Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
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). Ontario's May nights cool down to an average low-temperature of 51.6°F (10.9°C).Humidity
In May, the average relative humidity in Ontario is 80%.Rainfall
May is the month with the most rainfall. Rain falls for 16.8 days and accumulates 1.61" (41mm) of precipitation.Snowfall
In Ontario, Ohio, snow does not fall in May through October.Daylight
In May, the average length of the day in Ontario is 14h and 28min.On the first day of May, sunrise is at 6:27 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 8:55 pm EDT.
Sunshine
In Ontario, the average sunshine in May is 8.7h.UV index
In May, the average daily maximum UV index in Ontario is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 5 during May translates into the following directions:
Take necessary precautions - Suggestions to elude sunburn are provided. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Ontario in May?
What is the average humidity in May in Ontario?
What is the wettest month in Ontario?
How many days does it rain in May in Ontario?
When it does not snow in Ontario?
Does it snow in Ontario in May?
What is the average length of the day in May in Ontario?
What time are sunrise and sunset in May in Ontario?
How many hours of sunshine does Ontario have in May?
How high is the UV index in May in Ontario?
Average temperature in May
Ontario, OH
- Average high temperature in May: 68.9°F
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).
- Average low temperature in May: 51.6°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 in May
Ontario, OH
- Average pressure in May: 29.98"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 in May
Ontario, OH
- Average wind speed in May: 7.8mph
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 in May
Ontario, OH
- Average humidity in May: 80%
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 in May
Ontario, OH
- Average rainfall in May: 1.61"
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 in May
Ontario, OH
- Average rainfall days in May: 16.8 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 in May
Ontario, OH
- Average snowfall in May: 0"
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 in May
Ontario, OH
- Average snowfall days in May: 0.1 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 in May /
Average sunshine in May
Ontario, OH
- Average daylight in May: 14h and 3min
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 May: 8h 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 in May
Ontario, OH
- Average sunshine days in May: 11.4 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 in May
Ontario, OH
- Average UV index in May: 5
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 in May
Ontario, OH
- Average cloud cover in May: 42
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 in May
Ontario, OH
- Average visibility in May: 6mi
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).
Ontario, Ohio, USA
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