TODAY APR18
TEMPERATURE52
HUMIDITY69
PRESSURE30.17
WIND COND.340 13
  • 7349Mon
  • 6837Tue
  • 6446Wed
  • 6958Thu20%
  • 7355Fri50%70%
daynightWeather update from McKinney - McKinney National Airport at

Key findings

  • The highest monthly average temperature in Allen for August is 83.3 degrees
  • The lowest monthly average temperature in Allen for January is 44 degrees
  • The most monthly precipitation in Allen occurs in January with 11.6 inches
  • The air quality index in Allen is 3% worse than the national average
  • The pollution index in Allen is 75% worse than the national average

Compare Allen, TX Weather

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      Allen 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
      January35°F54°F44°F11.6"
      February39°F60°F49°F2.6"
      March48°F70°F58°F6.5"
      April51°F73°F62°F5.8"
      May63°F81°F71°F8.0"
      June70°F90°F79°F11.0"
      July71°F92°F80°F4.1"
      August73°F96°F83°F1.9"
      September67°F91°F78°F4.9"
      October54°F80°F66°F6.8"
      November47°F70°F58°F4.2"
      December34°F60°F46°F5.3"

      Allen 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.
      IndexAllenTexasNational
      Air quality index515250
      Pollution index8,884,1904,642,9165,066,862

      Allen air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality181
      Days with moderate air quality155
      Days w/ poor A.Q. for sensitive groups28
      Days with unhealthy air quality1

      Allen air quality information

      PollutantTotal
      Arsenic0.030%
      Benzene0.070%
      Carbon Tetrachloride0.040%
      Lead0.260%
      Mercury0.020%

      Average monthly Allen temperature with heat index

      Allen monthly precipitation with daily maximum

      Allen monthly snow depth with daily maximum

      Allen monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Garland, TX234,810512%
      Plano, TX279,088512%
      Sachse, TX23,329512%
      Frisco, TX145,646512%
      Lowry Crossing, TX1,584512%
      Allen, TX94,710512%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Sparks, NV94,718468%
      Brockton, MA94,8134314%
      Livonia, MI94,8495612%
      Beaverton, OR94,8653824%
      League City, TX94,976524%
      Allen, TX94,710512%
      Source: The Allen, TX 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.