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

Weather in San Luis Obispo, California for September 2027

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

    Temperatures

  • In general, the average temperature in San Luis Obispo at the beginning of September is 27 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23.4 °C by the end of September.

    • Rain 🌧️

  • Precipitation in San Luis Obispo during September is a rare event, with an average of fewer than 2 rainy days.

    • More

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

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

Average dry days
29
Dry days
Average rainy days
1
Rainy days
Average snowy days
0
Snow days
Average temperatures
25°/14°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
69 %
Avg humidity

San Luis Obispo Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
25°
2
Sunny
26°
3
Sunny
27°
4
Sunny
25°
5
Sunny
29°
6
Sunny
28°
7
Sunny
29°
8
Sunny
29°
9
Sunny
30°
10
Sunny
27°
11
Sunny
25°
12
Sunny
24°
13
Sunny
23°
14
Sunny
27°
15
Partly cloudy
23°
16
Partly cloudy
22°
17
Mist
25°
18
Patchy rain possible
21°
19
Mist
21°
20
Thundery outbreaks possible
21°
21
Mist
23°
22
Partly cloudy
24°
23
Light rain
28°
24
Light rain
24°
25
Partly cloudy
24°
26
Partly cloudy
23°
27
Partly cloudy
22°
28
Partly cloudy
21°
29
Partly cloudy
25°
30
Partly cloudy
25°

Temperatures trend during September in San Luis Obispo

See the weather trend as well as the moving average line

September weather in San Luis Obispo day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Sunny
Sunny
 25° /13° 0 mm 8
Sept. 2 Sunny
Sunny
 26° /13° 0 mm 8
Sept. 3 Sunny
Sunny
 27° /14° 0 mm 8
Sept. 4 Sunny
Sunny
 25° /15° 0.4 mm 6
Sept. 5 Sunny
Sunny
 29° /15° 0 mm 8
Sept. 6 Sunny
Sunny
 28° /15° 0 mm 8
Sept. 7 Sunny
Sunny
 29° /14° 0 mm 8
Sept. 8 Sunny
Sunny
 29° /15° 0 mm 5
Sept. 9 Sunny
Sunny
 30° /15° 0 mm 7
Sept. 10 Sunny
Sunny
 27° /14° 0 mm 7
Sept. 11 Sunny
Sunny
 25° /12° 0 mm 7
Sept. 12 Sunny
Sunny
 24° /12° 0 mm 6
Sept. 13 Sunny
Sunny
 23° /12° 0 mm 6
Sept. 14 Sunny
Sunny
 27° /13° 0 mm 7
Sept. 15 Partly cloudy
Partly cloudy
 23° /13° 0 mm 6
Sept. 16 Partly cloudy
Partly cloudy
 22° /13° 0 mm 6
Sept. 17 Mist
Mist
 25° /14° 0 mm 7
Sept. 18 Patchy rain possible
Patchy rain possible
 21° /13° 2.4 mm 6
Sept. 19 Mist
Mist
 21° /13° 0 mm 6
Sept. 20 Thundery outbreaks possible
Thundery outbreaks possible
 21° /12° 0 mm 4
Sept. 21 Mist
Mist
 23° /12° 0 mm 6
Sept. 22 Partly cloudy
Partly cloudy
 24° /12° 0 mm 7
Sept. 23 Light rain
Light rain
 28° /16° 3.2 mm 7
Sept. 24 Light rain
Light rain
 24° /16° 8 mm 6
Sept. 25 Partly cloudy
Partly cloudy
 24° /13° 0 mm 6
Sept. 26 Partly cloudy
Partly cloudy
 23° /13° 0 mm 5
Sept. 27 Partly cloudy
Partly cloudy
 22° /13° 0 mm 6
Sept. 28 Partly cloudy
Partly cloudy
 21° /12° 0 mm 5
Sept. 29 Partly cloudy
Partly cloudy
 25° /13° 0 mm 6
Sept. 30 Partly cloudy
Partly cloudy
 25° /14° 0 mm 6
Next
Important Notice
Our weather forecast for San Luis Obispo in September 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 forecast closer to your planned date for the most up-to-date weather information.
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San Luis Obispo in September - FAQ

What are the expected maximum and minimum temperatures in San Luis Obispo during September?
Enjoy moderate daytime temperatures of up to 25° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in San Luis Obispo during September?
Expect minimal rainfall in San Luis Obispo during September, with a total of 14 mm over approximately 1 days. This minimal precipitation is unlikely to significantly impact plans.

What are the typical wind conditions in San Luis Obispo during September?
The average wind speed in San Luis Obispo during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in San Luis Obispo

Explore the daily rainfall trends and prepare for San Luis Obispos September weather 💧
Typically, San Luis Obispo has 1 rainy days in September with a total of 14 mm of rainfall.

UV exposure in San Luis Obispo during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is San Luis Obispo?

Get accurate weather forecasts for San Luis Obispo, located at latitude 35.283 and longitude -120.66. Stay updated with localized weather information tailored for San Luis Obispo.

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