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 brings a temperature change, with average high-temperatures moving from April's fresh 50.5°F (10.3°C) to a refreshing 60.8°F (16°C). Despite drastic daily temperature oscillations, Richland cools down to an average low-temperature of 38.3°F (3.5°C) in May.Humidity
In Richland, the average relative humidity in May is 63%.Rainfall
In Richland, in May, it is raining for 13.3 days, with typically 1.22" (31mm) of accumulated precipitation. Throughout the year, there are 113.5 rainfall days, and 12.56" (319mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Richland. May is the last month it regularly snows. During 0.4 snowfall days, in May, Richland aggregates 0.24" (6mm) of snow. In Richland, during the entire year, snow falls for 65.1 days and aggregates up to 38.9" (988mm) of snow.Daylight
In Richland, the average length of the day in May is 14h and 51min.On the first day of the month, sunrise is at 5:37 am and sunset at 7:54 pm. On the last day of May, sunrise is at 5:06 am and sunset at 8:27 pm PDT.
Sunshine
In May, the average sunshine is 11.1h.UV index
In May, the average daily maximum UV index in Richland, Oregon, is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 4 during May translates into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Richland have in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Richland, OR
- Average high temperature in May: 60.8°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (30.7°F).
- Average low temperature in May: 38.3°F
The month with the highest average low temperature is August (53.8°F).
The coldest month (with the lowest average low temperature) is December (18.5°F).
Average pressure in May
Richland, OR
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in May
Richland, OR
- Average wind speed in May: 5.7mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are September and October (5.4mph).
Average humidity in May
Richland, OR
- Average humidity in May: 63%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is August (40%).
Average rainfall in May
Richland, OR
- Average rainfall in May: 1.22"
The wettest month (with the highest rainfall) is December (1.77").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in May
Richland, OR
- Average rainfall days in May: 13.3 days
The month with the highest number of rainy days is March (15.6 days).
The month with the least rainy days is August (4.4 days).
Average snowfall in May
Richland, OR
- Average snowfall in May: 0.24"
The month with the highest snowfall is December (10.59").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Richland, OR
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is December (14.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Richland, OR
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 11h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in May
Richland, OR
- Average sunshine days in May: 14.3 days
The month with the most sunshine days is July (22.7 days).
The months with the least sunshine days are February and March (11.3 days).
Average UV index in May
Richland, OR
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Richland, OR
- Average cloud cover in May: 27
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in May
Richland, OR
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
Richland, Oregon, USA
Weather forecast for your location
2. Allow the app to use your location
