May weather forecast
San Luis Obispo, CA

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Beautiful blue water surrounded by scenic mountain ranges at the San Luis Obispo, California
Beautiful blue water surrounded by scenic mountain ranges at the San Luis Obispo, California

Weather in May

May, the last month of the spring in San Luis Obispo, is an agreeable month, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 51.4°F (10.8°C).

Temperature

As May takes its course, San Luis Obispo's average high-temperature registers at an agreeable 71.2°F (21.8°C), closely aligning with the preceding month. An average low-temperature of 51.4°F (10.8°C) is recorded during the nights in May.

Humidity

The average relative humidity in May in San Luis Obispo is 64%.

Rainfall

In San Luis Obispo, California, in May, it is raining for 3.6 days, with typically 0.28" (7mm) of accumulated precipitation. In San Luis Obispo, California, during the entire year, the rain falls for 57 days and collects up to 9.57" (243mm) of precipitation.

Daylight

In San Luis Obispo, California, the average length of the day in May is 14h and 2min.
On the first day of May, sunrise is at 6:10 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:11 pm PDT.

Sunshine

The average sunshine in May in San Luis Obispo is 11.4h.

UV index

In San Luis Obispo, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 5 during May translates into the following directions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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Frequently asked questions

What is the average May temperature in San Luis Obispo?

An average high-temperature, in May, in San Luis Obispo, is 71.2°F (21.8°C) and the average low-temperature is 51.4°F (10.8°C).

What is the average humidity in May in San Luis Obispo?

The average relative humidity in May in San Luis Obispo, California, is 64%.

How much does it rain in San Luis Obispo in May?

In San Luis Obispo, California, during May, the rain falls for 3.6 days and regularly aggregates up to 0.28" (7mm) of precipitation.

What is the average length of the day in May in San Luis Obispo?

In May, the average day length is 14h and 2min.

What time are sunrise and sunset in May in San Luis Obispo?

In May, on the first day of the month, sunrise is at 6:10 am and sunset at 7:49 pm. On the last day of the month, in San Luis Obispo, sunrise is at 5:49 am and sunset at 8:11 pm PDT.

How long on average sun shines in May in San Luis Obispo?

In May, the average sunshine duration is 11.4h.

How high is the UV index in May in San Luis Obispo?

In May, the average daily maximum UV index in San Luis Obispo, California, is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to the Sun's 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
San Luis Obispo, CA

Average temperature in May - San Luis Obispo, CA
  • Average high temperature in May: 71.2°F

The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (60.3°F).

  • Average low temperature in May: 51.4°F

The month with the highest average low temperature is September (60.3°F).
The coldest month (with the lowest average low temperature) is February (45.7°F).

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Average pressure in May
San Luis Obispo, CA

Average pressure in May - San Luis Obispo, CA
  • Average pressure in May: 29.97"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).

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Average wind speed in May
San Luis Obispo, CA

Average wind speed in May - San Luis Obispo, CA
  • Average wind speed in May: 6.8mph

The windiest months (with the highest average wind speed) are April and May (6.8mph).
The calmest months (with the lowest average wind speed) are August and September (5.3mph).

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Average humidity in May
San Luis Obispo, CA

Average humidity in May - San Luis Obispo, CA
  • Average humidity in May: 64%

The month with the highest relative humidity is March (69%).
The months with the lowest relative humidity are September and October (57%).

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Average rainfall in May
San Luis Obispo, CA

Average rainfall in May - San Luis Obispo, CA
  • Average rainfall in May: 0.28"

The wettest month (with the highest rainfall) is March (2.01").
The driest months (with the least rainfall) are June and August (0.04").

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Average rainfall days in May
San Luis Obispo, CA

Average rainfall days in May - San Luis Obispo, CA
  • Average rainfall days in May: 3.6 days

The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is August (0.6 days).

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Average daylight in May /
Average sunshine in May
San Luis Obispo, CA

Average daylight in May / Average sunshine in May - San Luis Obispo, CA
  • Average daylight in May: 14h and 0min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in May: 11h and 2min

The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 6h and 30min).

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Average sunshine days in May
San Luis Obispo, CA

Average sunshine days in May - San Luis Obispo, CA
  • Average sunshine days in May: 26.1 days

The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is February (19.1 days).

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Average UV index in May
San Luis Obispo, CA

Average UV index in May - San Luis Obispo, CA
  • Average UV index in May: 5

The months with the highest UV index are June and August (UV index 6).
The month with the lowest UV index is February (UV index 3).

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Average cloud cover in May
San Luis Obispo, CA

Average cloud cover in May - San Luis Obispo, CA
  • Average cloud cover in May: 16

The month with the most cloud cover is March (Cloud cover 28).
The months with the least cloud cover are August and September (Cloud cover 6).

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Average visibility in May
San Luis Obispo, CA

Average visibility in May - San Luis Obispo, 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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San Luis Obispo, California, USA

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