San Luis Obispo Weather in December
December in San Luis Obispo averages 17°C (63°F) during the day and 5°C (41°F) at night. It is the wettest month of the year, with 98 mm (3.9 in) of rainfall on average, so waterproof gear is a must.
Rainfall in San Luis Obispo in December
It's the month with the heaviest rainfall, so an umbrella is a must to navigate the wet weather. Typically around 10 days of rainfall are expected, averaging 98 mm (3.9 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in San Luis Obispo in December
In December, expect moderate temperatures in San Luis Obispo, with highs of 17°C (63°F) and lows of 5°C (41°F) at night. During December, you'll experience the winter season. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights drop to 5°C (41°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet. Experience mild yet warm temperatures during this month, offering a comfortable climate.
Sunshine in San Luis Obispo in December
Expect a lot of sunshine this month, with about 220 hours of sun. These sunny conditions add to the overall experience.December in San Luis Obispo can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our San Luis Obispo's climate page.
San Luis Obispo Temperature in December
Min Temperature
5°C (41°F)
Max Temperature
17°C (63°F)
Chance of Rain
33%
Precipitation
98 mm (3.9 in)
Rainy days
10 days
Sunshine
220 hours *
Percentage Sunshine
*
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
perfect weather
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tolerable
unpleasant
poor
What to Wear in San Luis Obispo in December
Comfortable temperatures call for an easy wardrobe in December. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in San Luis Obispo in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our San Luis Obispo's climate page.
See the full San Luis Obispo climate overview or explore weather in the United States of America.
