Official 1981-2010 Climate Normals City: ROBINSON State: IL ID: 117345 Latitude: 39.0061 Longitude: -87.7769 Elevation: 535.0 ft Temperature-Related Pseudonormals For stations with short records, linear combinations of normals from nearby sites were used to compute so-called pseudonormals. Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 38.0 42.8 53.9 65.0 74.4 83.2 85.7 85.1 80.1 68.6 54.8 41.3 Mean: 29.1 33.0 43.3 54.2 63.9 73.0 75.7 74.2 67.3 56.0 44.5 32.5 Low: 20.2 23.2 32.6 43.4 53.3 62.7 65.7 63.3 54.4 43.4 34.2 23.6 CDD: 0 0 2 15 83 250 333 289 125 26 1 0 HDD: 1113 896 676 339 118 12 1 5 58 304 616 1008 Number of Days T090: 0.0 0.0 0.0 0.0 0.6 4.1 7.6 6.8 3.2 0.4 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T000: 2.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 T032: 25.5 23.1 15.7 2.5 0.1 0.0 0.0 0.0 0.1 3.4 14.0 24.6 ------------------------------------------------------------------------------------------ Annual Values High Temp: 64.5 F Mean Temp: 54.0 F Low Temp: 43.4 F Cooling DD: 1123 Heating DD: 5146 Days above 90 (T090): 22.7 Days above 100 (T100): 0.0 Days below 0 (T000): 2.9 Days below 32 (T032): 109.1 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.70 2.39 3.80 4.23 4.87 3.45 3.88 3.18 3.35 3.58 3.81 3.28 Number of Days P001: 8.3 7.7 10.4 9.7 12.3 9.5 9.8 6.9 6.5 8.2 8.4 9.8 P010: 5.1 4.8 6.6 7.8 8.5 6.4 7.0 4.9 5.0 5.0 6.0 6.9 P100: 0.8 0.6 1.3 1.0 1.2 1.1 1.1 1.0 1.3 1.4 0.9 0.7 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 42.52 inches Days precipitation at or above 0 inches (P000): 107.5 Days precipitation at or above 0.10 inches (P010): 74.0 Days Precipitation at or above 1.00 inches (P100): 12.4 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ KEY: High - average daily high temperature, degrees F Mean - average daily mean temperature, degrees F Low - average daily low temperature, degrees F CDD - cooling degree days, base 50F HDD - heating degree days, base 50F T090 - number of Days with Temperatures above 90 degrees F T100 - number of Days with Temperatures above 100 degrees F T000 - number of Days with Temperatures below 0 degrees F T032 - number of Days with Temperatures below 32 degrees F Prcp - precipitation, inches Snow - snowfall, inches P001 - number of Days with Precipitation of 0.01 inches or more P010 - number of Days with Precipitation of 0.10 inches or more P100 - number of Days with Precipitation of 1.00 inches or more S001 - number of Days with Snowfall of 0.1 inches or more S010 - number of Days with Snowfall of 1.0 inches or more S100 - number of Days with Snowfall of 10.0 inches or more Page Source: Dr. Jim Angel, State Climatologist Illinois State Water Survey Prairie Research Institute University of Illinois Data Source: NOAA National Climatic Data Center