May weather forecast
Chehalis, WA

Share

Weather in May

The last month of the spring, May, is a refreshing month in Chehalis, Washington, with an average temperature fluctuating between 40.8°F (4.9°C) and 64.8°F (18.2°C).

Temperature

Chehalis in May observes a minor temperature shift, with average high-temperatures adjusting from a moderate 56.1°F (13.4°C) in April to a comfortable 64.8°F (18.2°C). Chehalis records a pronounced decline from the day's peak to an average nighttime low-temperature of 40.8°F (4.9°C) throughout May.

Humidity

In Chehalis, the average relative humidity in May is 78%.

Rainfall

In Chehalis, in May, it is raining for 14.6 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, there are 185.5 rainfall days, and 36.1" (917mm) of precipitation is accumulated.

Snowfall

In Chehalis, snow does not fall in April through October.

Daylight

In May, the average length of the day in Chehalis is 15h and 3min.
On the first day of the month, sunrise is at 5:55 am and sunset at 8:22 pm. On the last day of May, in Chehalis, sunrise is at 5:21 am and sunset at 8:57 pm PDT.

Sunshine

The average sunshine in May in Chehalis is 8h.

UV index

In Chehalis, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: A typical high UV index of 4 in May suggests the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
[Resources]

Frequently asked questions

What are May temperatures in Chehalis?

In May, the average high-temperature and low-temperature in Chehalis, Washington, are 64.8°F (18.2°C) and 40.8°F (4.9°C) respectively.

What is the average humidity in May in Chehalis?

In May, the average relative humidity in Chehalis is 78%.

How much does it rain in Chehalis in May?

In May, in Chehalis, the rain falls for 14.6 days. Throughout May, 2.09" (53mm) of precipitation is accumulated.

When it does not snow in Chehalis?

In Chehalis, Washington, snow does not fall in April through October.

What is the average length of the day in May in Chehalis?

In Chehalis, Washington, the average day length in May is 15h and 3min.

What time are sunrise and sunset in May in Chehalis?

In May, on the first day of the month, sunrise is at 5:55 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 5:21 am and sunset at 8:57 pm PDT.

How many hours of sunshine does Chehalis have in May?

In Chehalis, the average sunshine duration in May is 8h.

What is the UV index intensity in May in Chehalis?

In May, the average daily maximum UV index in Chehalis is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Chehalis, WA

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).

[Resources]

Average pressure in May
Chehalis, WA

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).

[Resources]

Average wind speed in May
Chehalis, WA

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).

[Resources]

Average humidity in May
Chehalis, WA

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%).

[Resources]

Average rainfall in May
Chehalis, WA

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").

[Resources]

Average rainfall days in May
Chehalis, WA

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).

[Resources]

Average snowfall in May
Chehalis, WA

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").

[Resources]

Average snowfall days in May
Chehalis, WA

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).

[Resources]

Average daylight in May /
Average sunshine in May
Chehalis, WA

Average daylight in May / Average sunshine in May - Chehalis, WA
  • Average daylight in May: 15h and 1min

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 12min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).

[Resources]

Average sunshine days in May
Chehalis, WA

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).

[Resources]

Average UV index in May
Chehalis, WA

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).

[Resources]

Average cloud cover in May
Chehalis, WA

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).

[Resources]

Average visibility in May
Chehalis, WA

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).

[Resources]

Chehalis, Washington, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location