Morro Bay, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Morro Bay, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (25th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 23 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 25th Oct - 26th Oct 2025
Morro Bay, California, United States
7 AM25th Oct 2025
6 PM
6 AM26th Oct 2025
34AQI
18AQI
27AQI
16AQI
In the last 24 hours,
Morro Bay's AQI reached its highest point of 34 at 9 AM during the Day, while the lowest point, 16, was recorded at 12 AM during the Night between 25th Oct and 26th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Morro Bay, California, United States
17°C15/18°C
17°C15/19°C
19°C18/20°C
18°C15/19°C
17°C13/21°C
18°C14/21°C
17°C14/22°C
17°C13/22°C
17°C12/22°C
17°C13/23°C
16°C14/19°C
16°C13/18°C
17°C14/22°C
17°C12/22°C
17°C13/22°C
17°C13/24°C
17°C12/23°C
14°C9/20°C
13°C11/16°C
13°C9/18°C
15°C11/22°C
18°C12/27°C
15°C12/19°C
13°C10/16°C
14°C11/18°C
13°C12/14°C
15°C13/19°C
16°C12/23°C
15°C12/20°C
15°C13/20°C
--°C/°C
31AQI
19AQI
26AQI
19AQI
2025 Days Vs Air Quality
Morro Bay, California, United States
99%
212
0.9%
2
Total number of days with different AQI categories in last 299 days in 2025 (66 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2025, 99% of 299 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
Morro Bay, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
18AQI
18AQI
26AQI
20AQI
18AQI
17AQI
18AQI
20AQI
23AQI
25AQI
22AQI
23AQI
20AQI
16AQI
23AQI
26AQI
28AQI
37AQI
36AQI
29AQI
32AQI
33AQI
26AQI
24AQI
27AQI
27AQI
26AQI
28AQI
31AQI
35AQI
21AQI
13AQI
14AQI
26AQI
28AQI
26AQI
21AQI
27AQI
25AQI
39AQI
43AQI
46AQI
47AQI
39AQI
36AQI
45AQI
37AQI
20AQI
23AQI
29AQI
35AQI
35AQI
26AQI
27AQI
43AQI
34AQI
47AQI
45AQI
32AQI
30AQI
24AQI
22AQI
21AQI
28AQI
24AQI
25AQI
34AQI
33AQI
34AQI
31AQI
36AQI
29AQI
24AQI
29AQI
20AQI
19AQI
24AQI
37AQI
47AQI
43AQI
43AQI
39AQI
42AQI
39AQI
37AQI
43AQI
44AQI
36AQI
37AQI
32AQI
24AQI
25AQI
24AQI
26AQI
26AQI
25AQI
22AQI
26AQI
21AQI
32AQI
30AQI
47AQI
36AQI
29AQI
23AQI
22AQI
25AQI
33AQI
34AQI
29AQI
28AQI
28AQI
25AQI
26AQI
25AQI
29AQI
29AQI
22AQI
17AQI
17AQI
16AQI
17AQI
17AQI
17AQI
22AQI
30AQI
33AQI
29AQI
26AQI
27AQI
27AQI
44AQI
36AQI
37AQI
32AQI
30AQI
40AQI
37AQI
37AQI
40AQI
35AQI
25AQI
30AQI
23AQI
17AQI
28AQI
38AQI
39AQI
50AQI
59AQI
48AQI
46AQI
40AQI
44AQI
45AQI
46AQI
39AQI
43AQI
52AQI
50AQI
49AQI
48AQI
39AQI
36AQI
39AQI
32AQI
23AQI
21AQI
19AQI
28AQI
38AQI
41AQI
33AQI
28AQI
35AQI
39AQI
48AQI
40AQI
41AQI
37AQI
33AQI
39AQI
45AQI
30AQI
34AQI
40AQI
31AQI
37AQI
49AQI
14AQI
10AQI
24AQI
26AQI
22AQI
12AQI
18AQI
15AQI
15AQI
19AQI
25AQI
23AQI
19AQI
14AQI
12AQI
15AQI
17AQI
20AQI
22AQI
20AQI
37AQI
40AQI
28AQI
29AQI
23AQI
20AQI
25AQI
33AQI
32AQI
26AQI
37AQI
37AQI
21AQI
No. of days
202530AQI
Highest AQI recorded in
August37AQI
Lowest AQI recorded in
March20AQI
Most & Least Polluted Years Over the Last 1 Years
Morro Bay's annual 2025 AQI (30) shows an average percentage change of NaN% (improved AQI) compared to previous years: .