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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 Dover, Illinois, with an average temperature ranging between min 16.5°F (-8.6°C) and max 28.8°F (-1.8°C). Dover witnesses the coldest weather in January, with temperatures averaging a high of 28.8°F (-1.8°C) and a low of 16.5°F (-8.6°C). Weather in January »
Weather in February
February, the last month of the winter in Dover, is an icy month, with temperature in the range of an average high of 32.7°F (0.4°C) and an average low of 19.8°F (-6.8°C). The arrival of February sees an average high-temperature of a wintry 32.7°F (0.4°C), hardly diverging from January's 28.8°F (-1.8°C). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Dover, Illinois, with temperature in the range of an average low of 32°F (0°C) and an average high of 46.8°F (8.2°C). March indicates a change in the average high-temperature, moving up from a wintry 32.7°F (0.4°C) in February to a frosty 46.8°F (8.2°C). Weather in March »
Weather in April
April in Dover, Illinois, is a refreshing spring month, with an average temperature varying between 58.6°F (14.8°C) and 42.4°F (5.8°C). April's arrival signals an increase in average high-temperatures, moving from March's frosty 46.8°F (8.2°C) to a refreshing 58.6°F (14.8°C). Weather in April »
Weather in May
May, the last month of the spring in Dover, is an agreeable month, with an average temperature varying between 70.3°F (21.3°C) and 53.4°F (11.9°C). With the onset of May, Dover's weather sees a temperature rise, transitioning from a moderate 58.6°F (14.8°C) in April to an agreeable 70.3°F (21.3°C). Weather in May »
Weather in June
June, the first month of the summer in Dover, is a moderately hot month, with an average temperature fluctuating between 78.6°F (25.9°C) and 61.5°F (16.4°C). June comes with a subtle rise, with the average high-temperature adjusting from an agreeable 70.3°F (21.3°C) in May to a warm 78.6°F (25.9°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Dover, Illinois, with an average temperature ranging between max 80.6°F (27°C) and min 64.2°F (17.9°C). The temperatures reach their highest averages in July, with highs of 80.6°F (27°C) and lows of 64.2°F (17.9°C). The heat index value during July is evaluated at a tropical 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Dover, is also a moderately hot month, with an average temperature fluctuating between 62.1°F (16.7°C) and 79.5°F (26.4°C). The dawn of August sees an average high-temperature of a still warm 79.5°F (26.4°C), subtly contrasting with July's 80.6°F (27°C). Weather in August »
Weather in September
September, the first month of the autumn in Dover, is also a moderately hot month, with an average temperature fluctuating between 74.7°F (23.7°C) and 56.1°F (13.4°C). Dover notes an average high-temperature of a still warm 74.7°F (23.7°C) in September, displaying minor variation from August. Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Dover, Illinois, with an average temperature fluctuating between 61.2°F (16.2°C) and 45.3°F (7.4°C). The onset of October coincides with a reduction in the average high-temperature, falling from a warm 74.7°F (23.7°C) in September to a comfortable 61.2°F (16.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Dover, is another chilly month, with temperature in the range of an average low of 33.6°F (0.9°C) and an average high of 46.4°F (8°C). November's arrival witnesses a distinct drop in the average high-temperature, receding from October's enjoyable 61.2°F (16.2°C) to a chilly 46.4°F (8°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Dover, Illinois, with an average temperature fluctuating between 24.1°F (-4.4°C) and 34.5°F (1.4°C). December brings a minor decrease, with the average high-temperature reducing from a chilly 46.4°F (8°C) in November to a wintry 34.5°F (1.4°C). Weather in December »
Updated: Jul 16, 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 month?
In Dover, January is the coldest month, with temperatures averaging a high of 28.8°F (-1.8°C) and a low of 16.5°F (-8.6°C).
What is the driest month?
The month with the least rainfall is January, when the rain falls for 4.8 days and typically collects 0.75" (19mm) of precipitation.
How much does it rain?
In Dover, during the entire year, the rain falls for 130 days and collects up to 17.64" (448mm) of precipitation.
When does it snow in Dover?
Months with snowfall in Dover, Illinois, are January through April, October through December.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 10.4 days and typically aggregates up to 2.09" (53mm) of snow.
How much does it snow?
In Dover, Illinois, during the entire year, snow falls for 33.4 days and aggregates up to 7.05" (179mm) of snow.
What is the month with the least sunshine?
With an average of 3.8h of sunshine, January has the least sunshine of the year.
What are the months with the lowest UV index?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
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?
May is the month with the most rainfall. Rain falls for 17 days and accumulates 2.91" (74mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
When are the longest days?
With an average of 15h and 6min of daylight, June has the longest days of the year.
What is the month with the most sunshine?
The months with the most sunshine are June and July, with an average of 9.7h of sunshine.
What part of the year is the hottest?
In Dover, July is known for its average highest temperatures, reaching a high of 80.6°F (27°C) and a low of 64.2°F (17.9°C).
What is the most humid month?
The most humid month is July, with an average relative humidity of 85%.
What is the month with the highest UV index?
The month with the highest UV index is July, with an average maximum UV index of 6.
What is the least humid month?
The least humid month is October, with an average relative humidity of 72%.
What is the month with the shortest days in Dover?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Dover, IL
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure
Dover, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"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 (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Dover, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.5mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9.2mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.6mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Dover, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Dover, IL
- Average rainfall in January:
0.75" - Average rainfall in February:
0.83" - Average rainfall in March:
1.1" - Average rainfall in April:
2.09" - Average rainfall in May:
2.91" - Average rainfall in June:
1.89"
- Average rainfall in July:
1.77" - Average rainfall in August:
1.5" - Average rainfall in September:
1.22" - Average rainfall in October:
1.65" - Average rainfall in November:
1.02" - Average rainfall in December:
0.91"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days
Dover, IL
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
4.5 days - Average rainfall days in March:
10.6 days - Average rainfall days in April:
14.7 days - Average rainfall days in May:
17 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
14.3 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
10.7 days - Average rainfall days in November:
8.1 days - Average rainfall days in December:
6.2 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.5 days).
Average snowfall
Dover, IL
The month with the highest snowfall is January (2.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Dover, IL
- Average snowfall days in January:
10.4 days - Average snowfall days in February:
8.5 days - Average snowfall days in March:
3.6 days - Average snowfall days in April:
0.8 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:
0.1 days - Average snowfall days in October:
0.4 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
7.1 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Dover, 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 5min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The months with the most sunshine are June and July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Dover, IL
- Average sunshine days in January:
17.8 days - Average sunshine days in February:
15.6 days - Average sunshine days in March:
17 days - Average sunshine days in April:
13.4 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
11.8 days
- Average sunshine days in July:
12.9 days - Average sunshine days in August:
15.4 days - Average sunshine days in September:
17.6 days - Average sunshine days in October:
18.1 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
17.5 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (11.8 days).
Average UV index
Dover, IL
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Dover, IL
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility
Dover, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Dover, Illinois, USA
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