Normal, Illinois, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
July Air Quality Analysis
Normal, Illinois, United States
AQI Trends: Highest and Lowest
Same Day Analysis (26th July):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 51 of Moderate air quality, showing improvement over 2023 on the same day.
Day & Night AQI Trend: 26th Jul - 27th Jul 2026
Normal, Illinois, United States
5 AM26th Jul 2026
8 PM
4 AM27th Jul 2026
59AQI
42AQI
63AQI
57AQI
In the last 24 hours,
Normal's AQI reached its highest point of 63 at 1 AM during the Night, while the lowest point, 42, was recorded at 5 AM during the Day between 26th Jul and 27th Jul 2026.
Day & Night AQI Trend : Jun - Jul 2026
Normal, Illinois, United States
25°C19/31°C
28°C23/35°C
29°C24/35°C
30°C24/36°C
30°C24/36°C
30°C24/35°C
25°C21/30°C
23°C20/28°C
24°C21/29°C
24°C18/30°C
26°C18/33°C
27°C21/33°C
26°C21/32°C
24°C21/31°C
25°C18/32°C
26°C17/33°C
28°C20/35°C
28°C20/35°C
28°C22/35°C
29°C24/35°C
28°C24/34°C
25°C20/32°C
25°C17/32°C
27°C22/34°C
21°C17/26°C
20°C13/28°C
22°C14/29°C
21°C18/27°C
27°C22/36°C
30°C24/37°C
51AQI
43AQI
53AQI
46AQI
2026 Days Vs Air Quality
Normal, Illinois, United States
90%
183
10%
21
Total number of days with different AQI categories in last 208 days in 2026 (157 days remaining)
Under WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2026, 90% of 208 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
Normal, Illinois, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
18AQI (US)
24AQI (US)
28AQI (US)
44AQI (US)
48AQI (US)
54AQI (US)
50AQI (US)
41AQI (US)
25AQI (US)
23AQI (US)
18AQI (US)
22AQI (US)
24AQI (US)
11AQI (US)
10AQI (US)
20AQI (US)
12AQI (US)
13AQI (US)
23AQI (US)
16AQI (US)
36AQI (US)
59AQI (US)
57AQI (US)
49AQI (US)
52AQI (US)
48AQI (US)
37AQI (US)
44AQI (US)
53AQI (US)
62AQI (US)
42AQI (US)
46AQI (US)
51AQI (US)
48AQI (US)
44AQI (US)
50AQI (US)
46AQI (US)
40AQI (US)
43AQI (US)
47AQI (US)
46AQI (US)
39AQI (US)
38AQI (US)
49AQI (US)
50AQI (US)
48AQI (US)
45AQI (US)
50AQI (US)
45AQI (US)
42AQI (US)
39AQI (US)
37AQI (US)
38AQI (US)
38AQI (US)
46AQI (US)
44AQI (US)
34AQI (US)
34AQI (US)
33AQI (US)
38AQI (US)
56AQI (US)
44AQI (US)
46AQI (US)
44AQI (US)
39AQI (US)
36AQI (US)
40AQI (US)
35AQI (US)
35AQI (US)
41AQI (US)
38AQI (US)
40AQI (US)
36AQI (US)
32AQI (US)
36AQI (US)
34AQI (US)
31AQI (US)
40AQI (US)
43AQI (US)
38AQI (US)
33AQI (US)
40AQI (US)
36AQI (US)
31AQI (US)
30AQI (US)
30AQI (US)
30AQI (US)
30AQI (US)
28AQI (US)
26AQI (US)
30AQI (US)
30AQI (US)
28AQI (US)
31AQI (US)
29AQI (US)
30AQI (US)
28AQI (US)
39AQI (US)
29AQI (US)
33AQI (US)
29AQI (US)
30AQI (US)
32AQI (US)
32AQI (US)
33AQI (US)
30AQI (US)
30AQI (US)
32AQI (US)
29AQI (US)
27AQI (US)
24AQI (US)
25AQI (US)
28AQI (US)
34AQI (US)
26AQI (US)
26AQI (US)
26AQI (US)
28AQI (US)
26AQI (US)
24AQI (US)
22AQI (US)
36AQI (US)
38AQI (US)
30AQI (US)
27AQI (US)
35AQI (US)
30AQI (US)
28AQI (US)
31AQI (US)
29AQI (US)
25AQI (US)
47AQI (US)
51AQI (US)
57AQI (US)
57AQI (US)
56AQI (US)
50AQI (US)
43AQI (US)
44AQI (US)
49AQI (US)
46AQI (US)
44AQI (US)
32AQI (US)
27AQI (US)
17AQI (US)
23AQI (US)
25AQI (US)
27AQI (US)
29AQI (US)
24AQI (US)
21AQI (US)
26AQI (US)
31AQI (US)
31AQI (US)
28AQI (US)
32AQI (US)
28AQI (US)
27AQI (US)
26AQI (US)
25AQI (US)
22AQI (US)
23AQI (US)
24AQI (US)
26AQI (US)
27AQI (US)
27AQI (US)
24AQI (US)
24AQI (US)
24AQI (US)
24AQI (US)
19AQI (US)
24AQI (US)
25AQI (US)
25AQI (US)
33AQI (US)
34AQI (US)
35AQI (US)
39AQI (US)
28AQI (US)
29AQI (US)
30AQI (US)
37AQI (US)
50AQI (US)
52AQI (US)
48AQI (US)
52AQI (US)
37AQI (US)
37AQI (US)
46AQI (US)
48AQI (US)
51AQI (US)
39AQI (US)
54AQI (US)
90AQI (US)
46AQI (US)
47AQI (US)
72AQI (US)
75AQI (US)
53AQI (US)
42AQI (US)
39AQI (US)
41AQI (US)
49AQI (US)
51AQI (US)
34AQI (US)
43AQI (US)
37AQI (US)
30AQI (US)
36AQI (US)
27AQI (US)
48AQI (US)
No. of days
202636AQI (US)
Highest AQI (US) recorded in
July48AQI (US)
Lowest AQI (US) recorded in
June27AQI (US)
202536AQI (US)
Highest AQI (US) recorded in
June48AQI (US)
Lowest AQI (US) recorded in
May26AQI (US)
202433AQI (US)
Highest AQI (US) recorded in
May37AQI (US)
Lowest AQI (US) recorded in
January28AQI (US)
202342AQI (US)
Highest AQI (US) recorded in
June78AQI (US)
Lowest AQI (US) recorded in
December28AQI (US)
202239AQI (US)
Highest AQI (US) recorded in
July45AQI (US)
Lowest AQI (US) recorded in
September34AQI (US)
202139AQI (US)
Highest AQI (US) recorded in
July49AQI (US)
Lowest AQI (US) recorded in
October32AQI (US)
202039AQI (US)
Highest AQI (US) recorded in
April43AQI (US)
Lowest AQI (US) recorded in
May35AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Normal's annual 2026 AQI (US) (36) shows an average percentage change of -4.7% (improved AQI (US)) compared to previous years: 2020 (39), 2021 (39), 2022 (39), 2023 (42), 2024 (33), 2025 (36).