MAY CHICAGO NORMALS FOR TEMPERATURE, PRECIPITATION, SNOWFALL (1981-2010)

JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC

Day of Month	High	Low	Average	HDD	CDD	Precipitation	Snowfall
1	65	44	54	11	0	0.11	0.0
2	66	44	55	11	0	0.12	0.0
3	66	45	55	10	1	0.12	0.0
4	66	45	56	10	1	0.11	0.0
5	67	45	56	10	1	0.12	0.0
6	67	45	56	10	1	0.11	0.0
7	67	46	56	9	1	0.12	0.0
8	68	46	57	9	1	0.11	0.0
9	68	46	57	9	1	0.12	0.0
10	68	47	57	9	1	0.12	0.0
11	69	47	58	8	1	0.11	0.0
12	69	47	58	8	1	0.12	0.0
13	69	47	58	8	1	0.12	0.0
14	69	48	59	8	1	0.12	0.0
15	70	48	59	7	1	0.12	0.0
16	70	48	59	7	1	0.12	0.0
17	70	49	59	7	1	0.12	0.0
18	71	49	60	7	1	0.13	0.0
19	71	49	60	6	2	0.12	0.0
20	71	49	60	6	2	0.12	0.0
21	72	50	61	6	2	0.13	0.0
22	72	50	61	6	2	0.12	0.0
23	72	50	61	6	2	0.13	0.0
24	73	51	62	5	2	0.11	0.0
25	73	51	62	5	2	0.12	0.0
26	73	51	62	5	2	0.11	0.0
27	74	52	62	5	2	0.12	0.0
28	74	52	63	5	2	0.12	0.0
29	74	52	63	4	2	0.12	0.0
30	74	53	64	4	3	0.12	0.0
31	75	53	64	4	3	0.12	0.0
MONTH	70.0	48.3	59.1	225	44	3.68	T

HDD = A Heating Degree Day represents the number of degree(s) that the mean temperature for the day is below 65 degrees during a day.

CDD = A Cooling Degree Day represents the number of degree(s) that the mean temperature for the day is above 65 degrees during a day.

CHICAGO O'HARE CURRENT AND HISTORY (3-DAY) ... | NWS Chicago Office OBSERVED WEATHER REPORTS

Chicago Temperature and Precipitation Records for May

JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC

MAY RECORD HIGHS…LOWS…PRECIPITATION…AND SNOW FOR CHICAGO

Day	Record High Temp/Year	Record Low Max/Year	Record High Min/Year	Record Low Temp/Year	Record Precipitation Daily/Year	Record Snow Daily/Year
1	90/1951	38/1909	68/1899	30/1943	2.35/1873	1.6/1940
2	91/1959	37/1940	65/2001	27/1875	1.28/2008	0.6/1940
3	92/1955	41/1935	68/1959	30/2004	1.59/1919	1.3/1907
4	92/1952	41/1907	66/1955	32/1954	1.70/1990	T/1907
5	94/1949	43/1978	70/1959	32/1992	1.66/1892	------
6	91/1949	42/1989	66/1965	30/1992	1.41/1941	0.5/1989
7	87/1964	43/1931	68/1880	29/1989	2.07/1998	T/1989
8	91/1963	42/1960	67/1963	29/1983	1.26/1880	0.5/1923
9	94/1934	42/1966	69/1934	27/1983	3.14/1990	0.1/1923
10	90/2011	39/1981	69/1896	28/1983	2.84/1951	T/1945
11	89/1982	41/1907	70/1881	33/1981	3.30/1966	0.2/1966
12	92/1956	43/1912	66/1956	31/1981	2.67/1935	T/1923
13	89/1991	43/1953	72/1956	34/1996	1.49/2010	T/1953
14	92/1982	40/1895	68/1962	32/1895	1.95/1945	T/1973
15	91/1962	44/1904	71/1962	35/2016	2.31/1915	------
16	94/1962	44/1891	69/1962	33/1997	1.38/1974	------
17	94/1962	45/2002	70/1977	36/2002	1.38/1986	------
18	93/1962	45/1900	72/1996	34/2002	1.36/1926	T/1894
19	94/1977	41/1895	74/1911	36/1993	1.53/1949	------
20	95/1977	40/1895	70/1977	33/2002	2.54/1975	------
21	92/1977	42/1883	71/1921	31/2002	1.16/1974	T/2004
22	94/1925	44/1917	75/1977	36/2006	1.62/1983	T/1917
23	92/1977	50/1931	71/1964	37/1917	1.23/1995	T/1889
24	93/1950	44/1925	68/1991	34/1992	1.62/1927	T/1925
25	94/1911	44/1893	72/1914	32/1992	2.52/1879	T/1924
26	94/1911	48/1961	75/1914	34/1983	1.78/1913	T/1889
27	97/2012	49/1895	75/1911	33/1992	1.80/1939	------
28	95/2012	47/1884	77/2012	33/1992	1.76/1908	------
29	95/1942	46/1889	71/1991	37/1984	3.45/1981	------
30	93/1953	42/1889	72/1921	35/1873	1.49/2004	------
31	98/1934	43/1889	72/1919	35/1873	1.81/1942	------

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