May weather forecastRochester, WA
May
Weather in May
May, the last month of the spring in Rochester, is an enjoyable month, with an average temperature varying between 41.2°F (5.1°C) and 64.9°F (18.3°C).Temperature
The shift from April to May introduces a subtle increase in the average high-temperature, moving from a moderate 56.7°F (13.7°C) to a comfortable 64.9°F (18.3°C). Rochester reports a sharp reduction in temperature during May, averaging at a wintry 41.2°F (5.1°C) at night.Humidity
In Rochester, the average relative humidity in May is 78%.Rainfall
In May, the rain falls for 13.4 days. Throughout May, 1.34" (34mm) of precipitation is accumulated. Throughout the year, there are 168 rainfall days, and 23.94" (608mm) of precipitation is accumulated.Snowfall
In Rochester, snow does not fall in April through October.Daylight
In May, the average length of the day is 15h and 4min.On the first day of the month, sunrise is at 5:55 am and sunset at 8:23 pm. On the last day of May, sunrise is at 5:21 am and sunset at 8:58 pm PDT.
Sunshine
In Rochester, the average sunshine in May is 8h.UV index
In Rochester, Washington, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 4 during May translates into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Rochester, WA
- Average high temperature in May: 64.9°F
The warmest month (with the highest average high temperature) is August (77.4°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in May: 41.2°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).
Average pressure in May
Rochester, WA
- Average pressure in May: 30.04"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.02"Hg).
Average wind speed in May
Rochester, WA
- Average wind speed in May: 4mph
The windiest months (with the highest average wind speed) are January, March and November (4.5mph).
The calmest month (with the lowest average wind speed) is September (3.6mph).
Average humidity in May
Rochester, WA
- Average humidity in May: 78%
The month with the highest relative humidity is November (90%).
The month with the lowest relative humidity is July (73%).
Average rainfall in May
Rochester, WA
- Average rainfall in May: 1.34"
The wettest month (with the highest rainfall) is January (3.86").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in May
Rochester, WA
- Average rainfall days in May: 13.4 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (5.6 days).
Average snowfall in May
Rochester, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Rochester, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.7 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
Rochester, 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: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in May
Rochester, WA
- Average sunshine days in May: 14.8 days
The month with the most sunshine days is August (20.9 days).
The months with the least sunshine days are February and March (9.3 days).
Average UV index in May
Rochester, WA
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Rochester, WA
- Average cloud cover in May: 55
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in May
Rochester, WA
- Average visibility in May: 4mi
The month with the highest visibility is July (5mi).
The months with the lowest visibility are January, February, March, April, May, June, August, September, October, November and December (4mi).
