West 9th Street, Gilroy, California, 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
West 9th Street, Gilroy, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 17 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
West 9th Street, Gilroy, California, United States
6 AM3rd Oct 2025
7 PM
5 AM4th Oct 2025
48AQI
7AQI
40AQI
11AQI
In the last 24 hours,
West 9th Street's AQI reached its highest point of 48 at 3 PM during the Day, while the lowest point, 7, was recorded at 8 AM during the Day between 3rd Oct and 4th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
West 9th Street, Gilroy, California, United States
20°C13/30°C
19°C13/29°C
19°C14/28°C
21°C13/31°C
19°C14/27°C
20°C17/27°C
19°C16/25°C
19°C15/26°C
19°C13/28°C
19°C15/28°C
21°C12/32°C
22°C13/36°C
24°C15/36°C
24°C15/39°C
18°C14/27°C
20°C15/30°C
21°C15/32°C
22°C14/32°C
23°C13/36°C
26°C15/40°C
22°C17/30°C
22°C17/29°C
21°C15/32°C
18°C14/24°C
20°C17/25°C
20°C16/25°C
19°C15/25°C
20°C14/29°C
19°C15/25°C
18°C14/24°C
--°C/°C
37AQI
29AQI
37AQI
32AQI
2025 Days Vs Air Quality
West 9th Street, Gilroy, California, United States
97%
187
3%
5
Total number of days with different AQI categories in last 277 days in 2025 (88 days remaining)
Under WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2025, 97% of 277 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
West 9th Street, Gilroy, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
23AQI
19AQI
27AQI
21AQI
21AQI
22AQI
20AQI
19AQI
20AQI
23AQI
19AQI
22AQI
19AQI
18AQI
18AQI
25AQI
19AQI
32AQI
35AQI
36AQI
30AQI
35AQI
32AQI
29AQI
31AQI
32AQI
33AQI
35AQI
43AQI
40AQI
24AQI
18AQI
17AQI
34AQI
36AQI
32AQI
30AQI
35AQI
24AQI
33AQI
39AQI
49AQI
43AQI
37AQI
24AQI
27AQI
25AQI
22AQI
17AQI
25AQI
35AQI
42AQI
41AQI
41AQI
44AQI
37AQI
38AQI
38AQI
28AQI
33AQI
27AQI
21AQI
24AQI
35AQI
21AQI
33AQI
46AQI
48AQI
48AQI
43AQI
44AQI
44AQI
37AQI
39AQI
37AQI
35AQI
37AQI
44AQI
51AQI
51AQI
48AQI
47AQI
46AQI
38AQI
38AQI
44AQI
44AQI
38AQI
35AQI
36AQI
28AQI
31AQI
33AQI
38AQI
36AQI
33AQI
28AQI
30AQI
27AQI
41AQI
33AQI
45AQI
37AQI
30AQI
26AQI
29AQI
33AQI
45AQI
45AQI
39AQI
31AQI
28AQI
25AQI
22AQI
25AQI
30AQI
23AQI
25AQI
16AQI
16AQI
18AQI
19AQI
18AQI
19AQI
26AQI
32AQI
31AQI
29AQI
25AQI
26AQI
26AQI
39AQI
30AQI
35AQI
31AQI
31AQI
45AQI
36AQI
39AQI
44AQI
40AQI
29AQI
35AQI
25AQI
17AQI
26AQI
33AQI
36AQI
43AQI
50AQI
51AQI
46AQI
42AQI
45AQI
46AQI
44AQI
40AQI
39AQI
33AQI
37AQI
47AQI
42AQI
35AQI
41AQI
37AQI
27AQI
25AQI
23AQI
20AQI
25AQI
34AQI
36AQI
23AQI
26AQI
38AQI
49AQI
54AQI
47AQI
45AQI
39AQI
37AQI
47AQI
52AQI
35AQI
46AQI
48AQI
27AQI
31AQI
36AQI
18AQI
15AQI
17AQI
22AQI
28AQI
33AQI
40AQI
29AQI
36AQI
37AQI
17AQI
No. of days
202533AQI
Highest AQI recorded in
June40AQI
Lowest AQI recorded in
October17AQI
Most & Least Polluted Years Over the Last 1 Years
West 9th Street's annual 2025 AQI (33) shows an average percentage change of NaN% (improved AQI) compared to previous years: .