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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, in Ontario, Wisconsin, is a freezing cold winter month, with an average temperature fluctuating between 9.3°F (-12.6°C) and 22.1°F (-5.5°C). January tends to be the coldest month, with temperatures averaging a daily high of 22.1°F (-5.5°C) and a low of 9.3°F (-12.6°C). Weather in January »
Weather in February
February, the last month of the winter in Ontario, is another freezing cold month, with an average temperature varying between 13.1°F (-10.5°C) and 26.1°F (-3.3°C). The introduction of February notes a subtle temperature variation to a still freezing cold 26.1°F (-3.3°C) from January's 22.1°F (-5.5°C). Weather in February »
Weather in March
March, the first month of the spring in Ontario, is an icy month, with temperature in the range of an average low of 25.9°F (-3.4°C) and an average high of 40.5°F (4.7°C). A shift in Ontario's weather is noticeable as February turns into March, with the average high temperature increases from a freezing cold 26.1°F (-3.3°C) to a cold 40.5°F (4.7°C). Weather in March »
Weather in April
April is a fresh spring month in Ontario, Wisconsin, with an average temperature ranging between max 53.1°F (11.7°C) and min 36°F (2.2°C). Ontario experiences a temperature shift with the start of April, with average high-temperatures moving from a wintry 40.5°F (4.7°C) in March to a fresh 53.1°F (11.7°C). Weather in April »
Weather in May
May, the last month of the spring in Ontario, is an enjoyable month, with an average temperature varying between 65.8°F (18.8°C) and 47.5°F (8.6°C). Observing a rise in May, the average high-temperature goes from April's fresh 53.1°F (11.7°C) to a comfortable 65.8°F (18.8°C). Weather in May »
Weather in June
June, the first month of the summer in Ontario, is a warm month, with temperature in the range of an average low of 56.5°F (13.6°C) and an average high of 75.6°F (24.2°C). As May transitions into June, a change in temperatures is observed, with average highs moving from a comfortable 65.8°F (18.8°C) to a warm 75.6°F (24.2°C). Weather in June »
Weather in July
July, like June, in Ontario, Wisconsin, is a moderately hot summer month, with an average temperature varying between 79.9°F (26.6°C) and 60.8°F (16°C). July tends to be the warmest month, with temperatures averaging a daily high of 79.9°F (26.6°C) and a low of 60.8°F (16°C). Weather in July »
Weather in August
August, the last month of the summer in Ontario, is also a moderately hot month, with an average temperature varying between 58.5°F (14.7°C) and 78.4°F (25.8°C). August's commencement is accompanied by an average high-temperature of a still warm 78.4°F (25.8°C), diverging marginally from July's 79.9°F (26.6°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Ontario, Wisconsin, with an average temperature fluctuating between 71.1°F (21.7°C) and 51.1°F (10.6°C). As August transitions into September, Ontario sees a gentle drop in the average high-temperature, transitioning from a moderately hot 78.4°F (25.8°C) to an agreeable 71.1°F (21.7°C). Weather in September »
Weather in October
October, the same as September, in Ontario, Wisconsin, is another refreshing autumn month, with temperature in the range of an average high of 55.9°F (13.3°C) and an average low of 40.1°F (4.5°C). October's arrival witnesses a distinct drop in the average high-temperature, receding from September's agreeable 71.1°F (21.7°C) to a moderate 55.9°F (13.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a wintry month in Ontario, Wisconsin, with an average temperature varying between 28.6°F (-1.9°C) and 41.5°F (5.3°C). With the beginning of November, Ontario's average high-temperature experiences a significant decrease, moving from a refreshing 55.9°F (13.3°C) in October to a wintry 41.5°F (5.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Ontario, Wisconsin, with temperature in the range of an average high of 28°F (-2.2°C) and an average low of 17.6°F (-8°C). A shift in Ontario's weather is observed as November turns into December, with the average high temperature reducing from a cold 41.5°F (5.3°C) to a subzero cold 28°F (-2.2°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Ontario?
In Ontario, the average lowest temperatures are observed in January, with a high of 22.1°F (-5.5°C) and a low of 9.3°F (-12.6°C).
What is the most humid month in Ontario?
January is the most humid month, with an average relative humidity of 90%.
What is the driest month in Ontario?
The month with the least rainfall in Ontario is January, when the rain falls for 3.5 days and typically collects 1.1" (28mm) of precipitation.
How many days does it rain in Ontario?
In Ontario, Wisconsin, during the entire year, the rain falls for 131.7 days and collects up to 27.83" (707mm) of precipitation.
When does it snow in Ontario?
Months with snowfall are January through May, October through December.
How many days does it snow in Ontario?
In Ontario, Wisconsin, during the entire year, snow falls for 50.2 days and aggregates up to 21.69" (551mm) of snow.
What is the month with the least sunshine in Ontario?
The month with the least sunshine in Ontario, Wisconsin, is January, with an average of 3h of sunshine.
When is the lowest UV index in Ontario?
The months with the lowest UV index in Ontario, Wisconsin, are January, February, November and December, with an average maximum UV index of 1.
What is the snowiest month in Ontario?
February is the month with the most snowfall. Snow falls for 10.5 days and accumulates 5.87" (149mm) of snow.
When is Daylight Saving Time (DST) in Ontario?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Ontario, 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 Ontario?
The least humid month is April, with an average relative humidity of 77%.
What is the wettest month in Ontario?
June is the month with the most rainfall in Ontario. Rain falls for 16.9 days and accumulates 4.17" (106mm) of precipitation.
When it does not snow in Ontario?
In Ontario, snow does not fall in June through September.
When are the longest days in Ontario?
With an average of 15h and 24min of daylight, June has the longest days of the year in Ontario, Wisconsin.
What is the warmest month in Ontario?
July proves to be the warmest month, recording an average peak temperature of 79.9°F (26.6°C) and a minimum temperature of 60.8°F (16°C).
What month has the most sunshine in Ontario?
With an average of 9.9h of sunshine, July has the most sunshine of the year.
When is the highest UV index in Ontario?
With an average maximum UV index of 6, July is the month with the highest UV index in Ontario, Wisconsin.
What is the month with the shortest days in Ontario?
December has the shortest days of the year, with an average of 9h and 0min of daylight.
Average temperature
Ontario, WI
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (22.1°F).
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).
Average pressure
Ontario, WI
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Ontario, WI
- Average wind speed in January:
9.1mph - Average wind speed in February:
8.9mph - Average wind speed in March:
8.8mph - Average wind speed in April:
9.3mph - Average wind speed in May:
8.1mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.3mph - Average wind speed in October:
8.5mph - Average wind speed in November:
9mph - Average wind speed in December:
8.9mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Ontario, WI
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is April (77%).
Average rainfall
Ontario, WI
- Average rainfall in January:
1.1" - Average rainfall in February:
1.22" - Average rainfall in March:
1.81" - Average rainfall in April:
2.83" - Average rainfall in May:
3.39" - Average rainfall in June:
4.17"
The wettest month (with the highest rainfall) is June (4.17").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days
Ontario, WI
- Average rainfall days in January:
3.5 days - Average rainfall days in February:
4.3 days - Average rainfall days in March:
9.8 days - Average rainfall days in April:
14.3 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
16.9 days
- Average rainfall days in July:
15.6 days - Average rainfall days in August:
13 days - Average rainfall days in September:
12 days - Average rainfall days in October:
11.5 days - Average rainfall days in November:
7.7 days - Average rainfall days in December:
5.6 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (3.5 days).
Average snowfall
Ontario, WI
- Average snowfall in January:
4.88" - Average snowfall in February:
5.87" - Average snowfall in March:
2.68" - Average snowfall in April:
1.81" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Ontario, WI
- Average snowfall days in January:
12.3 days - Average snowfall days in February:
10.5 days - Average snowfall days in March:
6.8 days - Average snowfall days in April:
2.8 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:
1.6 days - Average snowfall days in November:
5.3 days - Average snowfall days in December:
10.6 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Ontario, WI
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 1min - 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 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
3h and 0min - Average sunshine in February:
3h and 2min - Average sunshine in March:
5h and 3min - Average sunshine in April:
7h and 1min - 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 4min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 0min - Average sunshine in November:
4h and 4min - Average sunshine in December:
3h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days
Ontario, WI
- Average sunshine days in January:
17 days - Average sunshine days in February:
14.9 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
12.5 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
10.4 days
- Average sunshine days in July:
11.9 days - Average sunshine days in August:
15.7 days - Average sunshine days in September:
16.3 days - Average sunshine days in October:
17 days - Average sunshine days in November:
17.3 days - Average sunshine days in December:
17.5 days
The month with the most sunshine days is December (17.5 days).
The month with the least sunshine days is June (10.4 days).
Average UV index
Ontario, WI
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover
Ontario, WI
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility
Ontario, WI
The months with the highest visibility are April, May, June, October and November (6mi).
The month with the lowest visibility is January (4mi).
Ontario, Wisconsin, USA
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