Harlingen, Texas, 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
Harlingen, Texas, United States
AQI Trends: Highest and Lowest
Same Day Analysis (2nd October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 57 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 2nd Oct - 3rd Oct 2025
Harlingen, Texas, United States
7 AM2nd Oct 2025
7 PM
6 AM3rd Oct 2025
61AQI
53AQI
64AQI
55AQI
In the last 24 hours,
Harlingen's AQI reached its highest point of 64 at 2 AM during the Night, while the lowest point, 53, was recorded at 2 PM during the Day between 2nd Oct and 3rd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Harlingen, Texas, United States
31°C25/39°C
31°C25/40°C
32°C26/39°C
31°C28/35°C
28°C26/30°C
28°C26/31°C
30°C26/35°C
29°C26/33°C
30°C27/35°C
29°C27/33°C
29°C26/34°C
29°C25/35°C
30°C26/33°C
28°C25/32°C
28°C25/32°C
28°C25/31°C
28°C26/33°C
29°C25/34°C
28°C24/33°C
29°C25/35°C
30°C25/38°C
31°C26/36°C
28°C25/34°C
28°C23/36°C
28°C23/36°C
26°C20/34°C
26°C20/32°C
26°C20/32°C
27°C20/36°C
27°C21/35°C
--°C/°C
40AQI
40AQI
38AQI
35AQI
2025 Days Vs Air Quality
Harlingen, Texas, United States
53%
101
47%
90
Total number of days with different AQI categories in last 276 days in 2025 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 53%
Health Risk Level:
Considerable
In 2025, 53% of 276 days were within WHO’s safe air quality limits, and 47% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.
Annual Air Quality Insights
Harlingen, Texas, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
52AQI
45AQI
44AQI
62AQI
75AQI
75AQI
67AQI
68AQI
69AQI
67AQI
59AQI
30AQI
31AQI
41AQI
38AQI
40AQI
41AQI
48AQI
40AQI
46AQI
49AQI
49AQI
48AQI
63AQI
67AQI
61AQI
58AQI
56AQI
58AQI
59AQI
62AQI
61AQI
57AQI
58AQI
54AQI
58AQI
57AQI
54AQI
50AQI
41AQI
50AQI
68AQI
65AQI
59AQI
38AQI
40AQI
43AQI
45AQI
45AQI
54AQI
60AQI
68AQI
71AQI
61AQI
71AQI
75AQI
63AQI
58AQI
55AQI
56AQI
63AQI
66AQI
60AQI
51AQI
53AQI
55AQI
50AQI
57AQI
66AQI
57AQI
53AQI
53AQI
55AQI
59AQI
59AQI
63AQI
58AQI
52AQI
56AQI
61AQI
65AQI
60AQI
55AQI
52AQI
56AQI
58AQI
52AQI
48AQI
50AQI
56AQI
52AQI
47AQI
45AQI
36AQI
35AQI
42AQI
49AQI
48AQI
43AQI
50AQI
62AQI
67AQI
64AQI
59AQI
56AQI
52AQI
56AQI
51AQI
47AQI
47AQI
46AQI
53AQI
61AQI
56AQI
39AQI
51AQI
48AQI
47AQI
40AQI
35AQI
28AQI
35AQI
44AQI
48AQI
56AQI
58AQI
55AQI
42AQI
32AQI
35AQI
33AQI
40AQI
35AQI
35AQI
35AQI
36AQI
43AQI
37AQI
30AQI
27AQI
44AQI
56AQI
39AQI
52AQI
50AQI
28AQI
33AQI
41AQI
48AQI
44AQI
33AQI
30AQI
31AQI
52AQI
52AQI
44AQI
53AQI
47AQI
44AQI
43AQI
41AQI
37AQI
31AQI
43AQI
59AQI
49AQI
37AQI
42AQI
35AQI
28AQI
28AQI
34AQI
48AQI
48AQI
35AQI
33AQI
30AQI
30AQI
26AQI
23AQI
22AQI
30AQI
27AQI
40AQI
35AQI
41AQI
48AQI
48AQI
51AQI
57AQI
57AQI
59AQI
53AQI
56AQI
54AQI
50AQI
40AQI
37AQI
57AQI
No. of days
202549AQI
Highest AQI recorded in
March59AQI
Lowest AQI recorded in
September37AQI
Most & Least Polluted Years Over the Last 1 Years
Harlingen's annual 2025 AQI (49) shows an average percentage change of NaN% (improved AQI) compared to previous years: .