Research Triangle Park, Durham, North Carolina, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Research Triangle Park, Durham, North Carolina, United States
AQI Trends: Highest and Lowest
Same Day Analysis (19th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 49 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 19th Oct - 20th Oct 2025
Research Triangle Park, Durham, North Carolina, United States
7 AM19th Oct 2025
6 PM
6 AM20th Oct 2025
56AQI
11AQI
23AQI
9AQI
In the last 24 hours,
Research Triangle Park's AQI reached its highest point of 56 at 9 AM during the Day, while the lowest point, undefined, was recorded at 6 AM during the Night between 19th Oct and 20th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Research Triangle Park, Durham, North Carolina, United States
25°C20/31°C
24°C16/33°C
22°C15/32°C
24°C14/34°C
26°C18/36°C
27°C22/34°C
26°C22/32°C
23°C21/26°C
23°C20/26°C
20°C19/22°C
21°C18/26°C
19°C15/24°C
16°C10/24°C
16°C9/25°C
18°C10/28°C
19°C11/27°C
21°C14/31°C
22°C14/32°C
23°C18/30°C
17°C11/24°C
15°C10/20°C
16°C12/22°C
17°C15/18°C
17°C15/23°C
17°C13/23°C
18°C12/26°C
16°C11/24°C
13°C5/23°C
16°C7/28°C
19°C14/28°C
--°C/°C
40AQI
35AQI
42AQI
35AQI
2025 Days Vs Air Quality
Research Triangle Park, Durham, North Carolina, United States
87%
181
13%
26
Total number of days with different AQI categories in last 293 days in 2025 (72 days remaining)
Under WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2025, 87% of 293 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
Research Triangle Park, Durham, North Carolina, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI
41AQI
39AQI
34AQI
36AQI
20AQI
30AQI
47AQI
50AQI
51AQI
34AQI
37AQI
23AQI
20AQI
30AQI
26AQI
19AQI
22AQI
40AQI
40AQI
23AQI
32AQI
50AQI
43AQI
51AQI
53AQI
54AQI
48AQI
52AQI
53AQI
41AQI
24AQI
25AQI
35AQI
52AQI
56AQI
45AQI
34AQI
21AQI
33AQI
30AQI
33AQI
44AQI
29AQI
24AQI
34AQI
28AQI
20AQI
31AQI
43AQI
54AQI
35AQI
27AQI
27AQI
33AQI
36AQI
27AQI
18AQI
21AQI
25AQI
31AQI
20AQI
17AQI
30AQI
27AQI
36AQI
50AQI
37AQI
36AQI
49AQI
38AQI
44AQI
36AQI
36AQI
35AQI
33AQI
46AQI
45AQI
36AQI
30AQI
34AQI
32AQI
29AQI
35AQI
34AQI
28AQI
41AQI
45AQI
57AQI
60AQI
62AQI
53AQI
53AQI
45AQI
50AQI
48AQI
38AQI
32AQI
32AQI
54AQI
67AQI
35AQI
32AQI
54AQI
49AQI
33AQI
34AQI
45AQI
39AQI
38AQI
31AQI
31AQI
35AQI
35AQI
34AQI
28AQI
42AQI
39AQI
55AQI
43AQI
44AQI
49AQI
51AQI
30AQI
41AQI
35AQI
41AQI
34AQI
29AQI
36AQI
39AQI
39AQI
30AQI
45AQI
82AQI
52AQI
36AQI
24AQI
21AQI
26AQI
28AQI
33AQI
40AQI
46AQI
46AQI
29AQI
27AQI
29AQI
25AQI
33AQI
35AQI
37AQI
29AQI
27AQI
35AQI
39AQI
37AQI
29AQI
26AQI
24AQI
35AQI
45AQI
49AQI
56AQI
44AQI
31AQI
30AQI
26AQI
27AQI
37AQI
40AQI
48AQI
52AQI
42AQI
31AQI
24AQI
37AQI
56AQI
56AQI
41AQI
44AQI
49AQI
39AQI
39AQI
20AQI
27AQI
29AQI
34AQI
50AQI
39AQI
38AQI
48AQI
46AQI
48AQI
40AQI
31AQI
29AQI
42AQI
31AQI
14AQI
26AQI
22AQI
33AQI
44AQI
46AQI
52AQI
49AQI
34AQI
38AQI
31AQI
42AQI
40AQI
35AQI
38AQI
38AQI
No. of days
202537AQI
Highest AQI recorded in
June42AQI
Lowest AQI recorded in
May31AQI
Most & Least Polluted Years Over the Last 1 Years
Research Triangle Park's annual 2025 AQI (37) shows an average percentage change of NaN% (improved AQI) compared to previous years: .