Temperature Data | Precipitation Data | Detailed Data

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Annual Climatology: Chicago, IL (ORD)

Elev: 658 ft    Lat: 41^o 59'N    Long: 87^o 55'W

Figure 1: Average Temperatures and Precipitation 1971-2000. (NCDC Data)

Temperature Data (^oF) :

Month	Daily Max	Daily Min	Mean	Maximum Daily Temperature	Minimum Daily Temperature
January	29.6	14.3	22.0	65	-27
February	34.7	19.2	27.0	72	-19
March	46.1	28.5	37.3	88	-8
April	58.0	37.6	47.8	91	7
May	69.9	47.5	58.7	93	24
June	79.2	57.2	68.2	104	36
July	83.5	63.2	73.3	104	40
August	81.2	62.2	71.7	101	41
September	73.9	53.7	63.8	99	28
October	62.1	42.1	52.1	91	17
November	47.1	31.6	39.3	78	1
December	34.4	20.4	27.4	71	-25
Annual	58.3	39.8	49.1	104	-27

Precipitation Data (in):

Month	Mean	Median	Extreme	Year	Snow*
January	1.75	1.45	4.47	1999	10.8
February	1.63	1.39	5.56	1997	8.3
March	2.65	2.28	5.91	1976	6.0
April	3.68	3.75	7.69	1983	1.6
May	3.38	3.02	6.95	1996	0.0
June	3.63	3.52	9.96	1993	0.0
July	3.51	3.58	8.33	1982	0.0
August	4.62	3.92	17.10	1987	0.0
September	3.27	2.99	8.14	1972	0.0
October	2.71	2.14	7.36	1991	0.3
November	3.01	2.50	8.22	1985	1.8
December	2.43	2.12	8.56	1982	8.7
Annual	36.27	36.13			37.5

* Snowfall totals represent mean snowfall 1971-2000

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