Hays, Kansas, 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
Hays, Kansas, United States
AQI Trends: Highest and Lowest
Same Day Analysis (9th February):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 29 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 8th Feb - 9th Feb 2026
Hays, Kansas, United States
7 AM8th Feb 2026
5 PM
6 AM9th Feb 2026
51AQI
10AQI
34AQI
10AQI
In the last 24 hours,
Hays's AQI reached its highest point of 51 at 2 PM during the Day, while the lowest point, 10, was recorded at 1 AM during the Night between 8th Feb and 9th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Hays, Kansas, United States
1°C-2/8°C
6°C1/16°C
10°C5/19°C
5°C0/7°C
5°C-2/16°C
3°C0/6°C
-4°C-8/-2°C
0°C-9/11°C
-1°C-6/4°C
1°C-5/10°C
2°C-4/12°C
0°C-6/8°C
-12°C-18/-11°C
-18°C-20/-15°C
-14°C-21/-6°C
-10°C-19/-2°C
-4°C-7/0°C
-2°C-8/5°C
-4°C-6/1°C
-7°C-12/-4°C
-10°C-20/0°C
4°C-8/18°C
6°C-4/18°C
5°C-1/12°C
4°C0/12°C
9°C0/23°C
10°C5/16°C
7°C-2/20°C
12°C6/22°C
14°C3/27°C
35AQI
17AQI
32AQI
17AQI
2026 Days Vs Air Quality
Hays, Kansas, United States
100%
40
Total number of days with different AQI categories in last 41 days in 2026 (324 days remaining)
Under WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2026, 100% of 41 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
Hays, Kansas, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
17AQI (US)
30AQI (US)
42AQI (US)
25AQI (US)
31AQI (US)
21AQI (US)
24AQI (US)
17AQI (US)
11AQI (US)
10AQI (US)
14AQI (US)
13AQI (US)
17AQI (US)
10AQI (US)
16AQI (US)
37AQI (US)
19AQI (US)
12AQI (US)
12AQI (US)
19AQI (US)
17AQI (US)
36AQI (US)
32AQI (US)
26AQI (US)
24AQI (US)
23AQI (US)
19AQI (US)
23AQI (US)
41AQI (US)
48AQI (US)
22AQI (US)
28AQI (US)
27AQI (US)
26AQI (US)
25AQI (US)
25AQI (US)
25AQI (US)
24AQI (US)
22AQI (US)
29AQI (US)
23AQI (US)
26AQI (US)
No. of days
202623AQI (US)
Highest AQI (US) recorded in
February26AQI (US)
Lowest AQI (US) recorded in
January23AQI (US)
202532AQI (US)
Highest AQI (US) recorded in
August41AQI (US)
Lowest AQI (US) recorded in
January26AQI (US)
202437AQI (US)
Highest AQI (US) recorded in
August64AQI (US)
Lowest AQI (US) recorded in
November18AQI (US)
202338AQI (US)
Highest AQI (US) recorded in
September51AQI (US)
Lowest AQI (US) recorded in
December24AQI (US)
202236AQI (US)
Highest AQI (US) recorded in
April53AQI (US)
Lowest AQI (US) recorded in
January25AQI (US)
202136AQI (US)
Highest AQI (US) recorded in
August55AQI (US)
Lowest AQI (US) recorded in
October22AQI (US)
202034AQI (US)
Highest AQI (US) recorded in
September46AQI (US)
Lowest AQI (US) recorded in
March26AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Hays's annual 2026 AQI (US) (23) shows an average percentage change of -33.9% (improved AQI (US)) compared to previous years: 2020 (34), 2021 (36), 2022 (36), 2023 (38), 2024 (37), 2025 (32).