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
Astoria in May experiences a slight uptick in the average high-temperature, adjusting from April's fresh 52.3°F (11.3°C) to a mild 58.3°F (14.6°C). Throughout the month of May, Astoria witnesses an average low-temperature of 45.7°F (7.6°C).Humidity
The least humid month is May, with an average relative humidity of 81%.Rainfall
In May, in Astoria, the rain falls for 13.4 days. Throughout May, 1.97" (50mm) of precipitation is accumulated. In Astoria, during the entire year, the rain falls for 192.7 days and collects up to 40.12" (1019mm) of precipitation.Snowfall
April through November are months without snowfall.Ocean temperature
In May, the average ocean temperature is 52.7°F (11.5°C).Note: It is advised against swimming in 52.7°F (11.5°C) when it drops below 50°F (10°C). Such temperatures can cause extreme cold shock, leading to hyperventilation.
Daylight
In May, the average length of the day is 15h and 0min.On the first day of the month, sunrise is at 6:00 am and sunset at 8:24 pm. On the last day of May, sunrise is at 5:27 am and sunset at 8:59 pm PDT.
Sunshine
The average sunshine in May is 8.3h.UV index
In Astoria, the average daily maximum UV index in May is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 3 during May morphs into the following directions:
Be vigilant - Suggestions to stave off sun damage are provided. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Astoria in May?
What is the least humid month?
What is the average humidity in May?
How many days does it rain in May in Astoria?
When it does not snow in Astoria?
What is the ocean temperature in May?
How many hours of daylight does Astoria have in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Astoria have in May?
What is the UV index reading in May?
Average temperature in May
Astoria, OR
- Average high temperature in May: 58.3°F
The warmest month (with the highest average high temperature) is August (67.6°F).
The month with the lowest average high temperature is December (45.1°F).
- Average low temperature in May: 45.7°F
The month with the highest average low temperature is August (53.1°F).
The coldest month (with the lowest average low temperature) is December (38.5°F).
Average pressure in May
Astoria, OR
- Average pressure in May: 30.05"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March and September (30.02"Hg).
Average wind speed in May
Astoria, OR
- Average wind speed in May: 6.5mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in May
Astoria, OR
- Average humidity in May: 81%
The months with the highest relative humidity are January, February, March, November and December (84%).
The month with the lowest relative humidity is May (81%).
Average rainfall in May
Astoria, OR
- Average rainfall in May: 1.97"
The wettest month (with the highest rainfall) is December (6.42").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in May
Astoria, OR
- Average rainfall days in May: 13.4 days
The month with the highest number of rainy days is December (21.2 days).
The month with the least rainy days is August (7.2 days).
Average snowfall in May
Astoria, OR
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in May
Astoria, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in May
Astoria, OR
- Average sea temperature in May: 52.8°F
The best month for swimming (with the highest average sea temperature) is July (56.9°F).
The coldest month (with the lowest average sea temperature) is February (47.7°F).
Average daylight in May /
Average sunshine in May
Astoria, OR
- 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: 8h and 2min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The months with the least sunshine are January and February (Average sunshine: 3h and 48min).
Average sunshine days in May
Astoria, OR
- Average sunshine days in May: 15.1 days
The month with the most sunshine days is August (20.1 days).
The month with the least sunshine days is February (7.5 days).
Average UV index in May
Astoria, OR
- Average UV index in May: 3
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
Astoria, OR
- Average cloud cover in May: 49
The months with the most cloud cover are January and February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in May
Astoria, OR
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are July, August and September (5mi).
Astoria, Oregon, USA
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