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Home > Climate > NWS Chicago > Climate Prediction > Local Temperature Outlook

Three-Month Temperature Outlook (Issued: May 2013)

National Outlook Local Outlook Background Information Questions and Feedback
CHICAGO OHARE INTL AP, IL
COOK County, Coop ID: 111549
Elevation: 658 ft.
Latitude: 41° 59' N Longitude: 87° 56' W 		NOAA Online Weather Data Help

Probability of Exceedance Table
  JJA JAS ASO SON OND NDJ DJF JFM FMA MAM AMJ MJJ JJA
**R 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
99% 66.7 66.5 59.3 48.6 34.5 23.5 18.7 23.2 32.9 43.2 54.6 62.7 66.7
98% 67.3 67.0 59.8 49.1 35.2 24.3 19.6 24.0 33.6 43.9 55.1 63.3 67.3
97% 67.7 67.3 60.1 49.4 35.6 24.9 20.2 24.6 34.0 44.3 55.4 63.6 67.7
96% 67.9 67.5 60.3 49.6 35.9 25.3 20.6 24.9 34.3 44.6 55.7 63.9 67.9
95% 68.2 67.7 60.5 49.8 36.2 25.6 21.0 25.3 34.6 44.9 55.9 64.1 68.2
90% 69.0 68.4 61.1 50.5 37.1 26.8 22.2 26.4 35.4 45.7 56.6 64.8 69.0
80% 69.9 69.2 61.9 51.3 38.2 28.2 23.7 27.7 36.5 46.8 57.4 65.7 69.9
70% 70.6 69.8 62.4 51.9 39.0 29.2 24.8 28.6 37.2 47.5 58.0 66.4 70.6
60% 71.2 70.2 62.9 52.3 39.7 30.1 25.7 29.4 37.9 48.2 58.5 66.9 71.2
50% 71.8 70.7 63.3 52.8 40.3 30.9 26.6 30.2 38.5 48.8 59.0 67.4 71.8
40% 72.4 71.2 63.7 53.3 40.9 31.7 27.5 31.0 39.1 49.4 59.5 67.9 72.4
30% 73.0 71.6 64.2 53.7 41.6 32.6 28.4 31.8 39.8 50.1 60.0 68.4 73.0
20% 73.7 72.2 64.7 54.3 42.4 33.6 29.5 32.7 40.5 50.8 60.6 69.1 73.7
10% 74.6 73.0 65.5 55.1 43.5 35.0 31.0 34.0 41.6 51.9 61.4 70.0 74.6
5% 75.4 73.7 66.1 55.8 44.4 36.2 32.2 35.1 42.4 52.7 62.1 70.7 75.4
4% 75.7 73.9 66.3 56.0 44.7 36.5 32.6 35.5 42.7 53.0 62.3 70.9 75.7
3% 75.9 74.1 66.5 56.2 45.0 36.9 33.0 35.8 43.0 53.3 62.6 71.2 75.9
2% 76.3 74.4 66.8 56.5 45.4 37.5 33.6 36.4 43.4 53.7 62.9 71.5 76.3
1% 76.9 74.9 67.3 57.0 46.1 38.3 34.5 37.2 44.1 54.4 63.4 72.1 76.9
*Mean 71.8 70.7 63.3 52.8 40.3 30.9 26.6 30.2 38.5 48.8 59.0 67.4 71.8
StDev 2.2 1.8 1.7 1.8 2.5 3.2 3.4 3.0 2.4 2.4 1.9 2.0 2.2

Color
Legend		Deviation from
Climatology
(deg F)
 < -2.5
 -2.0 thru -2.5
 -1.5 thru -2.0
 -1.0 thru -1.5
Color
Legend		Deviation from
Climatology
(deg F)
 -0.5 thru -1.0
 -0.5 > deg F < 0.5
 0.5 thru 1.0
 1.0 thru 1.5
Color
Legend		Deviation from
Climatology
(deg F)
 1.5 thru 2.0
 2.0 thru 2.5
 > 2.5
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Probability of Exceedance 		Three Category Calendar
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