Lewiston, Maine, 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
Lewiston, Maine, United States
AQI Trends: Highest and Lowest
Same Day Analysis (15th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 16 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 14th Oct - 15th Oct 2025
Lewiston, Maine, United States
6 AM14th Oct 2025
6 PM
5 AM15th Oct 2025
33AQI
17AQI
36AQI
18AQI
In the last 24 hours,
Lewiston's AQI reached its highest point of 36 at 9 PM during the Night, while the lowest point, 17, was recorded at 8 AM during the Day between 14th Oct and 15th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Lewiston, Maine, United States
--°C/°C
17°C9/25°C
15°C7/23°C
18°C10/27°C
18°C13/24°C
12°C7/18°C
12°C3/20°C
13°C2/25°C
16°C11/25°C
16°C13/20°C
16°C14/17°C
20°C16/28°C
18°C13/24°C
20°C13/30°C
18°C11/28°C
17°C11/25°C
11°C7/19°C
10°C4/18°C
12°C3/24°C
18°C9/29°C
18°C10/29°C
20°C11/31°C
20°C11/30°C
16°C8/18°C
8°C4/14°C
7°C0/18°C
10°C3/21°C
10°C4/19°C
11°C9/13°C
12°C8/19°C
11°C6/16°C
43AQI
35AQI
38AQI
36AQI
2025 Days Vs Air Quality
Lewiston, Maine, United States
90%
183
9%
19
0.4%
1
Total number of days with different AQI categories in last 289 days in 2025 (76 days remaining)
Under WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2025, 90% of 289 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
Lewiston, Maine, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
24AQI
18AQI
30AQI
22AQI
19AQI
17AQI
19AQI
19AQI
16AQI
12AQI
14AQI
19AQI
17AQI
20AQI
24AQI
22AQI
16AQI
19AQI
22AQI
16AQI
18AQI
24AQI
34AQI
23AQI
12AQI
24AQI
17AQI
19AQI
23AQI
19AQI
9AQI
18AQI
31AQI
21AQI
18AQI
25AQI
27AQI
18AQI
19AQI
13AQI
20AQI
15AQI
19AQI
13AQI
18AQI
23AQI
21AQI
23AQI
26AQI
25AQI
18AQI
15AQI
12AQI
12AQI
14AQI
16AQI
11AQI
13AQI
12AQI
14AQI
20AQI
30AQI
23AQI
25AQI
22AQI
14AQI
15AQI
21AQI
34AQI
58AQI
56AQI
46AQI
71AQI
66AQI
36AQI
37AQI
62AQI
35AQI
30AQI
24AQI
29AQI
23AQI
22AQI
26AQI
31AQI
28AQI
31AQI
35AQI
53AQI
49AQI
31AQI
28AQI
23AQI
20AQI
26AQI
31AQI
25AQI
44AQI
37AQI
32AQI
39AQI
54AQI
31AQI
29AQI
27AQI
23AQI
25AQI
18AQI
17AQI
20AQI
38AQI
44AQI
16AQI
29AQI
27AQI
28AQI
17AQI
25AQI
30AQI
49AQI
113AQI
67AQI
57AQI
51AQI
51AQI
71AQI
42AQI
32AQI
59AQI
85AQI
70AQI
48AQI
57AQI
39AQI
33AQI
33AQI
49AQI
60AQI
61AQI
49AQI
32AQI
28AQI
34AQI
19AQI
19AQI
19AQI
20AQI
24AQI
37AQI
35AQI
24AQI
16AQI
21AQI
23AQI
25AQI
19AQI
20AQI
27AQI
29AQI
29AQI
24AQI
27AQI
37AQI
27AQI
24AQI
23AQI
24AQI
28AQI
23AQI
25AQI
28AQI
29AQI
21AQI
25AQI
21AQI
16AQI
18AQI
20AQI
14AQI
16AQI
20AQI
18AQI
18AQI
18AQI
27AQI
29AQI
32AQI
16AQI
14AQI
25AQI
42AQI
51AQI
44AQI
44AQI
18AQI
18AQI
22AQI
30AQI
36AQI
24AQI
20AQI
16AQI
25AQI
19AQI
19AQI
35AQI
38AQI
37AQI
24AQI
28AQI
No. of days
202528AQI
Highest AQI recorded in
July38AQI
Lowest AQI recorded in
May19AQI
Most & Least Polluted Years Over the Last 1 Years
Lewiston's annual 2025 AQI (28) shows an average percentage change of NaN% (improved AQI) compared to previous years: .