May weather forecast and climate
Mount Shasta, CA

The Lake Siskiyou on the base of Mount Shasta in California, and a view of the planted forest, the far suspension bridge, and snowy mountain peak
The Lake Siskiyou on the base of Mount Shasta in California, and a view of the planted forest, the far suspension bridge, and snowy mountain peak

Weather in May

May, the last month of the spring, in Mount Shasta, is an enjoyable month, with average temperature ranging between min 39.2°F (4°C) and max 63.3°F (17.4°C).

Temperature

In Mount Shasta, the average high-temperature rises, from a cool 54°F (12.2°C) in April, to an enjoyable 63.3°F (17.4°C). In Mount Shasta, California, in May, the average low-temperature is 39.2°F (4°C).

Humidity

In Mount Shasta, the average relative humidity in May is 65%.

Rainfall

In May, in Mount Shasta, the rain falls for 10.4 days. Throughout May, 1.89" (48mm) of precipitation is accumulated. In Mount Shasta, during the entire year, the rain falls for 90.7 days and collects up to 26.38" (670mm) of precipitation.

Snowfall

Months with snowfall in Mount Shasta, California, are January through May, September through December. May is the last month it regularly snows. During 0.9 snowfall days, in May, Mount Shasta aggregates 0.59" (15mm) of snow. In Mount Shasta, during the entire year, snow falls for 50.2 days, and aggregates up to 81.42" (2068mm) of snow.

Daylight

In Mount Shasta, the average length of the day is 14.5h.

Sunshine

The average sunshine is 10.9h.

UV index

In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in May in Mount Shasta?

The average high-temperature, in May, is 63.3°F (17.4°C), while the average low-temperature is 39.2°F (4°C).

What is the average humidity in May in Mount Shasta?

In May, the average relative humidity is 65%.

How much does it rain in Mount Shasta in May?

In Mount Shasta, during May, the rain falls for 10.4 days and regularly aggregates up to 1.89" (48mm) of precipitation.

What is the last month it snows in Mount Shasta?

May is the last month it regularly snows in Mount Shasta. During 0.9 snowfall days, in May, Mount Shasta aggregates 0.59" (15mm) of snow.

How many hours of daylight does Mount Shasta have in May?

In Mount Shasta, California, the average length of the day in May is 14.5h.

How long on average sun shines in May in Mount Shasta?

In May, the average sunshine in Mount Shasta is 10.9h.

How high is the UV index in May in Mount Shasta?

In May, the average daily maximum UV index in Mount Shasta is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in May
Mount Shasta, CA

Average temperature in May - Mount Shasta, CA
  • Average high temperature in May: 63.3°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (40.8°F).

  • Average low temperature in May: 39.2°F

The month with the highest average low temperature is July (52.2°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).

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Average pressure in May
Mount Shasta, CA

Average pressure in May - Mount Shasta, CA
  • Average pressure in May: 29.97"

The month with the highest atmospheric pressure is January (30.17").
Months with the lowest atmospheric pressure are June and August (29.94").

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Average wind speed in May
Mount Shasta, CA

Average wind speed in May - Mount Shasta, CA
  • Average wind speed in May: 5mph

The windiest month (with the highest average wind speed) is March (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).

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Average humidity in May
Mount Shasta, CA

Average humidity in May - Mount Shasta, CA
  • Average humidity in May: 65%

The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is August (45%).

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Average rainfall in May
Mount Shasta, CA

Average rainfall in May - Mount Shasta, CA
  • Average rainfall in May: 1.89"

The wettest month (with the highest rainfall) is March (4.69").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in May
Mount Shasta, CA

Average rainfall days in May - Mount Shasta, CA
  • Average rainfall days in May: 10.4 days

The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (2.3 days).

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Average snowfall in May
Mount Shasta, CA

Average snowfall in May - Mount Shasta, CA
  • Average snowfall in May: 0.59"

The month with the highest snowfall is January (19.21").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Mount Shasta, CA

Average snowfall days in May - Mount Shasta, CA
  • Average snowfall days in May: 0.9 days

The month with the highest number of snowfall days is December (10.9 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight in May /
Average sunshine in May
Mount Shasta, CA

Average daylight in May / Average sunshine in May - Mount Shasta, CA
  • Average daylight in May: 14.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in May: 10.9h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.4h).

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Average sunshine days in May
Mount Shasta, CA

Average sunshine days in May - Mount Shasta, CA
  • Average sunshine days in May: 19.3 days

Months with the most sunshine days are July and August (25.7 days).
The month with the least sunshine days is March (12.3 days).

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Average UV index in May
Mount Shasta, CA

Average UV index in May - Mount Shasta, CA
  • Average UV index in May: 4

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in May
Mount Shasta, CA

Average cloud cover in May - Mount Shasta, CA
  • Average cloud cover in May: 26

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in May
Mount Shasta, CA

Average visibility in May - Mount Shasta, CA
  • Average visibility in May: 6mi

Months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January, February, March and December (5mi).

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