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
With the onset of May, Richland's average high-temperature experiences a rise, moving from April's comfortable 63.3°F (17.4°C) to a pleasant 73°F (22.8°C). A dramatic downturn marks the May nights in Richland, with lows averaging at a cool 50.7°F (10.4°C).Humidity
In Richland, the average relative humidity in May is 48%.Rainfall
In Richland, in May, during 8.8 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. In Richland, during the entire year, the rain falls for 100.2 days and collects up to 7.05" (179mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Richland, the average length of the day in May is 15h and 1min.On the first day of May in Richland, sunrise is at 5:41 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 5:08 am and sunset at 8:41 pm PDT.
Sunshine
In Richland, Washington, the average sunshine in May is 11.1h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: In May, the maximum UV index of 5 suggests this advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
What are the temperatures in Richland in May?
What is the average humidity in May in Richland?
How many days does it rain in May in Richland?
When it does not snow in Richland?
How many hours of daylight does Richland have in May?
When are sunrise and sunset in May in Richland?
How many hours of sunshine does Richland have in May?
What is the UV index intensity in May in Richland?
Average temperature in May
Richland, WA
- Average high temperature in May: 73°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (38.1°F).
- Average low temperature in May: 50.7°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (27.5°F).
Average pressure in May
Richland, WA
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in May
Richland, WA
- Average wind speed in May: 7.3mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is December (5.6mph).
Average humidity in May
Richland, WA
- Average humidity in May: 48%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is July (35%).
Average rainfall in May
Richland, WA
- Average rainfall in May: 0.67"
The wettest month (with the highest rainfall) is December (0.94").
The driest months (with the least rainfall) are July and September (0.2").
Average rainfall days in May
Richland, WA
- Average rainfall days in May: 8.8 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is July (3.5 days).
Average snowfall in May
Richland, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Richland, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (3.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Richland, WA
- 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 July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in May
Richland, WA
- Average sunshine days in May: 19.8 days
The month with the most sunshine days is July (25.7 days).
The months with the least sunshine days are February and March (15.3 days).
Average UV index in May
Richland, WA
- 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
Richland, WA
- Average cloud cover in May: 25
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in May
Richland, WA
- 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).
Richland, Washington, USA
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