May weather forecastVancouver, WA
May
Weather in May
In May, the weather of Vancouver, Washington transforms almost overnight into that of summer, even though the calendar might suggest otherwise. With the warm climate settling in, there is often an air of cordiality and anticipation that permeates the city's streets. The generally favourable weather allows for outdoor events to be enjoyed without the threat of sudden weather changes. However, caution continues to be exercised given the presence of light showers, as the city records an average rainfall of 1.85" (47mm). Despite this, its limited number of rainy days suggests showers are intermittent rather than continuous.Temperature
As May begins, there's a slight increase in the average high-temperature, moving from a moderate 58.1°F (14.5°C) in April to an enjoyable 66.6°F (19.2°C). With the onset of night in May, Vancouver reveals a significant decrease in temperature, averaging at a frosty 43.7°F (6.5°C).Humidity
In Vancouver, the average relative humidity in May is 73%.Rainfall
In May, the rain falls for 13.8 days. Throughout May, 1.85" (47mm) of precipitation is accumulated. In Vancouver, during the entire year, the rain falls for 177.1 days and collects up to 34.29" (871mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In May, the average length of the day is 14h and 56min.On the first day of May, sunrise is at 5:56 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 5:24 am and sunset at 8:52 pm PDT.
Sunshine
In May, the average sunshine is 8.8h.UV index
The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: During May, 4 as the daily maximum UV index converts into the following advice:
Act with care - The suggestion to avoid sunburn is emphasized. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Vancouver, WA
- Average high temperature in May: 66.6°F
The warmest month (with the highest average high temperature) is August (80.6°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in May: 43.7°F
The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is December (34°F).
Average pressure in May
Vancouver, WA
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in May
Vancouver, WA
- Average wind speed in May: 4.1mph
The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in May
Vancouver, WA
- Average humidity in May: 73%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (65%).
Average rainfall in May
Vancouver, WA
- Average rainfall in May: 1.85"
The wettest month (with the highest rainfall) is December (5.08").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in May
Vancouver, WA
- Average rainfall days in May: 13.8 days
The month with the highest number of rainy days is March (20.6 days).
The month with the least rainy days is August (4.9 days).
Average snowfall in May
Vancouver, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.42").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Vancouver, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.1 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
Vancouver, WA
- Average daylight in May: 14h and 54min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 8h and 48min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The months with the least sunshine are January and February (Average sunshine: 4h and 6min).
Average sunshine days in May
Vancouver, WA
- Average sunshine days in May: 15.6 days
The month with the most sunshine days is July (24.1 days).
The month with the least sunshine days is February (7.9 days).
Average UV index in May
Vancouver, WA
- Average UV index in May: 4
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
Vancouver, WA
- Average cloud cover in May: 46
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in May
Vancouver, WA
- Average visibility in May: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
