History for Chicago, IL

Saturday, August 18, 2012 — View Current Conditions

Saturday, August 18, 2012

	Actual	Average	Record
Temperature
Mean Temperature	65 °F	72 °F
Max Temperature	77 °F	82 °F	98 °F (1947)
Min Temperature	53 °F	63 °F	49 °F (1963)
Degree Days
Heating Degree Days	0	0
Month to date heating degree days	0	0
Since 1 June heating degree days	14	52
Since 1 July heating degree days	0	4
Cooling Degree Days	0	8
Month to date cooling degree days	140	151
Year to date cooling degree days	1108	653
Since 1 June cooling degree days	937	599
Growing Degree Days	15 (Base 50)
Moisture
Dew Point	51 °F
Average Humidity	67
Maximum Humidity	100
Minimum Humidity	33
Precipitation
Precipitation	0.00 in	0.17 in	2.85 in (1990)
Month to date precipitation	1.39	2.98
Year to date precipitation	18.16	23.21
Snow
Snow	0.00 in	0.00 in	0.00 in ()
Month to date snowfall	0.0	0.0
Since 1 June snowfall	0.0	0.0
Since 1 July snowfall	0.0	0.0
Snow Depth	0.00 in
Sea Level Pressure
Sea Level Pressure	29.99 in
Wind
Wind Speed	5 mph (SSE)
Max Wind Speed	14 mph
Max Gust Speed	25 mph
Visibility	10 miles
Events

T = Trace of Precipitation, MM = Missing Value

Source: NWS Daily Summary

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Astronomy

May. 24, 2013	Rise	Set
Actual Time	6:03 AM CDT	7:46 PM CDT
Civil Twilight	5:33 AM CDT	8:16 PM CDT
Nautical Twilight	4:57 AM CDT	8:52 PM CDT
Astronomical Twilight	4:18 AM CDT	9:30 PM CDT
Moon	7:13 AM CDT (8/18)	7:59 PM CDT (8/18)
Length Of Visible Light	14h 43m
Length of Day	13h 43m

New Moon, 1% of the Moon is Illuminated
Aug 18 New Moon	Aug 24 First Quarter	Aug 31 Full	Sep 8 Last Quarter	Sep 15 New

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Hourly Observations

Time (CDT)	Temp.	Dew Point	Humidity	Pressure	Visibility	Wind Dir	Wind Speed	Gust Speed	Precip	Conditions
12:51 AM	63.0 °F	55.0 °F	75%	30.01 in	10.0 mi	Calm	Calm	-	N/A	Partly Cloudy
1:51 AM	60.1 °F	55.0 °F	83%	30.01 in	10.0 mi	Calm	Calm	-	N/A	Clear
2:51 AM	59.0 °F	55.0 °F	87%	30.01 in	10.0 mi	Calm	Calm	-	N/A	Clear
3:51 AM	55.9 °F	53.1 °F	90%	30.02 in	10.0 mi	Calm	Calm	-	N/A	Clear
4:51 AM	57.0 °F	54.0 °F	89%	30.02 in	10.0 mi	Calm	Calm	-	N/A	Clear
5:51 AM	53.6 °F	53.6 °F	100%	30.03 in	10.0 mi	Calm	Calm	-	N/A	Scattered Clouds
6:51 AM	55.0 °F	53.1 °F	93%	30.03 in	10.0 mi	Calm	Calm	-	N/A	Scattered Clouds
7:51 AM	62.1 °F	54.0 °F	75%	30.04 in	10.0 mi	SSW	4.6 mph	-	N/A	Scattered Clouds
8:51 AM	64.4 °F	53.6 °F	68%	30.04 in	10.0 mi	SSW	4.6 mph	-	N/A	Scattered Clouds
9:51 AM	68.0 °F	53.1 °F	59%	30.03 in	10.0 mi	SE	3.5 mph	-	N/A	Mostly Cloudy
10:51 AM	70.0 °F	50.0 °F	49%	30.02 in	10.0 mi	South	6.9 mph	-	N/A	Mostly Cloudy
11:51 AM	72.0 °F	48.0 °F	43%	30.02 in	10.0 mi	SW	6.9 mph	-	N/A	Mostly Cloudy
12:51 PM	73.4 °F	48.2 °F	41%	30.00 in	10.0 mi	SSE	6.9 mph	-	N/A	Mostly Cloudy
1:51 PM	72.0 °F	48.0 °F	43%	29.98 in	10.0 mi	Calm	Calm	-	N/A	Mostly Cloudy
2:51 PM	75.0 °F	46.9 °F	37%	29.97 in	10.0 mi	SSW	3.5 mph	-	N/A	Mostly Cloudy
3:51 PM	75.0 °F	48.0 °F	38%	29.96 in	10.0 mi	SW	5.8 mph	-	N/A	Scattered Clouds
4:51 PM	77.0 °F	46.0 °F	33%	29.93 in	10.0 mi	West	5.8 mph	-	N/A	Scattered Clouds
5:51 PM	73.4 °F	48.2 °F	41%	29.93 in	10.0 mi	East	12.7 mph	-	N/A	Mostly Cloudy
6:51 PM	72.0 °F	50.0 °F	46%	29.94 in	10.0 mi	East	10.4 mph	-	N/A	Mostly Cloudy
7:51 PM	70.0 °F	50.0 °F	49%	29.94 in	10.0 mi	East	10.4 mph	-	N/A	Mostly Cloudy
8:51 PM	70.0 °F	50.0 °F	49%	29.95 in	10.0 mi	East	8.1 mph	-	N/A	Overcast
9:51 PM	70.0 °F	50.0 °F	49%	29.96 in	10.0 mi	East	8.1 mph	-	N/A	Overcast
10:51 PM	68.0 °F	50.0 °F	52%	29.96 in	10.0 mi	SE	5.8 mph	-	N/A	Overcast
11:51 PM	66.9 °F	50.0 °F	54%	29.96 in	10.0 mi	Calm	Calm	-	N/A	Overcast
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