TODAY DEC11
TEMPERATURE52
HUMIDITY87
PRESSURE30.14
WIND COND.360 8.1
  • 4830Wed80%
  • 4535Thu
  • 5348Fri40%90%
  • 5844Sat70%30%
  • 5840Sun
daynightWeather update from Smithfield, Johnston County Airport at
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Smithfield 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
January34°F54°F42°F5.1"
February34°F57°F44°F4.7"
March41°F65°F52°F5.6"
April50°F75°F61°F6.5"
May58°F81°F69°F8.0"
June67°F89°F77°F7.6"
July70°F91°F79°F9.7"
August69°F89°F77°F6.7"
September63°F83°F71°F9.5"
October51°F74°F61°F3.5"
November41°F64°F51°F6.0"
December37°F58°F46°F6.5"

Did you know?

  • The highest monthly average temperature in Smithfield for July is 79 degrees.
  • The lowest monthly average temperature in Smithfield for January is 42 degrees.
  • The most monthly precipitation in Smithfield occurs in July with 9.7 inches.
  • The air quality index in Smithfield is 20% better than the national average.
  • The pollution index in Smithfield is 96% better than the national average.

Compare Smithfield, NC Weather To Other Cities

Smithfield 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.
IndexSmithfieldNorth CarolinaNational
Air quality index403550
Pollution index227,3213,848,9885,066,862

Smithfield air quality information

MeasurementTotal
Days measured359
Days with good air quality237
Days with moderate air quality122
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Smithfield air quality information

PollutantTotal
Arsenic0.000%
Benzene0.003%
Carbon Tetrachloride0.001%
Lead0.000%
Mercury0.000%

Average monthly Smithfield temperature with heat index

Smithfield monthly precipitation with daily maximum

Smithfield monthly snow depth with daily maximum

Smithfield monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Dunn, NC9,7623726%
Micro, NC6614020%
Pine Level, NC2,1434020%
Four Oaks, NC2,1504020%
Princeton, NC1,3434020%
Smithfield, NC11,7464020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Tucson Estates, AZ11,747468%
Douglas, GA11,7423236%
Lansdowne, VA11,742492%
Somersworth, NH11,7563628%
Los Alamos, NM11,733982%
Smithfield, NC11,7464020%
Source: The Smithfield, NC 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.
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