Klamath Falls, Altamont, Oregon, 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
Klamath Falls, Altamont, Oregon, United States
AQI Trends: Highest and Lowest
Same Day Analysis (4th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 24 of Good air quality, showing improvement over 2024, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Oct - 5th Oct 2025
Klamath Falls, Altamont, Oregon, United States
6 AM4th Oct 2025
7 PM
5 AM5th Oct 2025
27AQI
20AQI
51AQI
19AQI
In the last 24 hours,
Klamath Falls's AQI reached its highest point of 51 at 5 AM during the Night, while the lowest point, 19, was recorded at 11 PM during the Night between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Klamath Falls, Altamont, Oregon, United States
22°C12/31°C
19°C11/28°C
17°C7/26°C
16°C8/25°C
13°C10/18°C
12°C9/17°C
13°C6/18°C
16°C9/23°C
17°C8/27°C
15°C8/21°C
16°C5/26°C
18°C7/29°C
19°C9/29°C
19°C10/30°C
20°C13/28°C
20°C14/28°C
17°C11/25°C
15°C7/25°C
19°C9/29°C
20°C8/30°C
18°C6/28°C
17°C8/26°C
17°C8/27°C
17°C8/26°C
12°C8/16°C
10°C5/16°C
10°C6/17°C
11°C6/17°C
12°C9/17°C
10°C2/17°C
--°C/°C
33AQI
29AQI
33AQI
26AQI
2025 Days Vs Air Quality
Klamath Falls, Altamont, Oregon, United States
90%
250
10%
27
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Under WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2025, 90% of 278 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
Klamath Falls, Altamont, Oregon, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
39AQI
59AQI
34AQI
34AQI
37AQI
41AQI
33AQI
50AQI
54AQI
58AQI
36AQI
46AQI
36AQI
70AQI
67AQI
63AQI
65AQI
54AQI
57AQI
38AQI
64AQI
62AQI
53AQI
67AQI
31AQI
35AQI
45AQI
55AQI
64AQI
73AQI
53AQI
36AQI
36AQI
38AQI
38AQI
36AQI
40AQI
37AQI
58AQI
62AQI
53AQI
66AQI
70AQI
36AQI
31AQI
32AQI
28AQI
18AQI
29AQI
27AQI
31AQI
42AQI
47AQI
19AQI
24AQI
17AQI
34AQI
37AQI
35AQI
34AQI
22AQI
18AQI
27AQI
30AQI
18AQI
22AQI
29AQI
24AQI
29AQI
27AQI
13AQI
19AQI
21AQI
18AQI
17AQI
25AQI
24AQI
28AQI
18AQI
25AQI
18AQI
26AQI
37AQI
25AQI
27AQI
20AQI
31AQI
25AQI
26AQI
23AQI
22AQI
22AQI
30AQI
23AQI
42AQI
48AQI
17AQI
21AQI
36AQI
36AQI
27AQI
26AQI
28AQI
28AQI
38AQI
37AQI
22AQI
22AQI
34AQI
33AQI
20AQI
32AQI
19AQI
33AQI
33AQI
19AQI
23AQI
23AQI
20AQI
22AQI
31AQI
32AQI
17AQI
17AQI
17AQI
15AQI
25AQI
17AQI
28AQI
28AQI
17AQI
19AQI
25AQI
21AQI
23AQI
20AQI
17AQI
18AQI
19AQI
18AQI
21AQI
18AQI
23AQI
22AQI
26AQI
19AQI
20AQI
27AQI
21AQI
29AQI
30AQI
17AQI
17AQI
18AQI
19AQI
20AQI
23AQI
34AQI
33AQI
29AQI
32AQI
37AQI
31AQI
27AQI
25AQI
27AQI
26AQI
21AQI
21AQI
24AQI
27AQI
39AQI
39AQI
34AQI
29AQI
35AQI
31AQI
25AQI
24AQI
23AQI
26AQI
31AQI
30AQI
25AQI
24AQI
39AQI
30AQI
25AQI
30AQI
44AQI
34AQI
30AQI
28AQI
33AQI
27AQI
39AQI
45AQI
61AQI
50AQI
31AQI
23AQI
22AQI
21AQI
23AQI
33AQI
26AQI
24AQI
20AQI
21AQI
21AQI
21AQI
30AQI
32AQI
34AQI
28AQI
31AQI
28AQI
26AQI
24AQI
22AQI
20AQI
22AQI
26AQI
38AQI
36AQI
36AQI
28AQI
32AQI
27AQI
22AQI
22AQI
26AQI
26AQI
34AQI
43AQI
50AQI
34AQI
55AQI
51AQI
38AQI
38AQI
49AQI
53AQI
48AQI
41AQI
38AQI
34AQI
47AQI
47AQI
53AQI
47AQI
25AQI
24AQI
31AQI
44AQI
48AQI
36AQI
19AQI
19AQI
31AQI
31AQI
31AQI
31AQI
21AQI
16AQI
17AQI
23AQI
41AQI
31AQI
19AQI
44AQI
45AQI
23AQI
15AQI
18AQI
21AQI
24AQI
51AQI
38AQI
24AQI
28AQI
22AQI
27AQI
30AQI
33AQI
34AQI
20AQI
No. of days
202532AQI
Highest AQI recorded in
January51AQI
Lowest AQI recorded in
October20AQI
202430AQI
Highest AQI recorded in
August54AQI
Lowest AQI recorded in
May14AQI
202331AQI
Highest AQI recorded in
August61AQI
Lowest AQI recorded in
April14AQI
202228AQI
Highest AQI recorded in
January42AQI
Lowest AQI recorded in
May10AQI
202143AQI
Highest AQI recorded in
August140AQI
Lowest AQI recorded in
May13AQI
202040AQI
Highest AQI recorded in
September84AQI
Lowest AQI recorded in
June14AQI
Most & Least Polluted Years Over the Last 6 Years
Klamath Falls's annual 2025 AQI (32) shows an average percentage change of -5.3% (improved AQI) compared to previous years: 2020 (40), 2021 (43), 2022 (28), 2023 (31), 2024 (30).