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Menlo Park (California) (US)

Air Quality Trend (last 7 days)

Good (0-50)
Moderate (51-100)
Unhealthy for Sensitive Groups (101-150)
Unhealthy (151-200)
Very Unhealthy (201-300)
Hazardous (300+)

Weather - 48h MET Norway

Clear sky
14°C
Clear sky
Humidity
74.1%
Wind
2 m/s
Pressure
1024.4 hPa
Direction
352°
Sunrise
05:00
Sunset
17:00
24h Forecast:
Temp.
8° / 16°
Precip.
0mm
Max wind
2.4 m/s

Hourly Forecast

04.02
Now
Weather
14°
04.02
04:00
Weather
13°
04.02
05:00
Weather
11°
04.02
06:00
Weather
11°
04.02
07:00
Weather
10°
04.02
08:00
Weather
10°
04.02
09:00
Weather
10°
04.02
10:00
Weather
10°
04.02
11:00
Weather
04.02
12:00
Weather
04.02
13:00
Weather
04.02
14:00
Weather
04.02
15:00
Weather
04.02
16:00
Weather
04.02
17:00
Weather
11°
04.02
18:00
Weather
12°
04.02
19:00
Weather
13°
04.02
20:00
Weather
14°
04.02
21:00
Weather
15°
04.02
22:00
Weather
16°
04.02
23:00
Weather
16°
05.02
00:00
Weather
16°
05.02
01:00
Weather
15°
05.02
02:00
Weather
14°

Temperature

16°C
8°C
03:00
14°C
04:00
13°C
05:00
11°C
06:00
11°C
07:00
10°C
08:00
10°C
09:00
10°C
10:00
10°C
11:00
9°C
12:00
9°C
13:00
9°C
14:00
9°C
15:00
8°C
16:00
9°C
17:00
11°C
18:00
12°C
19:00
13°C
20:00
14°C
21:00
15°C
22:00
16°C
23:00
16°C
00:00
16°C
01:00
15°C
02:00
14°C
03:00 14:00 02:00

Precipitation

0mm
0mm
03:00 14:00 02:00

Wind

2.4m/s
0m/s
03:00
2 m/s
04:00
1.9 m/s
05:00
2.1 m/s
06:00
2.2 m/s
07:00
1.7 m/s
08:00
1.5 m/s
09:00
1.2 m/s
10:00
1.2 m/s
11:00
1.6 m/s
12:00
1.3 m/s
13:00
1.5 m/s
14:00
1.6 m/s
15:00
1.4 m/s
16:00
1.7 m/s
17:00
2 m/s
18:00
1.6 m/s
19:00
1.6 m/s
20:00
1.6 m/s
21:00
2.4 m/s
22:00
2.4 m/s
23:00
1.9 m/s
00:00
1.4 m/s
01:00
1.3 m/s
02:00
2 m/s
03:00 14:00 02:00

Radiation

No sensor within 100 km.

We display the worst measurements from all stations in the area. This approach provides a more cautious assessment of air quality, accounting for local pollution sources.

AQI
28.3 km
112
37.3%

Measurement time: 2026-02-04 01:33

Calculated from PM2.5/PM10

O3
28.3 km
115.13 µg/m3
72%

Measurement time: 2026-02-04 01:33

source: OpenWeatherMap

PM2.5
28.3 km
40.2 µg/m3
47.9%

Measurement time: 2026-02-04 01:33

source: OpenWeatherMap

PM10
28.3 km
49.01 µg/m3
35%

Measurement time: 2026-02-04 01:33

source: OpenWeatherMap

NO2
28.3 km
27.91 µg/m3
14%

Measurement time: 2026-02-04 01:33

source: OpenWeatherMap

CO
28.3 km
0.38602 mg/m3
2.8%

Measurement time: 2026-02-04 01:33

source: OpenWeatherMap

SO2
28.3 km
3.41 µg/m3
1%

Measurement time: 2026-02-04 01:33

source: OpenWeatherMap

Info


Region: California
Latitude: 37.45383
Longitude: -122.18219


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About Air Quality in Menlo Park

Air quality in Menlo Park is monitored in real-time by sensors and measurement stations. On this page you'll find current data on major air pollutants including particulate matter PM2.5 and PM10, nitrogen dioxide (NO2), ozone (O3), and radiation levels.

Common Pollutants in Menlo Park

  • PM2.5 - fine particulate matter up to 2.5 micrometers, particularly harmful to health
  • PM10 - particulate matter up to 10 micrometers from traffic and industry
  • NO2 - nitrogen dioxide mainly emitted by vehicles
  • O3 - tropospheric ozone formed in photochemical reactions

When is Air Quality Best in Menlo Park?

Generally, the best air quality occurs:

  • Early morning (5:00-7:00 AM) before rush hour traffic
  • After rainfall which cleanses the atmosphere
  • During strong winds that disperse pollutants
  • In summer months when heating systems are less used

Tips for Runners in Menlo Park

If you're planning outdoor activities in Menlo Park, always check the current AQI value. When AQI exceeds 100, consider moving your workout indoors or shortening the distance. People with respiratory issues, children, and seniors should be especially cautious during elevated pollution levels. Choose routes away from busy streets and industrial areas.