Expand
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 Ontario, New York, with an average temperature fluctuating between 20.8°F (-6.2°C) and 29.7°F (-1.3°C). January brings the lowest temperatures, with an average high of 29.7°F (-1.3°C) and an average low of 20.8°F (-6.2°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 fluctuating between 22.3°F (-5.4°C) and 31.6°F (-0.2°C). The shift into February finds Ontario at an average high-temperature of a still freezing cold 31.6°F (-0.2°C), closely comparable to January's conditions. Weather in February »
Weather in March
The first month of the spring, March, is a cold month in Ontario, New York, with an average temperature fluctuating between 29.3°F (-1.5°C) and 38.8°F (3.8°C). The arrival of March introduces a minor uplift in high-temperatures, adjusting from a subzero cold 31.6°F (-0.2°C) in February to a wintry 38.8°F (3.8°C). Weather in March »
Weather in April
April is a chilly spring month in Ontario, New York, with temperature in the range of an average high of 49.5°F (9.7°C) and an average low of 37.9°F (3.3°C). As Ontario, New York, transitions into April, the average high-temperature is observed to rise from a wintry 38.8°F (3.8°C) in March to a frosty 49.5°F (9.7°C). Weather in April »
Weather in May
May, the last month of the spring in Ontario, is a moderate month, with an average temperature varying between 48.6°F (9.2°C) and 60.6°F (15.9°C). May's arrival coincides with a rise in the average high-temperature, moving from April's frosty 49.5°F (9.7°C) to a refreshing 60.6°F (15.9°C). Weather in May »
Weather in June
The first month of the summer, June, is a pleasant month in Ontario, New York, with an average temperature varying between 57.4°F (14.1°C) and 68.9°F (20.5°C). The start of June is characterized by a subtle increase in the average high-temperature, transitioning from a moderate 60.6°F (15.9°C) in May to an agreeable 68.9°F (20.5°C). Weather in June »
Weather in July
July in Ontario, New York, is a warm summer month, with an average temperature ranging between max 76.5°F (24.7°C) and min 64.9°F (18.3°C). The temperatures reach their highest averages in July, with highs of 76.5°F (24.7°C) and lows of 64.9°F (18.3°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Ontario, New York, with temperature in the range of an average low of 64.4°F (18°C) and an average high of 75.9°F (24.4°C). The onset of August brings an average high-temperature of a still warm 75.9°F (24.4°C), nearly matching the July temperature. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Ontario, New York, with an average temperature fluctuating between 58.3°F (14.6°C) and 70.3°F (21.3°C). September indicates a minor shift in the average high-temperature, from August's moderately hot 75.9°F (24.4°C) to a pleasant 70.3°F (21.3°C). Weather in September »
Weather in October
October, the same as September, in Ontario, New York, is another mild autumn month, with an average temperature ranging between min 48.2°F (9°C) and max 58.1°F (14.5°C). The onset of October introduces a moderate change in Ontario's weather, with average high-temperatures falling from September's pleasant 70.3°F (21.3°C) to a moderate 58.1°F (14.5°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 fluctuating between 45.9°F (7.7°C) and 36.7°F (2.6°C). The start of November comes with a reduction in the average high-temperature, receding from a moderate 58.1°F (14.5°C) in October to a chilly 45.9°F (7.7°C). Weather in November »
Weather in December
December, the first month of the winter in Ontario, is still a cold month, with an average temperature varying between 28.6°F (-1.9°C) and 36.3°F (2.4°C). The arrival of December corresponds with a shift in temperature, down from a frosty 45.9°F (7.7°C) in November to an icy 36.3°F (2.4°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 time of the year is the coldest in Ontario?
In Ontario, January is the month with the lowest recorded average temperatures, measuring a high of 29.7°F (-1.3°C) and a low of 20.8°F (-6.2°C).
What are the most humid months in Ontario?
January and February, with an average relative humidity of 83%, are most humid months in Ontario.
How many days does it rain in Ontario?
In Ontario, New York, during the entire year, the rain falls for 167.9 days and collects up to 31.18" (792mm) 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?
Throughout the year, there are 62.3 snowfall days, and 20.63" (524mm) of snow is accumulated.
What is the month with the least sunshine in Ontario?
The month with the least sunshine in Ontario is January, with an average of 2.6h of sunshine.
What are the months with the lowest UV index in Ontario?
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Ontario.
What is the snowiest month in Ontario?
The month with the most snowfall is February, when snow falls for 14.2 days and typically aggregates up to 5.98" (152mm) 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, New York, 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.
When it does not snow in Ontario?
June through September are months without snowfall in Ontario.
When are the longest days in Ontario?
With an average of 15h and 18min of daylight, June has the longest days of the year in Ontario, New York.
What are the warmest months in Ontario?
July temperatures in Ontario tend to peak at an average high of 76.5°F (24.7°C) and dip to a low of 64.9°F (18.3°C).
What month has the most sunshine in Ontario?
The month with the most sunshine is July, with an average of 10.7h of sunshine.
What is the month with the highest UV index in Ontario?
The months with the highest UV index in Ontario, New York, are July and August, with an average maximum UV index of 6.
What are the least humid months in Ontario?
August and September, with an average relative humidity of 75%, are the least humid months in Ontario, New York.
What is the driest month in Ontario?
September is the month with the least rainfall. Rain falls for 14.2 days and accumulates 2.01" (51mm) of precipitation.
What is the rainiest month in Ontario?
The month with the most rainfall in Ontario, New York, is October, when the rain falls for 17.3 days and typically aggregates up to 3.23" (82mm) of precipitation.
What is the month with the shortest days in Ontario?
December has the shortest days of the year in Ontario, with an average of 9h and 0min of daylight.
Average temperature
Ontario, NY
The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is January (29.7°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure
Ontario, NY
- Average pressure in January:
30.04"Hg - Average pressure in February:
30.03"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Ontario, NY
- Average wind speed in January:
13.2mph - Average wind speed in February:
13mph - Average wind speed in March:
11.8mph - Average wind speed in April:
11.6mph - Average wind speed in May:
8.8mph - Average wind speed in June:
8.1mph
- Average wind speed in July:
7.7mph - Average wind speed in August:
8.3mph - Average wind speed in September:
8.8mph - Average wind speed in October:
11.1mph - Average wind speed in November:
11.9mph - Average wind speed in December:
12.4mph
The windiest month (with the highest average wind speed) is January (13.2mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity
Ontario, NY
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are August and September (75%).
Average rainfall
Ontario, NY
- Average rainfall in January:
2.05" - Average rainfall in February:
2.2" - Average rainfall in March:
2.17" - Average rainfall in April:
2.87" - Average rainfall in May:
3.15" - Average rainfall in June:
2.76"
- Average rainfall in July:
2.64" - Average rainfall in August:
3.03" - Average rainfall in September:
2.01" - Average rainfall in October:
3.23" - Average rainfall in November:
2.4" - Average rainfall in December:
2.68"
The wettest month (with the highest rainfall) is October (3.23").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days
Ontario, NY
- Average rainfall days in January:
8.5 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
11.7 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
18.3 days - Average rainfall days in August:
18.2 days - Average rainfall days in September:
14.2 days - Average rainfall days in October:
17.3 days - Average rainfall days in November:
12.6 days - Average rainfall days in December:
10.7 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (7.8 days).
Average snowfall
Ontario, NY
- Average snowfall in January:
4.41" - Average snowfall in February:
5.98" - Average snowfall in March:
1.93" - Average snowfall in April:
1.18" - Average snowfall in May:
0.35" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Ontario, NY
- Average snowfall days in January:
15.4 days - Average snowfall days in February:
14.2 days - Average snowfall days in March:
10.1 days - Average snowfall days in April:
3.1 days - Average snowfall days in May:
0.4 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:
0.5 days - Average snowfall days in November:
5.8 days - Average snowfall days in December:
12.8 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Ontario, NY
- 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 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 0min - 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 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
2h and 4min - Average sunshine in February:
2h and 4min - Average sunshine in March:
5h and 2min - Average sunshine in April:
7h and 4min - Average sunshine in May:
9h and 2min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 3min - Average sunshine in September:
9h and 2min - Average sunshine in October:
4h and 5min - Average sunshine in November:
4h and 2min - Average sunshine in December:
3h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days
Ontario, NY
- Average sunshine days in January:
7.4 days - Average sunshine days in February:
7.3 days - Average sunshine days in March:
10.2 days - Average sunshine days in April:
10.8 days - Average sunshine days in May:
12.4 days - Average sunshine days in June:
12.5 days
- Average sunshine days in July:
11.1 days - Average sunshine days in August:
10.7 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
10.1 days - Average sunshine days in November:
11.2 days - Average sunshine days in December:
8.1 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (7.3 days).
Average UV index
Ontario, NY
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Ontario, NY
The month with the most cloud cover is January (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility
Ontario, NY
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Ontario, New York, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location