San Luis Obispo Weather in May

What's the weather like in San Luis Obispo (California) in May 2025?

The climate in San Luis Obispo during May can be summarized as mild and very dry.

May is in the spring in San Luis Obispo and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 21°C (69°F), whilst at night 8°C (46°F) is normal.

San Luis Obispo weather averages (imperial / metric)
Daytime temperature	20.8°C 69.4°F
Nightly temperature	7.8°C 46°F
Average temperature	14.3°C 57.7°F
Daily sunshine	11.3 hrs
Avg rainfall	9 mm 0.4 ins
Rainy days	2 days
Sea temperature	13.6°C 56.5°F
Humidity	72%
Windspeed	15.5kph 10 mph

On average May is the 4th driest month of the year in San Luis Obispo with around 9mm 0.4 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 11.3 hours of sunshine per day.

May temperatures in San Luis Obispo

San Luis Obispo average temperature in May

May rainfall

May hourly sunshine

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in San Luis Obispo in May 2025.

Other monthly averages

Best places to visit in May

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

San Luis Obispo weather stats

San Luis Obispo weather statistics
Hottest month:	August	25.8°C 78.4°F
Driest month:	June	2mm 0.1ins
Sunniest month:	April	11hrs
Coldest month:	January	15.7°C 60.3°F
Wettest month:	January	100mm 3.9ins

Map showing location of San Luis Obispo (35.28275, -120.65962)