Wilton, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
March Air Quality Analysis
Wilton, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (10th March):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 24 of Good air quality, showing improvement over 2025, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 9th Mar - 10th Mar 2026
Wilton, California, United States
6 AM9th Mar 2026
5 PM
5 AM10th Mar 2026
29AQI
12AQI
16AQI
12AQI
In the last 24 hours,
Wilton's AQI reached its highest point of 29 at 12 PM during the Day, while the lowest point, 12, was recorded at 8 PM during the Night between 9th Mar and 10th Mar 2026.
Day & Night AQI Trend : Feb - Mar 2026
Wilton, California, United States
14°C9/22°C
12°C8/17°C
13°C12/18°C
12°C7/19°C
11°C4/21°C
11°C8/15°C
14°C10/20°C
10°C8/12°C
8°C4/11°C
6°C3/10°C
7°C5/11°C
7°C2/13°C
9°C4/17°C
11°C5/19°C
14°C6/22°C
16°C13/22°C
16°C14/20°C
16°C13/22°C
17°C11/27°C
19°C14/27°C
16°C13/20°C
14°C9/21°C
14°C8/22°C
14°C10/21°C
14°C6/23°C
16°C8/25°C
18°C9/30°C
18°C10/26°C
17°C9/27°C
15°C9/24°C
45AQI
28AQI
30AQI
22AQI
2026 Days Vs Air Quality
Wilton, California, United States
87%
60
13%
9
Total number of days with different AQI categories in last 70 days in 2026 (295 days remaining)
Under WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2026, 87% of 70 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
Wilton, California, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI (US)
17AQI (US)
13AQI (US)
15AQI (US)
19AQI (US)
17AQI (US)
17AQI (US)
16AQI (US)
24AQI (US)
36AQI (US)
57AQI (US)
59AQI (US)
52AQI (US)
68AQI (US)
59AQI (US)
59AQI (US)
63AQI (US)
63AQI (US)
55AQI (US)
37AQI (US)
38AQI (US)
35AQI (US)
33AQI (US)
27AQI (US)
22AQI (US)
29AQI (US)
29AQI (US)
30AQI (US)
30AQI (US)
47AQI (US)
29AQI (US)
36AQI (US)
30AQI (US)
30AQI (US)
29AQI (US)
31AQI (US)
35AQI (US)
30AQI (US)
26AQI (US)
37AQI (US)
26AQI (US)
29AQI (US)
42AQI (US)
30AQI (US)
28AQI (US)
30AQI (US)
45AQI (US)
49AQI (US)
44AQI (US)
43AQI (US)
39AQI (US)
29AQI (US)
31AQI (US)
22AQI (US)
21AQI (US)
33AQI (US)
23AQI (US)
21AQI (US)
18AQI (US)
30AQI (US)
46AQI (US)
16AQI (US)
30AQI (US)
30AQI (US)
23AQI (US)
27AQI (US)
18AQI (US)
17AQI (US)
24AQI (US)
36AQI (US)
32AQI (US)
26AQI (US)
No. of days
202633AQI (US)
Highest AQI (US) recorded in
January36AQI (US)
Lowest AQI (US) recorded in
March26AQI (US)
202532AQI (US)
Highest AQI (US) recorded in
January44AQI (US)
Lowest AQI (US) recorded in
March23AQI (US)
202429AQI (US)
Highest AQI (US) recorded in
December41AQI (US)
Lowest AQI (US) recorded in
March22AQI (US)
202332AQI (US)
Highest AQI (US) recorded in
February39AQI (US)
Lowest AQI (US) recorded in
October25AQI (US)
202233AQI (US)
Highest AQI (US) recorded in
January50AQI (US)
Lowest AQI (US) recorded in
March25AQI (US)
202135AQI (US)
Highest AQI (US) recorded in
August65AQI (US)
Lowest AQI (US) recorded in
November18AQI (US)
202046AQI (US)
Highest AQI (US) recorded in
September89AQI (US)
Lowest AQI (US) recorded in
May26AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Wilton's annual 2026 AQI (US) (33) shows an average percentage change of -2.6% (improved AQI (US)) compared to previous years: 2020 (46), 2021 (35), 2022 (33), 2023 (32), 2024 (29), 2025 (32).