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San Luis Obispo County (San Luis Obispo)
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United States weather

Weather in San Luis Obispo County, California for December 2026

Your guide to San Luis Obispo County weather in December - trends and predictions

    Rain 🌧️

  • With an average of 4 rainy days, San Luis Obispo County experiences minimal rainfall in December.

    • More

  • Is December a good time to visit San Luis Obispo County? check out the best time to travel to San Luis Obispo County page.

  • ✨ Is December a good time to visit San Luis Obispo County? – Ask the AI Weatherman

Average dry days
27
Dry days
Average rainy days
4
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/7°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
69 %
Avg humidity

San Luis Obispo County Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Cloudy
17°
2
Overcast
17°
3
Cloudy
16°
4
Sunny
17°
5
Partly cloudy
22°
6
Sunny
23°
7
Partly cloudy
21°
8
Cloudy
21°
9
Partly cloudy
21°
10
Sunny
23°
11
Overcast
21°
12
Overcast
17°
13
Overcast
16°
14
Moderate or heavy rain shower
16°
15
Mist
17°
16
Overcast
20°
17
Partly cloudy
20°
18
Partly cloudy
22°
19
Overcast
21°
20
Overcast
17°
21
Overcast
14°
22
Overcast
17°
23
Mist
16°
24
Heavy rain
14°
25
Heavy rain
12°
26
Moderate rain
15°
27
Light rain
13°
28
Overcast
17°
29
Mist
16°
30
Sunny
19°
31
Moderate rain
17°

Temperatures trend during December in San Luis Obispo County

See the weather trend as well as the moving average line

December weather in San Luis Obispo County day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
Dec. 1 Cloudy
Cloudy
 17° /8° 0 mm 2.8
Dec. 2 Overcast
Overcast
 17° /6° 0 mm 2.8
Dec. 3 Cloudy
Cloudy
 16° /7° 0 mm 2.8
Dec. 4 Sunny
Sunny
 17° /5° 0 mm 2.7
Dec. 5 Partly cloudy
Partly cloudy
 22° /5° 0 mm 2.7
Dec. 6 Sunny
Sunny
 23° /7° 0 mm 2.7
Dec. 7 Partly cloudy
Partly cloudy
 21° /7° 0 mm 2.7
Dec. 8 Cloudy
Cloudy
 21° /8° 0 mm 2.7
Dec. 9 Partly cloudy
Partly cloudy
 21° /7° 0 mm 2.6
Dec. 10 Sunny
Sunny
 23° /8° 0 mm 2.6
Dec. 11 Overcast
Overcast
 21° /6° 0 mm 2.6
Dec. 12 Overcast
Overcast
 17° /7° 0 mm 2.6
Dec. 13 Overcast
Overcast
 16° /8° 0 mm 2.6
Dec. 14 Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /7° 7 mm 2.6
Dec. 15 Mist
Mist
 17° /5° 0 mm 2.6
Dec. 16 Overcast
Overcast
 20° /8° 0 mm 2.6
Dec. 17 Partly cloudy
Partly cloudy
 20° /10° 0 mm 2.6
Dec. 18 Partly cloudy
Partly cloudy
 22° /8° 0 mm 2.6
Dec. 19 Overcast
Overcast
 21° /8° 0 mm 2.6
Dec. 20 Overcast
Overcast
 17° /7° 0 mm 2
Dec. 21 Overcast
Overcast
 14° /9° 0 mm 2
Dec. 22 Overcast
Overcast
 17° /10° 0 mm 2
Dec. 23 Mist
Mist
 16° /10° 0 mm 2
Dec. 24 Heavy rain
Heavy rain
 14° /8° 74.7 mm 2
Dec. 25 Heavy rain
Heavy rain
 12° /8° 81.1 mm 2
Dec. 26 Moderate rain
Moderate rain
 15° /7° 21 mm 2
Dec. 27 Light rain
Light rain
 13° /8° 1.8 mm 2
Dec. 28 Overcast
Overcast
 17° /5° 0 mm 2.6
Dec. 29 Mist
Mist
 16° /5° 0 mm 2
Dec. 30 Sunny
Sunny
 19° /7° 0 mm 2.6
Dec. 31 Moderate rain
Moderate rain
 17° /6° 15.9 mm 2.6
Next
Important Notice
Our weather forecast for San Luis Obispo County in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Luis Obispo County forecast closer to your planned date for the most up-to-date weather information.
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San Luis Obispo County in December - FAQ

What are the expected maximum and minimum temperatures in San Luis Obispo County during December?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in San Luis Obispo County during December?
Significant rainfall exceeding 201.7 mm is expected in San Luis Obispo County during December, occurring over more than 4 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in San Luis Obispo County during December?
The average wind speed in San Luis Obispo County during December is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in San Luis Obispo County

Explore the daily rainfall trends and prepare for San Luis Obispo Countys December weather 💧
Typically, San Luis Obispo County has 4 rainy days in December with a total of 201.7 mm of rainfall.

UV exposure in San Luis Obispo County during December

Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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