Air Quality in St. Johns, United States
Windy
36.6°C · 34.8% humidity
36.6°
Feels 36.6°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
3 stations
Nearby Monitoring Stations
St. Johns's air quality — share it
AQI Forecast
Calibrated
29
7pm
23
26
28
10pm
27
27
27
1am
27
27
29
4am
29
29
29
7am
29
27
27
10am
27
27
27
1pm
27
27
27
4pm
27
27
Station readings
29
23
26
25
CAMS model
adj +2
24
24
24
24
25
25
25
25
25
27
27
27
27
27
25
25
25
25
25
25
25
25
25
25
Air Quality Index Trend
39h · 3 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.
34.8%
Humidity
45.2 km/h
Wind SW
1014.2 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
6.67 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for St. Johns?
Temperature & Precipitation
PM2.5 Trend
39h · 3 stationsPM2.56.67 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX2.2
Moderate
Station readings (3 stations within 25 km)
6.67
Median
7.73
Average
5.3
Low
12.1
High
PM2.5 µg/m³ · Model: 5.9 · Bias: -0.8
What is the 7-day forecast for St. Johns?
08-03
36.6° 23.7°
5.19 mm
08-04
32.4° 23.9°
14.0 mm
08-05
36.1° 24.8°
08-06
36.3° 23.4°
0.06 mm
08-07
32.3° 24.1°
4.94 mm
08-08
34.2° 24.9°
0.75 mm
08-09
36.5° 24.6°
0.25 mm
Both models agree
Avg diff: 1.5°C
Where are air quality stations near St. Johns?
23
Mandarin Rd Site, Duval, Florida, USA
22
Pepsi Place (PP-PPL), Duval, Florida, USA
40
Mayo Clinic, Duval, Florida, USA
35
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 2026-08-08T02:57 UTC.