Air Quality in St. Johns, United States

Drizzle
29.9°C · 59.9% humidity
29.9°
Feels 34.1°
18
Good
Air quality is satisfactory. Enjoy outdoor activities.
4 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
20 7pm
20
27
18 10pm
21
22
24 1am
25
25
26 4am
26
26
47 7am
47
20
20 10am
18
20
20 1pm
20
20
27 4pm
27
27
Station readings 28h ago
AQI 20
PM2.5 4.9 µg/m³ · 28h ago
AD 728×90

Air Quality Index Trend

46h · 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.

59.9%
Humidity
54.3 km/h
Wind W
1008.7 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
18
4.19 µg/m³
PM10▲
19
20.55 µg/m³
050100150200300500

What is the weather forecast for St. Johns?

Temperature & Precipitation

PM2.5 Trend

46h · 6 stations
PM2.54.19 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (4 stations within 25 km)
4.19
Median
4.27
Average
3.1
Low
5.3
High
PM2.5 µg/m³ · Model: 7.0 · Bias: +2.8

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
10.3 km PM2.5: 2.6 µg/m³
34
Mandarin Rd Site, Duval, Florida, USA
10.3 km PM2.5: 8.2 µg/m³
61
Pepsi Place (PP-PPL), Duval, Florida, USA
20.9 km PM2.5: 16.9 µg/m³
20
Mayo Clinic, Duval, Florida, USA
21.8 km PM2.5: 4.8 µg/m³
53
Mayo Clinic, Duval, Florida, USA
21.8 km PM2.5: 13.1 µg/m³

What cities are near St. Johns?

17 Fruit Cove 17 Fleming Island 20 Palm Valley 17 Lakeside 21 Ponte Vedra Beach 20 Jacksonville Beach 17 Oakleaf Plantation 15 Jacksonville 28 Palm Coast 34 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 2026-06-09T02:16 UTC.