Nampa, 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
Nampa, Idaho, United States
AQI Trends: Highest and Lowest
Same Day Analysis (1st October ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 4th highest AQI at 28 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: 1st Oct - 2nd Oct 2025
Nampa, Idaho, United States
7 AM1st Oct 2025
7 PM
6 AM2nd Oct 2025
49AQI
10AQI
37AQI
8AQI
In the last 24 hours,
Nampa's AQI reached its highest point of 49 at 2 PM during the Day, while the lowest point, 8, was recorded at 11 PM during the Night between 1st Oct and 2nd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Nampa, Idaho, United States
28°C16/39°C
27°C17/38°C
27°C18/37°C
26°C15/36°C
23°C17/29°C
23°C14/33°C
23°C14/33°C
22°C14/29°C
20°C12/30°C
19°C11/27°C
19°C11/29°C
21°C13/30°C
19°C12/26°C
16°C9/26°C
19°C9/29°C
20°C8/32°C
21°C9/33°C
22°C12/33°C
22°C12/34°C
21°C15/30°C
18°C11/26°C
18°C7/29°C
19°C7/31°C
20°C9/32°C
19°C13/27°C
18°C7/29°C
19°C8/30°C
21°C15/30°C
17°C13/23°C
17°C12/25°C
--°C/°C
47AQI
42AQI
48AQI
41AQI
2025 Days Vs Air Quality
Nampa, Idaho, United States
70%
192
30%
82
Total number of days with different AQI categories in last 275 days in 2025 (90 days remaining)
Under WHO’s Safe Air Quality Limits: 70%
Health Risk Level:
Low
In 2025, 70% of 275 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Nampa, Idaho, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
39AQI
50AQI
56AQI
49AQI
49AQI
54AQI
52AQI
52AQI
54AQI
54AQI
56AQI
50AQI
53AQI
54AQI
54AQI
55AQI
60AQI
60AQI
61AQI
62AQI
60AQI
59AQI
53AQI
56AQI
55AQI
54AQI
55AQI
57AQI
58AQI
60AQI
56AQI
55AQI
53AQI
55AQI
55AQI
51AQI
54AQI
51AQI
51AQI
58AQI
55AQI
52AQI
55AQI
48AQI
56AQI
51AQI
50AQI
55AQI
57AQI
48AQI
50AQI
57AQI
55AQI
56AQI
57AQI
52AQI
54AQI
51AQI
52AQI
52AQI
55AQI
56AQI
52AQI
55AQI
50AQI
51AQI
53AQI
50AQI
53AQI
55AQI
48AQI
45AQI
51AQI
48AQI
49AQI
55AQI
47AQI
49AQI
44AQI
50AQI
50AQI
55AQI
51AQI
36AQI
35AQI
40AQI
37AQI
33AQI
35AQI
37AQI
31AQI
33AQI
32AQI
31AQI
36AQI
41AQI
33AQI
22AQI
37AQI
45AQI
36AQI
30AQI
29AQI
35AQI
40AQI
36AQI
28AQI
24AQI
28AQI
35AQI
22AQI
27AQI
28AQI
31AQI
36AQI
37AQI
33AQI
31AQI
36AQI
32AQI
38AQI
35AQI
36AQI
24AQI
27AQI
24AQI
25AQI
32AQI
32AQI
30AQI
37AQI
28AQI
21AQI
21AQI
24AQI
22AQI
33AQI
24AQI
27AQI
25AQI
23AQI
29AQI
28AQI
33AQI
32AQI
32AQI
29AQI
36AQI
39AQI
27AQI
34AQI
39AQI
23AQI
24AQI
30AQI
35AQI
43AQI
39AQI
30AQI
39AQI
44AQI
43AQI
34AQI
26AQI
24AQI
24AQI
35AQI
40AQI
42AQI
38AQI
39AQI
34AQI
31AQI
31AQI
38AQI
40AQI
39AQI
35AQI
27AQI
28AQI
35AQI
46AQI
46AQI
41AQI
36AQI
51AQI
43AQI
35AQI
39AQI
40AQI
32AQI
30AQI
39AQI
40AQI
37AQI
35AQI
33AQI
43AQI
52AQI
44AQI
35AQI
25AQI
28AQI
33AQI
36AQI
36AQI
35AQI
26AQI
31AQI
32AQI
38AQI
52AQI
41AQI
38AQI
47AQI
29AQI
28AQI
34AQI
28AQI
22AQI
26AQI
28AQI
29AQI
32AQI
42AQI
34AQI
31AQI
30AQI
19AQI
29AQI
34AQI
35AQI
28AQI
47AQI
60AQI
65AQI
57AQI
58AQI
35AQI
55AQI
53AQI
54AQI
52AQI
54AQI
54AQI
55AQI
55AQI
84AQI
70AQI
49AQI
45AQI
44AQI
50AQI
35AQI
31AQI
44AQI
45AQI
28AQI
31AQI
35AQI
40AQI
40AQI
43AQI
36AQI
29AQI
39AQI
38AQI
46AQI
46AQI
58AQI
63AQI
50AQI
37AQI
28AQI
55AQI
53AQI
48AQI
33AQI
29AQI
34AQI
38AQI
39AQI
46AQI
28AQI
No. of days
202541AQI
Highest AQI recorded in
January55AQI
Lowest AQI recorded in
October28AQI
202445AQI
Highest AQI recorded in
December57AQI
Lowest AQI recorded in
January19AQI
202347AQI
Highest AQI recorded in
February57AQI
Lowest AQI recorded in
December19AQI
202249AQI
Highest AQI recorded in
September71AQI
Lowest AQI recorded in
May30AQI
202146AQI
Highest AQI recorded in
September66AQI
Lowest AQI recorded in
May33AQI
202047AQI
Highest AQI recorded in
September80AQI
Lowest AQI recorded in
March28AQI
Most & Least Polluted Years Over the Last 6 Years
Nampa's annual 2025 AQI (41) shows an average percentage change of -10.6% (improved AQI) compared to previous years: 2020 (47), 2021 (46), 2022 (49), 2023 (47), 2024 (45).