Air Quality in Monrovia, United States

Windy
30.1°C · 16.7% humidity
30.1°
Feels 30.1°
21
Good
Air quality is satisfactory. Enjoy outdoor activities.
4 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
12 2pm
12
12
21 5pm
6
5
15 8pm
14
14
13 11pm
13
13
12 2am
12
12
12 5am
12
12
12 8am
12
12
12 11am
12
12
Station readings
17
8
4
4
CAMS model adj -42
54
54
54
54
34
34
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
AD 728×90

Air Quality Index Trend

38h · 1 stn

Monrovia's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Monrovia is 1.0× the WHO annual guideline of 5 µg/m³.

16.7%
Humidity
47.4 km/h
Wind SSW
1011.5 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
21
5.07 µg/m³
PM10▲
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Monrovia?

Temperature & Precipitation

PM2.5 Trend

38h · 1 station
PM2.55.07 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (4 stations within 25 km)
5.07
Median
7.43
Average
0.27
Low
15.0
High
PM2.5 µg/m³ · Model: 13.5 · Bias: +8.4

What is the 7-day forecast for Monrovia?

05-29
30.1° 14.6°
05-30
19.6° 8.8°
05-31
27.6° 16.6°
06-01
29.9° 11.8°
06-02
28.3° 10.6°
06-03
27.2° 7.2°
06-04
24.2° 12.2°
Both models agree Avg diff: 3.8°C

Where are air quality stations near Monrovia?

4
united-states-of-america-san-marino-sierra-madre-boulevard
9.5 km 25.8°C 33.0% RH PM2.5: 1.0 µg/m³ PM10: 1.0 µg/m³
31
Glendora-Laurel, Los Angeles
13.7 km PM2.5: 7.4 µg/m³
38
Glendora-Laurel, Los Angeles
13.7 km PM2.5: 9.1 µg/m³
10
Glendora-Laurel, Los Angeles
13.7 km PM2.5: 2.4 µg/m³
43
Glendora-Laurel, Los Angeles
13.7 km PM2.5: 10.3 µg/m³
48
Glendora-Laurel, Los Angeles
13.7 km PM2.5: 11.5 µg/m³
1
RBAC Rose Bowl Aquatics Center
15.2 km PM2.5: 0.2 µg/m³ PM10: 0.2 µg/m³
19
Loyola Village ES (5014)
15.5 km PM2.5: 4.6 µg/m³
24
Sierra Vista ES (6767)
15.8 km PM2.5: 5.7 µg/m³
23
San Pascual ES (6493)
16.3 km PM2.5: 5.5 µg/m³

What cities are near Monrovia?

28 Duarte 13 Arcadia 11 Temple City 32 Baldwin Park 48 Azusa 40 Vincent 20 El Monte 15 Rosemead 33 West Covina 30 West Puente Valley
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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 2026-05-29T00:19 UTC.