Stilwell, Oklahoma, 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
Stilwell, Oklahoma, United States
AQI Trends: Highest and Lowest
Same Day Analysis (15th February):
On this day, AQI across the 1 years varied significantly: 2026 ranks 1st highest AQI at 36 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 14th Feb - 15th Feb 2026
Stilwell, Oklahoma, United States
7 AM14th Feb 2026
5 PM
6 AM15th Feb 2026
80AQI
22AQI
55AQI
14AQI
In the last 24 hours,
Stilwell's AQI reached its highest point of 80 at 1 PM during the Day, while the lowest point, 14, was recorded at 12 AM during the Night between 14th Feb and 15th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Stilwell, Oklahoma, United States
-1°C-6/3°C
-3°C-10/6°C
-2°C-6/1°C
0°C-10/10°C
7°C2/13°C
5°C-3/14°C
1°C-4/3°C
-10°C-12/-9°C
-12°C-14/-10°C
-12°C-19/-4°C
-4°C-11/5°C
-1°C-7/6°C
4°C-1/12°C
-2°C-6/4°C
-9°C-15/-1°C
-1°C-8/8°C
7°C-2/18°C
9°C3/13°C
2°C-2/6°C
8°C-1/20°C
12°C4/21°C
9°C1/18°C
12°C7/22°C
15°C5/26°C
18°C12/27°C
11°C4/19°C
11°C4/19°C
14°C7/23°C
14°C12/17°C
12°C9/19°C
54AQI
32AQI
50AQI
31AQI
2026 Days Vs Air Quality
Stilwell, Oklahoma, United States
85%
39
15%
7
Total number of days with different AQI categories in last 47 days in 2026 (318 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2026, 85% of 47 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
Stilwell, Oklahoma, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
34AQI (US)
33AQI (US)
51AQI (US)
55AQI (US)
40AQI (US)
28AQI (US)
28AQI (US)
36AQI (US)
16AQI (US)
16AQI (US)
15AQI (US)
19AQI (US)
17AQI (US)
17AQI (US)
14AQI (US)
30AQI (US)
16AQI (US)
15AQI (US)
21AQI (US)
41AQI (US)
50AQI (US)
60AQI (US)
55AQI (US)
36AQI (US)
45AQI (US)
38AQI (US)
35AQI (US)
52AQI (US)
53AQI (US)
54AQI (US)
37AQI (US)
44AQI (US)
44AQI (US)
44AQI (US)
35AQI (US)
40AQI (US)
37AQI (US)
34AQI (US)
36AQI (US)
45AQI (US)
39AQI (US)
34AQI (US)
34AQI (US)
45AQI (US)
40AQI (US)
36AQI (US)
34AQI (US)
39AQI (US)
No. of days
202636AQI (US)
Highest AQI (US) recorded in
February39AQI (US)
Lowest AQI (US) recorded in
January34AQI (US)
202543AQI (US)
Highest AQI (US) recorded in
August49AQI (US)
Lowest AQI (US) recorded in
May31AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Stilwell's annual 2026 AQI (US) (36) shows an average percentage change of -16.1% (improved AQI (US)) compared to previous years: 2025 (43).