East 20th Street, Signal Hill, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
July Air Quality Analysis
East 20th Street, Signal Hill, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (16th July):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 38 of Good air quality on the same day.
Day & Night AQI Trend: 15th Jul - 16th Jul 2026
East 20th Street, Signal Hill, California, United States
5 AM15th Jul 2026
8 PM
4 AM16th Jul 2026
53AQI
26AQI
32AQI
20AQI
In the last 24 hours,
East 20th Street's AQI reached its highest point of 53 at 5 PM during the Day, while the lowest point, 20, was recorded at 1 AM during the Night between 15th Jul and 16th Jul 2026.
Day & Night AQI Trend : Jun - Jul 2026
East 20th Street, Signal Hill, California, United States
19°C17/24°C
19°C17/24°C
19°C16/23°C
18°C14/24°C
19°C14/25°C
20°C15/29°C
20°C16/29°C
21°C17/29°C
20°C16/29°C
20°C17/28°C
20°C18/24°C
19°C17/21°C
20°C17/24°C
20°C17/24°C
19°C16/24°C
21°C16/29°C
21°C15/31°C
21°C15/33°C
22°C16/31°C
23°C17/32°C
23°C17/33°C
23°C17/33°C
21°C18/27°C
20°C17/24°C
20°C18/24°C
22°C17/29°C
24°C18/32°C
24°C18/34°C
26°C19/37°C
23°C20/31°C
41AQI
28AQI
43AQI
29AQI
2026 Days Vs Air Quality
East 20th Street, Signal Hill, California, United States
97%
188
3%
6
Total number of days with different AQI categories in last 197 days in 2026 (168 days remaining)
Under WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2026, 97% of 197 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
East 20th Street, Signal Hill, California, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI (US)
31AQI (US)
16AQI (US)
15AQI (US)
26AQI (US)
25AQI (US)
25AQI (US)
19AQI (US)
24AQI (US)
44AQI (US)
38AQI (US)
34AQI (US)
39AQI (US)
46AQI (US)
34AQI (US)
39AQI (US)
36AQI (US)
28AQI (US)
46AQI (US)
48AQI (US)
69AQI (US)
38AQI (US)
31AQI (US)
27AQI (US)
29AQI (US)
32AQI (US)
32AQI (US)
39AQI (US)
46AQI (US)
48AQI (US)
30AQI (US)
43AQI (US)
43AQI (US)
41AQI (US)
35AQI (US)
40AQI (US)
31AQI (US)
32AQI (US)
34AQI (US)
31AQI (US)
28AQI (US)
26AQI (US)
25AQI (US)
29AQI (US)
31AQI (US)
32AQI (US)
30AQI (US)
30AQI (US)
23AQI (US)
24AQI (US)
22AQI (US)
24AQI (US)
29AQI (US)
28AQI (US)
30AQI (US)
28AQI (US)
24AQI (US)
26AQI (US)
25AQI (US)
29AQI (US)
35AQI (US)
17AQI (US)
22AQI (US)
27AQI (US)
21AQI (US)
27AQI (US)
20AQI (US)
20AQI (US)
21AQI (US)
26AQI (US)
29AQI (US)
29AQI (US)
22AQI (US)
21AQI (US)
28AQI (US)
35AQI (US)
31AQI (US)
34AQI (US)
31AQI (US)
23AQI (US)
19AQI (US)
33AQI (US)
29AQI (US)
31AQI (US)
29AQI (US)
26AQI (US)
28AQI (US)
22AQI (US)
22AQI (US)
24AQI (US)
27AQI (US)
17AQI (US)
23AQI (US)
24AQI (US)
24AQI (US)
31AQI (US)
31AQI (US)
36AQI (US)
26AQI (US)
23AQI (US)
46AQI (US)
21AQI (US)
18AQI (US)
18AQI (US)
29AQI (US)
21AQI (US)
28AQI (US)
26AQI (US)
19AQI (US)
24AQI (US)
19AQI (US)
16AQI (US)
24AQI (US)
21AQI (US)
18AQI (US)
23AQI (US)
26AQI (US)
24AQI (US)
39AQI (US)
32AQI (US)
25AQI (US)
26AQI (US)
30AQI (US)
28AQI (US)
34AQI (US)
38AQI (US)
32AQI (US)
37AQI (US)
32AQI (US)
35AQI (US)
29AQI (US)
38AQI (US)
44AQI (US)
59AQI (US)
54AQI (US)
54AQI (US)
54AQI (US)
41AQI (US)
50AQI (US)
49AQI (US)
45AQI (US)
44AQI (US)
24AQI (US)
20AQI (US)
21AQI (US)
17AQI (US)
13AQI (US)
22AQI (US)
29AQI (US)
39AQI (US)
44AQI (US)
36AQI (US)
35AQI (US)
25AQI (US)
34AQI (US)
32AQI (US)
27AQI (US)
31AQI (US)
26AQI (US)
26AQI (US)
16AQI (US)
23AQI (US)
26AQI (US)
23AQI (US)
30AQI (US)
29AQI (US)
30AQI (US)
26AQI (US)
30AQI (US)
27AQI (US)
34AQI (US)
32AQI (US)
27AQI (US)
27AQI (US)
28AQI (US)
24AQI (US)
25AQI (US)
37AQI (US)
33AQI (US)
40AQI (US)
29AQI (US)
26AQI (US)
42AQI (US)
26AQI (US)
61AQI (US)
32AQI (US)
38AQI (US)
29AQI (US)
29AQI (US)
27AQI (US)
38AQI (US)
47AQI (US)
37AQI (US)
38AQI (US)
34AQI (US)
30AQI (US)
26AQI (US)
24AQI (US)
36AQI (US)
29AQI (US)
36AQI (US)
No. of days
202630AQI (US)
Highest AQI (US) recorded in
May36AQI (US)
Lowest AQI (US) recorded in
April24AQI (US)
202545AQI (US)
Highest AQI (US) recorded in
December56AQI (US)
Lowest AQI (US) recorded in
March32AQI (US)
Most & Least Polluted Years Over the Last 2 Years
East 20th Street's annual 2026 AQI (US) (30) shows an average percentage change of -33.3% (improved AQI (US)) compared to previous years: 2025 (45).