TODAY NOV05
TEMPERATURE46
HUMIDITY76
PRESSURE102740
WIND COND.180 5.4
  • 6557Tue20%
  • 7251Wed
  • 6037Thu
  • 5637Fri
  • 4931Sat
daynightWeather update from Rochester - Skyhaven Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Union for July is 69.9 degrees
  • The lowest monthly average temperature in Union for January is 23.5 degrees
  • The most monthly precipitation in Union occurs in April with 13.1 inches
  • The air quality index in Union is 26% better than the national average
  • The pollution index in Union is 97% better than the national average

Compare Union, NH Weather

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      Union 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
      January16°F32°F23°F4.0"
      February14°F33°F24°F3.9"
      March22°F43°F32°F5.4"
      April35°F55°F45°F13.1"
      May44°F66°F54°F8.4"
      June54°F78°F66°F4.0"
      July59°F82°F70°F4.3"
      August58°F83°F70°F4.0"
      September52°F76°F63°F3.7"
      October44°F62°F53°F13.0"
      November31°F49°F39°F7.8"
      December19°F35°F27°F4.5"

      Union 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.
      IndexUnionNew HampshireNational
      Air quality index313442
      Pollution index91,7903,959,6182,726,193

      Union air quality

      MeasurementTotal
      Days measured316
      Days with good air quality308
      Days with moderate air quality8
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.000%
      Benzene0.002%
      Carbon Tetrachloride0.000%
      Lead0.001%
      Mercury0.000%

      Average monthly Union temperature with heat index

      Union monthly precipitation with daily maximum

      Union monthly snow depth with daily maximum

      Union monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Rochester, NH31,3052746.0%
      Alton, NH1703138.0%
      Milton, NH5373138.0%
      Farmington, NH4,1403138.0%
      Milton Mills, NH2163138.0%
      Union, NH2423138.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Port Costa, CA2424020.0%
      Orchard Hill, GA2423824.0%
      Talmo, GA2423726.0%
      Patterson, IA2423922.0%
      Wardner, ID2424314.0%
      Union, NH2423138.0%
      Source: The Union, NH 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.