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 (14th July):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 47 of Good air quality on the same day.
Day & Night AQI Trend: 14th Jul - 15th Jul 2026
East 20th Street, Signal Hill, California, United States
5 AM14th Jul 2026
8 PM
4 AM15th Jul 2026
73AQI
29AQI
44AQI
22AQI
In the last 24 hours,
East 20th Street's AQI reached its highest point of 73 at 5 AM during the Day, while the lowest point, 22, was recorded at 3 AM during the Night between 14th Jul and 15th Jul 2026.
Day & Night AQI Trend : Jun - Jul 2026
East 20th Street, Signal Hill, California, United States
20°C16/30°C
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
41AQI
27AQI
43AQI
29AQI
2026 Days Vs Air Quality
East 20th Street, Signal Hill, California, United States
97%
186
3%
6
Total number of days with different AQI categories in last 196 days in 2026 (169 days remaining)
Under WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2026, 97% of 196 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)
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).