San Luis Obispo Weather in March

The climate in San Luis Obispo during March can be summarized as mild and a little damp.

March is in the spring in San Luis Obispo and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 17°C (63°F), whilst at night 5°C (41°F) is normal.

On average March is the 3rd wettest month of the year in San Luis Obispo with around 81mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.3 hours of sunshine per day.

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 March 2025.