Fullerton, 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
Fullerton, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (14th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 37 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.
Day & Night AQI Trend: 14th Aug - 15th Aug 2026
Fullerton, California, United States
6 AM14th Aug 2026
7 PM
5 AM15th Aug 2026
50AQI
24AQI
48AQI
20AQI
In the last 24 hours,
Fullerton's AQI reached its highest point of 50 at 2 PM during the Day, while the lowest point, 20, was recorded at 8 PM during the Night between 14th Aug and 15th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Fullerton, California, United States
25°C20/35°C
25°C21/32°C
26°C21/34°C
26°C20/36°C
26°C20/33°C
26°C22/33°C
27°C20/37°C
26°C21/36°C
26°C20/35°C
27°C20/38°C
25°C20/36°C
25°C20/34°C
25°C20/34°C
25°C20/35°C
26°C20/36°C
26°C20/37°C
26°C20/36°C
25°C20/35°C
24°C20/33°C
24°C19/33°C
25°C19/35°C
27°C20/36°C
28°C20/40°C
27°C21/39°C
26°C21/34°C
26°C20/35°C
25°C20/33°C
24°C21/32°C
24°C21/32°C
23°C18/28°C
65AQI
46AQI
51AQI
45AQI
2026 Days Vs Air Quality
Fullerton, California, United States
85%
190
15%
33
Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2026, 85% of 227 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Fullerton, California, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI (US)
22AQI (US)
14AQI (US)
16AQI (US)
23AQI (US)
18AQI (US)
23AQI (US)
23AQI (US)
26AQI (US)
23AQI (US)
16AQI (US)
22AQI (US)
29AQI (US)
36AQI (US)
31AQI (US)
32AQI (US)
31AQI (US)
23AQI (US)
32AQI (US)
36AQI (US)
53AQI (US)
51AQI (US)
38AQI (US)
28AQI (US)
31AQI (US)
32AQI (US)
27AQI (US)
40AQI (US)
49AQI (US)
47AQI (US)
33AQI (US)
48AQI (US)
40AQI (US)
41AQI (US)
36AQI (US)
34AQI (US)
36AQI (US)
36AQI (US)
35AQI (US)
37AQI (US)
30AQI (US)
24AQI (US)
27AQI (US)
30AQI (US)
37AQI (US)
35AQI (US)
31AQI (US)
31AQI (US)
26AQI (US)
28AQI (US)
26AQI (US)
27AQI (US)
32AQI (US)
31AQI (US)
33AQI (US)
32AQI (US)
33AQI (US)
33AQI (US)
39AQI (US)
30AQI (US)
42AQI (US)
31AQI (US)
33AQI (US)
35AQI (US)
33AQI (US)
29AQI (US)
19AQI (US)
31AQI (US)
36AQI (US)
35AQI (US)
31AQI (US)
31AQI (US)
30AQI (US)
27AQI (US)
41AQI (US)
39AQI (US)
47AQI (US)
42AQI (US)
45AQI (US)
27AQI (US)
21AQI (US)
35AQI (US)
39AQI (US)
40AQI (US)
37AQI (US)
41AQI (US)
30AQI (US)
23AQI (US)
34AQI (US)
32AQI (US)
31AQI (US)
20AQI (US)
25AQI (US)
28AQI (US)
27AQI (US)
34AQI (US)
36AQI (US)
43AQI (US)
44AQI (US)
31AQI (US)
45AQI (US)
21AQI (US)
21AQI (US)
23AQI (US)
37AQI (US)
39AQI (US)
32AQI (US)
30AQI (US)
41AQI (US)
38AQI (US)
36AQI (US)
40AQI (US)
39AQI (US)
19AQI (US)
32AQI (US)
32AQI (US)
34AQI (US)
38AQI (US)
45AQI (US)
33AQI (US)
25AQI (US)
47AQI (US)
30AQI (US)
34AQI (US)
44AQI (US)
45AQI (US)
34AQI (US)
45AQI (US)
38AQI (US)
43AQI (US)
34AQI (US)
49AQI (US)
59AQI (US)
60AQI (US)
68AQI (US)
62AQI (US)
58AQI (US)
46AQI (US)
54AQI (US)
49AQI (US)
46AQI (US)
42AQI (US)
24AQI (US)
36AQI (US)
21AQI (US)
16AQI (US)
18AQI (US)
24AQI (US)
33AQI (US)
42AQI (US)
47AQI (US)
43AQI (US)
41AQI (US)
28AQI (US)
30AQI (US)
40AQI (US)
41AQI (US)
40AQI (US)
40AQI (US)
36AQI (US)
23AQI (US)
24AQI (US)
52AQI (US)
42AQI (US)
45AQI (US)
40AQI (US)
31AQI (US)
23AQI (US)
30AQI (US)
42AQI (US)
47AQI (US)
42AQI (US)
33AQI (US)
36AQI (US)
27AQI (US)
22AQI (US)
39AQI (US)
42AQI (US)
42AQI (US)
47AQI (US)
36AQI (US)
28AQI (US)
48AQI (US)
50AQI (US)
70AQI (US)
52AQI (US)
61AQI (US)
39AQI (US)
31AQI (US)
28AQI (US)
50AQI (US)
72AQI (US)
57AQI (US)
51AQI (US)
80AQI (US)
66AQI (US)
55AQI (US)
76AQI (US)
49AQI (US)
46AQI (US)
48AQI (US)
50AQI (US)
52AQI (US)
52AQI (US)
54AQI (US)
51AQI (US)
52AQI (US)
55AQI (US)
54AQI (US)
52AQI (US)
51AQI (US)
56AQI (US)
52AQI (US)
53AQI (US)
52AQI (US)
48AQI (US)
48AQI (US)
49AQI (US)
51AQI (US)
48AQI (US)
45AQI (US)
43AQI (US)
37AQI (US)
30AQI (US)
33AQI (US)
34AQI (US)
33AQI (US)
41AQI (US)
37AQI (US)
52AQI (US)
49AQI (US)
No. of days
202638AQI (US)
Highest AQI (US) recorded in
July52AQI (US)
Lowest AQI (US) recorded in
January30AQI (US)
202543AQI (US)
Highest AQI (US) recorded in
January58AQI (US)
Lowest AQI (US) recorded in
March35AQI (US)
202444AQI (US)
Highest AQI (US) recorded in
December75AQI (US)
Lowest AQI (US) recorded in
March32AQI (US)
202341AQI (US)
Highest AQI (US) recorded in
October54AQI (US)
Lowest AQI (US) recorded in
March25AQI (US)
202238AQI (US)
Highest AQI (US) recorded in
August50AQI (US)
Lowest AQI (US) recorded in
July29AQI (US)
202142AQI (US)
Highest AQI (US) recorded in
November63AQI (US)
Lowest AQI (US) recorded in
March27AQI (US)
202057AQI (US)
Highest AQI (US) recorded in
September66AQI (US)
Lowest AQI (US) recorded in
December49AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Fullerton's annual 2026 AQI (US) (38) shows an average percentage change of -12.5% (improved AQI (US)) compared to previous years: 2020 (57), 2021 (42), 2022 (38), 2023 (41), 2024 (44), 2025 (43).