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 sea temperature 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
The commencement of May sees a minor shift in the average high-temperature, moving from a refreshing 55.9°F (13.3°C) in April to a comfortable 64.8°F (18.2°C). Nighttime temperatures in Longview exhibit a substantial dip from daytime highs during May, averaging at a wintry 40.8°F (4.9°C).Humidity
In Longview, the average relative humidity in May is 78%.Rainfall
In May, the rain falls for 13.9 days. Throughout May, 1.61" (41mm) of precipitation is accumulated. Throughout the year, there are 175.5 rainfall days, and 25.83" (656mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Ocean temperature
In Longview, the average seawater temperature in May is 47.8°F (8.8°C).Note: In 47.8°F (8.8°C), cold shock and rapid breathing can occur when swimming at temperatures below 50°F (10°C).
Daylight
In Longview, the average length of the day in May is 15h and 0min.On the first day of the month, sunrise is at 5:56 am and sunset at 8:20 pm. On the last day of May, sunrise is at 5:23 am and sunset at 8:55 pm PDT.
Sunshine
The average sunshine in May is 7.9h.UV index
The average daily maximum UV index in May in Longview is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 4 in May translates into the following instructions:
Act with care - The suggestion to avoid sunburn is emphasized. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Longview?
What is the average humidity in May in Longview?
How much does it rain in Longview in May?
When it does not snow in Longview?
What is the ocean temperature in May in Longview?
How many hours of daylight does Longview have in May?
When are sunrise and sunset in May in Longview?
How many hours of sunshine does Longview have in May?
What is the UV index reading in May in Longview?
Average temperature in May
Longview, WA
- Average high temperature in May: 64.8°F
The warmest month (with the highest average high temperature) is August (77.9°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in May: 40.8°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 (32.7°F).
Average pressure in May
Longview, WA
- 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 (30.01"Hg).
Average wind speed in May
Longview, WA
- Average wind speed in May: 4.2mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in May
Longview, WA
- Average humidity in May: 78%
The months with the highest relative humidity are January, February, November and December (88%).
The month with the lowest relative humidity is July (72%).
Average rainfall in May
Longview, WA
- Average rainfall in May: 1.61"
The wettest month (with the highest rainfall) is January (3.9").
The driest month (with the least rainfall) is August (0.39").
Average rainfall days in May
Longview, WA
- Average rainfall days in May: 13.9 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is July (6.1 days).
Average snowfall in May
Longview, WA
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.26").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Longview, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in May
Longview, WA
- Average sea temperature in May: 47.8°F
The best month for swimming (with the highest average sea temperature) is September (53.8°F).
The coldest month (with the lowest average sea temperature) is February (46.6°F).
Average daylight in May /
Average sunshine in May
Longview, 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: 7h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 30min).
Average sunshine days in May
Longview, WA
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is July (22 days).
The month with the least sunshine days is March (8.9 days).
Average UV index in May
Longview, WA
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in May
Longview, WA
- Average cloud cover in May: 55
The months with the most cloud cover are February and March (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in May
Longview, WA
- Average visibility in May: 4mi
The month with the highest visibility is August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (4mi).
Longview, Washington, USA
Weather forecast for your location
2. Allow the app to use your location