Air Quality in St. Johns, United States

Drizzle
22.6°C · 93.3% humidity
22.6°
Feels 22.6°
19
Good
Air quality is satisfactory. Enjoy outdoor activities.
4 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
27 11pm
27
27
19 2am
21
23
24 5am
25
45
46 8am
19
19
18 11am
20
20
20 2pm
20
27
27 5pm
27
27
27 8pm
20
20
Station readings 32h ago
AQI 20
PM2.5 4.9 µg/m³ · 32h 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▲
19
4.62 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for St. Johns?

Temperature & Precipitation

PM2.5 Trend

48h · 6 stations
PM2.54.62 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (4 stations within 25 km)
4.62
Median
5.28
Average
3.1
Low
8.9
High
PM2.5 µg/m³ · Model: 7.1 · Bias: +2.5

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?

23
Mandarin Rd Site, Duval, Florida, USA
10.3 km PM2.5: 5.5 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
38
Mayo Clinic, Duval, Florida, USA
21.8 km PM2.5: 9.1 µg/m³
31
Mayo Clinic, Duval, Florida, USA
21.8 km PM2.5: 7.4 µg/m³

What cities are near St. Johns?

16 Fruit Cove 18 Fleming Island 22 Palm Valley 20 Lakeside 23 Ponte Vedra Beach 22 Jacksonville Beach 21 Oakleaf Plantation 18 Jacksonville 35 Palm Coast 32 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 2026-06-09T06:36 UTC.