May weather forecast and climate
Perris, CA

Landscape in the State Recreation Area on Lake Perris, California
Landscape in the State Recreation Area on Lake Perris, California

Weather in May

May, the last month of the spring, in Perris, is a warm month, with average temperature fluctuating between 51.3°F (10.7°C) and 74.3°F (23.5°C).

Temperature

In Perris, California, the average high-temperature is essentially the same as in April - a warm 74.3°F (23.5°C). The average low-temperature, in Perris, is 51.3°F (10.7°C).

Humidity

With an average relative humidity of 60%, May is the most humid month in Perris.

Rainfall

In Perris, it is raining for 4.6 days, with typically 0.35" (9mm) of accumulated precipitation. In Perris, during the entire year, the rain falls for 55.7 days and collects up to 7.05" (179mm) of precipitation.

Snowfall

In Perris snow does not fall in January, March through December.

Daylight

In Perris, the average length of the day is 13.9h.

Sunshine

The average sunshine in Perris is 11.4h.

UV index

In Perris, California, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the temperature in May in Perris?

In Perris, California, in May, the average high-temperature is 74.3°F (23.5°C), and the average low-temperature is 51.3°F (10.7°C).

What is the most humid month in Perris?

The most humid month in Perris, California, is May, with an average relative humidity of 60%.

What is the average humidity in May in Perris?

In Perris, California, the average relative humidity in May is 60%.

How many days does it rain in May in Perris?

In May, in Perris, California, the rain falls for 4.6 days. Throughout May, 0.35" (9mm) of precipitation is accumulated.

When it does not snow in Perris?

January, March through December are months without snowfall in Perris.

What is the average length of the day in May in Perris?

In May, the average length of the day in Perris is 13.9h.

How long on average sun shines in May in Perris?

The average sunshine in May in Perris is 11.4h.

What is the UV index reading in May in Perris?

In May, the average daily maximum UV index in Perris is 5. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in May
Perris, CA

Average temperature in May - Perris, CA
  • Average high temperature in May: 74.3°F

The warmest month (with the highest average high temperature) is August (89.6°F).
The month with the lowest average high temperature is December (61°F).

  • Average low temperature in May: 51.3°F

The month with the highest average low temperature is August (63.3°F).
The coldest month (with the lowest average low temperature) is December (43°F).

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Average pressure in May
Perris, CA

Average pressure in May - Perris, CA
  • Average pressure in May: 29.9"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in May
Perris, CA

Average wind speed in May - Perris, CA
  • Average wind speed in May: 5.3mph

The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest months (with the lowest average wind speed) are August and September (4.2mph).

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Average humidity in May
Perris, CA

Average humidity in May - Perris, CA
  • Average humidity in May: 60%

The month with the highest relative humidity is May (60%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in May
Perris, CA

Average rainfall in May - Perris, CA
  • Average rainfall in May: 0.35"

The wettest month (with the highest rainfall) is December (1.38").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in May
Perris, CA

Average rainfall days in May - Perris, CA
  • Average rainfall days in May: 4.6 days

The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is June (1.3 days).

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Average snowfall in May
Perris, CA

Average snowfall in May - Perris, CA
  • Average snowfall in May: 0"

The month with the highest snowfall is February (0.04").
Months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in May
Perris, CA

Average snowfall days in May - Perris, CA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (0.2 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in May /
Average sunshine in May
Perris, CA

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

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

  • Average sunshine in May: 11.4h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in May
Perris, CA

Average sunshine days in May - Perris, CA
  • Average sunshine days in May: 23.2 days

The month with the most sunshine days is June (26.9 days).
The month with the least sunshine days is February (21.6 days).

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Average UV index in May
Perris, CA

Average UV index in May - Perris, CA
  • Average UV index in May: 5

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in May
Perris, CA

Average cloud cover in May - Perris, CA
  • Average cloud cover in May: 17

Months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in May
Perris, CA

Average visibility in May - Perris, CA
  • Average visibility in May: 6mi

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

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