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Year representations

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Downtown and University of Chicago

[edit]
Climate data for Chicago–Roanoke Building, downtown, 1875,[1] Dfb[2]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 44
(7) 		45
(7) 		73
(23) 		72
(22) 		79
(26) 		89
(32) 		88
(31) 		86
(30) 		87
(31) 		73
(23) 		59
(15) 		68
(20) 		89
(32)
Mean daily maximum °F (°C) 26.8
(−2.9) 		24.4
(−4.2) 		37.0
(2.8) 		51.6
(10.9) 		62.5
(16.9) 		70.3
(21.3) 		75.5
(24.2) 		75.0
(23.9) 		67.9
(19.9) 		55.4
(13.0) 		43.2
(6.2) 		42.5
(5.8) 		52.7
(11.5)
Mean daily minimum °F (°C) 5.5
(−14.7) 		4.9
(−15.1) 		25.0
(−3.9) 		34.9
(1.6) 		46.8
(8.2) 		55.6
(13.1) 		62.0
(16.7) 		61.2
(16.2) 		53.9
(12.2) 		40.8
(4.9) 		30.0
(−1.1) 		29.5
(−1.4) 		37.5
(3.1)
Record low °F (°C) −20
(−29) 		−13
(−25) 		9
(−13) 		17
(−8) 		27
(−3) 		40
(4) 		56
(13) 		52
(11) 		40
(4) 		30
(−1) 		0
(−18) 		−1
(−18) 		−20
(−29)
Average precipitation inches (mm) 0.96
(24) 		1.99
(51) 		1.43
(36) 		2.32
(59) 		3.64
(92) 		5.17
(131) 		7.18
(182) 		3.29
(84) 		4.39
(112) 		4.32
(110) 		0.75
(19) 		2.62
(67) 		38.06
(967)
Average precipitation days (≥ 0.01 in) 13 9 15 11 14 15 15 10 9 13 10 13 147
Source: NOAA
Climate data for Chicago–Roanoke Building, downtown, 1878,[3] Dfa[2]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 49
(9) 		55
(13) 		68
(20) 		75
(24) 		78
(26) 		85
(29) 		97
(36) 		91
(33) 		87
(31) 		79
(26) 		57
(14) 		46
(8) 		97
(36)
Mean daily maximum °F (°C) 37.3
(2.9) 		41.6
(5.3) 		51.8
(11.0) 		59.3
(15.2) 		61.6
(16.4) 		71.5
(21.9) 		81.6
(27.6) 		80.4
(26.9) 		74.7
(23.7) 		60.1
(15.6) 		49.9
(9.9) 		29.3
(−1.5) 		58.3
(14.6)
Mean daily minimum °F (°C) 26.2
(−3.2) 		31.3
(−0.4) 		38.8
(3.8) 		45.6
(7.6) 		48.9
(9.4) 		59.1
(15.1) 		69.0
(20.6) 		67.7
(19.8) 		57.8
(14.3) 		45.5
(7.5) 		38.1
(3.4) 		18.4
(−7.6) 		45.5
(7.5)
Record low °F (°C) −1
(−18) 		17
(−8) 		25
(−4) 		36
(2) 		38
(3) 		50
(10) 		59
(15) 		57
(14) 		43
(6) 		27
(−3) 		31
(−1) 		−9
(−23) 		−9
(−23)
Average precipitation inches (mm) 1.31
(33) 		2.12
(54) 		4.39
(112) 		5.57
(141) 		5.22
(133) 		3.02
(77) 		6.09
(155) 		3.66
(93) 		1.99
(51) 		5.17
(131) 		0.83
(21) 		2.58
(66) 		41.95
(1,067)
Average precipitation days (≥ 0.01 in) 15 15 16 13 14 12 10 15 10 16 10 20 166
Source: NOAA
Climate data for Chicago–U.S. Court House, downtown, 1921,[4] Cwa
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 56
(13) 		66
(19) 		78
(26) 		81
(27) 		93
(34) 		95
(35) 		97
(36) 		91
(33) 		88
(31) 		79
(26) 		65
(18) 		57
(14) 		97
(36)
Mean daily maximum °F (°C) 37.7
(3.2) 		38.7
(3.7) 		55.3
(12.9) 		62.5
(16.9) 		69.1
(20.6) 		80.1
(26.7) 		87.9
(31.1) 		78.3
(25.7) 		76.6
(24.8) 		61.7
(16.5) 		45.9
(7.7) 		38.6
(3.7) 		61.0
(16.1)
Mean daily minimum °F (°C) 27.1
(−2.7) 		28.2
(−2.1) 		36.2
(2.3) 		45.9
(7.7) 		54.3
(12.4) 		67.5
(19.7) 		74.5
(23.6) 		67.2
(19.6) 		63.5
(17.5) 		47.8
(8.8) 		35.6
(2.0) 		26.4
(−3.1) 		47.8
(8.8)
Record low °F (°C) 8
(−13) 		17
(−8) 		19
(−7) 		28
(−2) 		39
(4) 		49
(9) 		67
(19) 		61
(16) 		51
(11) 		36
(2) 		22
(−6) 		8
(−13) 		8
(−13)
Average precipitation inches (mm) 0.97
(25) 		0.38
(9.7) 		4.00
(102) 		4.47
(114) 		0.80
(20) 		1.57
(40) 		1.87
(47) 		4.92
(125) 		5.72
(145) 		3.26
(83) 		3.51
(89) 		4.63
(118) 		36.10
(917)
Average snowfall inches (cm) 3.2
(8.1) 		0.3
(0.76) 		trace 0.4
(1.0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		trace 1.6
(4.1) 		4.2
(11) 		9.7
(25)
Average precipitation days (≥ 0.01 in) 9 6 19 14 10 6 3 14 16 12 13 12 134
Average snowy days (≥ 0.1 in) 4 3 0 4 0 0 0 0 0 0 4 6 21
Source: NOAA

Midway Airport (KMDW)

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Climate data for Chicago–Midway, 1955,[5] Dwa
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 48
(9) 		51
(11) 		70
(21) 		83
(28) 		92
(33) 		94
(34) 		100
(38) 		99
(37) 		95
(35) 		79
(26) 		71
(22) 		55
(13) 		100
(38)
Mean daily maximum °F (°C) 31.4
(−0.3) 		36.1
(2.3) 		46.6
(8.1) 		67.8
(19.9) 		75.1
(23.9) 		78.6
(25.9) 		91.5
(33.1) 		88.7
(31.5) 		78.2
(25.7) 		65.2
(18.4) 		44.7
(7.1) 		33.0
(0.6) 		61.4
(16.3)
Mean daily minimum °F (°C) 18.3
(−7.6) 		21.4
(−5.9) 		27.7
(−2.4) 		46.2
(7.9) 		52.4
(11.3) 		59.5
(15.3) 		71.1
(21.7) 		68.7
(20.4) 		57.5
(14.2) 		45.7
(7.6) 		27.2
(−2.7) 		18.6
(−7.4) 		42.9
(6.0)
Record low °F (°C) −10
(−23) 		−8
(−22) 		5
(−15) 		34
(1) 		40
(4) 		50
(10) 		61
(16) 		55
(13) 		44
(7) 		32
(0) 		3
(−16) 		2
(−17) 		−10
(−23)
Average precipitation inches (mm) 1.49
(38) 		1.83
(46) 		1.72
(44) 		2.01
(51) 		3.86
(98) 		3.04
(77) 		2.84
(72) 		5.35
(136) 		1.47
(37) 		5.37
(136) 		1.46
(37) 		0.52
(13) 		30.96
(785)
Average snowfall inches (cm) 6.5
(17) 		6.5
(17) 		5.2
(13) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		trace 5.9
(15) 		2.1
(5.3) 		26.2
(67)
Average precipitation days (≥ 0.01 in) 9 11 11 12 11 12 12 5 4 14 12 5 118
Average snowy days (≥ 0.1 in) 7 4 7 0 0 0 0 0 0 0 5 3 26
Source: NOAA
Climate data for Chicago–Midway, 1962,[6] Dwa
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 42
(6) 		50
(10) 		72
(22) 		88
(31) 		94
(34) 		95
(35) 		93
(34) 		96
(36) 		94
(34) 		86
(30) 		66
(19) 		63
(17) 		96
(36)
Mean daily maximum °F (°C) 25.4
(−3.7) 		32.3
(0.2) 		41.2
(5.1) 		59.6
(15.3) 		77.0
(25.0) 		80.9
(27.2) 		79.9
(26.6) 		84.3
(29.1) 		73.7
(23.2) 		65.8
(18.8) 		49.6
(9.8) 		32.5
(0.3) 		58.5
(14.7)
Mean daily minimum °F (°C) 10.7
(−11.8) 		19.3
(−7.1) 		28.0
(−2.2) 		40.1
(4.5) 		57.1
(13.9) 		60.9
(16.1) 		64.3
(17.9) 		65.1
(18.4) 		54.7
(12.6) 		48.8
(9.3) 		35.1
(1.7) 		17.5
(−8.1) 		41.8
(5.4)
Record low °F (°C) −12
(−24) 		−4
(−20) 		−5
(−21) 		26
(−3) 		39
(4) 		51
(11) 		53
(12) 		53
(12) 		42
(6) 		23
(−5) 		27
(−3) 		−7
(−22) 		−12
(−24)
Average precipitation inches (mm) 2.53
(64) 		1.81
(46) 		1.82
(46) 		1.56
(40) 		2.90
(74) 		2.56
(65) 		4.65
(118) 		0.85
(22) 		0.77
(20) 		1.38
(35) 		1.09
(28) 		0.30
(7.6) 		22.22
(565.6)
Average snowfall inches (cm) 20.1
(51) 		13.3
(34) 		7.0
(18) 		0.3
(0.76) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0.3
(0.76) 		0.4
(1.0) 		4.3
(11) 		45.7
(116.52)
Average precipitation days (≥ 0.01 in) 12 18 14 11 12 8 9 5 8 10 10 9 126
Average snowy days (≥ 0.1 in) 12 15 11 1 0 0 0 0 0 1 2 10 52
Source: NOAA
Climate data for Chicago–Midway, 1963,[7] Dwa
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 42
(6) 		50
(10) 		79
(26) 		82
(28) 		91
(33) 		97
(36) 		99
(37) 		94
(34) 		92
(33) 		94
(34) 		70
(21) 		59
(15) 		99
(37)
Mean daily maximum °F (°C) 20.7
(−6.3) 		28.0
(−2.2) 		50.0
(10.0) 		62.6
(17.0) 		69.0
(20.6) 		84.4
(29.1) 		83.8
(28.8) 		82.4
(28.0) 		77.8
(25.4) 		75.8
(24.3) 		54.0
(12.2) 		25.8
(−3.4) 		59.5
(15.3)
Mean daily minimum °F (°C) 5.9
(−14.5) 		10.3
(−12.1) 		33.0
(0.6) 		42.2
(5.7) 		48.3
(9.1) 		62.3
(16.8) 		66.2
(19.0) 		62.7
(17.1) 		57.3
(14.1) 		52.8
(11.6) 		36.8
(2.7) 		9.9
(−12.3) 		40.6
(4.8)
Record low °F (°C) −18
(−28) 		−7
(−22) 		16
(−9) 		30
(−1) 		32
(0) 		46
(8) 		55
(13) 		49
(9) 		45
(7) 		36
(2) 		23
(−5) 		−9
(−23) 		−18
(−28)
Average precipitation inches (mm) 1.01
(26) 		0.54
(14) 		2.44
(62) 		4.79
(122) 		2.17
(55) 		2.39
(61) 		7.31
(186) 		2.15
(55) 		2.63
(67) 		0.62
(16) 		1.21
(31) 		0.76
(19) 		28.02
(714)
Average snowfall inches (cm) 21.0
(53) 		11.2
(28) 		5.4
(14) 		trace 0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		trace 7.9
(20) 		45.5
(116)
Average precipitation days (≥ 0.01 in) 10 9 15 9 8 7 6 6 6 4 8 8 96
Average snowy days (≥ 0.1 in) 12 10 5 0 0 0 0 0 0 0 0 7 34
Source: NOAA
Climate data for Chicago–Midway, 1977,[8] Dwa
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 30
(−1) 		60
(16) 		72
(22) 		88
(31) 		95
(35) 		97
(36) 		99
(37) 		93
(34) 		86
(30) 		74
(23) 		75
(24) 		60
(16) 		99
(37)
Mean daily maximum °F (°C) 18.3
(−7.6) 		34.4
(1.3) 		53.0
(11.7) 		65.9
(18.8) 		81.2
(27.3) 		80.4
(26.9) 		87.9
(31.1) 		80.1
(26.7) 		73.5
(23.1) 		60.5
(15.8) 		47.3
(8.5) 		31.9
(−0.1) 		59.5
(15.3)
Mean daily minimum °F (°C) 1.9
(−16.7) 		19.5
(−6.9) 		36.3
(2.4) 		43.2
(6.2) 		57.3
(14.1) 		59.0
(15.0) 		69.0
(20.6) 		63.6
(17.6) 		58.1
(14.5) 		43.1
(6.2) 		33.9
(1.1) 		17.5
(−8.1) 		41.9
(5.5)
Record low °F (°C) −19
(−28) 		−5
(−21) 		19
(−7) 		25
(−4) 		31
(−1) 		42
(6) 		55
(13) 		52
(11) 		50
(10) 		33
(1) 		4
(−16) 		−7
(−22) 		−19
(−28)
Average precipitation inches (mm) 0.72
(18) 		0.72
(18) 		3.91
(99) 		2.46
(62) 		1.39
(35) 		5.14
(131) 		1.40
(36) 		9.68
(246) 		9.44
(240) 		1.66
(42) 		2.40
(61) 		2.37
(60) 		41.29
(1,048)
Average snowfall inches (cm) 19.9
(51) 		8.4
(21) 		10.0
(25) 		0.5
(1.3) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		6.3
(16) 		19.2
(49) 		64.3
(163.3)
Average precipitation days (≥ 0.01 in) 13 7 13 12 8 8 9 19 12 12 13 8 134
Average snowy days (≥ 0.1 in) 16 9 5 1 0 0 0 0 0 0 3 9 43
Source: NOAA

O'Hare Airport (KORD)

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Climate data for Chicago–O'Hare, 2008,[9] Dfa
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 65
(18) 		47
(8) 		60
(16) 		82
(28) 		81
(27) 		91
(33) 		90
(32) 		90
(32) 		94
(34) 		84
(29) 		73
(23) 		61
(16) 		94
(34)
Mean daily maximum °F (°C) 32.0
(0.0) 		29.7
(−1.3) 		42.5
(5.8) 		59.8
(15.4) 		66.2
(19.0) 		80.9
(27.2) 		83.8
(28.8) 		81.8
(27.7) 		75.2
(24.0) 		61.6
(16.4) 		46.3
(7.9) 		31.5
(−0.3) 		57.6
(14.2)
Mean daily minimum °F (°C) 14.9
(−9.5) 		16.4
(−8.7) 		27.2
(−2.7) 		39.1
(3.9) 		44.8
(7.1) 		60.7
(15.9) 		64.2
(17.9) 		63.6
(17.6) 		57.1
(13.9) 		43.7
(6.5) 		32.2
(0.1) 		14.2
(−9.9) 		39.8
(4.3)
Record low °F (°C) −5
(−21) 		−4
(−20) 		14
(−10) 		28
(−2) 		38
(3) 		52
(11) 		52
(11) 		56
(13) 		48
(9) 		31
(−1) 		17
(−8) 		−6
(−21) 		−6
(−21)
Average precipitation inches (mm) 1.93
(49) 		3.53
(90) 		2.63
(67) 		2.72
(69) 		4.10
(104) 		4.18
(106) 		4.76
(121) 		3.73
(95) 		13.63
(346) 		2.07
(53) 		1.81
(46) 		5.77
(147) 		50.86
(1,293)
Average snowfall inches (cm) 12.7
(32) 		21.8
(55) 		7.9
(20) 		trace 0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		trace 0.6
(1.5) 		21.9
(56) 		64.9
(165)
Average precipitation days (≥ 0.01 in) 16 14 10 12 9 13 12 6 9 9 11 17 138
Average snowy days (≥ 0.1 in) 11 14 7 0 0 0 0 0 0 0 4 13 49
Source: NOAA
Climate data for Chicago–O'Hare, 2012,[10] Cfa
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 57
(14) 		59
(15) 		87
(31) 		77
(25) 		97
(36) 		100
(38) 		103
(39) 		95
(35) 		90
(32) 		78
(26) 		70
(21) 		70
(21) 		103
(39)
Mean daily maximum °F (°C) 38.5
(3.6) 		40.2
(4.6) 		63.3
(17.4) 		59.8
(15.4) 		76.5
(24.7) 		85.5
(29.7) 		91.5
(33.1) 		84.0
(28.9) 		74.5
(23.6) 		60.5
(15.8) 		49.0
(9.4) 		42.5
(5.8) 		63.8
(17.7)
Mean daily minimum °F (°C) 21.9
(−5.6) 		25.6
(−3.6) 		43.6
(6.4) 		41.6
(5.3) 		54.6
(12.6) 		62.4
(16.9) 		70.6
(21.4) 		62.6
(17.0) 		53.7
(12.1) 		42.4
(5.8) 		32.0
(0.0) 		29.7
(−1.3) 		45.1
(7.3)
Record low °F (°C) 5
(−15) 		10
(−12) 		21
(−6) 		32
(0) 		43
(6) 		49
(9) 		63
(17) 		53
(12) 		37
(3) 		32
(0) 		17
(−8) 		14
(−10) 		5
(−15)
Average precipitation inches (mm) 1.86
(47) 		1.64
(42) 		2.68
(68) 		1.65
(42) 		4.38
(111) 		0.90
(23) 		3.66
(93) 		2.07
(53) 		1.76
(45) 		3.15
(80) 		0.95
(24) 		2.21
(56) 		26.91
(684)
Average snowfall inches (cm) 12.2
(31) 		5.6
(14) 		0.3
(0.76) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		0
(0) 		trace 0.9
(2.3) 		19.0
(48)
Average precipitation days (≥ 0.01 in) 12 11 7 10 10 6 9 8 8 12 6 10 109
Average snowy days (≥ 0.1 in) 10 5 1 0 0 0 0 0 0 0 0 5 21
Source: NOAA

Extremes by month with date of occurrence

[edit]

Highest daily temperatures

[edit]

Daily record warm minima

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Highest averages

[edit]

Highest snow

[edit]
Period Record most snowfall Year
Year 95.3 in (242 cm) 1978
Seasonal (July–June) 89.7 in (228 cm) 1978–79
Spring (March–May) 29.7 in (75 cm) 1926
Autumn (September–November) 14.8 in (38 cm) 1940
Winter (December–February) 80.6 in (205 cm) 1978–79
January 42.5 in (108 cm) 1918
February 29.0 in (74 cm) 2011
March 23.1 in (59 cm) 1926
April 13.6 in (35 cm) 1938
May 2.2 in (5.6 cm) 1940
June–September 0 –
October 6.3 in (16 cm) 1989
November 14.8 in (38 cm) 1940
December 33.3 in (85 cm) 1951
  1. ^ 1875
    • Coldest annual mean
    • Coldest annual mean maximum
    • Lowest annual ceiling
    • Coldest February mean minimum
  2. ^ a b Snow records not maintained in Chicago until Jun 1884
  3. ^ 1878
    • Highest annual measurable precipitation days
  4. ^ 1921:
    • Warmest annual mean
    • Warmest annual mean minimum
    • Highest annual floor
    • Warmest monthly mean minimum
    • Warmest monthly floor
  5. ^ 1955:
    • Hottest monthly mean temp
    • Hottest monthly mean maximum
  6. ^ 1962:
    • Lowest annual precipitation
  7. ^ 1963:
    • Lowest annual measurable precipitation days
    • Warmest October mean and mean maximum
    • October record high
  8. ^ 1977:
    • Coldest month (all 3 average metrics)
    • Coldest monthly ceiling
    • Warmest May by mean temp and mean maximum
  9. ^ 2008:
    • Highest annual precipitation
  10. ^ 2012:
    • Warmest annual mean maximum
    • Warmest March (all 3 average metrics)
  11. ^ a b c d "NOWData - NOAA Online Weather Data". NOAA. Retrieved 27 June 2020. {{cite web}}: Cite has empty unknown parameter: |1= (help)
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