Crater Lake
Oregon, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Crater Lake, OR

A beautiful landscape of the Crater Lake in Oregon, viewed from atop the Watchman
A beautiful landscape of the Crater Lake in Oregon, viewed from atop the Watchman's Peak, under a cloudy sky
May sees ample sunshine of 10 hours as the daylight lasts for a long 15 hours. The skies are clear for extended periods, and many trails become accessible. The lake is visible from the Rim Village as the dark atmosphere clears up substantially. In Crate Lake, May receives abundant snowfall, up to 20" (508mm) and moderate rainfall to the tune of 3.2" (81.3mm). The snowplows work vigorously to clear the roads, so drive slow and allow them to pass.
Temperatures average between 28°F (-2.2°C) to 50°F (10°C), so camping is a challenge for amateurs.

What is the temperature in May in Crater Lake?

In May, in Crater Lake, Oregon, the average high-temperature is 49.3°F (9.6°C), and the average low-temperature is 28.4°F (-2°C).

How much does it rain in Crater Lake in May?

In Crater Lake, Oregon, in May, during 11.2 rainfall days, 3.6" (90.7mm) of precipitation is typically accumulated.

How many days does it snow in May in Crater Lake?

In May, in Crater Lake, Oregon, it is snowing for 5.9 days. Throughout May, 15.9" (403.9mm) of snow is accumulated.

What is the average length of the day in May in Crater Lake?

In Crater Lake, the average length of the day in May is 14.7h.

How many hours of sunshine does Crater Lake have in May?

The average sunshine in May in Crater Lake is 10h.

How high is the UV index in May in Crater Lake?

The average daily maximum UV index in May in Crater Lake is 8. A UV Index value of 8 to 10 symbolizes a very high health threat from the exposure to the Sun's UV rays.
Average temperature in May - Crater Lake, OR
  • Average high temperature in May: 49.2°F

The warmest month (with the highest average high temperature) is August (69.7°F).
The month with the lowest average high temperature is December (33.6°F).

  • Average low temperature in May: 28.4°F

Months with the highest average low temperature are July and August (40.5°F).
The coldest month (with the lowest average low temperature) is February (17.8°F).

Average rainfall in May - Crater Lake, OR
  • Average rainfall in May: 3.6"

The wettest month (with the highest rainfall) is December (11.6").
Driest months (with the lowest rainfall) are July and August (1").

Average rainfall days in May - Crater Lake, OR
  • Average rainfall days in May: 11.2 days

The month with the highest number of rainy days is March (18.2 days).
The month with the lowest number of rainy days is July (3.9 days).

Average snowfall in May - Crater Lake, OR
  • Average snowfall in May: 15.9"

The month with the highest snowfall is December (91.1").
The month with the lowest snowfall is August (0").

Average snowfall days in May - Crater Lake, OR
  • Average snowfall days in May: 5.9 days

The month with the highest number of snowfall days is December (16.4 days).
The month with the lowest number of snowfall days is August (0 days).

Average daylight in May / Average sunshine in May - Crater Lake, OR
  • Average daylight in May: 14.7h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in May: 10h

The month with most sunshine is July (Average sunshine: 12h).
Months with least sunshine are November and December (Average sunshine: 3).

Average UV index in May - Crater Lake, OR
  • Average UV index in May: 8

Months with the highest UV index are June and July (UV index 9).
The month with the lowest UV index is December (UV index 1).