May weather forecast
Crater Lake, OR

May brings a significant change in Crater Lake's weather with a substantial reduction in snowfall, reaching as low as 15.9" (404mm). The warmer temperatures of spring firmly take root, melting away the remnants of the winter snow. Days get longer, blessing the place with plenty of sunshine that illuminates the vibrant greenery. Rainfall remains consistent, but the frequency lessens, making way for more bright and sunny days. Crater Lake, in its spring glory, becomes a mesmerizing sight to behold.

Temperature

The beginning of May marks a minor shift in the average high-temperature, moving from April's cold 41.7°F (5.4°C) to a chilly 49.3°F (9.6°C). Crater Lake's temperature in May lowers to a consistent average of 28.4°F (-2°C) during the nights.

Rainfall

In Crater Lake, Oregon, during May, the rain falls for 11.2 days and regularly aggregates up to 3.58" (91mm) of precipitation. Throughout the year, in Crater Lake, there are 145.9 rainfall days, and 66.22" (1682mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Crater Lake are January through July, September through December. In Crater Lake, in May, during 5.9 snowfall days, 15.91" (404mm) of snow is typically accumulated. Throughout the year, in Crater Lake, there are 101.3 snowfall days, and 482.48" (12255mm) of snow is accumulated.

Daylight

The average length of the day in May is 14h and 40min.
On the first day of the month, sunrise is at 6:01 am and sunset at 8:09 pm. On the last day of May, sunrise is at 5:32 am and sunset at 8:40 pm PDT.

Sunshine

In Crater Lake, the average sunshine in May is 10h.

UV index

In Crater Lake, the average daily maximum UV index in May is 8. A UV Index value of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV rays for average individuals.
Note: A maximum high UV index of 8 in May translates into the following recommendations:
Ensure safety measures are in place, as skin and eyes are vulnerable to quick damage. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.