Altstadt, Erfurt, Thuringen, Germany 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
Altstadt, Erfurt, Thuringen, Germany
AQI Trends: Highest and Lowest
Same Day Analysis (4th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 53 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Oct - 5th Oct 2025
Altstadt, Erfurt, Thuringen, Germany
6 AM4th Oct 2025
7 PM
5 AM5th Oct 2025
52AQI
18AQI
54AQI
12AQI
In the last 24 hours,
Altstadt's AQI reached its highest point of 54 at 6 AM during the Night, while the lowest point, 12, was recorded at 5 AM during the Night between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Altstadt, Erfurt, Thuringen, Germany
18°C14/22°C
17°C11/22°C
17°C13/23°C
18°C12/24°C
17°C12/23°C
16°C12/20°C
16°C11/20°C
16°C12/20°C
16°C11/22°C
15°C12/20°C
18°C15/22°C
15°C13/18°C
14°C11/19°C
19°C15/24°C
20°C14/28°C
22°C14/30°C
18°C12/24°C
12°C11/14°C
12°C6/16°C
11°C6/16°C
7°C6/7°C
10°C7/11°C
12°C10/14°C
15°C11/19°C
12°C9/17°C
11°C6/15°C
8°C3/13°C
9°C4/15°C
9°C4/15°C
10°C9/14°C
--°C/°C
31AQI
27AQI
30AQI
27AQI
2025 Days Vs Air Quality
Altstadt, Erfurt, Thuringen, Germany
95%
123
5%
6
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 278 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
Altstadt, Erfurt, Thuringen, Germany
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
16AQI
18AQI
25AQI
23AQI
36AQI
47AQI
33AQI
19AQI
16AQI
17AQI
20AQI
19AQI
38AQI
39AQI
38AQI
42AQI
37AQI
43AQI
38AQI
33AQI
38AQI
38AQI
33AQI
31AQI
29AQI
32AQI
28AQI
26AQI
25AQI
22AQI
27AQI
25AQI
23AQI
24AQI
27AQI
31AQI
27AQI
25AQI
24AQI
21AQI
20AQI
22AQI
23AQI
23AQI
22AQI
25AQI
27AQI
28AQI
27AQI
25AQI
27AQI
29AQI
32AQI
27AQI
22AQI
20AQI
20AQI
24AQI
26AQI
30AQI
28AQI
24AQI
23AQI
23AQI
24AQI
23AQI
22AQI
23AQI
24AQI
24AQI
25AQI
29AQI
37AQI
44AQI
42AQI
43AQI
49AQI
57AQI
61AQI
58AQI
47AQI
32AQI
29AQI
34AQI
34AQI
26AQI
23AQI
21AQI
21AQI
25AQI
34AQI
42AQI
35AQI
29AQI
24AQI
21AQI
20AQI
19AQI
16AQI
21AQI
21AQI
22AQI
24AQI
35AQI
41AQI
29AQI
22AQI
19AQI
19AQI
16AQI
18AQI
18AQI
18AQI
21AQI
30AQI
32AQI
25AQI
21AQI
19AQI
17AQI
30AQI
32AQI
39AQI
49AQI
44AQI
43AQI
62AQI
63AQI
53AQI
20AQI
31AQI
25AQI
34AQI
25AQI
55AQI
No. of days
202529AQI
Highest AQI recorded in
October55AQI
Lowest AQI recorded in
May20AQI
Most & Least Polluted Years Over the Last 1 Years
Altstadt's annual 2025 AQI (29) shows an average percentage change of NaN% (improved AQI) compared to previous years: .