Daily Normals by Month

Temperatures (°F)

Note: The table header links take you to the new (1991–2020) average statistics.

Average Temperature Comparison
Average Period Jan Feb March April May June July Aug Sept Oct Nov Dec Annual
New 30-Year Average (1981-2010) 11.6 17.0 29.4 44.5 56.5 65.6 70.3 67.8 58.6 45.7 30.4 15.9 42.9
Old 30-Year Average (1971-2000) 8.8 16.1 28.4 43.6 56.6 65.1 69.8 67.2 57.4 45.3 28.8 14.4 41.8
Entire Record (1893-2010) 9.3 14.0 27.3 43.9 56.1 65.5 70.9 68.2 59.0 46.7 30.2 16.2 42.3
High Temperature Comparison
Average Period Jan Feb March April May June July Aug Sept Oct Nov Dec Annual
New 30-Year Average (1981-2010) 21.4 26.8 39.0 56.3 68.8 77.5 82.3 79.6 70.3 56.6 39.0 24.7 53.7
Old 30-Year Average (1971-2000) 18.7 25.7 37.7 54.9 69.0 77.3 81.7 78.9 69.0 56.3 37.3 23.2 52.5
Entire Record (1893-2010) 19.8 24.7 37.4 55.1 68.0 77.0 82.6 80.0 70.5 57.8 39.2 24.8 53.0
Low Temperature Comparison
Average Period Jan Feb March April May June July Aug Sept Oct Nov Dec Annual
New 30-Year Average (1981-2010) 1.8 7.2 19.8 32.7 44.2 53.6 58.4 56.0 46.8 34.9 21.7 7.1 32.1
Old 30-Year Average (1971-2000) -1.2 6.4 19.1 32.2 44.1 52.9 57.9 55.5 46.7 34.3 20.4 5.5 31.1
Entire Record (1893-2010) -0.2 3.9 17.7 32.7 44.2 53.9 59.1 56.5 47.4 35.9 21.9 7.1 31.6

Color Guide

  • New 30-Year Averages At Least 10% Warmer Than Old 30-Year
  • New Averages Warmer Than Old
  • New Averages Unchanged From Old
  • New Averages Colder
  • New Averages At Least 10% Colder

Precipitation (inches)

Note: The table header links take you to the new (1991–2020) average statistics.

Average Period Precipitation
Average Period Jan Feb March April May June July Aug Sept Oct Nov Dec Annual
New 30-Year Average (1981-2010) 0.65 0.59 1.55 2.57 2.95 4.17 3.31 3.79 3.46 2.49 1.38 0.82 27.73 (+2.5%)
Old 30-Year Average (1971-2000) 0.73 0.50 1.44 2.28 2.91 4.36 3.61 3.72 3.02 2.17 1.55 0.76 27.05
Entire Record (1893-2010) 0.75 0.72 1.35 2.26 3.36 4.31 3.38 3.61 3.06 2.09 1.23 0.71 26.73

Color Guide

  • New 30-Year Averages At Least 10% Wetter Than Old 30-Year
  • New Averages Wetter Than Old
  • New Averages Unchanged From Old
  • New Averages Drier
  • New Averages At Least 10% Drier

Snowfall (inches)

Average Period Snowfall
Average Period July Aug Sept Oct Nov Dec Jan Feb March April May June Cold Season
New 30-Year Average (1981-2010) 0.0 0.0 0.0 0.7 8.9 10.5 7.9 7.1 8.1 2.9 0.0 0.0 46.1 (-3.5%)
Old 30-Year Average (1971-2000) 0.0 0.0 0.0 0.6 9.1 8.6 10.1 7.2 8.5 2.9 0.2 0.0 47.2
Entire Record (1899-2011) 0.0 0.0 0.0 0.6 5.8 7.6 8.8 7.3 8.3 2.7 0.1 0.0 41.2

Color Guide

  • New 30-Year Averages At Least 10% Whiter Than Old 30-Year
  • New Averages Whiter Than Old
  • New Averages Unchanged From Old
  • New Averages Browner
  • New Averages At Least 10% Browner