Hayfork, 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!
August Air Quality Analysis
Hayfork, Redding, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (10th August ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 3rd highest AQI at 29 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 10th Aug - 11th Aug 2025
Hayfork, Redding, California, United States
6 AM10th Aug 2025
8 PM
5 AM11th Aug 2025
39AQI
24AQI
34AQI
23AQI
In the last 24 hours,
Hayfork's AQI reached its highest point of 39 at 1 PM during the Day, while the lowest point, 23, was recorded at 10 PM during the Night between 10th Aug and 11th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Hayfork, Redding, California, United States
--°C/°C
28°C19/38°C
29°C21/37°C
27°C20/35°C
26°C21/33°C
25°C16/32°C
24°C17/33°C
24°C16/33°C
22°C15/32°C
18°C12/26°C
20°C13/28°C
21°C13/30°C
21°C14/30°C
22°C15/30°C
21°C14/29°C
20°C11/30°C
21°C12/30°C
22°C13/32°C
23°C14/33°C
22°C14/31°C
21°C13/31°C
20°C12/30°C
18°C11/27°C
16°C8/27°C
19°C10/28°C
18°C11/28°C
20°C11/30°C
25°C15/34°C
28°C20/37°C
28°C20/37°C
28°C16/38°C
39AQI
32AQI
34AQI
29AQI
2025 Days Vs Air Quality
Hayfork, Redding, California, United States
96%
213
4%
9
Total number of days with different AQI categories in last 224 days in 2025 (141 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 224 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
Hayfork, Redding, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
59AQI
41AQI
35AQI
28AQI
37AQI
28AQI
30AQI
39AQI
41AQI
38AQI
29AQI
33AQI
32AQI
43AQI
48AQI
41AQI
41AQI
43AQI
50AQI
44AQI
48AQI
50AQI
53AQI
52AQI
39AQI
41AQI
52AQI
54AQI
53AQI
53AQI
44AQI
30AQI
26AQI
31AQI
31AQI
33AQI
43AQI
32AQI
34AQI
35AQI
36AQI
35AQI
42AQI
30AQI
28AQI
31AQI
28AQI
27AQI
33AQI
29AQI
31AQI
32AQI
33AQI
23AQI
27AQI
32AQI
34AQI
38AQI
36AQI
35AQI
26AQI
28AQI
34AQI
27AQI
29AQI
29AQI
31AQI
30AQI
29AQI
30AQI
22AQI
20AQI
22AQI
22AQI
20AQI
19AQI
23AQI
25AQI
20AQI
23AQI
18AQI
21AQI
21AQI
24AQI
34AQI
21AQI
24AQI
27AQI
29AQI
22AQI
28AQI
27AQI
30AQI
30AQI
28AQI
29AQI
20AQI
24AQI
25AQI
26AQI
24AQI
20AQI
27AQI
31AQI
32AQI
33AQI
26AQI
27AQI
23AQI
27AQI
21AQI
24AQI
29AQI
35AQI
29AQI
25AQI
22AQI
25AQI
24AQI
32AQI
31AQI
29AQI
24AQI
22AQI
23AQI
22AQI
26AQI
24AQI
28AQI
22AQI
20AQI
19AQI
24AQI
20AQI
22AQI
22AQI
20AQI
24AQI
21AQI
18AQI
24AQI
22AQI
22AQI
26AQI
27AQI
22AQI
21AQI
30AQI
22AQI
22AQI
28AQI
30AQI
25AQI
26AQI
25AQI
24AQI
28AQI
29AQI
31AQI
28AQI
31AQI
31AQI
34AQI
32AQI
27AQI
27AQI
24AQI
23AQI
22AQI
26AQI
25AQI
27AQI
26AQI
22AQI
28AQI
31AQI
24AQI
22AQI
21AQI
23AQI
29AQI
33AQI
31AQI
24AQI
24AQI
26AQI
30AQI
29AQI
30AQI
27AQI
41AQI
49AQI
52AQI
49AQI
51AQI
49AQI
49AQI
49AQI
45AQI
40AQI
35AQI
39AQI
41AQI
35AQI
30AQI
23AQI
25AQI
22AQI
24AQI
28AQI
30AQI
26AQI
27AQI
30AQI
28AQI
32AQI
27AQI
27AQI
22AQI
24AQI
23AQI
29AQI
43AQI
32AQI
25AQI
27AQI
23AQI
27AQI
35AQI
27AQI
No. of days
202530AQI
Highest AQI recorded in
January43AQI
Lowest AQI recorded in
May23AQI
202430AQI
Highest AQI recorded in
December44AQI
Lowest AQI recorded in
May21AQI
202332AQI
Highest AQI recorded in
November36AQI
Lowest AQI recorded in
December32AQI
2021180AQI
Highest AQI recorded in
August212AQI
Lowest AQI recorded in
October30AQI
2020104AQI
Highest AQI recorded in
October288AQI
Lowest AQI recorded in
December60AQI
Most & Least Polluted Years Over the Last 5 Years
Hayfork's annual 2025 AQI (30) shows an average percentage change of -40.06% (improved AQI) compared to previous years: 2020 (104), 2021 (180), 2023 (32), 2024 (30).