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Climate Normals

What is considered “normal” for a location’s climate at a particular time? The National Centers for Environmental Information (NCEI) calculates the official U.S. Climate Normals from observations captured by weather stations. Climate normals are derived by averaging 30 years of weather data; the latest iteration uses the period of 1991-2020. The Rhode Island State Climate Office primarily references monthly climate normals. Hourly, daily, and annual climate normals are also available for select locations.

Monthly Climate Normals

Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       4.12"  
Coventry 2 (COOP) 36.4 18.4 27.4 4.47"  
Kingston (COOP) 40.2 20.8 30.5 4.24" 10.0"
Kingston 1 W (COOP) 37.4 19.3 28.3 4.17  
Kingston 1 NW (COOP) 37.6 20.0 28.8 4.15  
Newport Rose (COOP) 38.6 23.9 31.3 4.03" 5.5"
Newport State Airport 38.1 24.1 31.1 3.21"  
North Foster (COOP) 34.8 18.5 26.6 4.49" 15.5"
R.I. T.F. Green Int'l Airport 38.3 22.1 30.2 3.96" 10.3"
Tiverton (COOP) 38.5 23.6 31.0 4.01" 10.9"
Westerly State Airport 39.5 24.5 32.0 3.34"  
Woonsocket (COOP) 37.8 18.8 28.3 4.37" 12.3"
Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       3.61"  
Coventry 2 (COOP) 38.5 20.3 29.4 3.45"  
Kingston (COOP) 42.5 22.0 32.2 3.77" 9.9"
Kingston 1 W (COOP) 39.1 20.7 29.9 3.85"  
Kingston 1 NW (COOP) 39.1 20.7 29.9 3.85"  
Newport Rose (COOP) 40.0 25.1 32.6 3.57" 9.1"
Newport State Airport 39.7 25.1 32.4 2.81" (driest)  
North Foster (COOP) 37.8 19.9 28.9 3.91" 15.6"
R.I. T.F. Green Int'l Airport 40.5 23.5 32.0 3.44" 10.5"
Tiverton (COOP) 41.3 24.5 32.9 3.84" 11.3"
Westerly State Airport 41.2 25.7 33.4 2.75" (driest)  
Woonsocket (COOP) 39.9 21.1 30.5 3.67" 10.7"
Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       5.12" (wettest)  
Coventry 2 (COOP) 47.0 25.6 36.3 5.03"  
Kingston (COOP) 49.1 28.3 38.7 5.59" (wettest) 6.2"
Kingston 1 W (COOP) 46.2 27.2 36.7 5.69" (wettest)  
Kingston 1 NW (COOP) 46.3 27.7 37.0 5.73" (wettest)  
Newport Rose (COOP) 45.9 31.7 38.8 4.61" 4.8"
Newport State Airport 45.7 30.8 38.3 4.57" (wettest)  
North Foster (COOP) 45.7 26.9 36.3 5.21" 13.4"
R.I. T.F. Green Int'l Airport 47.7 30.2 38.9 4.90" (wettest) 6.4"
Tiverton (COOP) 49.0 30.3 39.7 5.55" (wettest) 7.4"
Westerly State Airport 47.2 32.0 39.6 4.17"  
Woonsocket (COOP) 47.3 28.2 37.8 4.89" 7.6"
Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       3.89"  
Coventry 2 (COOP) 60.5 36.3 48.4 4.72"  
Kingston (COOP) 59.7 37.1 48.4 4.90" 1.1"
Kingston 1 W (COOP) 56.4 35.7 46.0 4.50"  
Kingston 1 NW (COOP) 56.2 36.3 46.3 4.51"  
Newport Rose (COOP) 55.2 39.7 47.5 4.73" (wettest) 1.3"
Newport State Airport 55.5 39.3 47.4 3.81"  
North Foster (COOP) 57.7 36.7 47.2 4.68" 2.6"
R.I. T.F. Green Int'l Airport 58.9 39.6 49.3 4.29" 0.6"
Tiverton (COOP) 60.0 39.3 49.6 4.50" 0.6"
Westerly State Airport 57.1 40.7 48.9 3.90"  
Woonsocket (COOP) 59.8 38.0 48.9 4.71" 1.9"
Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       3.53"  
Coventry 2 (COOP) 71.0 47.4 59.2 3.62"  
Kingston (COOP) 69.7 46.6 58.2 3.81" 0.0"
Kingston 1 W (COOP) 65.9 45.1 55.5 3.58  
Kingston 1 NW (COOP) 65.8 46.2 56.0 3.50  
Newport Rose (COOP) 64.8 48.6 56.7 3.91" 0.0"
Newport State Airport 65.0 48.5 56.8 3.03"  
North Foster (COOP) 68.0 46.5 57.2 3.78" 0.0"
R.I. T.F. Green Int'l Airport 68.9 49.2 59.1 3.37" 0.0"
Tiverton (COOP) 70.1 49.0 59.6 3.57" 0.0"
Westerly State Airport 66.6 50.0 58.3 3.32"  
Woonsocket (COOP) 69.9 47.9 58.9 3.64" 0.0"
Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       3.78"  
Coventry 2 (COOP) 79.6 56.9 68.3 4.11"  
Kingston (COOP) 78.0 55.9 66.9 4.11" 0.0"
Kingston 1 W (COOP) 74.6 54.3 64.5 3.99"  
Kingston 1 NW (COOP) 74.3 55.5 64.9 3.90"  
Newport Rose (COOP) 71.6" 57.7 64.7 3.17" 0.0"
Newport State Airport 73.9 57.8 65.8 3.41"  
North Foster (COOP) 75.5 55.6 65.6 4.52" 0.0"
R.I. T.F. Green Int'l Airport 77.7 58.8 68.2 3.81" 0.0"
Tiverton (COOP) 79.3 58.4 68.8 3.66" 0.0"
Westerly State Airport 75.0 59.4 67.2 3.55"  
Woonsocket (COOP) 78.5 57.3 67.9 4.26" 0.0"
Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       2.96" (driest)  
Coventry 2 (COOP) 85.0 63.6 74.3 3.21" (driest)  
Kingston (COOP) 83.3 61.8 72.6 3.30" (driest) 0.0"
Kingston 1 W (COOP) 80.3 60.4 70.3 3.31" (driest)  
Kingston 1 NW (COOP) 80.0 61.7 70.8 3.09" (driest)  
Newport Rose (COOP) 77.4 64.3 70.8 3.21" (driest) 0.0"
Newport State Airport 79.6 64.1 71.8 2.93"  
North Foster (COOP) 80.3 61.4 70.9 3.57" (driest) 0.0"
R.I. T.F. Green Int'l Airport 83.6 65.2 74.4 2.91" (driest) 0.0"
Tiverton (COOP) 84.9 65.0 74.9 2.96" (driest) 0.0"
Westerly State Airport 81.6 65.9 73.8 2.91"  
Woonsocket (COOP) 84.0 63.3 73.6 3.62" (driest) 0.0"
Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       4.20"  
Coventry 2 (COOP) 82.0 61.9 72.0 4.33"  
Kingston (COOP) 82.4 60.3 71.4 4.26" 0.0"
Kingston 1 W (COOP) 79.1 59.0 69.0 4.08"  
Kingston 1 NW (COOP) 78.8 60.0 69.4 4.10"  
Newport Rose (COOP) 78.0 64.1 71.1 3.29" 0.0"
Newport State Airport 78.8 63.6 71.2 3.41"  
North Foster (COOP) 78.8 60.1 69.4 4.51" 0.0"
R.I. T.F. Green Int'l Airport 82.2 63.9 73.0 3.59" 0.0"
Tiverton (COOP) 84.0 64.0 74.0 3.81" 0.0"
Westerly State Airport 80.5 64.3 72.4 3.49"  
Woonsocket (COOP) 82.5 61.7 72.1 4.01 0.0"
Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       4.06"  
Coventry 2 (COOP) 74.3 53.9 64.1 3.86"  
Kingston (COOP) 75.8 53.4 64.6 4.36" 0.0"
Kingston 1 W (COOP) 72.7 51.7 62.2 4.30"  
Kingston 1 NW (COOP) 72.4 52.8 62.6 4.30"  
Newport Rose (COOP) 72.9 59.2 66.1 3.82" 0.0"
Newport State Airport 72.3 57.1 64.7 3.44"  
North Foster (COOP) 71.7 53.0 62.3 4.40" 0.0"
R.I. T.F. Green Int'l Airport 74.8 56.5 65.6 4.17" 0.0"
Tiverton (COOP) 76.9 57.3 67.1 3.93" 0.0"
Westerly State Airport 74.4 57.1 65.7 3.81"  
Woonsocket (COOP) 75.4 54.4 64.9 4.17" 0.0"
Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       4.77"  
Coventry 2 (COOP) 62.3 42.2 52.3 5.27"  
Kingston (COOP) 65.2 42.4 53.8 4.98" 0.1"
Kingston 1 W (COOP) 62.4 41.1 51.7 4.49"  
Kingston 1 NW (COOP) 62.1 41.8 51.9 4.59"  
Newport Rose (COOP) 62.7 49.1 55.9 4.72" 0.0"
Newport State Airport 62.3 46.8 54.5 4.06"  
North Foster (COOP) 60.8 42.0 51.4 4.99" 0.5"
R.I. T.F. Green Int'l Airport 63.8 45.1 54.4 4.18" 0.2"
Tiverton (COOP) 64.3 46.6 55.4 4.54" 0.0"
Westerly State Airport 63.9 46.5 55.2 4.29" (wettest)  
Woonsocket (COOP) 63.9 42.0 52.9 5.08" 0.1"
Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       3.74"  
Coventry 2 (COOP) 51.5 32.1 41.8 4.40"  
Kingston (COOP) 54.5 33.8 44.1 4.49" 0.6"
Kingston 1 W (COOP) 52.0 31.1 42.0 4.38"  
Kingston 1 NW (COOP) 51.8 32.8 42.3 4.39"  
Newport Rose (COOP) 53.0 39.5 46.2 3.94" 0.1"
Newport State Airport 52.5 37.9 45.2 3.76"  
North Foster (COOP) 49.8 32.7 41.3 4.49" 2.0"
R.I. T.F. Green Int'l Airport 53.2 35.8 44.5 4.27" 1.0"
Tiverton (COOP) 52.7 37.0 44.8 4.11" 0.6"
Westerly State Airport 54.0 37.8 45.9 3.50"  
Woonsocket (COOP) 53.4 33.2 43.3 4.22" 1.0"
Station Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
Block Island (COOP)       4.62"  
Coventry 2 (COOP) 41.8 24.3 33.1 5.49" (wettest)  
Kingston (COOP) 45.2 26.3 35.8 5.33" 6.6"
Kingston 1 W (COOP) 42.9 25.0 33.9 5.23"  
Kingston 1 NW (COOP) 42.9 25.6 34.3 5.14"  
Newport Rose (COOP) 44.2 31.3 37.7 4.45" 5.2"
Newport State Airport 43.8 29.9 36.8 3.74"  
North Foster (COOP) 39.7 24.3 32.0 5.23" (wettest) 12.4"
R.I. T.F. Green Int'l Airport 43.4 27.6 35.5 4.65" 7.6"
Tiverton (COOP) 43.3 29.5 36.4 4.91" 7.3"
Westerly State Airport 44.9 30.3 37.6 3.77"  
Woonsocket (COOP) 43.0 24.6 33.8 5.27" (wettest) 7.9"

 

Hourly, Daily, and Annual Climate Normals

U.S. Climate Normals Quick Access Tool

 

Additional Resources

Many Community Collaborative Rain, Hail, and Snow (CoCoRaHS) sites across Rhode Island also have 30-year climate normals for daily, monthly, and annual precipitation. Visit NCEI’s U.S. Climate Normals Quick Access Tool or send us a data request to access this information.