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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
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Ontario, Ohio, with an average temperature ranging between min 18.3°F (-7.6°C) and max 30.7°F (-0.7°C). January is the coldest month, with the temperature often reaching an average high of 30.7°F (-0.7°C) and an average low of 18.3°F (-7.6°C). Weather in January »
Weather in February
February, the last month of the winter in Ontario, is a wintry month, with temperature in the range of an average high of 35.1°F (1.7°C) and an average low of 21.7°F (-5.7°C). February experiences an average high-temperature of a wintry 35.1°F (1.7°C), barely different from January's 30.7°F (-0.7°C). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Ontario, Ohio, with an average temperature varying between 45.9°F (7.7°C) and 30.4°F (-0.9°C). The commencement of March sees a shift in the average high-temperature, moving from an icy 35.1°F (1.7°C) in February to a frosty 45.9°F (7.7°C). Weather in March »
Weather in April
April is a refreshing spring month in Ontario, Ohio, with temperature in the range of an average low of 40.6°F (4.8°C) and an average high of 58.3°F (14.6°C). April's onset is marked by a temperature increase, moving from a chilly 45.9°F (7.7°C) in March to a mild 58.3°F (14.6°C). Weather in April »
Weather in May
May, the last month of the spring in Ontario, is a pleasant month, with an average temperature fluctuating between 51.6°F (10.9°C) and 68.9°F (20.5°C). Ontario's transition into May is marked by a rise in the average high-temperature, advancing from a refreshing 58.3°F (14.6°C) in April to an agreeable 68.9°F (20.5°C). Weather in May »
Weather in June
June, the first month of the summer in Ontario, is a moderately hot month, with an average temperature varying between 76.1°F (24.5°C) and 58.6°F (14.8°C). In Ontario, the average high-temperature in June slightly increases from an agreeable 68.9°F (20.5°C) in May to a moderately hot 76.1°F (24.5°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Ontario, Ohio, with an average temperature ranging between min 62.1°F (16.7°C) and max 79.5°F (26.4°C). July is Ontario's warmest month, registering average high temperatures of 79.5°F (26.4°C) and lows of 62.1°F (16.7°C). Weather in July »
Weather in August
August, the last month of the summer in Ontario, is also a moderately hot month, with temperature in the range of an average high of 78.3°F (25.7°C) and an average low of 60.3°F (15.7°C). The arrival of August brings an average high-temperature of a still moderately hot 78.3°F (25.7°C), closely following the temperature pattern of July. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Ontario, Ohio, with an average temperature ranging between max 72.7°F (22.6°C) and min 54.7°F (12.6°C). Ontario records a mild change in average high-temperature during September, easing from a moderately hot 78.3°F (25.7°C) in August to an agreeable 72.7°F (22.6°C). Weather in September »
Weather in October
October, the same as September, in Ontario, Ohio, is a moderate autumn month, with an average temperature ranging between max 60.6°F (15.9°C) and min 45°F (7.2°C). In Ontario, the beginning of October is marked by a lowered average high-temperature, shifting from September's agreeable 72.7°F (22.6°C) to a mild 60.6°F (15.9°C). Weather in October »
Weather in November
November, the last month of the autumn in Ontario, is also a frosty month, with an average temperature varying between 34°F (1.1°C) and 47.3°F (8.5°C). Transition from October to November is accompanied by a temperature drop, with average high-temperatures decreasing from a moderate 60.6°F (15.9°C) to a chilly 47.3°F (8.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Ontario, Ohio, with an average temperature fluctuating between 37.2°F (2.9°C) and 27.1°F (-2.7°C). In Ontario, the average high-temperature in December decreases from a frosty 47.3°F (8.5°C) in November to a cold 37.2°F (2.9°C). Weather in December »
Updated: Feb 13, 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 Ontario?
January, recording an average high temperature of 30.7°F (-0.7°C) and a low temperature of 18.3°F (-7.6°C), is Ontario's coldest month.
What is the most humid month in Ontario?
The most humid month in Ontario, Ohio, is January, with an average relative humidity of 86%.
How much does it rain in Ontario?
In Ontario, during the entire year, the rain falls for 136.4 days and collects up to 13.15" (334mm) of precipitation.
When does it snow in Ontario?
Months with snowfall in Ontario are January through April, November and December.
How many days does it snow in Ontario?
Throughout the year, in Ontario, there are 33.8 snowfall days, and 5.12" (130mm) of snow is accumulated.
What is the month with the least sunshine in Ontario?
With an average of 3.1h of sunshine, January has the least sunshine of the year in Ontario, Ohio.
What is the driest month in Ontario?
February is the month with the least rainfall. Rain falls for 6.7 days and accumulates 0.79" (20mm) of precipitation.
What is the snowiest month in Ontario?
The month with the most snowfall in Ontario is February, when snow falls for 8.3 days and typically aggregates up to 1.5" (38mm) of snow.
When is Daylight Saving Time (DST) in Ontario?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the least humid month in Ontario?
The months with the lowest humidity are April, October and November, with an average relative humidity of 78%.
What is the wettest month in Ontario?
May is the month with the most rainfall in Ontario, Ohio. Rain falls for 16.8 days and accumulates 1.61" (41mm) of precipitation.
When it does not snow in Ontario?
May through October are months without snowfall in Ontario.
When are the longest days in Ontario?
June has the longest days of the year in Ontario, with an average of 15h and 0min of daylight.
What are the months with the highest UV index in Ontario?
The months with the highest UV index are June and August, with an average maximum UV index of 6.
What is the warmest month in Ontario?
With average high and low temperatures of 79.5°F (26.4°C) and 62.1°F (16.7°C) respectively, July is Ontario's warmest month.
What are the months with the most sunshine in Ontario?
The months with the most sunshine in Ontario are July and August, with an average of 10.1h of sunshine.
What is the month with the shortest days in Ontario?
The month with the shortest days is December, with an average of 9h and 18min of daylight.
What is the month with the lowest UV index in Ontario?
With an average maximum UV index of 1, December is the month with the lowest UV index in Ontario, Ohio.
Average temperature
Ontario, OH
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (30.7°F).
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure
Ontario, OH
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.04"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Ontario, OH
- Average wind speed in January:
10.4mph - Average wind speed in February:
10mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.5mph - Average wind speed in May:
7.8mph - Average wind speed in June:
7mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.8mph - Average wind speed in September:
6.5mph - Average wind speed in October:
8.4mph - Average wind speed in November:
9.2mph - Average wind speed in December:
9.5mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity
Ontario, OH
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April, October and November (78%).
Average rainfall
Ontario, OH
- Average rainfall in January:
0.83" - Average rainfall in February:
0.79" - Average rainfall in March:
1.06" - Average rainfall in April:
1.38" - Average rainfall in May:
1.61" - Average rainfall in June:
1.46"
- Average rainfall in July:
1.22" - Average rainfall in August:
1.26" - Average rainfall in September:
0.87" - Average rainfall in October:
0.94" - Average rainfall in November:
0.91" - Average rainfall in December:
0.83"
The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days
Ontario, OH
- Average rainfall days in January:
6.5 days - Average rainfall days in February:
6.7 days - Average rainfall days in March:
11 days - Average rainfall days in April:
14.4 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
15.6 days - Average rainfall days in August:
14 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
9.9 days - Average rainfall days in November:
7.8 days - Average rainfall days in December:
7.6 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (6.5 days).
Average snowfall
Ontario, OH
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Ontario, OH
- Average snowfall days in January:
9.1 days - Average snowfall days in February:
8.3 days - Average snowfall days in March:
5.5 days - Average snowfall days in April:
1 days - Average snowfall days in May:
0.1 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:
0.3 days - Average snowfall days in November:
2.8 days - Average snowfall days in December:
6.7 days
The month with the highest number of snowfall days is January (9.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Ontario, OH
- 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 0min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 4min - 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 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
3h and 1min - Average sunshine in February:
3h and 5min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 1min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 0min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days
Ontario, OH
- Average sunshine days in January:
17.5 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
16 days - Average sunshine days in April:
13.4 days - Average sunshine days in May:
11.4 days - Average sunshine days in June:
12.4 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
12.8 days - Average sunshine days in September:
16.9 days - Average sunshine days in October:
18.4 days - Average sunshine days in November:
20.2 days - Average sunshine days in December:
18.4 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (11.4 days).
Average UV index
Ontario, OH
The months with the highest UV index are June and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Ontario, OH
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Ontario, OH
The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).