Summit Weather History Illinois, United States of America

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Past date: Past date must be from 1st Jan, 2009 onwards.

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Daily and hourly data from 1 Jan 2009 onwards.
Yearly Monthly Averages
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Mon 10 Aug, 2026 Weather in Summit

Sunrise: 05:54 AM Sunset: 07:58 PM	Moonrise: 02:33 AM Moonset: 06:42 PM	Max: 28.6 °c	Min: 21.2 °c	Avg: 24.3 °c	Precip: 15.95 mm	Max Wind: 14.8 kph

	Mon 10 0:00 am	Mon 10 3:00 am	Mon 10 6:00 am	Mon 10 9:00 am	Mon 10 12:00 pm	Mon 10 3:00 pm	Mon 10 6:00 pm	Mon 10 9:00 pm
Icon
Temp	23.1°c	21.5°c	21.2°c	23.7°c	27.3°c	26.6°c	28.0°c	22.6°c
Wind	13.3 kmph	13.6 kmph	8.6 kmph	0.7 kmph	1.8 kmph	4.0 kmph	9.7 kmph	8.6 kmph
Precip	0.00 mm	2.90 mm	0.00 mm	0.00 mm	0.00 mm	1.10 mm	0.00 mm	0.00 mm
Cloud	75%	82%	100%	88%	99%	80%	3%	75%
Humidity	90%	87%	91%	92%	88%	82%	89%	91%
Pressure	1011 mb	1011 mb	1012 mb	1013 mb	1013 mb	1013 mb	1011 mb	1013 mb

Summit Annual Weather Averages

Month	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
January	-1°C / 30°F	-7°C / 19°F	-4°C / 25°F	111 hours	53.95 mm / 2.12 In	8 days	1019 mb / 31 In
February	1°C / 34°F	-6°C / 22°F	-2°C / 28°F	111 hours	59.00 mm / 2.32 In	7 days	1019 mb / 31 In
March	8°C / 46°F	0°C / 33°F	4°C / 39°F	142 hours	92.44 mm / 3.64 In	7 days	1018 mb / 31 In
April	13°C / 56°F	5°C / 41°F	9°C / 48°F	142 hours	156.40 mm / 6.16 In	9 days	1014 mb / 30 In
May	19°C / 67°F	11°C / 52°F	15°C / 59°F	173 hours	128.99 mm / 5.08 In	9 days	1015 mb / 30 In
June	25°C / 77°F	17°C / 62°F	21°C / 70°F	208 hours	152.53 mm / 6.01 In	9 days	1013 mb / 30 In
July	28°C / 82°F	20°C / 68°F	24°C / 74°F	218 hours	113.28 mm / 4.46 In	8 days	1015 mb / 30 In
August	27°C / 81°F	19°C / 67°F	23°C / 73°F	243 hours	103.48 mm / 4.07 In	8 days	1015 mb / 30 In
September	24°C / 75°F	16°C / 61°F	20°C / 68°F	230 hours	76.74 mm / 3.02 In	6 days	1017 mb / 31 In
October	17°C / 62°F	10°C / 49°F	13°C / 55°F	182 hours	105.74 mm / 4.16 In	8 days	1016 mb / 30 In
November	9°C / 48°F	3°C / 37°F	6°C / 42°F	171 hours	72.80 mm / 2.87 In	5 days	1019 mb / 31 In
December	3°C / 37°F	-3°C / 27°F	0°C / 32°F	118 hours	70.55 mm / 2.78 In	7 days	1019 mb / 31 In

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