May weather forecast
Irvine, CA

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The neon-lit city of Irvine in California, with highway lights and the distant hill ranges and skyscape
The neon-lit city of Irvine in California, with highway lights and the distant hill ranges and skyscape

Weather in May

May in Irvine signals the onset of summer with temperatures consistently on rise. Stepping into the warmer months, this city exhibits less rainfall, giving ample sunshine to the urban dweller. The decrease in average rainfall from April to May of 0.31" (8mm) makes room for more outdoor endeavors. The sight of the city illuminated by rays of the sun is a picturesque view often associated with May. Enjoyment of the sunny skies and longer days signifies the initial excitement of summer.

Temperature

The onset of May brings with it an average high-temperature of a still agreeable 69.8°F (21°C), showing a negligible variation from the month before. An average low-temperature of 56.3°F (13.5°C) marks the month of May.

Humidity

In Irvine, the average relative humidity in May is 69%.

Rainfall

In May, the rain falls for 5.4 days. Throughout May, 0.31" (8mm) of precipitation is accumulated. In Irvine, during the entire year, the rain falls for 63.7 days and collects up to 7.91" (201mm) of precipitation.

Daylight

In Irvine, the average length of the day in May is 13h and 55min.
On the first day of May, sunrise is at 6:01 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 7:56 pm PDT.

Sunshine

In May, the average sunshine is 11.1h.

UV index

In Irvine, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: In May, the maximum UV index of 5 suggests these recommendations:
Take precautions - Protection against skin and eye damage is obliged. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Updated: Jun 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average May temperature?

The high-temperature, in May, in Irvine, is 69.8°F (21°C), while the low-temperature averages to 56.3°F (13.5°C).

What is the average humidity in May?

The average relative humidity in May is 69%.

How many days does it rain in May?

In Irvine, during May, the rain falls for 5.4 days and regularly aggregates up to 0.31" (8mm) of precipitation.

How many hours of daylight does Irvine have in May?

In May, the average day length is 13h and 55min.

What time are sunrise and sunset in May?

On the first day of May, sunrise is at 6:01 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 7:56 pm PDT.

How many hours of sunshine does Irvine have in May?

In Irvine, the average sunshine duration in May is 11.1h.

What is the UV index reading in May?

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Irvine, CA

Average temperature in May - Irvine, CA
  • Average high temperature in May: 69.8°F

The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is December (63°F).

  • Average low temperature in May: 56.3°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (50.5°F).

Average pressure in May
Irvine, CA

Average pressure in May - Irvine, CA
  • Average pressure in May: 29.93"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in May
Irvine, CA

Average wind speed in May - Irvine, CA
  • Average wind speed in May: 6mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are September and October (4.8mph).

Average humidity in May
Irvine, CA

Average humidity in May - Irvine, CA
  • Average humidity in May: 69%

The month with the highest relative humidity is June (71%).
The month with the lowest relative humidity is November (56%).

Average rainfall in May
Irvine, CA

Average rainfall in May - Irvine, CA
  • Average rainfall in May: 0.31"

The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.08").

Average rainfall days in May
Irvine, CA

Average rainfall days in May - Irvine, CA
  • Average rainfall days in May: 5.4 days

The month with the highest number of rainy days is March (7.9 days).
The month with the least rainy days is June (2.2 days).

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

Average daylight in May / Average sunshine in May - Irvine, CA
  • Average daylight in May: 13h and 5min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in May: 11h and 1min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

Average sunshine days in May
Irvine, CA

Average sunshine days in May - Irvine, CA
  • Average sunshine days in May: 19.7 days

The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is May (19.7 days).

Average UV index in May
Irvine, CA

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

The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).

Average cloud cover in May
Irvine, CA

Average cloud cover in May - Irvine, CA
  • Average cloud cover in May: 19

The month with the most cloud cover is December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 7).

Average visibility in May
Irvine, CA

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

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

Irvine, California, USA

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