May weather forecast
Clearlake, CA

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A long footbridge over the marina in Clearlake, California
A long footbridge over the marina in Clearlake, California

Weather in May

The last month of the spring, May, is a warm month in Clearlake, California, with an average temperature ranging between max 73.9°F (23.3°C) and min 48.2°F (9°C).

Temperature

Clearlake in May observes a minor temperature shift, with average high-temperatures adjusting from a comfortable 66°F (18.9°C) in April to a warm 73.9°F (23.3°C). Contrary to the day's heat, an average low-temperature of 48.2°F (9°C) is recorded during the nights in May in Clearlake, California.

Humidity

The average relative humidity in May in Clearlake, California, is 59%.

Rainfall

In Clearlake, during May, the rain falls for 6.8 days and regularly aggregates up to 0.91" (23mm) of precipitation. In Clearlake, during the entire year, the rain falls for 79.8 days and collects up to 17.44" (443mm) of precipitation.

Snowfall

In Clearlake, snow does not fall in April through October.

Daylight

The average length of the day in May is 14h and 19min.
On the first day of the month, sunrise is at 6:11 am and sunset at 8:03 pm. On the last day of May, in Clearlake, sunrise is at 5:46 am and sunset at 8:29 pm PDT.

Sunshine

In May, the average sunshine in Clearlake is 10.6h.

UV index

In Clearlake, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum high UV index of 5 in May translates into the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
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Frequently asked questions

What are May temperatures in Clearlake?

The average high-temperature and low-temperature in Clearlake during May are 73.9°F (23.3°C) and 48.2°F (9°C) respectively.

What is the average humidity in May in Clearlake?

In Clearlake, the average relative humidity in May is 59%.

How much does it rain in Clearlake in May?

In Clearlake, during May, the rain falls for 6.8 days and regularly aggregates up to 0.91" (23mm) of precipitation.

When it does not snow in Clearlake?

In Clearlake, snow does not fall in April through October.

How many hours of daylight does Clearlake have in May?

The average day length in May in Clearlake is 14h and 19min.

When are sunrise and sunset in May in Clearlake?

In May, on the first day of the month, sunrise is at 6:11 am and sunset at 8:03 pm. On the last day of the month, in Clearlake, sunrise is at 5:46 am and sunset at 8:29 pm PDT.

How long on average sun shines in May in Clearlake?

In Clearlake, the average sunshine duration in May is 10.6h.

How high is the UV index in May in Clearlake?

The average daily maximum UV index in May in Clearlake, California, is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Clearlake, CA

Average temperature in May - Clearlake, CA
  • Average high temperature in May: 73.9°F

The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is December (52.7°F).

  • Average low temperature in May: 48.2°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is December (38.1°F).

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Average pressure in May
Clearlake, CA

Average pressure in May - Clearlake, CA
  • Average pressure in May: 29.96"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).

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Average wind speed in May
Clearlake, CA

Average wind speed in May - Clearlake, CA
  • Average wind speed in May: 5.6mph

The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).

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Average humidity in May
Clearlake, CA

Average humidity in May - Clearlake, CA
  • Average humidity in May: 59%

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (44%).

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Average rainfall in May
Clearlake, CA

Average rainfall in May - Clearlake, CA
  • Average rainfall in May: 0.91"

The wettest month (with the highest rainfall) is February (3.7").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in May
Clearlake, CA

Average rainfall days in May - Clearlake, CA
  • Average rainfall days in May: 6.8 days

The month with the highest number of rainy days is March (13.9 days).
The months with the least rainy days are July and August (1.1 days).

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Average snowfall in May
Clearlake, CA

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

The month with the highest snowfall is February (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in May
Clearlake, CA

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

The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in May / Average sunshine in May - Clearlake, CA
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in May: 10h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

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Average sunshine days in May
Clearlake, CA

Average sunshine days in May - Clearlake, CA
  • Average sunshine days in May: 23.1 days

The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is March (15.8 days).

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Average UV index in May
Clearlake, CA

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

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 2).

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Average cloud cover in May
Clearlake, CA

Average cloud cover in May - Clearlake, CA
  • Average cloud cover in May: 24

The month with the most cloud cover is March (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in May
Clearlake, CA

Average visibility in May - Clearlake, 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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Clearlake, California, USA

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