Air Quality in St. Johns, United States

Drizzle
22.6°C · 93.3% humidity
22.6°
Feels 22.6°
16
Good
Air quality is satisfactory. Enjoy outdoor activities.
5 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
27 10pm
27
27
16 1am
19
21
23 4am
24
25
46 7am
46
19
19 10am
18
20
20 1pm
20
20
27 4pm
27
27
27 7pm
27
20
Station readings 31h ago
AQI 20
PM2.5 4.9 µg/m³ · 31h ago
AD 728×90

Air Quality Index Trend

48h · 6 stn

St. 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▲
16
3.81 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for St. Johns?

Temperature & Precipitation

PM2.5 Trend

48h · 6 stations
PM2.53.81 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (5 stations within 25 km)
3.81
Median
3.98
Average
3.1
Low
6.5
High
PM2.5 µg/m³ · Model: 7.1 · Bias: +3.3

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?

21
Mandarin Rd Site, Duval, Florida, USA
10.3 km PM2.5: 5.0 µg/m³
34
Mandarin Rd Site, Duval, Florida, USA
10.3 km PM2.5: 8.2 µg/m³
42
Pepsi Place (PP-PPL), Duval, Florida, USA
20.9 km PM2.5: 10.1 µg/m³
31
Mayo Clinic, Duval, Florida, USA
21.8 km PM2.5: 7.4 µg/m³
38
Mayo Clinic, Duval, Florida, USA
21.8 km PM2.5: 9.1 µg/m³

What cities are near St. Johns?

15 Fruit Cove 15 Fleming Island 21 Palm Valley 14 Lakeside 24 Ponte Vedra Beach 23 Jacksonville Beach 14 Oakleaf Plantation 20 Jacksonville 35 Palm Coast 38 St. Marys
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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 2026-06-09T05:23 UTC.