Santa Monica
California, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Santa Monica, CA

A night view of the neon-lit fun park in Santa Monica, California, with a view of the iconic Ferris wheel and pier, all reflected in the seawater below
A night view of the neon-lit fun park in Santa Monica, California, with a view of the iconic Ferris wheel and pier, all reflected in the seawater below
May, the last month of the spring, in Santa Monica, is also an enjoyable month, with average temperature varying between 64.9°F (18.3°C) and 57°F (13.9°C).

Temperature

In May, the average high-temperature is practically the same as in April - a still enjoyable 64.9°F (18.3°C). In Santa Monica, California, in May, the average low-temperature is 57°F (13.9°C).

Rainfall

In Santa Monica, in May, it is raining for 1 days, with typically 0.2" (5.3mm) of accumulated precipitation. In Santa Monica, during the entire year, the rain falls for 32.7 days and collects up to 12.8" (324.9mm) of precipitation.

Ocean temperature

January through May and December, with an average ocean temperature of 59°F (15°C), are months with the coldest seawater.
Note: For most, swimming in 59°F (15°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

The average length of the day in Santa Monica is 13.9h.

Sunshine

In Santa Monica, the average sunshine in May is 9h.

UV index

In May, the average daily maximum UV index is 9. A UV Index estimate of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 9 transform into the following instructions:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. 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 Santa Monica?

In Santa Monica, California, in May, the average high-temperature is 64.9°F (18.3°C), and the average low-temperature is 57°F (13.9°C).

How much does it rain in Santa Monica in May?

In May, in Santa Monica, the rain falls for 1 days. Throughout May, 0.2" (5.3mm) of precipitation is accumulated.

What are the months with the coldest ocean in Santa Monica?

January through May and December, with an average ocean temperature of 59°F (15°C), are months with the coldest seawater in Santa Monica, California.

How cold is the water in May in Santa Monica?

In May, the average ocean temperature in Santa Monica, California, is 59°F (15°C). Swimming in 59°F (15°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Santa Monica have in May?

In Santa Monica, California, the average length of the day in May is 13.9h.

How long on average sun shines in May in Santa Monica?

In Santa Monica, California, the average sunshine in May is 9h.

What is the UV index reading in May in Santa Monica?

In May, the average daily maximum UV index is 9. A UV Index value of 8 to 10 symbolizes a very high hazard to health from unprotected exposure to the UV radiation.
Average temperature in May - Santa Monica, CA
  • Average high temperature in May: 65°F

Warmest months (with the highest average high temperature) are August and September (71°F).
Months with the lowest average high temperature are February and March (63°F).

  • Average low temperature in May: 57°F

Months with the highest average low temperature are July, August and September (63°F).
Coldest months (with the lowest average low temperature) are January and December (51°F).

Average rainfall in May - Santa Monica, CA
  • Average rainfall in May: 0.2"

The wettest month (with the highest rainfall) is February (3.4").
Driest months (with the lowest rainfall) are June, July and August (0").

Average rainfall days in May - Santa Monica, CA
  • Average rainfall days in May: 1 days

The month with the highest number of rainy days is February (7.9 days).
The month with the lowest number of rainy days is July (0.1 days).

Average sea temperature in May - Santa Monica, CA
  • Average sea temperature in May: 59°F

Best months for swimming (with the highest average sea temperature) are August, September and October (66°F).
Coldest months (with the lowest average sea temperature) are January, February, March, April, May and December (59°F).

Average daylight in May / Average sunshine in May - Santa Monica, CA
  • Average daylight in May: 13.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).

  • Average sunshine in May: 9h

The month with most sunshine is July (Average sunshine: 12h).
Months with least sunshine are January, November and December (Average sunshine: 7).

Average UV index in May - Santa Monica, CA
  • Average UV index in May: 9

The month with the highest UV index is July (UV index 11).
Months with the lowest UV index are January and December (UV index 3).