National Weather Service United States Department of Commerce

Heat Continues in the Northeast and Northwest U.S.; Areas of Flash Flooding In the Ohio Valley and Southwest

Dangerous heat will continue to impact portions of the interior Northwest and Northeast U.S. Some relief is expected by Wednesday for the Northeast. Monsoon showers and thunderstorms may result in flash flooding and debris flows from the Four Corners region into the Great Basin this week. Thunderstorms, some severe, may produce excessive rainfall from the Ohio Valley to the Central Appalachians. Read More >

New 30 Year Climate Normals (1991 - 2020)

 

The 30-year normals are updated once every 10 years by the National Centers for Environmental Information (NCEI). Some of the popular variables calculated include: temperature, precipitation and snowfall that are listed here for our primary climate stations of Buffalo, Rochester and Watertown. The data displayed here is from NCEI which is the official source of climate normals. Further information on the new climate normals, including additional locations across the country can be found from NCEI at this weblink.

         

                             
Key                            
                             
Warmer   Increase     Old = 1981 - 2010          
Cooler   Decrease     New = 1991 - 2020          
No Change   No Change                    

 

       
BUFFALO                            
                             
Max Temperature   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
°F Old 31.2 33.3 42.0 55.0 66.5 75.3 79.9 78.4 71.1 59.0 47.6 36.1 56.4
  New 32.1 33.3 41.8 54.7 67.4 75.6 80.2 79.0 72.3 59.6 47.8 37.2 56.8
    0.9 0.0 -0.2 -0.3 0.9 0.3 0.3 0.6 1.2 0.6 0.2 1.1 0.4
                             
Min Temperature   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
°F Old 18.5 19.2 26.0 36.8 47.4 57.3 62.3 60.8 53.4 42.7 33.9 24.1 40.3
  New 19.0 19.5 26.4 36.5 48.3 58.1 63.1 61.7 54.5 43.9 34.2 25.6 40.9
    0.5 0.3 0.4 -0.3 0.9 0.8 0.8 0.9 1.1 1.2 0.3 1.5 0.6
                             
Mean Temp   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
°F Old 24.9 26.3 34.0 45.9 56.9 66.3 71.1 69.6 62.2 50.8 40.7 30.1 48.3
  New 25.5 26.4 34.1 45.6 57.9 66.9 71.7 70.4 63.4 51.7 41.0 31.4 48.8
    0.6 0.1 0.1 -0.3 1.0 0.6 0.6 0.8 1.2 0.9 0.3 1.3 0.5
                             
Precipitation   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
(inches) Old 3.18 2.49 2.87 3.01 3.46 3.66 3.23 3.26 3.90 3.52 4.01 3.89 40.48
  New 3.35 2.49 2.89 3.37 3.37 3.37 3.23 3.23 4.10 4.03 3.50 3.75 40.68
    0.17 0.00 0.02 0.36 -0.09 -0.29 0.00 -0.03 0.20 0.51 -0.51 -0.14 0.20
                             
Snow   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
(inches) Old 25.3 17.3 12.9 2.7 0.3 0.0 0.0 0.0 0.0 0.9 7.9 27.4 94.7
  New 26.7 18.1 14.1 2.5 0.0 0.0 0.0 0.0 0.0 0.9 7.8 25.3 95.4
    1.4 0.8 1.2 -0.2 -0.3 0.0 0.0 0.0 0.0 0.0 -0.1 -2.1 0.7
                             

 

     
                             
                             
Rochester                            
                             
Max Temperature   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
°F Old 31.7 34.1 42.8 56.0 67.6 76.6 81.0 79.1 71.6 59.6 48.0 36.5 57.2
  New 33.4 35.2 43.6 56.6 69.4 77.9 82.5 80.5 73.6 61.2 49.1 38.5 58.4
    1.7 1.1 0.8 0.6 1.8 1.3 1.5 1.4 2.0 1.6 1.1 2.0 1.2
                             
Min Temperature   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
°F Old 17.6 18.6 25.8 36.6 46.3 55.9 60.7 59.5 52.0 41.5 33.0 23.5 39.3
  New 19.0 19.6 26.8 37.1 48.2 57.4 62.2 61.0 53.6 43.3 34.0 25.4 40.6
    1.4 1.0 1.0 0.5 1.9 1.5 1.5 1.5 1.6 1.8 1.0 1.9 1.3
                             
Mean Temp   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
°F Old 24.7 26.4 34.3 46.3 57.0 66.2 70.8 69.3 61.8 50.6 40.5 30.0 48.2
  New 26.2 27.4 35.2 46.8 58.8 67.6 72.3 70.7 63.6 52.2 41.5 32.0 49.5
    1.5 1.0 0.9 0.5 1.8 1.4 1.5 1.4 1.8 1.6 1.0 2.0 1.3
                             
Precipitation   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
(inches) Old 2.41 1.95 2.50 2.73 2.87 3.34 3.33 3.47 3.38 2.72 2.94 2.63 34.27
  New 2.55 2.13 2.49 2.99 2.86 3.37 3.56 3.31 3.18 3.22 2.76 2.67 35.09
    0.14 0.18 -0.01 0.26 -0.01 0.03 0.23 -0.16 -0.20 0.50 -0.18 0.04 0.82
                             
Snow   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
(inches) Old 28.2 21.5 16.3 3.9 0.4 0.0 0.0 0.0 0.0 0.1 7.3 21.8 99.5
  New 27.4 23.1 17.9 3.0 0.1 0.0 0.0 0.0 0.0 0.1 8.1 22.3 102.0
    -0.8 1.6 1.6 -0.9 -0.3 0.0 0.0 0.0 0.0 0.0 0.8 0.5 2.5
                             

 

     
                             
Watertown                          
                             
Max Temperature   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
°F Old 29.3 31.7 40.7 54.5 65.8 74.4 79.2 78.0 70.4 58.2 46.8 35.0 55.3
  New 29.8 31.4 40.0 53.7 66.2 74.5 79.2 78.2 71.2 58.4 46.6 35.5 55.4
    0.5 -0.3 -0.7 -0.8 0.4 0.1 0.0 0.2 0.8 0.2 -0.2 0.5 0.1
                             
Min Temperature   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
°F Old 9.4 10.4 20.5 33.2 43.4 52.6 58.1 56.3 48.5 38.3 29.7 17.8 34.9
  New 10.0 10.7 20.7 32.5 43.7 53.1 58.8 56.7 48.8 39.2 29.5 19.0 35.2
    0.6 0.3 0.2 -0.7 0.3 0.5 0.7 0.4 0.3 0.9 -0.2 1.2 0.3
                             
Mean Temp   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
°F Old 19.4 21.1 30.6 43.9 54.6 63.5 68.6 67.1 59.5 48.3 38.3 26.4 45.1
  New 19.9 21.1 30.4 43.1 55.0 63.8 69.0 67.5 60.0 48.8 38.0 27.3 45.3
    0.5 0.0 -0.2 -0.8 0.4 0.3 0.4 0.4 0.5 0.5 -0.3 0.9 0.2
                             
Precipitation   Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
(inches) Old 2.67 2.22 2.30 2.90 3.07 2.85 2.65 3.15 3.72 3.65 3.76 3.15 36.09
  New 2.86 2.18 2.37 3.07 2.97 3.09 3.01 3.20 3.56 4.22 3.40 3.14 37.07
    0.19 -0.04 0.07 0.17 -0.10 0.24 0.36 0.05 -0.16 0.57 -0.36 -0.01 0.98
                             

 

     
                             
Key                            
                             
Warmer   Increase     Old = 1981 - 2010          
Cooler   Decrease     New = 1991 - 2020          
No Change   No Change