Rennes, Bretagne, France Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Rennes, Bretagne, France
AQI Trends: Highest and Lowest
Same Day Analysis (29th September):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 37 of Good air quality on the same day.
Day & Night AQI Trend: 29th Sep - 30th Sep 2026
Rennes, Bretagne, France
7 AM29th Sep 2026
8 PM
6 AM30th Sep 2026
44AQI
22AQI
44AQI
22AQI
In the last 24 hours,
Rennes's AQI reached its highest point of 44 at 7 AM during the Night, while the lowest point, 22, was recorded at 1 AM during the Night between 29th Sep and 30th Sep 2026.
Day & Night AQI Trend : Sep 2026
Rennes, Bretagne, France
17°C12/24°C
19°C13/25°C
21°C16/28°C
21°C16/28°C
19°C13/27°C
22°C15/32°C
20°C16/26°C
16°C13/21°C
15°C10/20°C
16°C10/23°C
17°C12/24°C
18°C13/26°C
20°C14/29°C
21°C15/30°C
19°C12/27°C
16°C11/22°C
14°C10/20°C
15°C9/22°C
17°C11/25°C
18°C13/25°C
18°C13/26°C
19°C12/27°C
19°C14/27°C
20°C13/29°C
20°C14/29°C
16°C13/22°C
17°C13/22°C
16°C14/18°C
20°C16/27°C
20°C16/23°C
33AQI
22AQI
28AQI
23AQI
2026 Days Vs Air Quality
Rennes, Bretagne, France
94%
254
5%
14
0.3%
1
Total number of days with different AQI categories in last 273 days in 2026 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2026, 94% of 273 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
Rennes, Bretagne, France
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
86AQI (US)
29AQI (US)
58AQI (US)
73AQI (US)
43AQI (US)
40AQI (US)
40AQI (US)
20AQI (US)
17AQI (US)
17AQI (US)
44AQI (US)
12AQI (US)
26AQI (US)
42AQI (US)
17AQI (US)
18AQI (US)
29AQI (US)
38AQI (US)
37AQI (US)
25AQI (US)
15AQI (US)
28AQI (US)
46AQI (US)
30AQI (US)
38AQI (US)
35AQI (US)
20AQI (US)
42AQI (US)
38AQI (US)
41AQI (US)
32AQI (US)
38AQI (US)
32AQI (US)
21AQI (US)
16AQI (US)
30AQI (US)
33AQI (US)
33AQI (US)
35AQI (US)
32AQI (US)
22AQI (US)
38AQI (US)
32AQI (US)
14AQI (US)
42AQI (US)
17AQI (US)
28AQI (US)
37AQI (US)
30AQI (US)
34AQI (US)
36AQI (US)
16AQI (US)
30AQI (US)
32AQI (US)
30AQI (US)
42AQI (US)
38AQI (US)
20AQI (US)
25AQI (US)
30AQI (US)
42AQI (US)
52AQI (US)
52AQI (US)
51AQI (US)
50AQI (US)
74AQI (US)
60AQI (US)
38AQI (US)
25AQI (US)
19AQI (US)
37AQI (US)
23AQI (US)
28AQI (US)
29AQI (US)
32AQI (US)
32AQI (US)
26AQI (US)
41AQI (US)
73AQI (US)
109AQI (US)
76AQI (US)
71AQI (US)
67AQI (US)
26AQI (US)
18AQI (US)
25AQI (US)
28AQI (US)
27AQI (US)
22AQI (US)
28AQI (US)
24AQI (US)
26AQI (US)
26AQI (US)
26AQI (US)
30AQI (US)
25AQI (US)
26AQI (US)
30AQI (US)
41AQI (US)
26AQI (US)
22AQI (US)
16AQI (US)
23AQI (US)
25AQI (US)
27AQI (US)
28AQI (US)
26AQI (US)
26AQI (US)
24AQI (US)
23AQI (US)
24AQI (US)
23AQI (US)
28AQI (US)
29AQI (US)
23AQI (US)
26AQI (US)
24AQI (US)
24AQI (US)
26AQI (US)
24AQI (US)
18AQI (US)
24AQI (US)
26AQI (US)
27AQI (US)
23AQI (US)
24AQI (US)
32AQI (US)
16AQI (US)
12AQI (US)
23AQI (US)
20AQI (US)
25AQI (US)
35AQI (US)
37AQI (US)
35AQI (US)
36AQI (US)
34AQI (US)
37AQI (US)
34AQI (US)
40AQI (US)
57AQI (US)
38AQI (US)
34AQI (US)
38AQI (US)
29AQI (US)
26AQI (US)
24AQI (US)
22AQI (US)
25AQI (US)
22AQI (US)
19AQI (US)
22AQI (US)
20AQI (US)
21AQI (US)
21AQI (US)
20AQI (US)
19AQI (US)
20AQI (US)
20AQI (US)
23AQI (US)
20AQI (US)
25AQI (US)
40AQI (US)
23AQI (US)
21AQI (US)
24AQI (US)
24AQI (US)
22AQI (US)
21AQI (US)
38AQI (US)
54AQI (US)
29AQI (US)
34AQI (US)
24AQI (US)
16AQI (US)
18AQI (US)
21AQI (US)
20AQI (US)
18AQI (US)
20AQI (US)
23AQI (US)
21AQI (US)
14AQI (US)
19AQI (US)
17AQI (US)
23AQI (US)
33AQI (US)
31AQI (US)
30AQI (US)
28AQI (US)
29AQI (US)
30AQI (US)
27AQI (US)
27AQI (US)
34AQI (US)
49AQI (US)
42AQI (US)
28AQI (US)
32AQI (US)
36AQI (US)
45AQI (US)
37AQI (US)
24AQI (US)
26AQI (US)
28AQI (US)
42AQI (US)
26AQI (US)
29AQI (US)
26AQI (US)
22AQI (US)
27AQI (US)
27AQI (US)
29AQI (US)
23AQI (US)
24AQI (US)
22AQI (US)
26AQI (US)
29AQI (US)
26AQI (US)
33AQI (US)
33AQI (US)
39AQI (US)
28AQI (US)
25AQI (US)
30AQI (US)
28AQI (US)
26AQI (US)
22AQI (US)
25AQI (US)
23AQI (US)
21AQI (US)
26AQI (US)
27AQI (US)
30AQI (US)
34AQI (US)
24AQI (US)
22AQI (US)
24AQI (US)
23AQI (US)
25AQI (US)
24AQI (US)
24AQI (US)
14AQI (US)
19AQI (US)
24AQI (US)
25AQI (US)
27AQI (US)
17AQI (US)
21AQI (US)
22AQI (US)
26AQI (US)
23AQI (US)
19AQI (US)
25AQI (US)
31AQI (US)
23AQI (US)
24AQI (US)
26AQI (US)
24AQI (US)
27AQI (US)
26AQI (US)
26AQI (US)
31AQI (US)
29AQI (US)
40AQI (US)
26AQI (US)
30AQI (US)
25AQI (US)
37AQI (US)
35AQI (US)
30AQI (US)
42AQI (US)
26AQI (US)
29AQI (US)
24AQI (US)
29AQI (US)
27AQI (US)
25AQI (US)
No. of days
202630AQI (US)
Highest AQI (US) recorded in
March42AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202537AQI (US)
Highest AQI (US) recorded in
February51AQI (US)
Lowest AQI (US) recorded in
September25AQI (US)
202434AQI (US)
Highest AQI (US) recorded in
January47AQI (US)
Lowest AQI (US) recorded in
July23AQI (US)
202338AQI (US)
Highest AQI (US) recorded in
February56AQI (US)
Lowest AQI (US) recorded in
August25AQI (US)
202239AQI (US)
Highest AQI (US) recorded in
March57AQI (US)
Lowest AQI (US) recorded in
September25AQI (US)
202138AQI (US)
Highest AQI (US) recorded in
January49AQI (US)
Lowest AQI (US) recorded in
August25AQI (US)
202032AQI (US)
Highest AQI (US) recorded in
March62AQI (US)
Lowest AQI (US) recorded in
July21AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Rennes's annual 2026 AQI (US) (30) shows an average percentage change of -17.01% (improved AQI (US)) compared to previous years: 2020 (32), 2021 (38), 2022 (39), 2023 (38), 2024 (34), 2025 (37).