Air quality in Winchester
The US Air Quality Index (EPA) grades air from 0 to 500 using fine particles (PM2.5/PM10), ozone and nitrogen dioxide. 0-50 is Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, and anything higher affects everyone.
PM2.5
3.8 µg/m³
WHO guideline 15
PM10
3.9 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
12:00 PM
💨
PM2.5 3.8 µg/m³
43Good
1:00 PM
💨
PM2.5 2.9 µg/m³
48Good
2:00 PM
💨
PM2.5 2.7 µg/m³
55Moderate
3:00 PM
💨
PM2.5 2.9 µg/m³
65Moderate
4:00 PM
💨
PM2.5 2.8 µg/m³
71Moderate
5:00 PM
💨
PM2.5 2.9 µg/m³
71Moderate
6:00 PM
💨
PM2.5 2.9 µg/m³
58Moderate
7:00 PM
💨
PM2.5 3 µg/m³
47Good
8:00 PM
💨
PM2.5 3.5 µg/m³
42Good
9:00 PM
💨
PM2.5 4.2 µg/m³
38Good
10:00 PM
💨
PM2.5 4.6 µg/m³
34Good
11:00 PM
💨
PM2.5 4.9 µg/m³
31Good
Next few days
daily max · US EPA AQI
Thu
💨
Moderate · UV Very high
71
Fri
💨
Moderate · UV High
51
Sat
💨
Moderate · UV High
70
Sun
💨
Good · UV Very high
48