TODAY OCT18
TEMPERATURE48
HUMIDITY96
PRESSURE30.1
WIND COND.
  • 8347Fri
  • 8447Sat
  • 8149Sun
  • 7748Mon
  • 7351Tue
daynightWeather update from Sacramento Executive Airport at
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Thornton 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
January38°F58°F47°F3.3"
February41°F63°F51°F3.1"
March44°F68°F55°F2.9"
April47°F74°F59°F1.8"
May52°F82°F65°F0.5"
June57°F90°F71°F0.3"
July59°F95°F74°F0.0"
August58°F93°F73°F0.0"
September56°F90°F70°F0.1"
October50°F79°F63°F1.2"
November43°F66°F53°F1.6"
December38°F57°F47°F3.8"

Did you know?

  • The highest monthly average temperature in Thornton for July is 74 degrees.
  • The lowest monthly average temperature in Thornton for January is 47 degrees.
  • The most monthly precipitation in Thornton occurs in December with 3.8 inches.
  • The air quality index in Thornton is 14% worse than the national average.
  • The pollution index in Thornton is 205% worse than the national average.

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Thornton 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.
IndexThorntonCaliforniaNational
Air quality index575550
Pollution index15,476,50018,106,7265,066,862

Thornton air quality information

MeasurementTotal
Days measured365
Days with good air quality128
Days with moderate air quality207
Days w/ poor A.Q. for sensitive groups21
Days with unhealthy air quality9

Thornton air quality information

PollutantTotal
Arsenic0.090%
Benzene0.130%
Carbon Tetrachloride0.010%
Lead0.130%
Mercury0.070%

Average monthly Thornton temperature with heat index

Thornton monthly precipitation with daily maximum

Thornton monthly snow depth with daily maximum

Thornton monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Clay, CA1,2095510%
Walnut Grove, CA1,4695510%
Courtland, CA5205510%
Hood, CA3335510%
Clarksburg, CA4755510%
Thornton, CA9685714%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Hankinson, ND9683530%
Peru, NE9683432%
Towaoc, CO9694216%
Piney View, WV969295490%
Mulga, AL96750= 100
Thornton, CA9685714%
Source: The Thornton, 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.