records mark January as the coldest month, with highs averaging 35.6°F (2°C) and lows at 22.6°F (-5.2°C). Weather in January »
Weather in February
February, the last month of the winter in Dow, is another cold month, with an average temperature varying between 26.4°F (-3.1°C) and 40.6°F (4.8°C). February's advent notes a subtle adjustment in average high-temperature to a still wintry 40.6°F (4.8°C) from January. Weather in February »
Weather in March
March, the first month of the spring in Dow, is a fresh month, with an average temperature varying between 37°F (2.8°C) and 52.5°F (11.4°C). Dow's March weather brings a rise in high-temperatures, moving from a wintry 40.6°F (4.8°C) in February to a cool 52.5°F (11.4°C). Weather in March »
Weather in April
April in Dow, Illinois, is an enjoyable spring month, with an average temperature ranging between min 46.8°F (8.2°C) and max 64.2°F (17.9°C). With the arrival of April, the average high-temperature transitions from a cool 52.5°F (11.4°C) in March to an enjoyable 64.2°F (17.9°C). Weather in April »
Weather in May
May, the last month of the spring in Dow, is a warm month, with an average temperature fluctuating between 73.9°F (23.3°C) and 56.7°F (13.7°C). The shift into May is accompanied by a temperature increase, with the average high-temperature rising from a refreshing 64.2°F (17.9°C) in April to a warm 73.9°F (23.3°C). Weather in May »
Weather in June
The first month of the summer, June, is still a warm month in Dow, Illinois, with an average temperature fluctuating between 82.8°F (28.2°C) and 65.7°F (18.7°C). June witnesses a minor rise in the average high-temperature, transitioning from a warm 73.9°F (23.3°C) in May to a still moderately hot 82.8°F (28.2°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Dow, Illinois, with an average temperature fluctuating between 84.7°F (29.3°C) and 67.6°F (19.8°C). Dow notes the warmest temperatures in July, with a high average of 84.7°F (29.3°C) and a low of 67.6°F (19.8°C). In July, the average heat index is calculated to be a very hot 96.8°F (36°C). Weather in July »
Weather in August
August, the last month of the summer in Dow, is also a moderately hot month, with an average temperature fluctuating between 83.7°F (28.7°C) and 65.5°F (18.6°C). Dow experiences an average high-temperature of a still warm 83.7°F (28.7°C) in August, marking an insignificant shift from 84.7°F (29.3°C) in July. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Dow, Illinois, with an average temperature ranging between max 78.4°F (25.8°C) and min 59.4°F (15.2°C). The shift to September signals an average high-temperature of a still moderately hot 78.4°F (25.8°C), subtly varied from August's 83.7°F (28.7°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Dow, Illinois, with an average temperature varying between 48.2°F (9°C) and 65.3°F (18.5°C). The start of October comes with a reduction in the average high-temperature, receding from a warm 78.4°F (25.8°C) in September to a refreshing 65.3°F (18.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Dow, is also a fresh month, with an average temperature varying between 36.9°F (2.7°C) and 51.8°F (11°C). Dow's transition into November involves a shift in temperature, receding from a refreshing 65.3°F (18.5°C) in October to a cool 51.8°F (11°C). Weather in November »
Weather in December
December, the first month of the winter in Dow, is also an icy month, with temperature in the range of an average low of 29.3°F (-1.5°C) and an average high of 40.6°F (4.8°C). With December's onset, the average high-temperature recedes from November's cool 51.8°F (11°C) to a wintry 40.6°F (4.8°C). Weather in December »
Updated: Jul 8, 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 is the coldest time of year?
January, marked by an average high-temperature of 35.6°F (2°C) and a low-temperature of 22.6°F (-5.2°C), is the coldest month.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 5.9 days and typically collects 1.06" (27mm) of precipitation.
How much does it rain?
Throughout the year, in Dow, there are 136.5 rainfall days, and 23.11" (587mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through March, November and December.
How much does it snow?
In Dow, during the entire year, snow falls for 20.9 days and aggregates up to 6.26" (159mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.5h of sunshine.
What is the month with the lowest UV index in Dow?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
When does it snow the most?
The month with the most snowfall is February, when snow falls for 5.9 days and typically aggregates up to 2.17" (55mm) of snow.
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.
When it does not snow?
April through October are months without snowfall.
What is the month with the highest UV index in Dow?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
What is the wettest month?
June is the month with the most rainfall. Rain falls for 14.3 days and accumulates 3.07" (78mm) of precipitation.
When are the longest days?
The month with the longest days is June, with an average of 14h and 54min of daylight.
What month has the most sunshine in Dow?
June has the most sunshine of the year, with an average of 10.4h of sunshine.
What is the hottest time of year?
With its average high temperature of 84.7°F (29.3°C) and a low of 67.6°F (19.8°C), July is regarded as the warmest month.
What is the most humid month?
July is the most humid month, with an average relative humidity of 80%.
What is the least humid month?
With an average relative humidity of 71%, October is the least humid month.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 30min of daylight.
Average temperature
Dow, IL
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (35.6°F).
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure
Dow, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Dow, IL
- Average wind speed in January:
9.6mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.3mph - Average wind speed in April:
9.4mph - Average wind speed in May:
7.6mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.8mph - Average wind speed in September:
6.3mph - Average wind speed in October:
8.2mph - Average wind speed in November:
9mph - Average wind speed in December:
9.1mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity
Dow, IL
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Dow, IL
- Average rainfall in January:
1.06" - Average rainfall in February:
1.18" - Average rainfall in March:
1.77" - Average rainfall in April:
2.64" - Average rainfall in May:
2.68" - Average rainfall in June:
3.07"
- Average rainfall in July:
2.32" - Average rainfall in August:
2.52" - Average rainfall in September:
1.57" - Average rainfall in October:
1.65" - Average rainfall in November:
1.34" - Average rainfall in December:
1.3"
The wettest month (with the highest rainfall) is June (3.07").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days
Dow, IL
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
6.7 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
15.9 days - Average rainfall days in August:
13 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (5.9 days).
Average snowfall
Dow, IL
The month with the highest snowfall is February (2.17").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Dow, IL
- Average snowfall days in January:
6.2 days - Average snowfall days in February:
5.9 days - Average snowfall days in March:
2.6 days - Average snowfall days in April:
0.2 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:
0.1 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
4.4 days
The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Dow, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 3min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 3min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 3min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days
Dow, IL
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
16.2 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
14.3 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
13.1 days - Average sunshine days in August:
15.1 days - Average sunshine days in September:
16.6 days - Average sunshine days in October:
20.2 days - Average sunshine days in November:
18.9 days - Average sunshine days in December:
19.4 days
The month with the most sunshine days is January (20.3 days).
The months with the least sunshine days are May and June (12.3 days).
Average UV index
Dow, IL
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Dow, IL
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are August and September (Cloud cover 28).
Average visibility
Dow, 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).
Dow, Illinois, USA
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