May weather forecastVernonia, OR
May
Weather in May
May, the last month of the spring in Vernonia, is a refreshing month, with an average temperature fluctuating between 63.5°F (17.5°C) and 41°F (5°C).Temperature
Observing a minor shift, the average high-temperature during May adjusts from April's cool 55°F (12.8°C) to a refreshing 63.5°F (17.5°C). Vernonia receives a consistent average low-temperature of 41°F (5°C) in May, a substantial dip from the day's heat.Humidity
In May, the average relative humidity is 79%.Rainfall
In May, the rain falls for 14.6 days. Throughout May, 2.17" (55mm) of precipitation is accumulated. Throughout the year, there are 184.4 rainfall days, and 36.61" (930mm) of precipitation is accumulated.Snowfall
In Vernonia, snow does not fall in May through October.Daylight
The average length of the day in May in Vernonia, Oregon, is 14h and 58min.On the first day of May, sunrise is at 5:58 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:26 am and sunset at 8:55 pm PDT.
Sunshine
The average sunshine in May is 7.6h.UV index
In Vernonia, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 4 during May translates into the following guidance:
Heed the precautions - Suggestions to avoid sunburn are made. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Vernonia, OR
- Average high temperature in May: 63.5°F
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is December (42.1°F).
- Average low temperature in May: 41°F
The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure in May
Vernonia, OR
- Average pressure in May: 30.04"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.02"Hg).
Average wind speed in May
Vernonia, OR
- Average wind speed in May: 4.3mph
The windiest months (with the highest average wind speed) are January, March and November (4.8mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in May
Vernonia, OR
- Average humidity in May: 79%
The month with the highest relative humidity is November (89%).
The month with the lowest relative humidity is July (73%).
Average rainfall in May
Vernonia, OR
- Average rainfall in May: 2.17"
The wettest month (with the highest rainfall) is January (5.79").
The driest months (with the least rainfall) are July and August (0.51").
Average rainfall days in May
Vernonia, OR
- Average rainfall days in May: 14.6 days
The month with the highest number of rainy days is March (21.7 days).
The month with the least rainy days is July (6 days).
Average snowfall in May
Vernonia, OR
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.94").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Vernonia, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (4.4 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
Vernonia, 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: 7h and 36min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).
Average sunshine days in May
Vernonia, OR
- Average sunshine days in May: 15.2 days
The month with the most sunshine days is July (22.1 days).
The months with the least sunshine days are February and March (7.6 days).
Average UV index in May
Vernonia, OR
- Average UV index in May: 4
The month with the highest UV index is 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
Vernonia, OR
- Average cloud cover in May: 55
The months with the most cloud cover are February and March (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in May
Vernonia, OR
- Average visibility in May: 4mi
The months with the highest visibility are July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (4mi).
