TODAY SEP19
TEMPERATURE76
HUMIDITY79
PRESSURE29.99
WIND COND.
  • 9274Thu
  • 9064Fri20%60%
  • 7562Sat20%20%
  • 7463Sun40%30%
  • 7965Mon50%30%
daynightWeather update from Louisville, Standiford Field at
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Portland 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
January27°F45°F35°F3.7"
February29°F47°F37°F2.9"
March39°F60°F48°F4.5"
April48°F71°F59°F6.3"
May57°F79°F68°F5.7"
June66°F87°F77°F5.3"
July69°F89°F79°F5.6"
August68°F89°F78°F3.7"
September61°F83°F71°F4.6"
October48°F71°F59°F4.4"
November38°F59°F48°F3.5"
December31°F48°F39°F4.8"

Did you know?

  • The highest monthly average temperature in Portland for July is 79 degrees.
  • The lowest monthly average temperature in Portland for January is 35 degrees.
  • The most monthly precipitation in Portland occurs in April with 6.3 inches.
  • The air quality index in Portland is 10% worse than the national average.
  • The pollution index in Portland is 100% worse than the national average.

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Portland 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.
IndexPortlandLouisvilleKentucky
Air quality index555545
Pollution index10,162,70010,162,7005,222,664

Portland air quality information

MeasurementTotal
Days measured365
Days with good air quality138
Days with moderate air quality209
Days w/ poor A.Q. for sensitive groups18
Days with unhealthy air quality

Portland air quality information

PollutantTotal
Arsenic0.010%
Benzene0.060%
Carbon Tetrachloride0.010%
Lead0.050%
Mercury0.140%

Average monthly Portland temperature with heat index

Portland monthly precipitation with daily maximum

Portland monthly snow depth with daily maximum

Portland monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Crandall, IN1955510%
Greenville, IN6455510%
New Middletown, IN315510%
Audubon Park, KY1,4495510%
Bellemeade, KY7625510%
Louisville, KY611,5735510%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Las Vegas, NV613,295548%
Oklahoma City, OK620,015476%
Portland, OR620,5893824%
Baltimore, MD621,000468%
Milwaukee, WI598,6724510%
Louisville, KY611,5735510%
Source: The Portland, Louisville, KY 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.