Newcastle, Wyoming, 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
Newcastle, Wyoming, United States
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: 5th Oct - 6th Oct 2025
Newcastle, Wyoming, United States
6 AM5th Oct 2025
6 PM
5 AM6th Oct 2025
AQI
AQI
70AQI
25AQI
In the last 24 hours,
Newcastle's AQI reached its highest point of 70 at 2 AM during the Night, while the lowest point, 25, was recorded at 9 PM during the Night between 5th Oct and 6th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Newcastle, Wyoming, United States
14°C5/25°C
18°C9/30°C
22°C14/30°C
22°C14/30°C
22°C14/31°C
23°C16/33°C
22°C15/30°C
21°C15/28°C
19°C13/25°C
20°C11/29°C
16°C10/22°C
15°C12/20°C
15°C9/22°C
14°C10/20°C
17°C10/24°C
20°C10/29°C
16°C11/22°C
16°C10/25°C
16°C7/26°C
18°C7/29°C
19°C11/29°C
17°C6/28°C
22°C15/30°C
20°C11/28°C
20°C13/29°C
19°C13/27°C
18°C8/29°C
21°C12/33°C
16°C11/23°C
--°C/°C
--°C/°C
31AQI
27AQI
31AQI
28AQI
2025 Days Vs Air Quality
Newcastle, Wyoming, United States
95%
182
5%
10
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
Newcastle, Wyoming, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
33AQI
45AQI
33AQI
28AQI
31AQI
29AQI
32AQI
36AQI
29AQI
29AQI
33AQI
35AQI
31AQI
39AQI
43AQI
44AQI
37AQI
36AQI
28AQI
32AQI
37AQI
28AQI
21AQI
19AQI
31AQI
27AQI
28AQI
29AQI
34AQI
26AQI
27AQI
35AQI
33AQI
27AQI
29AQI
27AQI
28AQI
30AQI
28AQI
28AQI
25AQI
27AQI
31AQI
31AQI
32AQI
29AQI
31AQI
32AQI
31AQI
25AQI
30AQI
26AQI
26AQI
23AQI
23AQI
23AQI
24AQI
24AQI
29AQI
19AQI
26AQI
30AQI
28AQI
29AQI
30AQI
41AQI
37AQI
31AQI
25AQI
30AQI
32AQI
22AQI
30AQI
54AQI
54AQI
54AQI
49AQI
49AQI
42AQI
36AQI
34AQI
30AQI
33AQI
29AQI
34AQI
38AQI
46AQI
44AQI
36AQI
34AQI
35AQI
34AQI
36AQI
36AQI
31AQI
30AQI
31AQI
37AQI
36AQI
34AQI
40AQI
30AQI
30AQI
30AQI
34AQI
34AQI
43AQI
35AQI
38AQI
34AQI
34AQI
31AQI
37AQI
44AQI
39AQI
36AQI
34AQI
35AQI
32AQI
30AQI
34AQI
38AQI
33AQI
35AQI
32AQI
37AQI
50AQI
52AQI
45AQI
37AQI
34AQI
37AQI
44AQI
39AQI
42AQI
23AQI
32AQI
33AQI
24AQI
31AQI
35AQI
36AQI
39AQI
38AQI
30AQI
29AQI
35AQI
41AQI
37AQI
32AQI
38AQI
37AQI
37AQI
32AQI
29AQI
39AQI
38AQI
34AQI
37AQI
42AQI
59AQI
72AQI
63AQI
54AQI
50AQI
44AQI
49AQI
41AQI
26AQI
24AQI
19AQI
19AQI
20AQI
18AQI
20AQI
25AQI
27AQI
27AQI
23AQI
23AQI
32AQI
33AQI
37AQI
42AQI
54AQI
31AQI
31AQI
21AQI
30AQI
35AQI
35AQI
53AQI
34AQI
31AQI
28AQI
37AQI
35AQI
36AQI
35AQI
38AQI
No. of days
202534AQI
Highest AQI recorded in
October38AQI
Lowest AQI recorded in
May28AQI
Most & Least Polluted Years Over the Last 1 Years
Newcastle's annual 2025 AQI (34) shows an average percentage change of NaN% (improved AQI) compared to previous years: .