Healdsburg, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Healdsburg, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (10th August ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 2nd highest AQI at 27 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 11th Aug - 12th Aug 2025
Healdsburg, California, United States
6 AM11th Aug 2025
8 PM
5 AM12th Aug 2025
32AQI
23AQI
35AQI
31AQI
In the last 24 hours,
Healdsburg's AQI reached its highest point of 35 at 9 PM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 11th Aug and 12th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Healdsburg, California, United States
19°C11/31°C
21°C10/33°C
18°C10/28°C
16°C11/22°C
18°C11/29°C
19°C11/30°C
19°C9/30°C
20°C10/31°C
18°C11/28°C
16°C9/24°C
17°C11/24°C
17°C11/26°C
17°C11/26°C
18°C11/25°C
19°C10/29°C
22°C11/33°C
23°C14/34°C
21°C13/32°C
22°C12/33°C
23°C13/33°C
24°C14/35°C
23°C14/34°C
22°C13/34°C
22°C13/32°C
25°C14/37°C
26°C15/36°C
27°C17/39°C
25°C18/36°C
24°C16/36°C
22°C14/33°C
--°C/°C
21AQI
21AQI
23AQI
21AQI
2025 Days Vs Air Quality
Healdsburg, California, United States
100%
221
0.4%
1
Total number of days with different AQI categories in last 224 days in 2025 (141 days remaining)
Under WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2025, 100% of 224 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
Healdsburg, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
38AQI
31AQI
41AQI
26AQI
33AQI
25AQI
21AQI
24AQI
33AQI
36AQI
30AQI
25AQI
31AQI
31AQI
46AQI
44AQI
42AQI
44AQI
48AQI
38AQI
41AQI
47AQI
49AQI
46AQI
39AQI
39AQI
41AQI
50AQI
46AQI
54AQI
45AQI
29AQI
21AQI
21AQI
22AQI
23AQI
27AQI
22AQI
25AQI
27AQI
33AQI
32AQI
36AQI
26AQI
28AQI
26AQI
26AQI
22AQI
25AQI
23AQI
22AQI
24AQI
28AQI
22AQI
20AQI
22AQI
26AQI
29AQI
33AQI
30AQI
20AQI
19AQI
21AQI
22AQI
21AQI
27AQI
33AQI
32AQI
27AQI
26AQI
20AQI
20AQI
18AQI
22AQI
19AQI
15AQI
18AQI
19AQI
17AQI
23AQI
18AQI
21AQI
20AQI
25AQI
28AQI
20AQI
22AQI
20AQI
23AQI
20AQI
22AQI
18AQI
20AQI
22AQI
26AQI
19AQI
14AQI
17AQI
17AQI
18AQI
20AQI
22AQI
24AQI
24AQI
26AQI
24AQI
20AQI
23AQI
26AQI
19AQI
20AQI
31AQI
36AQI
31AQI
19AQI
19AQI
17AQI
20AQI
27AQI
28AQI
33AQI
25AQI
17AQI
20AQI
24AQI
29AQI
36AQI
22AQI
24AQI
20AQI
18AQI
16AQI
16AQI
20AQI
24AQI
26AQI
23AQI
20AQI
18AQI
16AQI
27AQI
21AQI
17AQI
27AQI
20AQI
15AQI
21AQI
23AQI
18AQI
22AQI
34AQI
43AQI
46AQI
35AQI
30AQI
24AQI
19AQI
18AQI
20AQI
25AQI
27AQI
27AQI
36AQI
37AQI
35AQI
36AQI
28AQI
26AQI
24AQI
30AQI
30AQI
23AQI
20AQI
24AQI
23AQI
20AQI
20AQI
23AQI
25AQI
24AQI
21AQI
21AQI
20AQI
24AQI
25AQI
29AQI
27AQI
20AQI
21AQI
18AQI
22AQI
33AQI
34AQI
25AQI
19AQI
20AQI
23AQI
20AQI
17AQI
19AQI
18AQI
22AQI
16AQI
15AQI
15AQI
15AQI
15AQI
16AQI
18AQI
20AQI
23AQI
22AQI
22AQI
20AQI
28AQI
30AQI
27AQI
32AQI
24AQI
27AQI
28AQI
27AQI
38AQI
26AQI
22AQI
22AQI
22AQI
27AQI
21AQI
27AQI
No. of days
202526AQI
Highest AQI recorded in
January38AQI
Lowest AQI recorded in
July21AQI
202431AQI
Highest AQI recorded in
January48AQI
Lowest AQI recorded in
May21AQI
202337AQI
Highest AQI recorded in
November49AQI
Lowest AQI recorded in
December36AQI
202265AQI
Highest AQI recorded in
April151AQI
Lowest AQI recorded in
October34AQI
202130AQI
Highest AQI recorded in
September49AQI
Lowest AQI recorded in
November20AQI
202085AQI
Highest AQI recorded in
October156AQI
Lowest AQI recorded in
November46AQI
Most & Least Polluted Years Over the Last 6 Years
Healdsburg's annual 2025 AQI (26) shows an average percentage change of -38.3% (improved AQI) compared to previous years: 2020 (85), 2021 (30), 2022 (65), 2023 (37), 2024 (31).