Weather History for Mason City, IA

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Thursday, December 22, 2011

  Actual Average Record
Temperature  
Mean Temperature 20 °F 18 °F  
Max Temperature 30 °F 26 °F 55 °F (1941)
Min Temperature 9 °F 9 °F -22 °F (1983)
Degree Days  
Heating Degree Days 45 47  
Month to date heating degree days 899 976  
Since 1 July heating degree days 2352 2656  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 789 616  
Moisture  
Dew Point 16 °F    
Average Humidity 73    
Maximum Humidity 85    
Minimum Humidity 60    
Precipitation  
Precipitation 0.04 in 0.04 in 0.35 in (1938)
Month to date precipitation 0.77 0.94  
Year to date precipitation 21.90 34.90  
Snow  
Snow 0.50 in 0.30 in 4.50 in (1935)
Month to date snowfall 4.6 6.7  
Since 1 July snowfall 4.6 11.4  
Snow Depth 1.00 in    
Sea Level Pressure  
Sea Level Pressure 30.25 in    
Wind  
Wind Speed 12 mph (NNW)    
Max Wind Speed 20 mph    
Max Gust Speed 23 mph    
Visibility 10 miles    
Events Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 22, 2011 Rise Set
Actual Time 7:42 AM CST 4:41 PM CST
Civil Twilight 7:09 AM CST 5:14 PM CST
Nautical Twilight 6:33 AM CST 5:50 PM CST
Astronomical Twilight 5:59 AM CST 6:24 PM CST
Moon 5:26 AM CST (12/22) 2:52 PM CST (12/22)
Length of Visible Light 10h 04m
Length of Day
8h 59m
Waning Crescent, 5% of the Moon is Illuminated
Dec 22
Waning Crescent
Dec 24
New
Jan 1
First Quarter
Jan 9
Full
Jan 16
Last Quarter

Hourly Weather History & Observations

Time (CST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:31 AM 30.2 °F 19.3 °F 26.6 °F 86% 30.00 in 3.0 mi NNW 15.0 mph - 0.00 in Snow Light Snow
12:38 AM 30.2 °F 18.9 °F 26.6 °F 86% 30.00 in 5.0 mi NNW 16.1 mph - 0.00 in Snow Light Snow
12:53 AM 30.0 °F 18.3 °F 26.1 °F 85% 30.03 in 9.0 mi North 17.3 mph 23.0 mph 0.00 in   Overcast
1:53 AM 28.9 °F 18.6 °F 24.1 °F 82% 30.07 in 10.0 mi North 12.7 mph - N/A   Overcast
2:53 AM 28.0 °F 16.1 °F 23.0 °F 81% 30.12 in 10.0 mi North 16.1 mph - N/A   Mostly Cloudy
3:53 AM 27.0 °F 15.6 °F 21.0 °F 78% 30.13 in 10.0 mi North 13.8 mph - N/A   Mostly Cloudy
4:53 AM 25.0 °F 12.6 °F 19.9 °F 81% 30.16 in 10.0 mi North 15.0 mph - N/A   Partly Cloudy
5:53 AM 23.0 °F 11.1 °F 18.0 °F 81% 30.20 in 10.0 mi North 12.7 mph - N/A   Clear
6:53 AM 21.0 °F 9.9 °F 17.1 °F 85% 30.22 in 10.0 mi North 10.4 mph - N/A   Clear
7:53 AM 23.0 °F 9.6 °F 17.6 °F 80% 30.19 in 10.0 mi NNW 16.1 mph - N/A   Mostly Cloudy
8:53 AM 24.8 °F 14.6 °F 17.6 °F 74% 30.24 in 10.0 mi NNW 10.4 mph - N/A   Overcast
9:53 AM 24.1 °F 12.5 °F 18.0 °F 77% 30.30 in 10.0 mi NNW 12.7 mph - N/A   Overcast
10:53 AM 25.0 °F 11.7 °F 18.0 °F 75% 30.30 in 10.0 mi NNW 17.3 mph - N/A   Overcast
11:53 AM 25.0 °F 12.6 °F 18.0 °F 75% 30.31 in 10.0 mi North 15.0 mph - N/A   Overcast
12:53 PM 25.0 °F 12.6 °F 17.1 °F 72% 30.32 in 10.0 mi North 15.0 mph - N/A   Overcast
1:53 PM 25.0 °F 13.6 °F 16.0 °F 69% 30.32 in 10.0 mi North 12.7 mph - N/A   Overcast
2:49 PM 24.8 °F 11.9 °F 15.8 °F 69% 30.28 in 10.0 mi North 16.1 mph - N/A   Scattered Clouds
2:53 PM 26.1 °F 12.7 °F 15.1 °F 63% 30.32 in 10.0 mi NNW 18.4 mph 23.0 mph N/A   Partly Cloudy
3:53 PM 25.0 °F 12.2 °F 12.0 °F 58% 30.34 in 10.0 mi North 16.1 mph - N/A   Clear
4:53 PM 19.4 °F 7.2 °F 10.4 °F 68% 30.31 in 10.0 mi NNW 11.5 mph - N/A   Clear
5:53 PM 15.1 °F 5.2 °F 8.1 °F 74% 30.37 in 10.0 mi NNW 6.9 mph - N/A   Clear
6:53 PM 14.0 °F 2.9 °F 8.1 °F 77% 30.39 in 10.0 mi NW 8.1 mph - N/A   Clear
7:53 PM 10.4 °F -0.4 °F 5.0 °F 79% 30.34 in 10.0 mi WNW 6.9 mph - N/A   Clear
8:53 PM 10.0 °F - 5.0 °F 80% 30.40 in 10.0 mi North - - N/A   Clear
9:53 PM 10.9 °F 4.7 °F 5.0 °F 77% 30.40 in 10.0 mi West 3.5 mph - N/A   Clear
10:53 PM 10.9 °F 4.7 °F 7.0 °F 84% 30.40 in 10.0 mi SSW 3.5 mph - N/A   Clear
11:53 PM 10.9 °F - 7.0 °F 84% 30.40 in 10.0 mi Calm Calm - N/A   Clear