Redding, 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
Redding, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (21st October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 35 of Good air quality, showing improvement over 2024 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Oct - 22nd Oct 2025
Redding, California, United States
7 AM21st Oct 2025
6 PM
6 AM22nd Oct 2025
47AQI
26AQI
69AQI
32AQI
In the last 24 hours,
Redding's AQI reached its highest point of 69 at 10 PM during the Night, while the lowest point, 26, was recorded at 10 AM during the Day between 21st Oct and 22nd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Redding, California, United States
28°C21/37°C
30°C19/40°C
27°C19/36°C
26°C18/36°C
29°C21/37°C
26°C18/35°C
21°C17/27°C
18°C16/20°C
17°C16/21°C
16°C14/18°C
18°C14/24°C
19°C13/27°C
20°C14/28°C
22°C16/30°C
23°C15/32°C
23°C13/33°C
22°C12/31°C
17°C16/21°C
16°C12/21°C
14°C8/23°C
16°C10/25°C
12°C8/14°C
15°C9/23°C
12°C9/16°C
17°C8/28°C
21°C14/31°C
18°C11/29°C
18°C10/27°C
21°C14/30°C
20°C11/30°C
--°C/°C
39AQI
28AQI
39AQI
30AQI
2025 Days Vs Air Quality
Redding, California, United States
96%
283
4%
11
Total number of days with different AQI categories in last 295 days in 2025 (70 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 295 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
Redding, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
52AQI
34AQI
38AQI
28AQI
32AQI
28AQI
28AQI
33AQI
35AQI
41AQI
29AQI
29AQI
29AQI
35AQI
48AQI
43AQI
39AQI
41AQI
48AQI
39AQI
44AQI
45AQI
48AQI
48AQI
37AQI
37AQI
46AQI
52AQI
55AQI
56AQI
50AQI
31AQI
26AQI
28AQI
27AQI
30AQI
37AQI
29AQI
30AQI
31AQI
31AQI
31AQI
36AQI
30AQI
27AQI
30AQI
28AQI
31AQI
32AQI
28AQI
28AQI
28AQI
32AQI
26AQI
29AQI
30AQI
30AQI
33AQI
32AQI
33AQI
26AQI
27AQI
33AQI
26AQI
26AQI
28AQI
30AQI
32AQI
28AQI
31AQI
24AQI
23AQI
22AQI
25AQI
26AQI
20AQI
24AQI
25AQI
19AQI
21AQI
19AQI
20AQI
21AQI
24AQI
26AQI
18AQI
24AQI
22AQI
26AQI
21AQI
24AQI
23AQI
21AQI
25AQI
23AQI
27AQI
22AQI
20AQI
21AQI
23AQI
26AQI
19AQI
25AQI
29AQI
31AQI
39AQI
28AQI
28AQI
24AQI
30AQI
22AQI
23AQI
27AQI
42AQI
33AQI
28AQI
22AQI
26AQI
26AQI
28AQI
27AQI
24AQI
21AQI
24AQI
29AQI
26AQI
22AQI
21AQI
23AQI
28AQI
22AQI
19AQI
20AQI
19AQI
21AQI
22AQI
20AQI
22AQI
18AQI
17AQI
25AQI
19AQI
23AQI
24AQI
30AQI
22AQI
23AQI
31AQI
25AQI
24AQI
30AQI
28AQI
24AQI
27AQI
25AQI
26AQI
34AQI
36AQI
37AQI
36AQI
38AQI
35AQI
39AQI
39AQI
33AQI
28AQI
27AQI
25AQI
25AQI
26AQI
26AQI
22AQI
21AQI
20AQI
25AQI
29AQI
27AQI
27AQI
21AQI
25AQI
33AQI
35AQI
30AQI
27AQI
26AQI
29AQI
31AQI
31AQI
32AQI
28AQI
38AQI
51AQI
55AQI
51AQI
54AQI
52AQI
47AQI
45AQI
35AQI
33AQI
31AQI
35AQI
31AQI
29AQI
28AQI
25AQI
27AQI
25AQI
27AQI
30AQI
34AQI
31AQI
34AQI
32AQI
30AQI
29AQI
29AQI
29AQI
23AQI
25AQI
26AQI
29AQI
39AQI
40AQI
41AQI
32AQI
31AQI
23AQI
23AQI
20AQI
22AQI
24AQI
24AQI
37AQI
43AQI
45AQI
37AQI
40AQI
44AQI
40AQI
33AQI
35AQI
31AQI
29AQI
41AQI
48AQI
43AQI
45AQI
39AQI
42AQI
35AQI
23AQI
23AQI
24AQI
31AQI
39AQI
33AQI
22AQI
24AQI
27AQI
30AQI
37AQI
38AQI
31AQI
23AQI
23AQI
29AQI
52AQI
38AQI
35AQI
44AQI
37AQI
30AQI
24AQI
24AQI
36AQI
26AQI
28AQI
20AQI
33AQI
42AQI
51AQI
46AQI
20AQI
31AQI
29AQI
36AQI
26AQI
36AQI
44AQI
47AQI
46AQI
29AQI
35AQI
40AQI
30AQI
25AQI
26AQI
23AQI
29AQI
35AQI
32AQI
34AQI
34AQI
No. of days
202531AQI
Highest AQI recorded in
January40AQI
Lowest AQI recorded in
May23AQI
202431AQI
Highest AQI recorded in
December41AQI
Lowest AQI recorded in
March24AQI
202334AQI
Highest AQI recorded in
August48AQI
Lowest AQI recorded in
January30AQI
202232AQI
Highest AQI recorded in
August44AQI
Lowest AQI recorded in
March28AQI
202149AQI
Highest AQI recorded in
August153AQI
Lowest AQI recorded in
February25AQI
202071AQI
Highest AQI recorded in
October207AQI
Lowest AQI recorded in
December39AQI
Most & Least Polluted Years Over the Last 6 Years
Redding's annual 2025 AQI (31) shows an average percentage change of -22.2% (improved AQI) compared to previous years: 2020 (71), 2021 (49), 2022 (32), 2023 (34), 2024 (31).