Official State of Rhode Island website

State of Rhode Island Department of Environmental Management

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

Month Precipitation (in.)
January 4.12"
February 3.61"
March 5.12" (wettest)
April 3.89"
May 3.53"
June 3.78"
July 2.96" (driest)
August 4.20"
September 4.06"
October 4.77"
November 3.74"
December 4.62"
Month Max. Temp. (°F) Min. Temp. (°F) Avg. Temp (°F) Precipitation (in.)
January 36.4 18.4 27.4 4.47"
February 38.5 20.3 29.4 3.45"
March 47.0 25.6 36.3 5.03"
April 60.5 36.3 48.4 4.72"
May 71.0 47.4 59.2 3.62"
June 79.6 56.9 68.3 4.11"
July 85.0 63.6 74.3 3.21" (driest)
August 82.0 61.9 72.0 4.33"
September 74.3 53.9 64.1 3.86"
October 62.3 42.2 52.3 5.27"
November 51.5 32.1 41.8 4.40"
December 41.8 24.3 33.1 5.49" (wettest)

Note: this weather station closed on September 5, 2023.

Month Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
January 40.2 20.8 30.5 4.24" 10.0"
February 42.5 22.0 32.2 3.77" 9.9"
March 49.1 28.3 38.7 5.59" (wettest) 6.2"
April 59.7 37.1 48.4 4.90" 1.1"
May 69.7 46.6 58.2 3.81" 0.0"
June 78.0 55.9 66.9 4.11" 0.0"
July 83.3 61.8 72.6 3.30" (driest) 0.0"
August 82.4 60.3 71.4 4.26" 0.0"
September 75.8 53.4 64.6 4.36" 0.0"
October 65.2 42.4 53.8 4.98" 0.1"
November 54.5 33.8 44.1 4.49" 0.6"
December 45.2 26.3 35.8 5.33" 6.6"
Month Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
January 38.6 23.9 31.3 4.03" 5.5"
February 40.0 25.1 32.6 3.57" 9.1"
March 45.9 31.7 38.8 4.61" 4.8"
April 55.2 39.7 47.5 4.73" (wettest) 1.3"
May 64.8 48.6 56.7 3.91" 0.0"
June 71.6" 57.7 64.7 3.17" 0.0"
July 77.4 64.3 70.8 3.21" (driest) 0.0"
August 78.0 64.1 71.1 3.29" 0.0"
September 72.9 59.2 66.1 3.82" 0.0"
October 62.7 49.1 55.9 4.72" 0.0"
November 53.0 39.5 46.2 3.94" 0.1"
December 44.2 31.3 37.7 4.45" 5.2"

Note: this weather station closed on December 31, 2003.

Month Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.)
January 38.1 24.1 31.1 3.21"
February 39.7 25.1 32.4 2.81" (driest)
March 45.7 30.8 38.3 4.57" (wettest)
April 55.5 39.3 47.4 3.81"
May 65.0 48.5 56.8 3.03"
June 73.9 57.8 65.8 3.41"
July 79.6 64.1 71.8 2.93"
August 78.8 63.6 71.2 3.41"
September 72.3 57.1 64.7 3.44"
October 62.3 46.8 54.5 4.06"
November 52.5 37.9 45.2 3.76"
December 43.8 29.9 36.8 3.74"
Month Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
January 34.8 18.5 26.6 4.49" 15.5"
February 37.8 19.9 28.9 3.91" 15.6"
March 45.7 26.9 36.3 5.21" 13.4"
April 57.7 36.7 47.2 4.68" 2.6"
May 68.0 46.5 57.2 3.78" 0.0"
June 75.5 55.6 65.6 4.52" 0.0"
July 80.3 61.4 70.9 3.57" (driest) 0.0"
August 78.8 60.1 69.4 4.51" 0.0"
September 71.7 53.0 62.3 4.40" 0.0"
October 60.8 42.0 51.4 4.99" 0.5"
November 49.8 32.7 41.3 4.49" 2.0"
December 39.7 24.3 32.0 5.23" (wettest) 12.4"
Month Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.) Snow (in.)
January 38.3 22.1 30.2 3.96" 10.3"
February 40.5 23.5 32.0 3.44" 10.5"
March 47.7 30.2 38.9 4.90" (wettest) 6.4"
April 58.9 39.6 49.3 4.29" 0.6"
May 68.9 49.2 59.1 3.37" 0.0"
June 77.7 58.8 68.2 3.81" 0.0"
July 83.6 65.2 74.4 2.91" (driest) 0.0"
August 82.2 63.9 73.0 3.59" 0.0"
September 74.8 56.5 65.6 4.17" 0.0"
October 63.8 45.1 54.4 4.18" 0.2"
November 53.2 35.8 44.5 4.27" 1.0"
December 43.4 27.6 35.5 4.65" 7.6"
Month Max. Temp. (°F) Min. Temp. (°F) Avg. Temp (°F) Precipitation (in.) Snow (in.)
January 38.5 23.6 31.0 4.01" 10.9"
February 41.3 24.5 32.9 3.84" 11.3"
March 49.0 30.3 39.7 5.55" (wettest) 7.4"
April 60.0 39.3 49.6 4.50" 0.6"
May 70.1 49.0 59.6 3.57" 0.0"
June 79.3 58.4 68.8 3.66" 0.0"
July 84.9 65.0 74.9 2.96" (driest) 0.0"
August 84.0 64.0 74.0 3.81" 0.0"
September 76.9 57.3 67.1 3.93" 0.0"
October 64.3 46.6 55.4 4.54" 0.0"
November 52.7 37.0 44.8 4.11" 0.6"
December 43.3 29.5 36.4 4.91" 7.3"

Note: this weather station closed on June 30, 2019.

Month Max. Temp. (°F) Min. Temp. (°F) Avg. Temp. (°F) Precipitation (in.)
January 39.5 24.5 32.0 3.34"
February 41.2 25.7 33.4 2.75" (driest)
March 47.2 32.0 39.6 4.17"
April 57.1 40.7 48.9 3.90"
May 66.6 50.0 58.3 3.32"
June 75.0 59.4 67.2 3.55"
July 81.6 65.9 73.8 2.91"
August 80.5 64.3 72.4 3.49"
September 74.4 57.1 65.7 3.81"
October 63.9 46.5 55.2 4.29" (wettest)
November 54.0 37.8 45.9 3.50"
December 44.9 30.3 37.6 3.77"
Month Max. Temp (°F) Min. Temp (°F) Avg. Temp (°F) Precipitation (in.) Snow (in.)
January 37.8 18.8 28.3 4.37" 12.3"
February 39.9 21.1 30.5 3.67" 10.7"
March 47.3 28.2 37.8 4.89" 7.6"
April 59.8 38.0 48.9 4.71" 1.9"
May 69.9 47.9 58.9 3.64" 0.0"
June 78.5 57.3 67.9 4.26" 0.0"
July 84.0 63.3 73.6 3.62" (driest) 0.0"
August 82.5 61.7 72.1 4.01 0.0"
September 75.4 54.4 64.9 4.17" 0.0"
October 63.9 42.0 52.9 5.08" 0.1"
November 53.4 33.2 43.3 4.22" 1.0"
December 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.