Boulder City, Nevada, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Boulder City, Nevada, United States
AQI Trends: Highest and Lowest
Same Day Analysis (6th September ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 2nd highest AQI at 22 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 6th Sep - 7th Sep 2025
Boulder City, Nevada, United States
6 AM6th Sep 2025
7 PM
5 AM7th Sep 2025
25AQI
18AQI
27AQI
20AQI
In the last 24 hours,
Boulder City's AQI reached its highest point of 27 at 2 AM during the Night, while the lowest point, 18, was recorded at 4 PM during the Day between 6th Sep and 7th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Boulder City, Nevada, United States
34°C21/45°C
34°C21/44°C
33°C21/44°C
32°C20/43°C
34°C22/44°C
34°C22/44°C
33°C20/42°C
31°C21/37°C
30°C20/38°C
29°C17/39°C
30°C17/40°C
33°C21/43°C
34°C23/43°C
35°C22/45°C
35°C23/45°C
35°C26/43°C
34°C24/43°C
29°C22/35°C
29°C22/35°C
29°C21/38°C
28°C21/37°C
28°C21/35°C
31°C21/39°C
32°C23/41°C
33°C23/42°C
31°C24/39°C
32°C25/40°C
30°C21/37°C
28°C23/36°C
30°C23/36°C
--°C/°C
36AQI
33AQI
35AQI
30AQI
2025 Days Vs Air Quality
Boulder City, Nevada, United States
95%
236
5%
13
Total number of days with different AQI categories in last 250 days in 2025 (115 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 250 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
Boulder City, Nevada, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
49AQI
42AQI
50AQI
38AQI
41AQI
43AQI
40AQI
46AQI
46AQI
38AQI
53AQI
39AQI
37AQI
37AQI
37AQI
31AQI
32AQI
39AQI
59AQI
57AQI
39AQI
45AQI
38AQI
41AQI
53AQI
35AQI
37AQI
41AQI
47AQI
54AQI
59AQI
52AQI
37AQI
37AQI
37AQI
30AQI
29AQI
30AQI
31AQI
38AQI
38AQI
39AQI
35AQI
31AQI
30AQI
34AQI
39AQI
37AQI
31AQI
35AQI
37AQI
33AQI
33AQI
38AQI
38AQI
41AQI
38AQI
31AQI
35AQI
45AQI
44AQI
39AQI
34AQI
31AQI
31AQI
30AQI
30AQI
38AQI
32AQI
32AQI
30AQI
23AQI
23AQI
20AQI
25AQI
26AQI
23AQI
26AQI
29AQI
26AQI
28AQI
27AQI
31AQI
21AQI
24AQI
26AQI
30AQI
34AQI
37AQI
29AQI
30AQI
21AQI
17AQI
16AQI
16AQI
17AQI
20AQI
22AQI
26AQI
26AQI
26AQI
26AQI
26AQI
28AQI
25AQI
27AQI
37AQI
35AQI
17AQI
17AQI
19AQI
22AQI
26AQI
30AQI
28AQI
37AQI
15AQI
15AQI
15AQI
20AQI
22AQI
23AQI
26AQI
22AQI
23AQI
23AQI
22AQI
21AQI
21AQI
22AQI
37AQI
30AQI
39AQI
21AQI
17AQI
21AQI
36AQI
32AQI
29AQI
28AQI
30AQI
34AQI
27AQI
30AQI
31AQI
31AQI
29AQI
29AQI
29AQI
30AQI
28AQI
39AQI
23AQI
24AQI
28AQI
25AQI
23AQI
26AQI
26AQI
28AQI
28AQI
33AQI
31AQI
35AQI
31AQI
25AQI
24AQI
29AQI
29AQI
31AQI
33AQI
40AQI
39AQI
40AQI
49AQI
43AQI
42AQI
44AQI
37AQI
37AQI
25AQI
37AQI
32AQI
35AQI
43AQI
46AQI
27AQI
25AQI
41AQI
28AQI
35AQI
53AQI
45AQI
47AQI
48AQI
46AQI
43AQI
35AQI
37AQI
30AQI
25AQI
29AQI
28AQI
21AQI
21AQI
18AQI
18AQI
18AQI
20AQI
25AQI
25AQI
23AQI
22AQI
31AQI
56AQI
61AQI
57AQI
53AQI
43AQI
50AQI
47AQI
49AQI
43AQI
37AQI
52AQI
46AQI
41AQI
39AQI
26AQI
22AQI
24AQI
33AQI
24AQI
39AQI
41AQI
37AQI
37AQI
36AQI
26AQI
28AQI
21AQI
37AQI
39AQI
26AQI
30AQI
33AQI
28AQI
24AQI
22AQI
43AQI
36AQI
30AQI
23AQI
27AQI
32AQI
32AQI
39AQI
27AQI
No. of days
202533AQI
Highest AQI recorded in
January43AQI
Lowest AQI recorded in
April23AQI
202440AQI
Highest AQI recorded in
September54AQI
Lowest AQI recorded in
January5AQI
20237AQI
Highest AQI recorded in
November8AQI
Lowest AQI recorded in
December7AQI
202124AQI
Highest AQI recorded in
January26AQI
Lowest AQI recorded in
February23AQI
202032AQI
Highest AQI recorded in
September50AQI
Lowest AQI recorded in
March21AQI
Most & Least Polluted Years Over the Last 5 Years
Boulder City's annual 2025 AQI (33) shows an average percentage change of 91.6% (worsened AQI) compared to previous years: 2020 (32), 2021 (24), 2023 (7), 2024 (40).