Fort Collins, Colorado, 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
Fort Collins, Colorado, United States
AQI Trends: Highest and Lowest
Same Day Analysis (14th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 33 of Good air quality, showing improvement over 2025 on the same day.
Day & Night AQI Trend: 14th Aug - 15th Aug 2026
Fort Collins, Colorado, United States
5 AM14th Aug 2026
8 PM
4 AM15th Aug 2026
40AQI
20AQI
47AQI
22AQI
In the last 24 hours,
Fort Collins's AQI reached its highest point of 47 at 9 PM during the Night, while the lowest point, 20, was recorded at 5 PM during the Day between 14th Aug and 15th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Fort Collins, Colorado, United States
26°C16/35°C
27°C18/36°C
26°C17/36°C
28°C20/39°C
27°C20/35°C
23°C18/34°C
24°C20/30°C
27°C18/37°C
28°C20/40°C
29°C22/38°C
26°C21/31°C
23°C18/33°C
22°C17/33°C
26°C17/34°C
27°C17/36°C
26°C16/37°C
28°C18/38°C
28°C19/38°C
19°C13/25°C
19°C9/29°C
25°C13/37°C
27°C17/38°C
28°C17/38°C
27°C20/36°C
26°C19/35°C
25°C20/35°C
24°C18/35°C
20°C14/27°C
20°C13/31°C
20°C15/29°C
41AQI
38AQI
41AQI
39AQI
2026 Days Vs Air Quality
Fort Collins, Colorado, United States
97%
217
3%
6
Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)
Under WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2026, 97% of 227 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
Fort Collins, Colorado, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
28AQI (US)
21AQI (US)
17AQI (US)
19AQI (US)
23AQI (US)
16AQI (US)
21AQI (US)
14AQI (US)
17AQI (US)
19AQI (US)
20AQI (US)
29AQI (US)
18AQI (US)
12AQI (US)
19AQI (US)
24AQI (US)
14AQI (US)
16AQI (US)
24AQI (US)
44AQI (US)
18AQI (US)
28AQI (US)
28AQI (US)
34AQI (US)
21AQI (US)
25AQI (US)
30AQI (US)
31AQI (US)
41AQI (US)
38AQI (US)
26AQI (US)
23AQI (US)
23AQI (US)
25AQI (US)
24AQI (US)
26AQI (US)
25AQI (US)
25AQI (US)
30AQI (US)
26AQI (US)
24AQI (US)
25AQI (US)
29AQI (US)
24AQI (US)
28AQI (US)
20AQI (US)
25AQI (US)
27AQI (US)
24AQI (US)
23AQI (US)
19AQI (US)
19AQI (US)
23AQI (US)
24AQI (US)
27AQI (US)
30AQI (US)
18AQI (US)
20AQI (US)
16AQI (US)
24AQI (US)
33AQI (US)
23AQI (US)
22AQI (US)
18AQI (US)
31AQI (US)
21AQI (US)
21AQI (US)
28AQI (US)
20AQI (US)
23AQI (US)
21AQI (US)
40AQI (US)
23AQI (US)
25AQI (US)
21AQI (US)
21AQI (US)
20AQI (US)
23AQI (US)
21AQI (US)
15AQI (US)
17AQI (US)
19AQI (US)
18AQI (US)
22AQI (US)
25AQI (US)
19AQI (US)
27AQI (US)
18AQI (US)
23AQI (US)
24AQI (US)
33AQI (US)
24AQI (US)
22AQI (US)
20AQI (US)
18AQI (US)
24AQI (US)
27AQI (US)
30AQI (US)
25AQI (US)
30AQI (US)
22AQI (US)
18AQI (US)
16AQI (US)
20AQI (US)
22AQI (US)
16AQI (US)
25AQI (US)
15AQI (US)
20AQI (US)
22AQI (US)
19AQI (US)
21AQI (US)
17AQI (US)
16AQI (US)
17AQI (US)
25AQI (US)
16AQI (US)
16AQI (US)
14AQI (US)
12AQI (US)
13AQI (US)
19AQI (US)
29AQI (US)
25AQI (US)
15AQI (US)
23AQI (US)
25AQI (US)
16AQI (US)
26AQI (US)
33AQI (US)
24AQI (US)
22AQI (US)
22AQI (US)
23AQI (US)
34AQI (US)
29AQI (US)
25AQI (US)
19AQI (US)
25AQI (US)
29AQI (US)
20AQI (US)
16AQI (US)
19AQI (US)
16AQI (US)
14AQI (US)
13AQI (US)
13AQI (US)
18AQI (US)
16AQI (US)
17AQI (US)
15AQI (US)
18AQI (US)
19AQI (US)
21AQI (US)
19AQI (US)
21AQI (US)
20AQI (US)
15AQI (US)
15AQI (US)
23AQI (US)
19AQI (US)
16AQI (US)
21AQI (US)
32AQI (US)
42AQI (US)
31AQI (US)
31AQI (US)
38AQI (US)
20AQI (US)
27AQI (US)
26AQI (US)
22AQI (US)
17AQI (US)
16AQI (US)
16AQI (US)
32AQI (US)
21AQI (US)
27AQI (US)
33AQI (US)
35AQI (US)
31AQI (US)
22AQI (US)
23AQI (US)
35AQI (US)
38AQI (US)
24AQI (US)
16AQI (US)
15AQI (US)
16AQI (US)
19AQI (US)
22AQI (US)
22AQI (US)
24AQI (US)
25AQI (US)
34AQI (US)
38AQI (US)
33AQI (US)
44AQI (US)
44AQI (US)
33AQI (US)
33AQI (US)
35AQI (US)
37AQI (US)
33AQI (US)
33AQI (US)
38AQI (US)
40AQI (US)
35AQI (US)
34AQI (US)
42AQI (US)
34AQI (US)
53AQI (US)
59AQI (US)
57AQI (US)
55AQI (US)
58AQI (US)
52AQI (US)
42AQI (US)
42AQI (US)
33AQI (US)
31AQI (US)
35AQI (US)
33AQI (US)
24AQI (US)
24AQI (US)
23AQI (US)
21AQI (US)
21AQI (US)
22AQI (US)
30AQI (US)
45AQI (US)
No. of days
202625AQI (US)
Highest AQI (US) recorded in
August45AQI (US)
Lowest AQI (US) recorded in
May21AQI (US)
202531AQI (US)
Highest AQI (US) recorded in
August43AQI (US)
Lowest AQI (US) recorded in
March21AQI (US)
202427AQI (US)
Highest AQI (US) recorded in
October41AQI (US)
Lowest AQI (US) recorded in
May15AQI (US)
202326AQI (US)
Highest AQI (US) recorded in
January40AQI (US)
Lowest AQI (US) recorded in
June18AQI (US)
202228AQI (US)
Highest AQI (US) recorded in
August38AQI (US)
Lowest AQI (US) recorded in
July20AQI (US)
202135AQI (US)
Highest AQI (US) recorded in
August59AQI (US)
Lowest AQI (US) recorded in
May24AQI (US)
202039AQI (US)
Highest AQI (US) recorded in
September63AQI (US)
Lowest AQI (US) recorded in
June20AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Fort Collins's annual 2026 AQI (US) (25) shows an average percentage change of -17.6% (improved AQI (US)) compared to previous years: 2020 (39), 2021 (35), 2022 (28), 2023 (26), 2024 (27), 2025 (31).