The Big, La Grande, Oregon, 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
The Big, La Grande, Oregon, United States
AQI Trends: Highest and Lowest
Same Day Analysis (14th October ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 3rd highest AQI at 25 of Good air quality, showing improvement over 2024 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 14th Oct - 15th Oct 2025
The Big, La Grande, Oregon, United States
6 AM14th Oct 2025
6 PM
5 AM15th Oct 2025
64AQI
11AQI
71AQI
12AQI
In the last 24 hours,
The Big's AQI reached its highest point of 71 at 10 PM during the Night, while the lowest point, 11, was recorded at 8 AM during the Day between 14th Oct and 15th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
The Big, La Grande, Oregon, United States
14°C8/21°C
16°C7/26°C
18°C8/28°C
20°C10/30°C
20°C12/30°C
21°C13/30°C
17°C6/24°C
13°C6/22°C
15°C3/27°C
18°C5/29°C
17°C6/29°C
15°C7/23°C
15°C3/27°C
18°C6/30°C
20°C13/27°C
16°C11/22°C
15°C11/20°C
13°C9/20°C
13°C9/18°C
11°C7/15°C
10°C2/17°C
9°C-2/18°C
11°C-1/21°C
15°C6/24°C
17°C8/26°C
15°C5/26°C
9°C7/12°C
8°C5/10°C
8°C4/13°C
9°C6/13°C
--°C/°C
33AQI
27AQI
33AQI
28AQI
2025 Days Vs Air Quality
The Big, La Grande, Oregon, United States
94%
270
6%
17
Total number of days with different AQI categories in last 288 days in 2025 (77 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2025, 94% of 288 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
The Big, La Grande, Oregon, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
25AQI
27AQI
29AQI
27AQI
28AQI
28AQI
29AQI
30AQI
30AQI
28AQI
25AQI
25AQI
28AQI
29AQI
31AQI
29AQI
28AQI
30AQI
27AQI
26AQI
29AQI
31AQI
32AQI
33AQI
31AQI
32AQI
33AQI
37AQI
40AQI
41AQI
35AQI
30AQI
30AQI
30AQI
30AQI
25AQI
29AQI
27AQI
29AQI
31AQI
31AQI
29AQI
33AQI
29AQI
30AQI
28AQI
29AQI
35AQI
36AQI
33AQI
33AQI
30AQI
33AQI
30AQI
32AQI
29AQI
30AQI
28AQI
27AQI
28AQI
26AQI
23AQI
26AQI
23AQI
24AQI
23AQI
24AQI
26AQI
22AQI
23AQI
22AQI
19AQI
20AQI
18AQI
17AQI
18AQI
17AQI
19AQI
17AQI
20AQI
17AQI
20AQI
18AQI
22AQI
20AQI
20AQI
21AQI
20AQI
24AQI
21AQI
24AQI
22AQI
23AQI
23AQI
25AQI
25AQI
22AQI
22AQI
22AQI
24AQI
22AQI
22AQI
23AQI
23AQI
23AQI
24AQI
22AQI
25AQI
23AQI
23AQI
18AQI
19AQI
19AQI
27AQI
28AQI
26AQI
28AQI
23AQI
21AQI
20AQI
21AQI
23AQI
20AQI
18AQI
20AQI
18AQI
19AQI
17AQI
20AQI
21AQI
18AQI
18AQI
16AQI
16AQI
19AQI
17AQI
19AQI
16AQI
19AQI
15AQI
16AQI
17AQI
19AQI
22AQI
22AQI
21AQI
20AQI
22AQI
20AQI
20AQI
21AQI
20AQI
19AQI
19AQI
19AQI
19AQI
22AQI
21AQI
23AQI
25AQI
29AQI
32AQI
36AQI
36AQI
27AQI
25AQI
25AQI
27AQI
25AQI
21AQI
22AQI
21AQI
21AQI
24AQI
32AQI
32AQI
26AQI
22AQI
19AQI
19AQI
20AQI
25AQI
27AQI
26AQI
24AQI
37AQI
27AQI
23AQI
26AQI
25AQI
25AQI
25AQI
29AQI
31AQI
26AQI
21AQI
25AQI
35AQI
35AQI
38AQI
36AQI
30AQI
31AQI
29AQI
33AQI
24AQI
21AQI
22AQI
20AQI
22AQI
26AQI
30AQI
35AQI
47AQI
38AQI
25AQI
25AQI
32AQI
19AQI
16AQI
18AQI
21AQI
24AQI
37AQI
31AQI
28AQI
33AQI
24AQI
17AQI
22AQI
25AQI
26AQI
24AQI
34AQI
53AQI
65AQI
60AQI
60AQI
57AQI
62AQI
58AQI
60AQI
56AQI
56AQI
56AQI
56AQI
61AQI
79AQI
66AQI
55AQI
53AQI
43AQI
50AQI
46AQI
39AQI
44AQI
27AQI
20AQI
24AQI
27AQI
28AQI
32AQI
44AQI
31AQI
22AQI
44AQI
35AQI
31AQI
35AQI
27AQI
36AQI
43AQI
35AQI
18AQI
16AQI
19AQI
21AQI
32AQI
23AQI
26AQI
31AQI
39AQI
38AQI
36AQI
23AQI
29AQI
25AQI
30AQI
30AQI
21AQI
23AQI
19AQI
24AQI
28AQI
37AQI
42AQI
27AQI
No. of days
202528AQI
Highest AQI recorded in
September42AQI
Lowest AQI recorded in
May19AQI
202431AQI
Highest AQI recorded in
July46AQI
Lowest AQI recorded in
April4AQI
202323AQI
Highest AQI recorded in
November36AQI
Lowest AQI recorded in
April18AQI
202227AQI
Highest AQI recorded in
September45AQI
Lowest AQI recorded in
May14AQI
202124AQI
Highest AQI recorded in
August55AQI
Lowest AQI recorded in
April2AQI
202031AQI
Highest AQI recorded in
September84AQI
Lowest AQI recorded in
June14AQI
Most & Least Polluted Years Over the Last 6 Years
The Big's annual 2025 AQI (28) shows an average percentage change of 4.2% (worsened AQI) compared to previous years: 2020 (31), 2021 (24), 2022 (27), 2023 (23), 2024 (31).