Weather History for Mason City, IA

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Monday, December 31, 2012

  Actual Average Record
Temperature  
Mean Temperature 8 °F 16 °F  
Max Temperature 19 °F 25 °F 52 °F (1965)
Min Temperature -4 °F 8 °F -25 °F (1898)
Degree Days  
Heating Degree Days 57 49  
Month to date heating degree days 1269 1409  
Since 1 July heating degree days 2871 3089  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 899 616  
Moisture  
Dew Point 4 °F    
Average Humidity 74    
Maximum Humidity 84    
Minimum Humidity 63    
Precipitation  
Precipitation 0.00 in 0.03 in 1.33 in (2006)
Month to date precipitation 1.52 1.24  
Year to date precipitation 20.45 35.20  
Snow  
Snow 0.00 in 0.30 in 5.00 in (1977)
Month to date snowfall 10.6 9.3  
Since 1 July snowfall 10.6 14.0  
Snow Depth 5.00 in    
Sea Level Pressure  
Sea Level Pressure 30.19 in    
Wind  
Wind Speed 13 mph (NW)    
Max Wind Speed 25 mph    
Max Gust Speed 31 mph    
Visibility 9 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 31, 2012 Rise Set
Actual Time 7:45 AM CST 4:48 PM CST
Civil Twilight 7:12 AM CST 5:20 PM CST
Nautical Twilight 6:36 AM CST 5:56 PM CST
Astronomical Twilight 6:02 AM CST 6:31 PM CST
Moon 8:25 PM CST (12/31) 9:21 AM CST (12/31)
Length of Visible Light 10h 07m
Length of Day
9h 03m
Waning Gibbous, 90% of the Moon is Illuminated
Dec 31
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

Hourly Weather History & Observations

Time (CST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 16.0 °F 1.1 °F 10.0 °F 77% 30.05 in 10.0 mi NW 15.0 mph - N/A   Clear
1:53 AM 15.1 °F -2.5 °F 9.0 °F 77% 30.06 in 10.0 mi NW 20.7 mph - N/A   Clear
2:53 AM 14.0 °F -3.4 °F 9.0 °F 80% 30.11 in 10.0 mi NW 19.6 mph - N/A   Clear
3:53 AM 12.9 °F -2.8 °F 9.0 °F 84% 30.12 in 7.0 mi NNW 15.0 mph - N/A   Partly Cloudy
4:07 AM 14.0 °F -2.5 °F 10.4 °F 86% 30.08 in 7.0 mi NNW 17.3 mph - N/A   Mostly Cloudy
4:53 AM 17.1 °F 1.0 °F 12.0 °F 81% 30.14 in 5.0 mi NW 18.4 mph - N/A   Haze
5:06 AM 15.8 °F -1.1 °F 12.2 °F 86% 30.10 in 5.0 mi NW 19.6 mph - N/A   Overcast
5:49 AM 15.8 °F -0.6 °F 10.4 °F 79% 30.11 in 7.0 mi NNW 18.4 mph - N/A   Partly Cloudy
5:53 AM 15.1 °F -2.5 °F 10.0 °F 80% 30.16 in 7.0 mi NNW 20.7 mph - N/A   Partly Cloudy
6:53 AM 12.9 °F -4.9 °F 6.1 °F 74% 30.18 in 10.0 mi NNW 19.6 mph - N/A   Clear
7:53 AM 12.9 °F -2.2 °F 6.1 °F 74% 30.19 in 10.0 mi NNW 13.8 mph - N/A   Mostly Cloudy
8:53 AM 14.0 °F -0.2 °F 7.0 °F 74% 30.19 in 8.0 mi NNW 12.7 mph - N/A   Overcast
9:16 AM 12.2 °F -3.1 °F 6.8 °F 79% 30.15 in 9.0 mi NNW 13.8 mph - N/A   Scattered Clouds
9:53 AM 12.9 °F -0.2 °F 7.0 °F 77% 30.21 in 10.0 mi NW 10.4 mph - N/A   Clear
10:53 AM 12.9 °F -1.6 °F 6.1 °F 74% 30.21 in 10.0 mi NNW 12.7 mph - N/A   Clear
11:41 AM 14.0 °F -1.4 °F 6.8 °F 73% 30.15 in 10.0 mi NW 15.0 mph - N/A   Partly Cloudy
11:53 AM 14.0 °F -1.4 °F 7.0 °F 74% 30.21 in 10.0 mi NNW 15.0 mph - N/A   Partly Cloudy
12:53 PM 15.1 °F -0.6 °F 6.1 °F 68% 30.20 in 10.0 mi NW 16.1 mph - N/A   Clear
1:53 PM 15.1 °F 0.5 °F 6.1 °F 68% 30.20 in 10.0 mi NW 13.8 mph - N/A   Clear
2:53 PM 12.0 °F -4.0 °F 3.0 °F 67% 30.22 in 10.0 mi NW 15.0 mph - N/A   Clear
3:53 PM 10.0 °F -4.5 °F -0.0 °F 64% 30.22 in 10.0 mi NW 11.5 mph - N/A   Clear
4:53 PM 8.1 °F -4.3 °F -0.0 °F 70% 30.22 in 10.0 mi NNW 8.1 mph - N/A   Clear
5:53 PM 5.0 °F -6.9 °F -2.9 °F 70% 30.24 in 10.0 mi NW 6.9 mph - N/A   Clear
6:53 PM 3.9 °F -10.4 °F -4.0 °F 70% 30.25 in 10.0 mi NNW 9.2 mph - N/A   Clear
7:53 PM 1.9 °F -13.8 °F -5.1 °F 72% 30.27 in 10.0 mi NNW 10.4 mph - N/A   Clear
8:53 PM 1.0 °F -6.7 °F -6.0 °F 72% 30.27 in 10.0 mi NNW 3.5 mph - N/A   Clear
9:53 PM -0.0 °F -14.2 °F -7.1 °F 72% 30.29 in 10.0 mi NW 8.1 mph - N/A   Clear
10:53 PM -0.9 °F -14.1 °F -7.1 °F 75% 30.31 in 10.0 mi NNW 6.9 mph - N/A   Clear
11:53 PM -4.0 °F -19.0 °F -9.0 °F 79% 30.31 in 10.0 mi NNW 8.1 mph - N/A   Clear