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 56.7°F (13.7°C) in April to a still refreshing 65.1°F (18.4°C). The low-temperature averages to a chilly 45°F (7.2°C) during the nights of May.Humidity
In May, the average relative humidity is 75%.Rainfall
In Olalla, during May, the rain falls for 11.8 days and regularly aggregates up to 0.83" (21mm) of precipitation. In Olalla, during the entire year, the rain falls for 138.9 days and collects up to 12.24" (311mm) of precipitation.Snowfall
In Olalla, snow does not fall in April through October.Ocean temperature
In Olalla, in May, the average water temperature is 46.9°F (8.3°C).Note: Dipping in 46.9°F (8.3°C) at temperatures less than 50°F (10°C) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
In Olalla, the average length of the day in May is 15h and 8min.On the first day of May, sunrise is at 5:51 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 5:17 am and sunset at 8:58 pm PDT.
Sunshine
In May, the average sunshine in Olalla is 9.2h.UV index
The average daily maximum UV index in May in Olalla is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 4 during May translates into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Olalla?
What is the average humidity in May in Olalla?
How much does it rain in Olalla in May?
When it does not snow in Olalla?
What is the water temperature in May in Olalla?
How many hours of daylight does Olalla have in May?
What time are sunrise and sunset in May in Olalla?
How long on average sun shines in May in Olalla?
What is the UV index reading in May in Olalla?
Average temperature in May
Olalla, WA
- Average high temperature in May: 65.1°F
The warmest month (with the highest average high temperature) is August (77.2°F).
The month with the lowest average high temperature is December (43.2°F).
- Average low temperature in May: 45°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.9°F).
Average pressure in May
Olalla, WA
- Average pressure in May: 30.03"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 (30.01"Hg).
Average wind speed in May
Olalla, WA
- Average wind speed in May: 4.2mph
The windiest month (with the highest average wind speed) is March (5.5mph).
The calmest months (with the lowest average wind speed) are July and August (3.5mph).
Average humidity in May
Olalla, WA
- Average humidity in May: 75%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is July (69%).
Average rainfall in May
Olalla, WA
- Average rainfall in May: 0.83"
The wettest months (with the highest rainfall) are January and December (2.05").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in May
Olalla, WA
- Average rainfall days in May: 11.8 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is August (5.4 days).
Average snowfall in May
Olalla, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Olalla, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in May
Olalla, WA
- Average sea temperature in May: 46.9°F
The best month for swimming (with the highest average sea temperature) is August (53.3°F).
The coldest month (with the lowest average sea temperature) is February (45.8°F).
Average daylight in May /
Average sunshine in May
Olalla, WA
- Average daylight in May: 15h and 1min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in May: 9h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in May
Olalla, WA
- Average sunshine days in May: 16.4 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in May
Olalla, 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
Olalla, WA
- Average cloud cover in May: 42
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in May
Olalla, WA
- Average visibility in May: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).
Olalla, Washington, USA
Weather forecast for your location
2. Allow the app to use your location