San Luis Obispo, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
San Luis Obispo, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (18th August):
On this day, AQI across the 3 years varied significantly: 2026 ranks 1st highest AQI at 48 of Good air quality on the same day.
Day & Night AQI Trend: 17th Aug - 18th Aug 2026
San Luis Obispo, California, United States
6 AM17th Aug 2026
8 PM
5 AM18th Aug 2026
68AQI
42AQI
70AQI
44AQI
In the last 24 hours,
San Luis Obispo's AQI reached its highest point of 70 at 8 PM during the Night, while the lowest point, 42, was recorded at 7 AM during the Day between 17th Aug and 18th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
San Luis Obispo, California, United States
20°C12/32°C
23°C15/34°C
19°C15/24°C
20°C14/28°C
20°C13/30°C
21°C13/32°C
19°C13/30°C
19°C11/29°C
19°C12/30°C
18°C11/29°C
19°C12/31°C
20°C11/33°C
20°C11/32°C
19°C11/30°C
18°C12/28°C
18°C12/24°C
18°C14/25°C
19°C15/29°C
19°C13/29°C
20°C14/29°C
20°C14/30°C
21°C15/29°C
20°C15/27°C
19°C15/24°C
18°C16/21°C
19°C15/25°C
18°C13/24°C
18°C13/24°C
18°C14/25°C
18°C14/29°C
55AQI
39AQI
56AQI
44AQI
2026 Days Vs Air Quality
San Luis Obispo, California, United States
96%
217
4%
10
Total number of days with different AQI categories in last 230 days in 2026 (135 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2026, 96% of 230 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
San Luis Obispo, California, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
23AQI (US)
18AQI (US)
18AQI (US)
15AQI (US)
22AQI (US)
20AQI (US)
22AQI (US)
20AQI (US)
21AQI (US)
23AQI (US)
24AQI (US)
24AQI (US)
26AQI (US)
30AQI (US)
30AQI (US)
30AQI (US)
26AQI (US)
23AQI (US)
22AQI (US)
28AQI (US)
22AQI (US)
30AQI (US)
27AQI (US)
26AQI (US)
26AQI (US)
29AQI (US)
24AQI (US)
25AQI (US)
36AQI (US)
44AQI (US)
28AQI (US)
38AQI (US)
34AQI (US)
30AQI (US)
27AQI (US)
31AQI (US)
34AQI (US)
30AQI (US)
27AQI (US)
28AQI (US)
26AQI (US)
23AQI (US)
24AQI (US)
28AQI (US)
27AQI (US)
27AQI (US)
28AQI (US)
28AQI (US)
32AQI (US)
28AQI (US)
24AQI (US)
23AQI (US)
26AQI (US)
25AQI (US)
24AQI (US)
30AQI (US)
16AQI (US)
18AQI (US)
19AQI (US)
26AQI (US)
44AQI (US)
23AQI (US)
31AQI (US)
27AQI (US)
18AQI (US)
21AQI (US)
20AQI (US)
16AQI (US)
23AQI (US)
24AQI (US)
20AQI (US)
23AQI (US)
26AQI (US)
22AQI (US)
20AQI (US)
22AQI (US)
19AQI (US)
24AQI (US)
28AQI (US)
20AQI (US)
26AQI (US)
26AQI (US)
26AQI (US)
21AQI (US)
26AQI (US)
25AQI (US)
15AQI (US)
14AQI (US)
18AQI (US)
18AQI (US)
20AQI (US)
27AQI (US)
18AQI (US)
26AQI (US)
25AQI (US)
30AQI (US)
26AQI (US)
28AQI (US)
22AQI (US)
29AQI (US)
30AQI (US)
20AQI (US)
23AQI (US)
23AQI (US)
22AQI (US)
22AQI (US)
20AQI (US)
22AQI (US)
16AQI (US)
18AQI (US)
24AQI (US)
19AQI (US)
17AQI (US)
16AQI (US)
16AQI (US)
22AQI (US)
21AQI (US)
25AQI (US)
20AQI (US)
16AQI (US)
21AQI (US)
22AQI (US)
26AQI (US)
29AQI (US)
19AQI (US)
23AQI (US)
20AQI (US)
21AQI (US)
24AQI (US)
24AQI (US)
22AQI (US)
40AQI (US)
52AQI (US)
58AQI (US)
56AQI (US)
52AQI (US)
49AQI (US)
37AQI (US)
44AQI (US)
45AQI (US)
43AQI (US)
42AQI (US)
22AQI (US)
14AQI (US)
17AQI (US)
22AQI (US)
22AQI (US)
28AQI (US)
27AQI (US)
17AQI (US)
20AQI (US)
22AQI (US)
24AQI (US)
29AQI (US)
25AQI (US)
21AQI (US)
28AQI (US)
24AQI (US)
24AQI (US)
14AQI (US)
12AQI (US)
14AQI (US)
16AQI (US)
15AQI (US)
13AQI (US)
16AQI (US)
19AQI (US)
13AQI (US)
14AQI (US)
14AQI (US)
15AQI (US)
12AQI (US)
15AQI (US)
14AQI (US)
29AQI (US)
19AQI (US)
20AQI (US)
13AQI (US)
14AQI (US)
16AQI (US)
16AQI (US)
12AQI (US)
14AQI (US)
13AQI (US)
16AQI (US)
24AQI (US)
20AQI (US)
20AQI (US)
18AQI (US)
16AQI (US)
18AQI (US)
18AQI (US)
28AQI (US)
38AQI (US)
48AQI (US)
50AQI (US)
44AQI (US)
43AQI (US)
41AQI (US)
42AQI (US)
50AQI (US)
50AQI (US)
48AQI (US)
52AQI (US)
52AQI (US)
44AQI (US)
42AQI (US)
50AQI (US)
48AQI (US)
48AQI (US)
55AQI (US)
46AQI (US)
38AQI (US)
40AQI (US)
42AQI (US)
48AQI (US)
50AQI (US)
52AQI (US)
44AQI (US)
42AQI (US)
42AQI (US)
45AQI (US)
40AQI (US)
43AQI (US)
51AQI (US)
53AQI (US)
48AQI (US)
25AQI (US)
27AQI (US)
23AQI (US)
22AQI (US)
31AQI (US)
19AQI (US)
32AQI (US)
46AQI (US)
No. of days
202627AQI (US)
Highest AQI (US) recorded in
August46AQI (US)
Lowest AQI (US) recorded in
June19AQI (US)
202531AQI (US)
Highest AQI (US) recorded in
January36AQI (US)
Lowest AQI (US) recorded in
October21AQI (US)
202430AQI (US)
Highest AQI (US) recorded in
December35AQI (US)
Lowest AQI (US) recorded in
February9AQI (US)
202326AQI (US)
Highest AQI (US) recorded in
November29AQI (US)
Lowest AQI (US) recorded in
December26AQI (US)
202124AQI (US)
Highest AQI (US) recorded in
January24AQI (US)
Lowest AQI (US) recorded in
January24AQI (US)
202035AQI (US)
Highest AQI (US) recorded in
September58AQI (US)
Lowest AQI (US) recorded in
May27AQI (US)
Most & Least Polluted Years Over the Last 6 Years
San Luis Obispo's annual 2026 AQI (US) (27) shows an average percentage change of -5.8% (improved AQI (US)) compared to previous years: 2020 (35), 2021 (24), 2023 (26), 2024 (30), 2025 (31).