Nezperce, Lewiston, Idaho, 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
Nezperce, Lewiston, Idaho, United States
AQI Trends: Highest and Lowest
Same Day Analysis (21st October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 32 of Good air quality, showing improvement over 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Oct - 22nd Oct 2025
Nezperce, Lewiston, Idaho, United States
6 AM21st Oct 2025
6 PM
5 AM22nd Oct 2025
61AQI
20AQI
55AQI
23AQI
In the last 24 hours,
Nezperce's AQI reached its highest point of 61 at 4 PM during the Day, while the lowest point, 20, was recorded at 7 AM during the Day between 21st Oct and 22nd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Nezperce, Lewiston, Idaho, United States
12°C5/19°C
15°C6/25°C
19°C10/29°C
19°C10/29°C
14°C8/20°C
15°C5/25°C
18°C9/28°C
18°C12/26°C
13°C10/20°C
13°C8/20°C
12°C7/18°C
11°C7/16°C
9°C5/15°C
9°C5/14°C
9°C2/17°C
11°C2/22°C
15°C7/25°C
18°C10/26°C
17°C10/27°C
9°C6/12°C
6°C4/8°C
6°C2/13°C
7°C2/12°C
6°C1/11°C
6°C1/14°C
9°C4/16°C
7°C0/14°C
9°C5/11°C
6°C2/13°C
9°C3/18°C
--°C/°C
43AQI
33AQI
41AQI
35AQI
2025 Days Vs Air Quality
Nezperce, Lewiston, Idaho, United States
93%
273
7%
21
Total number of days with different AQI categories in last 295 days in 2025 (70 days remaining)
Under WHO’s Safe Air Quality Limits: 93%
Health Risk Level:
Very Low
In 2025, 93% 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
Nezperce, Lewiston, Idaho, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
38AQI
49AQI
37AQI
25AQI
25AQI
31AQI
28AQI
32AQI
35AQI
26AQI
22AQI
26AQI
27AQI
32AQI
44AQI
35AQI
24AQI
28AQI
32AQI
29AQI
37AQI
38AQI
41AQI
41AQI
34AQI
31AQI
38AQI
43AQI
45AQI
47AQI
41AQI
23AQI
36AQI
33AQI
24AQI
23AQI
36AQI
31AQI
29AQI
33AQI
33AQI
32AQI
39AQI
40AQI
30AQI
19AQI
19AQI
25AQI
19AQI
24AQI
26AQI
19AQI
17AQI
13AQI
12AQI
15AQI
17AQI
17AQI
18AQI
20AQI
19AQI
23AQI
18AQI
15AQI
17AQI
19AQI
20AQI
16AQI
12AQI
15AQI
14AQI
19AQI
19AQI
19AQI
15AQI
18AQI
21AQI
21AQI
18AQI
19AQI
16AQI
19AQI
16AQI
21AQI
23AQI
23AQI
21AQI
19AQI
20AQI
19AQI
18AQI
20AQI
21AQI
24AQI
21AQI
22AQI
21AQI
15AQI
15AQI
26AQI
20AQI
17AQI
17AQI
24AQI
19AQI
19AQI
16AQI
17AQI
19AQI
20AQI
12AQI
17AQI
22AQI
23AQI
20AQI
22AQI
26AQI
20AQI
17AQI
16AQI
20AQI
23AQI
29AQI
15AQI
16AQI
18AQI
17AQI
17AQI
22AQI
22AQI
17AQI
15AQI
14AQI
15AQI
16AQI
16AQI
13AQI
13AQI
16AQI
13AQI
14AQI
18AQI
15AQI
17AQI
18AQI
22AQI
19AQI
20AQI
19AQI
16AQI
19AQI
19AQI
16AQI
17AQI
19AQI
20AQI
23AQI
26AQI
30AQI
27AQI
31AQI
30AQI
27AQI
23AQI
21AQI
20AQI
22AQI
23AQI
22AQI
21AQI
20AQI
16AQI
15AQI
19AQI
28AQI
27AQI
22AQI
18AQI
16AQI
16AQI
19AQI
25AQI
27AQI
25AQI
21AQI
30AQI
20AQI
20AQI
23AQI
23AQI
19AQI
19AQI
21AQI
20AQI
24AQI
23AQI
27AQI
32AQI
31AQI
29AQI
26AQI
26AQI
22AQI
25AQI
28AQI
26AQI
22AQI
20AQI
19AQI
20AQI
25AQI
33AQI
30AQI
32AQI
33AQI
27AQI
25AQI
30AQI
19AQI
16AQI
17AQI
20AQI
22AQI
26AQI
28AQI
35AQI
26AQI
23AQI
17AQI
25AQI
32AQI
33AQI
33AQI
49AQI
57AQI
58AQI
57AQI
59AQI
57AQI
56AQI
53AQI
50AQI
57AQI
55AQI
58AQI
63AQI
63AQI
78AQI
84AQI
68AQI
50AQI
50AQI
57AQI
34AQI
28AQI
34AQI
38AQI
18AQI
20AQI
28AQI
29AQI
30AQI
34AQI
33AQI
21AQI
34AQI
35AQI
55AQI
58AQI
72AQI
68AQI
48AQI
31AQI
17AQI
21AQI
27AQI
54AQI
38AQI
22AQI
45AQI
43AQI
36AQI
49AQI
32AQI
27AQI
29AQI
20AQI
36AQI
44AQI
41AQI
37AQI
35AQI
30AQI
32AQI
34AQI
25AQI
19AQI
20AQI
18AQI
22AQI
24AQI
36AQI
46AQI
34AQI
No. of days
202527AQI
Highest AQI recorded in
September46AQI
Lowest AQI recorded in
May18AQI
202433AQI
Highest AQI recorded in
September49AQI
Lowest AQI recorded in
January9AQI
202325AQI
Highest AQI recorded in
August40AQI
Lowest AQI recorded in
December8AQI
202251AQI
Highest AQI recorded in
September79AQI
Lowest AQI recorded in
July19AQI
202149AQI
Highest AQI recorded in
July78AQI
Lowest AQI recorded in
October19AQI
202071AQI
Highest AQI recorded in
September77AQI
Lowest AQI recorded in
August30AQI
Most & Least Polluted Years Over the Last 6 Years
Nezperce's annual 2025 AQI (27) shows an average percentage change of -31.3% (improved AQI) compared to previous years: 2020 (71), 2021 (49), 2022 (51), 2023 (25), 2024 (33).