May weather forecast
Lake Forest, CA

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Weather in May

The last month of the spring, May, is also an agreeable month in Lake Forest, California, with temperature in the range of an average high of 70.9°F (21.6°C) and an average low of 55.2°F (12.9°C).

Temperature

The ushering in of May brings an average high-temperature of a still pleasant 70.9°F (21.6°C), closely mirroring the 69.3°F (20.7°C) of April. Nighttime temperature in Lake Forest experiences an average drop to a cool 55.2°F (12.9°C) in May.

Humidity

The months with the highest humidity in Lake Forest are May and June, with an average relative humidity of 69%.

Rainfall

In Lake Forest, California, during May, the rain falls for 6.2 days and regularly aggregates up to 0.39" (10mm) of precipitation. Throughout the year, in Lake Forest, there are 65.4 rainfall days, and 9.17" (233mm) of precipitation is accumulated.

Daylight

In Lake Forest, 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 7:55 pm PDT.

Sunshine

The average sunshine in May in Lake Forest is 11.1h.

UV index

In Lake Forest, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 5 during May translates into these guidelines:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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Frequently asked questions

What is the temperature in May in Lake Forest?

In Lake Forest, 70.9°F (21.6°C) is the average high-temperature and 55.2°F (12.9°C) is the average low-temperature during May.

What is the most humid month in Lake Forest?

The months with the highest humidity are May and June, with an average relative humidity of 69%.

What is the average humidity in May in Lake Forest?

The average relative humidity in May in Lake Forest is 69%.

How many days does it rain in May in Lake Forest?

In Lake Forest, in May, it is raining for 6.2 days, with typically 0.39" (10mm) of accumulated precipitation.

What is the average length of the day in May in Lake Forest?

In Lake Forest, California, the average day length in May is 13h and 55min.

What time are sunrise and sunset in May in Lake Forest?

In May, on the first day of the month, 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 7:55 pm PDT.

How long on average sun shines in May in Lake Forest?

In May, the average sunshine duration in Lake Forest, California, is 11.1h.

How high is the UV index in May in Lake Forest?

The average daily maximum UV index in May in Lake Forest is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability 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
Lake Forest, CA

Average temperature in May - Lake Forest, CA
  • Average high temperature in May: 70.9°F

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (63.1°F).

  • Average low temperature in May: 55.2°F

The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).

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Average pressure in May
Lake Forest, CA

Average pressure in May - Lake Forest, CA
  • Average pressure in May: 29.92"Hg

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

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Average wind speed in May
Lake Forest, CA

Average wind speed in May - Lake Forest, CA
  • Average wind speed in May: 5.7mph

The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest months (with the lowest average wind speed) are August and September (4.5mph).

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Average humidity in May
Lake Forest, CA

Average humidity in May - Lake Forest, CA
  • Average humidity in May: 69%

The months with the highest relative humidity are May and June (69%).
The month with the lowest relative humidity is November (55%).

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Average rainfall in May
Lake Forest, CA

Average rainfall in May - Lake Forest, CA
  • Average rainfall in May: 0.39"

The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in May
Lake Forest, CA

Average rainfall days in May - Lake Forest, CA
  • Average rainfall days in May: 6.2 days

The month with the highest number of rainy days is March (8.1 days).
The month with the least rainy days is June (2 days).

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Average daylight in May /
Average sunshine in May
Lake Forest, CA

Average daylight in May / Average sunshine in May - Lake Forest, 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).

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Average sunshine days in May
Lake Forest, CA

Average sunshine days in May - Lake Forest, CA
  • Average sunshine days in May: 19.3 days

The months with the most sunshine days are January and October (24.2 days).
The month with the least sunshine days is May (19.3 days).

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Average UV index in May
Lake Forest, CA

Average UV index in May - Lake Forest, 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).

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Average cloud cover in May
Lake Forest, CA

Average cloud cover in May - Lake Forest, CA
  • Average cloud cover in May: 20

The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in May
Lake Forest, CA

Average visibility in May - Lake Forest, 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).

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Lake Forest, California, USA

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