Old Hardin Road, Billings, Montana, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Old Hardin Road, Billings, Montana, United States
AQI Trends: Highest and Lowest
Same Day Analysis (10th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 44 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 10th Aug - 11th Aug 2025
Old Hardin Road, Billings, Montana, United States
5 AM10th Aug 2025
8 PM
4 AM11th Aug 2025
46AQI
32AQI
48AQI
26AQI
In the last 24 hours,
Old Hardin Road's AQI reached its highest point of 48 at 5 AM during the Night, while the lowest point, 26, was recorded at 2 AM during the Night between 10th Aug and 11th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Old Hardin Road, Billings, Montana, United States
23°C9/34°C
25°C12/36°C
27°C14/38°C
16°C13/16°C
15°C11/22°C
21°C11/31°C
22°C14/31°C
25°C14/36°C
23°C14/33°C
21°C14/30°C
21°C15/28°C
19°C16/27°C
23°C14/32°C
26°C14/36°C
24°C14/35°C
24°C14/34°C
23°C15/30°C
21°C16/27°C
21°C15/27°C
22°C14/31°C
23°C12/34°C
23°C13/33°C
24°C14/32°C
23°C14/33°C
23°C16/31°C
25°C14/34°C
23°C15/32°C
18°C11/27°C
20°C11/28°C
22°C10/31°C
--°C/°C
32AQI
30AQI
30AQI
30AQI
2025 Days Vs Air Quality
Old Hardin Road, Billings, Montana, United States
99%
136
0.7%
1
Total number of days with different AQI categories in last 223 days in 2025 (142 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2025, 99% of 223 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
Old Hardin Road, Billings, Montana, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
20AQI
24AQI
17AQI
17AQI
20AQI
24AQI
18AQI
18AQI
28AQI
25AQI
30AQI
29AQI
26AQI
25AQI
39AQI
42AQI
29AQI
20AQI
28AQI
23AQI
25AQI
15AQI
20AQI
20AQI
16AQI
15AQI
14AQI
20AQI
22AQI
25AQI
16AQI
19AQI
22AQI
19AQI
15AQI
16AQI
24AQI
26AQI
27AQI
18AQI
23AQI
21AQI
17AQI
26AQI
22AQI
17AQI
25AQI
17AQI
16AQI
17AQI
16AQI
15AQI
14AQI
12AQI
13AQI
16AQI
22AQI
15AQI
19AQI
21AQI
15AQI
17AQI
20AQI
18AQI
16AQI
24AQI
23AQI
14AQI
35AQI
18AQI
21AQI
19AQI
29AQI
50AQI
53AQI
43AQI
48AQI
35AQI
27AQI
22AQI
27AQI
21AQI
24AQI
28AQI
33AQI
30AQI
20AQI
18AQI
19AQI
32AQI
26AQI
21AQI
28AQI
23AQI
19AQI
21AQI
25AQI
34AQI
37AQI
33AQI
31AQI
30AQI
27AQI
25AQI
30AQI
30AQI
29AQI
27AQI
30AQI
31AQI
24AQI
36AQI
30AQI
32AQI
29AQI
29AQI
25AQI
31AQI
28AQI
26AQI
35AQI
29AQI
25AQI
26AQI
35AQI
41AQI
39AQI
37AQI
31AQI
29AQI
36AQI
27AQI
31AQI
25AQI
17AQI
21AQI
44AQI
20AQI
23AQI
19AQI
28AQI
30AQI
30AQI
No. of days
202525AQI
Highest AQI recorded in
July30AQI
Lowest AQI recorded in
May19AQI
Most & Least Polluted Years Over the Last 1 Years
Old Hardin Road's annual 2025 AQI (25) shows an average percentage change of NaN% (improved AQI) compared to previous years: .