Pierre, South Dakota, 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
Pierre, South Dakota, United States
AQI Trends: Highest and Lowest
Same Day Analysis (10th February):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 31 of Good air quality, showing improvement over 2025 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 9th Feb - 10th Feb 2026
Pierre, South Dakota, United States
8 AM9th Feb 2026
5 PM
7 AM10th Feb 2026
66AQI
19AQI
46AQI
16AQI
In the last 24 hours,
Pierre's AQI reached its highest point of 66 at 2 PM during the Day, while the lowest point, 16, was recorded at 3 AM during the Night between 9th Feb and 10th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Pierre, South Dakota, United States
6°C0/16°C
8°C4/12°C
1°C-3/2°C
1°C-3/6°C
-3°C-8/-1°C
-12°C-15/-11°C
-6°C-12/-2°C
-12°C-18/-7°C
-9°C-14/-5°C
-6°C-9/-2°C
-12°C-20/-10°C
-23°C-26/-19°C
-17°C-24/-8°C
-17°C-20/-15°C
-12°C-23/2°C
-9°C-13/-2°C
-7°C-12/-1°C
-7°C-10/-3°C
-13°C-16/-9°C
-10°C-19/0°C
0°C-3/5°C
-2°C-5/1°C
-3°C-6/4°C
1°C-2/6°C
8°C-1/19°C
4°C1/6°C
4°C-2/12°C
6°C-2/18°C
5°C-1/13°C
2°C-2/10°C
38AQI
23AQI
38AQI
21AQI
2026 Days Vs Air Quality
Pierre, South Dakota, United States
100%
41
Total number of days with different AQI categories in last 42 days in 2026 (323 days remaining)
Under WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2026, 100% of 42 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
Pierre, South Dakota, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
26AQI (US)
18AQI (US)
23AQI (US)
22AQI (US)
18AQI (US)
19AQI (US)
20AQI (US)
22AQI (US)
17AQI (US)
26AQI (US)
32AQI (US)
35AQI (US)
20AQI (US)
17AQI (US)
18AQI (US)
15AQI (US)
15AQI (US)
23AQI (US)
22AQI (US)
24AQI (US)
17AQI (US)
36AQI (US)
34AQI (US)
28AQI (US)
24AQI (US)
32AQI (US)
27AQI (US)
25AQI (US)
30AQI (US)
42AQI (US)
36AQI (US)
37AQI (US)
27AQI (US)
26AQI (US)
27AQI (US)
32AQI (US)
32AQI (US)
27AQI (US)
29AQI (US)
36AQI (US)
31AQI (US)
25AQI (US)
30AQI (US)
No. of days
202626AQI (US)
Highest AQI (US) recorded in
February30AQI (US)
Lowest AQI (US) recorded in
January25AQI (US)
202531AQI (US)
Highest AQI (US) recorded in
August39AQI (US)
Lowest AQI (US) recorded in
April23AQI (US)
202419AQI (US)
Highest AQI (US) recorded in
July40AQI (US)
Lowest AQI (US) recorded in
April8AQI (US)
202320AQI (US)
Highest AQI (US) recorded in
September39AQI (US)
Lowest AQI (US) recorded in
December8AQI (US)
202212AQI (US)
Highest AQI (US) recorded in
October20AQI (US)
Lowest AQI (US) recorded in
August6AQI (US)
202117AQI (US)
Highest AQI (US) recorded in
July39AQI (US)
Lowest AQI (US) recorded in
November8AQI (US)
202018AQI (US)
Highest AQI (US) recorded in
September26AQI (US)
Lowest AQI (US) recorded in
July14AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Pierre's annual 2026 AQI (US) (26) shows an average percentage change of 45.5% (worsened AQI (US)) compared to previous years: 2020 (18), 2021 (17), 2022 (12), 2023 (20), 2024 (19), 2025 (31).