Boise, Idaho, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
June Air Quality Analysis
Boise, Idaho, United States
AQI Trends: Highest and Lowest
Same Day Analysis (2nd June):
On this day, AQI across the 4 years varied significantly: 2026 ranks 3rd highest AQI at 26 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: 1st Jun - 2nd Jun 2026
Boise, Idaho, United States
6 AM1st Jun 2026
9 PM
5 AM2nd Jun 2026
28AQI
9AQI
36AQI
10AQI
In the last 24 hours,
Boise's AQI reached its highest point of 36 at 4 AM during the Night, while the lowest point, 9, was recorded at 9 PM during the Day between 1st Jun and 2nd Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Boise, Idaho, United States
19°C8/27°C
19°C12/27°C
18°C9/27°C
20°C11/27°C
19°C9/27°C
18°C8/26°C
22°C12/32°C
21°C13/29°C
25°C12/36°C
23°C14/26°C
16°C7/24°C
16°C8/22°C
12°C9/18°C
10°C4/16°C
13°C5/20°C
14°C6/21°C
14°C8/21°C
18°C9/26°C
19°C10/27°C
22°C12/30°C
23°C14/30°C
26°C15/34°C
19°C14/25°C
20°C10/30°C
22°C15/32°C
19°C10/27°C
18°C12/25°C
16°C9/24°C
19°C8/27°C
21°C9/30°C
38AQI
24AQI
28AQI
21AQI
2026 Days Vs Air Quality
Boise, Idaho, United States
99%
148
1%
2
Total number of days with different AQI categories in last 153 days in 2026 (212 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2026, 99% of 153 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
Boise, Idaho, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
58AQI (US)
46AQI (US)
27AQI (US)
26AQI (US)
20AQI (US)
30AQI (US)
26AQI (US)
31AQI (US)
54AQI (US)
35AQI (US)
36AQI (US)
42AQI (US)
44AQI (US)
42AQI (US)
38AQI (US)
39AQI (US)
34AQI (US)
32AQI (US)
29AQI (US)
23AQI (US)
31AQI (US)
35AQI (US)
42AQI (US)
38AQI (US)
28AQI (US)
29AQI (US)
38AQI (US)
30AQI (US)
40AQI (US)
48AQI (US)
39AQI (US)
32AQI (US)
37AQI (US)
40AQI (US)
34AQI (US)
40AQI (US)
43AQI (US)
42AQI (US)
43AQI (US)
38AQI (US)
31AQI (US)
28AQI (US)
33AQI (US)
26AQI (US)
39AQI (US)
25AQI (US)
34AQI (US)
34AQI (US)
37AQI (US)
25AQI (US)
32AQI (US)
27AQI (US)
34AQI (US)
32AQI (US)
28AQI (US)
34AQI (US)
25AQI (US)
25AQI (US)
24AQI (US)
37AQI (US)
47AQI (US)
25AQI (US)
36AQI (US)
40AQI (US)
32AQI (US)
32AQI (US)
30AQI (US)
23AQI (US)
24AQI (US)
27AQI (US)
27AQI (US)
37AQI (US)
42AQI (US)
35AQI (US)
27AQI (US)
38AQI (US)
34AQI (US)
27AQI (US)
28AQI (US)
29AQI (US)
28AQI (US)
30AQI (US)
39AQI (US)
29AQI (US)
22AQI (US)
21AQI (US)
28AQI (US)
24AQI (US)
25AQI (US)
21AQI (US)
29AQI (US)
33AQI (US)
28AQI (US)
22AQI (US)
25AQI (US)
26AQI (US)
24AQI (US)
23AQI (US)
28AQI (US)
29AQI (US)
29AQI (US)
28AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
31AQI (US)
28AQI (US)
23AQI (US)
20AQI (US)
44AQI (US)
26AQI (US)
27AQI (US)
27AQI (US)
28AQI (US)
20AQI (US)
17AQI (US)
22AQI (US)
23AQI (US)
23AQI (US)
24AQI (US)
21AQI (US)
27AQI (US)
28AQI (US)
27AQI (US)
27AQI (US)
27AQI (US)
26AQI (US)
37AQI (US)
35AQI (US)
45AQI (US)
16AQI (US)
22AQI (US)
26AQI (US)
35AQI (US)
29AQI (US)
26AQI (US)
28AQI (US)
22AQI (US)
24AQI (US)
28AQI (US)
31AQI (US)
33AQI (US)
44AQI (US)
21AQI (US)
30AQI (US)
20AQI (US)
16AQI (US)
13AQI (US)
18AQI (US)
26AQI (US)
36AQI (US)
33AQI (US)
30AQI (US)
27AQI (US)
27AQI (US)
22AQI (US)
No. of days
202631AQI (US)
Highest AQI (US) recorded in
January36AQI (US)
Lowest AQI (US) recorded in
June22AQI (US)
202543AQI (US)
Highest AQI (US) recorded in
January57AQI (US)
Lowest AQI (US) recorded in
May32AQI (US)
202445AQI (US)
Highest AQI (US) recorded in
December58AQI (US)
Lowest AQI (US) recorded in
January18AQI (US)
202318AQI (US)
Highest AQI (US) recorded in
November22AQI (US)
Lowest AQI (US) recorded in
December17AQI (US)
202240AQI (US)
Highest AQI (US) recorded in
September64AQI (US)
Lowest AQI (US) recorded in
June27AQI (US)
202142AQI (US)
Highest AQI (US) recorded in
August64AQI (US)
Lowest AQI (US) recorded in
April25AQI (US)
202040AQI (US)
Highest AQI (US) recorded in
September71AQI (US)
Lowest AQI (US) recorded in
June23AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Boise's annual 2026 AQI (US) (31) shows an average percentage change of -9.6% (improved AQI (US)) compared to previous years: 2020 (40), 2021 (42), 2022 (40), 2023 (18), 2024 (45), 2025 (43).