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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 Sumner, Wisconsin, with an average temperature ranging between min 5.4°F (-14.8°C) and max 17.6°F (-8°C). During the coldest month, January, temperatures average a high of 17.6°F (-8°C) and a low of 5.4°F (-14.8°C). Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Sumner, Wisconsin, with an average temperature varying between 8.1°F (-13.3°C) and 21.9°F (-5.6°C). February observes an average high-temperature of a still freezing cold 21.9°F (-5.6°C), marking an insignificant difference from January's 17.6°F (-8°C). Weather in February »
Weather in March
The first month of the spring, March, is a wintry month in Sumner, Wisconsin, with an average temperature ranging between max 37°F (2.8°C) and min 22.5°F (-5.3°C). A clear escalation in the average high-temperature is witnessed with the onset of March, advancing from a subzero cold 21.9°F (-5.6°C) in February to a cold 37°F (2.8°C). Weather in March »
Weather in April
April is a chilly spring month in Sumner, Wisconsin, with an average temperature varying between 33.4°F (0.8°C) and 49.6°F (9.8°C). In April, the meteorological conditions change with the average high-temperature moving from a wintry 37°F (2.8°C) in March to a chilly 49.6°F (9.8°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Sumner, Wisconsin, with temperature in the range of an average high of 64°F (17.8°C) and an average low of 45.5°F (7.5°C). The beginning of May marks a clear shift in the average high-temperature, advancing from April's chilly 49.6°F (9.8°C) to a refreshing 64°F (17.8°C). Weather in May »
Weather in June
June, the first month of the summer in Sumner, is a moderately hot month, with an average temperature varying between 73.6°F (23.1°C) and 54.3°F (12.4°C). Sumner's June weather brings a rise in high-temperatures, moving from an enjoyable 64°F (17.8°C) in May to a warm 73.6°F (23.1°C). Weather in June »
Weather in July
July, like June, in Sumner, Wisconsin, is another warm summer month, with an average temperature fluctuating between 78.4°F (25.8°C) and 59.4°F (15.2°C). In Sumner, the average temperatures in July are the highest, with a peak at 78.4°F (25.8°C) and a low of 59.4°F (15.2°C). Weather in July »
Weather in August
August, the last month of the summer in Sumner, is another warm month, with an average temperature ranging between max 76.6°F (24.8°C) and min 56.8°F (13.8°C). The arrival of August denotes a barely perceptible change in the average high-temperatures to a still moderately hot 76.6°F (24.8°C) from July's 78.4°F (25.8°C). Weather in August »
Weather in September
September, the first month of the autumn in Sumner, is also an agreeable month, with an average temperature varying between 68.9°F (20.5°C) and 49.6°F (9.8°C). A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a moderately hot 76.6°F (24.8°C) to an agreeable 68.9°F (20.5°C). Weather in September »
Weather in October
October, like September, in Sumner, Wisconsin, is a cool autumn month, with an average temperature ranging between min 38.3°F (3.5°C) and max 53.2°F (11.8°C). The shift into October is marked by a considerable temperature decrease, with the average high-temperature dropping from a pleasant 68.9°F (20.5°C) in September to a cool 53.2°F (11.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Sumner, is also an icy month, with an average temperature fluctuating between 38.1°F (3.4°C) and 26.1°F (-3.3°C). The start of November is characterized by a significant decrease in the average high-temperature, moving from a cool 53.2°F (11.8°C) in October to a wintry 38.1°F (3.4°C). Weather in November »
Weather in December
The first month of the winter, December, is still a freezing cold month in Sumner, Wisconsin, with an average temperature fluctuating between 13.1°F (-10.5°C) and 23.5°F (-4.7°C). December signals a considerable drop in Sumner's average high-temperature, reducing from an icy 38.1°F (3.4°C) in November to a freezing cold 23.5°F (-4.7°C). Weather in December »
Updated: Feb 14, 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 part of the year is the coldest in Sumner?
In Sumner, Wisconsin, the lowest temperatures are generally noted in January, averaging a high of 17.6°F (-8°C) and a low of 5.4°F (-14.8°C).
What are the most humid months in Sumner?
The months with the highest humidity in Sumner, Wisconsin, are January and February, with an average relative humidity of 92%.
What is the driest month in Sumner?
The month with the least rainfall in Sumner, Wisconsin, is January, when the rain falls for 3.8 days and typically collects 0.87" (22mm) of precipitation.
How much does it rain in Sumner?
Throughout the year, in Sumner, there are 137.1 rainfall days, and 24.72" (628mm) of precipitation is accumulated.
When does it snow in Sumner?
January through May, October through December are months with snowfall in Sumner, Wisconsin.
How much does it snow in Sumner?
Throughout the year, in Sumner, there are 84.2 snowfall days, and 30.63" (778mm) of snow is accumulated.
What is the month with the least sunshine in Sumner?
The month with the least sunshine in Sumner is January, with an average of 2.8h of sunshine.
What is the month with the lowest UV index in Sumner?
The months with the lowest UV index in Sumner are January, February and December, with an average maximum UV index of 1.
What is the snowiest month in Sumner?
The month with the most snowfall in Sumner is February, when snow falls for 16.8 days and typically aggregates up to 6.65" (169mm) of snow.
When is Daylight Saving Time (DST) in Sumner?
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 least humid month in Sumner?
The least humid month in Sumner is May, with an average relative humidity of 76%.
What is the wettest month in Sumner?
The month with the most rainfall in Sumner, Wisconsin, is June, when the rain falls for 19 days and typically aggregates up to 3.82" (97mm) of precipitation.
When it does not snow in Sumner?
June through September are months without snowfall.
When are the longest days in Sumner?
June has the longest days of the year, with an average of 15h and 36min of daylight.
What is the hottest time of year in Sumner?
Sumner reaches its average highest temperatures in July, measuring 78.4°F (25.8°C) at the peak and 59.4°F (15.2°C) at the lowest.
What month has the most sunshine in Sumner?
The month with the most sunshine is July, with an average of 9.8h of sunshine.
What is the month with the highest UV index in Sumner?
The month with the highest UV index is July, with an average maximum UV index of 6.
What is the month with the shortest days in Sumner?
December has the shortest days of the year, with an average of 8h and 48min of daylight.
Average temperature
Sumner, WI
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (17.6°F).
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure
Sumner, WI
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.89"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.94"Hg - Average pressure in September:
30"Hg - Average pressure in October:
29.97"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.1"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Sumner, WI
- Average wind speed in January:
8.6mph - Average wind speed in February:
8.6mph - Average wind speed in March:
8.4mph - Average wind speed in April:
9mph - Average wind speed in May:
8mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.5mph - Average wind speed in October:
8.4mph - Average wind speed in November:
8.7mph - Average wind speed in December:
8.5mph
The windiest month (with the highest average wind speed) is April (9mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity
Sumner, WI
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (76%).
Average rainfall
Sumner, WI
- Average rainfall in January:
0.87" - Average rainfall in February:
1.1" - Average rainfall in March:
1.42" - Average rainfall in April:
2.72" - Average rainfall in May:
3.11" - Average rainfall in June:
3.82"
The wettest month (with the highest rainfall) is June (3.82").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days
Sumner, WI
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
3.6 days - Average rainfall days in March:
10.2 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
19 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
14.8 days - Average rainfall days in September:
12.4 days - Average rainfall days in October:
12.6 days - Average rainfall days in November:
7.4 days - Average rainfall days in December:
4.9 days
The month with the highest number of rainy days is June (19 days).
The month with the least rainy days is February (3.6 days).
Average snowfall
Sumner, WI
- Average snowfall in January:
4.88" - Average snowfall in February:
6.65" - Average snowfall in March:
3.58" - Average snowfall in April:
4.02" - Average snowfall in May:
0.67" - Average snowfall in June:
0"
The month with the highest snowfall is February (6.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Sumner, WI
- Average snowfall days in January:
18.8 days - Average snowfall days in February:
16.8 days - Average snowfall days in March:
11.5 days - Average snowfall days in April:
6.5 days - Average snowfall days in May:
0.9 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:
2.5 days - Average snowfall days in November:
10.2 days - Average snowfall days in December:
17 days
The month with the highest number of snowfall days is January (18.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Sumner, WI
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 4min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 2min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 3min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
2h and 5min - Average sunshine in February:
2h and 5min - Average sunshine in March:
4h and 5min - Average sunshine in April:
6h and 5min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 1min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 2min - Average sunshine in September:
8h and 2min - Average sunshine in October:
4h and 5min - Average sunshine in November:
4h and 2min - Average sunshine in December:
2h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days
Sumner, WI
- Average sunshine days in January:
12.2 days - Average sunshine days in February:
11.3 days - Average sunshine days in March:
12.8 days - Average sunshine days in April:
10.3 days - Average sunshine days in May:
11.4 days - Average sunshine days in June:
9.4 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
13.1 days - Average sunshine days in September:
15.7 days - Average sunshine days in October:
15.9 days - Average sunshine days in November:
15.2 days - Average sunshine days in December:
13.5 days
The month with the most sunshine days is October (15.9 days).
The month with the least sunshine days is June (9.4 days).
Average UV index
Sumner, WI
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover
Sumner, WI
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility
Sumner, WI
The months with the highest visibility are April, May, June and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Sumner, Wisconsin, USA
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