TODAY OCT16
TEMPERATURE39
HUMIDITY24
PRESSURE
WIND COND.97 1
  • 6519Wed
  • 6921Thu
  • 7025Fri
  • 7125Sat
  • 6927Sun
daynightWeather update from DENTEN CREEK at
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Portola Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January15°F41°F26°F13.4"
February19°F45°F30°F13.5"
March22°F49°F35°F8.0"
April26°F55°F39°F5.9"
May30°F64°F47°F4.9"
June36°F74°F56°F3.2"
July41°F82°F63°F6.3"
August39°F81°F61°F3.8"
September34°F75°F55°F3.6"
October27°F63°F43°F11.2"
November22°F51°F35°F6.3"
December16°F41°F27°F10.8"

Did you know?

  • The highest monthly average temperature in Portola for July is 63 degrees.
  • The lowest monthly average temperature in Portola for January is 26 degrees.
  • The most monthly precipitation in Portola occurs in February with 13.5 inches.
  • The air quality index in Portola is 11% better than the national average.
  • The pollution index in Portola is 426% worse than the national average.

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Portola air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexPortolaCaliforniaNational
Air quality index445550
Pollution index26,667,30018,106,7265,066,862

Portola air quality information

MeasurementTotal
Days measured363
Days with good air quality238
Days with moderate air quality120
Days w/ poor A.Q. for sensitive groups5
Days with unhealthy air quality

Portola air quality information

PollutantTotal
Arsenic0.360%
Benzene0.250%
Carbon Tetrachloride0.100%
Lead0.250%
Mercury0.260%

Average monthly Portola temperature with heat index

Portola monthly precipitation with daily maximum

Portola monthly snow depth with daily maximum

Portola monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
C-Road, CA1164412%
Graeagle, CA6364412%
Loyalton, CA9164412%
Sattley, CA604412%
Blairsden, CA514412%
Portola, CA2,0824412%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Arlington, MN2,0824412%
Andrews, NC2,082394%
Marceline, MO2,083375650%
Labadieville, LA2,0833432%
Willow, AK2,0812942%
Portola, CA2,0824412%
Source: The Portola, CA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.