Air Quality in St. Johns, United States
Drizzle
22.6°C · 93.3% humidity
22.6°
Feels 22.6°
21
Good
Air quality is satisfactory. Enjoy outdoor activities.
6 stations
Nearby Monitoring Stations
AQI Forecast
Calibrated
27
9pm
27
27
21
12am
23
24
25
3am
25
26
26
6am
46
47
20
9am
20
18
20
12pm
20
20
20
3pm
27
27
27
6pm
27
27
Station readings
30h ago
AQI 20
PM2.5 4.9 µg/m³ · 30h ago
Air Quality Index Trend
48h · 6 stnSt. Johns's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
93.3%
Humidity
23.6 km/h
Wind W
1011.5 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
5.14 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for St. Johns?
Temperature & Precipitation
PM2.5 Trend
48h · 6 stationsPM2.55.14 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (6 stations within 25 km)
5.14
Median
5.27
Average
3.1
Low
7.2
High
PM2.5 µg/m³ · Model: 7.1 · Bias: +2.0
What is the 7-day forecast for St. Johns?
06-09
31.5° 22.6°
3.13 mm
06-10
37.9° 23.3°
0.06 mm
06-11
27.3° 23.1°
8.94 mm
06-12
32.4° 23.9°
06-13
35.3° 23.8°
0.69 mm
06-14
36.4° 22.4°
0.56 mm
06-15
37.3° 21.8°
5.5 mm
Both models agree
Avg diff: 2.4°C
Where are air quality stations near St. Johns?
11
Mandarin Rd Site, Duval, Florida, USA
112
Mandarin Rd Site, Duval, Florida, USA
61
Pepsi Place (PP-PPL), Duval, Florida, USA
30
Mayo Clinic, Duval, Florida, USA
34
Mayo Clinic, Duval, Florida, USA
What cities are near St. Johns?
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-09T04:59 UTC.