TODAY JUN19
TEMPERATURE78
HUMIDITY42
PRESSURE29.98
WIND COND.340 6.9
  • 9558Wed
  • 9761Thu
  • 10166Fri
  • 10569Sat
  • 9862Sun
daynightWeather update from Modesto, Modesto City-County-Sham Field at

Grayson Average Weather

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
January23°F70°F46°F2.4"
February33°F75°F52°F2.0"
March34°F86°F56°F1.2"
April38°F99°F61°F1.3"
May43°F108°F70°F0.6"
June50°F111°F75°F0.1"
July56°F113°F81°F0.0"
August56°F107°F79°Fn/a
September45°F105°F73°F0.1"
October39°F98°F63°F0.7"
November31°F82°F55°F0.5"
December24°F70°F47°F2.0"

Did you know?

  • The highest monthly average temperature in Grayson for July is 81 degrees.
  • The lowest monthly average temperature in Grayson for January is 46 degrees.
  • The most monthly precipitation in Grayson occurs in January with 2.4 inches.
  • The air quality index in Grayson is 10% worse than the national average.
  • The pollution index in Grayson is 53% worse than the national average.

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Compare Grayson, CA Weather To Other Cities

Grayson 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.
IndexGraysonCaliforniaNational
Air quality index555550
Pollution index7,774,44018,106,7265,066,862

Grayson air quality information

MeasurementTotal
Days measured365
Days with good air quality164
Days with moderate air quality145
Days w/ poor A.Q. for sensitive groups45
Days with unhealthy air quality11

Grayson air quality information

PollutantTotal
Arsenic0.030%
Benzene0.090%
Carbon Tetrachloride0.000%
Lead0.050%
Mercury0.040%

Average monthly Grayson temperature with heat index

Grayson monthly precipitation with daily maximum

Grayson monthly snow depth with daily maximum

Grayson monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Ceres, CA47,2315510%
Diablo Grande, CA1,0795510%
Monterey Park Tract, CA3385510%
Riverbank, CA23,7615510%
Airport, CA1,6055510%
Grayson, CA9905510%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Krotz Springs, LA9904412%
Oil City, LA9904314%
Ackermanville, PA9903922%
Cotter, AR9903432%
New Bethlehem, PA9903628%
Grayson, CA9905510%
Source: The Grayson, 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.