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 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
In May, the average high-temperature slightly increases from a moderate 56.1°F (13.4°C) in April to an enjoyable 64.8°F (18.2°C). In Chehalis, in May, the average low-temperature is 40.8°F (4.9°C).Humidity
The average relative humidity in May is 78%.Rainfall
In Chehalis, Washington, in May, it is raining for 14.6 days, with typically 2.09" (53mm) of accumulated precipitation. In Chehalis, during the entire year, the rain falls for 185.5 days and collects up to 36.1" (917mm) of precipitation.Snowfall
In Chehalis, snow does not fall in April through October.Daylight
In Chehalis, the average length of the day in May is 15h and 3min.On the first day of May in Chehalis, sunrise is at 5:56 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:22 am and sunset at 8:56 pm PDT.
Sunshine
In May, the average sunshine in Chehalis is 8h.UV index
In Chehalis, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 4 in May interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
FAQ
What is the temperature in May in Chehalis?
What is the average humidity in May in Chehalis?
How many days does it rain in May in Chehalis?
When it does not snow in Chehalis?
What is the average length of the day in May in Chehalis?
What time are sunrise and sunset in May in Chehalis?
How many hours of sunshine does Chehalis have in May?
How high is the UV index in May in Chehalis?
Average temperature in May
Chehalis, WA
- Average high temperature in May: 64.8°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in May: 40.8°F
The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).
Average pressure in May
Chehalis, 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
Chehalis, 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
Chehalis, WA
- Average humidity in May: 78%
The months with the highest relative humidity are January, February, November and December (89%).
The month with the lowest relative humidity is July (73%).
Average rainfall in May
Chehalis, WA
- Average rainfall in May: 2.09"
The wettest month (with the highest rainfall) is January (5.51").
The driest month (with the least rainfall) is July (0.47").
Average rainfall days in May
Chehalis, WA
- Average rainfall days in May: 14.6 days
The month with the highest number of rainy days is March (21.5 days).
The month with the least rainy days is August (6.4 days).
Average snowfall in May
Chehalis, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Chehalis, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (3.5 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
Chehalis, WA
- Average daylight in May: 15h and 3min
The month with the longest days is June (Average daylight: 15h and 47min).
The month with the shortest days is December (Average daylight: 8h and 38min).
- Average sunshine in May: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in May
Chehalis, WA
- Average sunshine days in May: 15 days
The months with the most sunshine days are July and August (20.8 days).
The month with the least sunshine days is February (7.6 days).
Average UV index in May
Chehalis, WA
- 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
Chehalis, WA
- Average cloud cover in May: 55
The months with the most cloud cover are January, February and December (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in May
Chehalis, WA
- Average visibility in May: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
Weather forecast for your location
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