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
In Hermiston, the onset of May comes with an increased average high-temperature, moving from April's enjoyable 61.5°F (16.4°C) to an agreeable 71.2°F (21.8°C). In May, Hermiston endures a notable temperature shift from day to night, with lows averaging at a frosty 49.6°F (9.8°C).Humidity
In May, the average relative humidity is 51%.Rainfall
In Hermiston, in May, during 9.1 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. In Hermiston, during the entire year, the rain falls for 109.3 days and collects up to 8.11" (206mm) of precipitation.Snowfall
In Hermiston, snow does not fall in April through August and October.Daylight
The average length of the day in May is 14h and 58min.On the first day of the month, sunrise is at 5:42 am and sunset at 8:05 pm. On the last day of May, sunrise is at 5:10 am and sunset at 8:39 pm PDT.
Sunshine
The average sunshine in May is 11.2h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 5 during May translates into the following directions:
Be vigilant - Suggestions to stave off sun damage are provided. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
How much does it rain in May?
When it does not snow?
How many hours of daylight does Hermiston have in May?
What time are sunrise and sunset in May?
How long on average sun shines in May?
What is the UV index reading in May in Hermiston?
Average temperature in May
Hermiston, OR
- Average high temperature in May: 71.2°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is December (38.8°F).
- Average low temperature in May: 49.6°F
The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).
Average pressure in May
Hermiston, OR
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in May
Hermiston, OR
- Average wind speed in May: 8.2mph
The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest month (with the lowest average wind speed) is December (6.1mph).
Average humidity in May
Hermiston, OR
- Average humidity in May: 51%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in May
Hermiston, OR
- Average rainfall in May: 0.67"
The wettest months (with the highest rainfall) are March and December (1.06").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in May
Hermiston, OR
- Average rainfall days in May: 9.1 days
The month with the highest number of rainy days is March (14.5 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in May
Hermiston, OR
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.72").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in May
Hermiston, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (3.7 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in May /
Average sunshine in May
Hermiston, OR
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in May: 11h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in May
Hermiston, OR
- Average sunshine days in May: 19.7 days
The month with the most sunshine days is July (25.5 days).
The month with the least sunshine days is February (13.3 days).
Average UV index in May
Hermiston, 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
Hermiston, OR
- Average cloud cover in May: 26
The months with the most cloud cover are January and December (Cloud cover 43).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in May
Hermiston, OR
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Hermiston, Oregon, USA
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