Streamwood Cliamte Normals

Official 1981-2010 Climate Normals

City: STREAMWOOD
State: IL
ID: 118324
Latitude: 42.0256
Longitude: -88.1783
Elevation: 818.7 ft

Temperature-Related Normals

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 31.9 36.4 47.7 61.0 72.6 83.3 86.7 85.0 76.8 64.4 49.8 35.5
Mean: 21.3 25.0 35.3 46.9 57.8 68.4 72.6 71.1 62.4 50.6 38.2 25.0
Low: 10.6 13.5 22.8 32.9 42.9 53.5 58.6 57.2 47.9 36.8 26.5 14.6
CDD: 0 0 0 4 34 156 246 203 63 7 0 0
HDD: 1356 1121 922 545 259 54 9 14 143 454 806 1238

Number of Days
T090: 0.0 0.0 0.0 0.1 1.7 7.4 9.7 6.9 2.0 0.1 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.1 0.2 0.1 0.0 0.0 0.0 0.0
T000: 6.2 3.5 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.8
T032: 30.5 27.2 25.5 13.9 3.2 0.1 0.0 0.0 0.5 9.5 21.6 29.5
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Annual Values

High Temp: 61.0 F
Mean Temp: 48.0 F
Low Temp: 34.9 F
Cooling DD: 713
Heating DD: 6921

Days above 90 (T090): 27.8
Days above 100 (T100): 0.4
Days below 0 (T000): 13.8
Days below 32 (T032): 161.5
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Precipitation-Related Normals

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.71 1.62 2.30 3.15 4.31 3.92 4.29 4.67 3.60 3.30 3.03 2.07
Snow: 11.9 6.0 5.1 0.7 0.0 0.0 0.0 0.0 0.0 0.1 1.8 8.7

Number of Days
P001: 10.5 8.9 10.8 12.5 13.2 11.8 9.3 10.6 7.9 10.3 10.5 12.0
P010: 5.3 4.1 5.4 7.5 8.3 7.2 6.1 6.4 4.9 5.8 4.8 5.4
P100: 0.2 0.2 0.3 0.7 1.1 0.9 0.6 1.5 0.9 0.5 0.6 0.2
S001: 9.0 6.6 4.3 1.1 0.0 0.0 0.0 0.0 0.0 0.2 2.3 8.8
S010: 3.8 2.1 1.6 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.6 3.4
S100: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1
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Annual Values

Precipitation: 37.97 inches
Snowfall: 34.3 inches

Days precipitation at or above 0 inches (P000): 128.3
Days precipitation at or above 0.10 inches (P010): 71.2
Days Precipitation at or above 1.00 inches (P100): 7.7
Days Snowfall at or above 0.1 inches (S001): 32.3
Days Snowfall at or above 1.0 inches (S010): 11.9
Days Snowfall at or above 10.0 inches (S100): 0.1

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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