Aspen, Colorado, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
February Air Quality Analysis
Aspen, Colorado, United States
AQI Trends: Highest and Lowest
Same Day Analysis (8th February):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 22 of Good air quality, showing improvement over 2025 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 7th Feb - 8th Feb 2026
Aspen, Colorado, United States
7 AM7th Feb 2026
5 PM
6 AM8th Feb 2026
39AQI
12AQI
40AQI
10AQI
In the last 24 hours,
Aspen's AQI reached its highest point of 40 at 12 AM during the Night, while the lowest point, 10, was recorded at 6 AM during the Night between 7th Feb and 8th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Aspen, Colorado, United States
-13°C-22/-1°C
-7°C-15/5°C
-4°C-10/6°C
-4°C-9/6°C
-3°C-14/5°C
-6°C-16/5°C
-6°C-10/-2°C
-11°C-13/-8°C
-7°C-13/4°C
-5°C-13/1°C
-6°C-13/3°C
-6°C-14/4°C
-5°C-12/3°C
-4°C-10/-1°C
-7°C-19/-4°C
-15°C-23/-9°C
-14°C-25/-2°C
-10°C-18/0°C
-7°C-15/3°C
-6°C-9/-3°C
-7°C-22/0°C
-6°C-15/1°C
-3°C-10/8°C
-3°C-10/4°C
-6°C-19/1°C
-3°C-13/5°C
-2°C-9/9°C
0°C-7/10°C
0°C-5/5°C
1°C-3/7°C
28AQI
19AQI
28AQI
21AQI
2026 Days Vs Air Quality
Aspen, Colorado, United States
100%
39
Total number of days with different AQI categories in last 40 days in 2026 (325 days remaining)
Under WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2026, 100% of 40 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
Aspen, Colorado, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
23AQI (US)
24AQI (US)
22AQI (US)
33AQI (US)
24AQI (US)
16AQI (US)
20AQI (US)
14AQI (US)
16AQI (US)
15AQI (US)
25AQI (US)
18AQI (US)
16AQI (US)
14AQI (US)
18AQI (US)
18AQI (US)
14AQI (US)
24AQI (US)
16AQI (US)
26AQI (US)
27AQI (US)
31AQI (US)
24AQI (US)
33AQI (US)
26AQI (US)
29AQI (US)
23AQI (US)
22AQI (US)
32AQI (US)
20AQI (US)
22AQI (US)
23AQI (US)
31AQI (US)
21AQI (US)
29AQI (US)
30AQI (US)
28AQI (US)
25AQI (US)
22AQI (US)
22AQI (US)
26AQI (US)
No. of days
202623AQI (US)
Highest AQI (US) recorded in
February26AQI (US)
Lowest AQI (US) recorded in
January22AQI (US)
202524AQI (US)
Highest AQI (US) recorded in
August37AQI (US)
Lowest AQI (US) recorded in
October17AQI (US)
202420AQI (US)
Highest AQI (US) recorded in
July37AQI (US)
Lowest AQI (US) recorded in
May9AQI (US)
202321AQI (US)
Highest AQI (US) recorded in
July31AQI (US)
Lowest AQI (US) recorded in
January13AQI (US)
202221AQI (US)
Highest AQI (US) recorded in
September29AQI (US)
Lowest AQI (US) recorded in
July17AQI (US)
202126AQI (US)
Highest AQI (US) recorded in
August50AQI (US)
Lowest AQI (US) recorded in
May14AQI (US)
202025AQI (US)
Highest AQI (US) recorded in
September43AQI (US)
Lowest AQI (US) recorded in
March9AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Aspen's annual 2026 AQI (US) (23) shows an average percentage change of 2.005% (worsened AQI (US)) compared to previous years: 2020 (25), 2021 (26), 2022 (21), 2023 (21), 2024 (20), 2025 (24).