Astoria
Oregon, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Astoria, OR

A scenic seaside shot of the city of Astoria in Oregon, with a view of the iconic Astoria Megler bridge crossing over the Columbia River
A scenic seaside shot of the city of Astoria in Oregon, with a view of the iconic Astoria Megler bridge crossing over the Columbia River
The last month of the spring, May, is another mild month in Astoria, Oregon, with average temperature fluctuating between 60.4°F (15.8°C) and 45.7°F (7.6°C).

Temperature

In Astoria, the average high-temperature is relatively the same as in April - a still moderate 60.4°F (15.8°C). The average low-temperature, in Astoria, is 45.7°F (7.6°C).

Rainfall

In Astoria, Oregon, in May, it is raining for 16.4 days, with typically 3.3" (84.1mm) of accumulated precipitation. In Astoria, during the entire year, the rain falls for 191.1 days and collects up to 67.2" (1708.1mm) of precipitation.

Snowfall

In Astoria, during the entire year, snow aggregates up to 1.1" (27.9mm).

Ocean temperature

In Astoria, the average seawater temperature is 52.7°F (11.5°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

The average length of the day is 15h.

Sunshine

In May, the average sunshine is 8h.

UV index

The average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
The average daily UV index of 6 in May transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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.

What is the temperature in May in Astoria?

The average high-temperature, in May, in Astoria, is 60.4°F (15.8°C), while the average low-temperature is 45.7°F (7.6°C).

How many days does it rain in May in Astoria?

In Astoria, in May, it is raining for 16.4 days, with typically 3.3" (84.1mm) of accumulated precipitation.

What is the ocean temperature in May in Astoria?

In Astoria, Oregon, the average seawater temperature in May is 52.7°F (11.5°C). Swimming in 52.7°F (11.5°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Astoria have in May?

In Astoria, the average length of the day in May is 15h.

How many hours of sunshine does Astoria have in May?

In May, the average sunshine in Astoria is 8h.

How high is the UV index in May in Astoria?

The average daily maximum UV index in May in Astoria is 6. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to the UV radiation.
Average temperature in May - Astoria, OR
  • Average high temperature in May: 60.4°F

The warmest month (with the highest average high temperature) is August (68.7°F).
The month with the lowest average high temperature is December (48.7°F).

  • Average low temperature in May: 45.6°F

Months with the highest average low temperature are July and August (53.1°F).
The coldest month (with the lowest average low temperature) is December (36.6°F).

Average rainfall in May - Astoria, OR
  • Average rainfall in May: 3.3"

The wettest month (with the highest rainfall) is November (11.2").
The driest month (with the lowest rainfall) is July (1").

Average rainfall days in May - Astoria, OR
  • Average rainfall days in May: 16.4 days

Months with the highest number of rainy days are January and November (21.4 days).
The month with the lowest number of rainy days is August (7.4 days).

Average snowfall in May - Astoria, OR
  • Average snowfall in May: 0"

The month with the highest snowfall is January (0.5").
Months with the lowest snowfall are March, April, May, June, July, August, September and October (0").

Average snowfall days in May - Astoria, OR
  • Average snowfall days in May: 0 days

Months with the highest number of snowfall days are January and February (0.4 days).
Months with the lowest number of snowfall days are March, 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

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).

  • Average sunshine in May: 8h

The month with most sunshine is July (Average sunshine: 9h).
Months with least sunshine are November and December (Average sunshine: 2).

Average UV index in May - Astoria, OR
  • Average UV index in May: 6

The month with the highest UV index is July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).