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
May's arrival sees a rise in the average high-temperature, jumping from April's comfortable 62.2°F (16.8°C) to an agreeable 72.1°F (22.3°C). The May nights bear witness to a significant drop from the daytime highs, settling at an average temperature of 46.9°F (8.3°C).Humidity
In May, the average relative humidity is 47%.Rainfall
In Ontario, in May, it is raining for 7.8 days, with typically 0.83" (21mm) of accumulated precipitation. Throughout the year, there are 84.9 rainfall days, and 9.29" (236mm) of precipitation is accumulated.Snowfall
In Ontario, snow does not fall in May through October.Daylight
In May, the average length of the day is 14h and 47min.On the first day of the month, sunrise is at 6:37 am and sunset at 8:51 pm. On the last day of May, sunrise is at 6:07 am and sunset at 9:23 pm MDT.
Sunshine
In Ontario, the average sunshine in May is 11.3h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 5 in May suggests the following recommendations:
Be vigilant - Preventing sunburn is recommended. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
Does it snow in May?
How many hours of daylight does Ontario have in May?
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?
Average temperature in May
Ontario, OR
- Average high temperature in May: 72.1°F
The warmest month (with the highest average high temperature) is July (93.2°F).
The months with the lowest average high temperature are January and December (36.1°F).
- Average low temperature in May: 46.9°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is December (23°F).
Average pressure in May
Ontario, OR
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).
Average wind speed in May
Ontario, OR
- Average wind speed in May: 6.1mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is January (3.9mph).
Average humidity in May
Ontario, OR
- Average humidity in May: 47%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (29%).
Average rainfall in May
Ontario, OR
- Average rainfall in May: 0.83"
The wettest month (with the highest rainfall) is December (1.57").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in May
Ontario, OR
- Average rainfall days in May: 7.8 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is August (1.8 days).
Average snowfall in May
Ontario, OR
- Average snowfall in May: 0"
The month with the highest snowfall is December (5.35").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Ontario, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (7.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Ontario, OR
- Average daylight in May: 14h and 5min
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 May: 11h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in May
Ontario, OR
- Average sunshine days in May: 21.3 days
The month with the most sunshine days is July (27.7 days).
The month with the least sunshine days is February (15.2 days).
Average UV index in May
Ontario, OR
- Average UV index in May: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Ontario, OR
- Average cloud cover in May: 23
The months with the most cloud cover are January and December (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in May
Ontario, OR
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
Ontario, Oregon, USA
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