Yreka, 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
Yreka, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (24th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 36 of Good air quality, showing improvement over 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 24th Oct - 25th Oct 2025
Yreka, California, United States
7 AM24th Oct 2025
6 PM
6 AM25th Oct 2025
39AQI
26AQI
23AQI
15AQI
In the last 24 hours,
Yreka's AQI reached its highest point of 39 at 10 AM during the Day, while the lowest point, undefined, was recorded at 6 AM during the Night between 24th Oct and 25th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Yreka, California, United States
24°C16/34°C
23°C13/33°C
23°C16/33°C
21°C13/30°C
17°C12/21°C
14°C11/20°C
15°C12/20°C
15°C11/20°C
15°C10/21°C
15°C9/25°C
17°C10/27°C
19°C10/29°C
19°C11/28°C
18°C11/27°C
12°C8/17°C
10°C7/13°C
10°C6/16°C
10°C7/15°C
8°C5/11°C
12°C5/19°C
12°C7/19°C
14°C7/23°C
17°C11/25°C
16°C10/25°C
14°C10/19°C
14°C6/24°C
16°C9/25°C
15°C10/22°C
14°C8/24°C
14°C8/23°C
--°C/°C
34AQI
29AQI
36AQI
29AQI
2025 Days Vs Air Quality
Yreka, California, United States
95%
282
5%
15
Total number of days with different AQI categories in last 298 days in 2025 (67 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 298 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
Yreka, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
43AQI
37AQI
33AQI
27AQI
31AQI
29AQI
32AQI
39AQI
43AQI
42AQI
32AQI
34AQI
34AQI
48AQI
52AQI
50AQI
47AQI
46AQI
51AQI
43AQI
52AQI
55AQI
54AQI
52AQI
38AQI
41AQI
51AQI
56AQI
59AQI
59AQI
44AQI
35AQI
34AQI
38AQI
38AQI
34AQI
42AQI
34AQI
37AQI
38AQI
34AQI
38AQI
44AQI
33AQI
29AQI
28AQI
28AQI
27AQI
35AQI
31AQI
33AQI
35AQI
40AQI
27AQI
28AQI
29AQI
38AQI
41AQI
42AQI
39AQI
27AQI
29AQI
34AQI
28AQI
25AQI
31AQI
34AQI
28AQI
28AQI
33AQI
23AQI
20AQI
21AQI
20AQI
18AQI
18AQI
22AQI
24AQI
18AQI
22AQI
18AQI
25AQI
24AQI
28AQI
29AQI
23AQI
23AQI
25AQI
27AQI
21AQI
24AQI
25AQI
25AQI
28AQI
27AQI
26AQI
20AQI
21AQI
24AQI
26AQI
22AQI
21AQI
27AQI
29AQI
33AQI
29AQI
27AQI
26AQI
24AQI
24AQI
19AQI
23AQI
24AQI
31AQI
27AQI
21AQI
22AQI
23AQI
21AQI
23AQI
29AQI
28AQI
21AQI
20AQI
20AQI
19AQI
23AQI
21AQI
23AQI
21AQI
21AQI
21AQI
20AQI
19AQI
21AQI
21AQI
19AQI
21AQI
21AQI
17AQI
21AQI
20AQI
23AQI
27AQI
23AQI
20AQI
20AQI
29AQI
21AQI
23AQI
29AQI
29AQI
24AQI
23AQI
23AQI
25AQI
27AQI
25AQI
29AQI
31AQI
30AQI
30AQI
31AQI
31AQI
29AQI
26AQI
24AQI
23AQI
21AQI
32AQI
25AQI
23AQI
22AQI
20AQI
27AQI
30AQI
23AQI
21AQI
20AQI
22AQI
25AQI
29AQI
32AQI
25AQI
25AQI
27AQI
28AQI
28AQI
31AQI
34AQI
36AQI
31AQI
34AQI
36AQI
32AQI
35AQI
43AQI
46AQI
43AQI
37AQI
25AQI
25AQI
30AQI
29AQI
30AQI
25AQI
25AQI
20AQI
23AQI
25AQI
26AQI
29AQI
30AQI
28AQI
28AQI
26AQI
25AQI
25AQI
21AQI
21AQI
23AQI
27AQI
30AQI
35AQI
34AQI
29AQI
27AQI
22AQI
18AQI
19AQI
22AQI
24AQI
23AQI
34AQI
40AQI
46AQI
35AQI
49AQI
49AQI
37AQI
35AQI
37AQI
40AQI
35AQI
48AQI
49AQI
47AQI
51AQI
51AQI
51AQI
42AQI
27AQI
24AQI
24AQI
36AQI
45AQI
26AQI
20AQI
22AQI
26AQI
29AQI
29AQI
32AQI
23AQI
19AQI
24AQI
28AQI
42AQI
31AQI
24AQI
51AQI
43AQI
15AQI
17AQI
21AQI
24AQI
24AQI
26AQI
26AQI
27AQI
25AQI
23AQI
26AQI
31AQI
31AQI
29AQI
32AQI
40AQI
41AQI
47AQI
47AQI
34AQI
44AQI
48AQI
51AQI
40AQI
36AQI
44AQI
35AQI
25AQI
25AQI
22AQI
26AQI
30AQI
30AQI
34AQI
33AQI
No. of days
202530AQI
Highest AQI recorded in
January44AQI
Lowest AQI recorded in
May22AQI
202430AQI
Highest AQI recorded in
December45AQI
Lowest AQI recorded in
May21AQI
202363AQI
Highest AQI recorded in
August176AQI
Lowest AQI recorded in
December27AQI
202235AQI
Highest AQI recorded in
August47AQI
Lowest AQI recorded in
April27AQI
202152AQI
Highest AQI recorded in
August102AQI
Lowest AQI recorded in
October23AQI
202087AQI
Highest AQI recorded in
September137AQI
Lowest AQI recorded in
November51AQI
Most & Least Polluted Years Over the Last 6 Years
Yreka's annual 2025 AQI (30) shows an average percentage change of -34.4% (improved AQI) compared to previous years: 2020 (87), 2021 (52), 2022 (35), 2023 (63), 2024 (30).