May weather forecastPomona, WA
May
Weather in May
May, the last month of the spring in Pomona, is an enjoyable month, with an average temperature ranging between min 46.2°F (7.9°C) and max 67.8°F (19.9°C).Temperature
May's arrival sees a rise in the average high-temperature, jumping from April's mild 57.4°F (14.1°C) to a comfortable 67.8°F (19.9°C). During May, Pomona witnesses a consistent average low-temperature of 46.2°F (7.9°C).Humidity
In Pomona, the average relative humidity in May is 53%.Rainfall
In May, the rain falls for 7.5 days. Throughout May, 0.67" (17mm) of precipitation is accumulated. Throughout the year, there are 87.6 rainfall days, and 5.94" (151mm) of precipitation is accumulated.Snowfall
In Pomona, snow does not fall in May through August and October.Daylight
In May, the average length of the day is 15h and 4min.On the first day of May, sunrise is at 5:45 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 5:11 am and sunset at 8:47 pm PDT.
Sunshine
The average sunshine in May is 11.4h.UV index
The average daily maximum UV index in May in Pomona is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The UV index of 5 in May translates into these instructions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Pomona, WA
- Average high temperature in May: 67.8°F
The warmest month (with the highest average high temperature) is August (85.1°F).
The month with the lowest average high temperature is December (36°F).
- Average low temperature in May: 46.2°F
The month with the highest average low temperature is August (58.8°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).
Average pressure in May
Pomona, WA
- Average pressure in May: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in May
Pomona, WA
- Average wind speed in May: 6.9mph
The windiest month (with the highest average wind speed) is June (7.4mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).
Average humidity in May
Pomona, WA
- Average humidity in May: 53%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (41%).
Average rainfall in May
Pomona, WA
- Average rainfall in May: 0.67"
The wettest month (with the highest rainfall) is December (0.87").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in May
Pomona, WA
- Average rainfall days in May: 7.5 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is July (2.3 days).
Average snowfall in May
Pomona, WA
- Average snowfall in May: 0"
The month with the highest snowfall is December (3.07").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in May
Pomona, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (5.7 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in May /
Average sunshine in May
Pomona, WA
- Average daylight in May: 15h and 6min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in May: 11h and 24min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in May
Pomona, WA
- Average sunshine days in May: 20.3 days
The month with the most sunshine days is July (27.6 days).
The month with the least sunshine days is February (15.5 days).
Average UV index in May
Pomona, WA
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Pomona, WA
- Average cloud cover in May: 22
The month with the most cloud cover is January (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in May
Pomona, WA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
