TODAY NOV22
TEMPERATURE71°F
HUMIDITY28%
PRESSURENA inHg
WIND COND.58° 3.5 mph
  • 6536Sun
  • 7541Columbus Day
  • 7035Tue
  • 6634Wed
  • 6336Thu
daynightWeather update from ILLINOIS VALLEY AIRPORT, on 07 Oct 12:52 pm PDT

O'Brien 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
January26°F75°F45°F2.4"
February27°F77°F46°F1.6"
March28°F72°F46°F2.0"
April32°F83°F48°F2.0"
May36°F101°F53°F0.8"
June41°F94°F57°F0.7"
July46°F108°F59°Fn/a
August43°F96°F58°F0.0"
September40°F99°F58°F0.2"
October35°F85°F55°F3.3"
November31°F77°F50°F10.1"
December24°F70°F45°F7.0"

Did you know?

  • The highest monthly average temperature in O'Brien for July is 59 degrees.
  • The lowest monthly average temperature in O'Brien for December is 45 degrees.
  • The most monthly precipitation in O'Brien occurs in November with 10.1 inches.
  • The air quality index in O'Brien is 25% better than the national average.
  • The pollution index in O'Brien is 171% worse than the national average.

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Compare O'Brien, OR Weather To Other Cities

O'Brien 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.
IndexO'BrienOregonNational
Air quality index373250
Pollution index13,842,6005,436,2275,100,859

O'Brien air quality information

MeasurementTotal
Days measured365
Days with good air quality231
Days with moderate air quality115
Days w/ poor A.Q. for sensitive groups6
Days with unhealthy air quality8

O'Brien air quality information

PollutantTotal
Arsenic0.020%
Benzene0.210%
Carbon Tetrachloride0.030%
Lead0.030%
Mercury0.020%

Average monthly O'Brien temperature with heat index

O'Brien monthly precipitation with daily maximum

O'Brien monthly snow depth with daily maximum

O'Brien monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Kerby, OR3113726%
Selma, OR6533726%
Takilma, OR2663726%
Cave Junction, OR2,0593726%
O'Brien, OR1123726%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Port Colden, NJ1123922%
Los Corralitos, TX1123824%
Buck Run, PA1124314%
Morales-Sanchez, TX1123824%
Englewood, KS112688%
O'Brien, OR1123726%
Source: The O'Brien, OR 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.