Weather History for Helena, MT

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Week of April 14, 2013 through April 20, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 58 °F 44 °F 34 °F
Mean Temperature 47 °F 34 °F 27 °F
Min Temperature 37 °F 24 °F 17 °F
Degree Days  
Heating Degree Days (base 65) 38 31 18 215
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 34 °F 19 °F 8 °F
Precipitation  
Precipitation 0.14 in 0.05 in 0.00 in 0.14 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 36 mph 10 mph 0 mph
Gust Wind 45 mph 24 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.47 in 30.14 in 29.73 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Apr. 20, 2013 Rise Set
Actual Time 6:31 AM MDT 8:23 PM MDT
Civil Twilight 5:59 AM MDT 8:55 PM MDT
Nautical Twilight 5:19 AM MDT 9:35 PM MDT
Astronomical Twilight 4:36 AM MDT 10:18 PM MDT
Moon 2:52 PM MDT (4/20) 3:42 AM MDT (4/20)
Length of Visible Light 14h 56m
Length of Day
13h 51m
Waxing Gibbous, 71% of the Moon is Illuminated
Apr 20
Waxing Gibbous
Apr 25
Full
May 2
Last Quarter
May 9
New
May 17
First Quarter

Daily Weather History & Observations

2013 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Apr high avg low high avg low high avg low high avg low high avg low high avg high sum  
14 34 28 22 27 21 15 100 77 54 30.13 29.88 29.73 10 5 1 22 9 26 0.14 Snow
15 34 27 20 16 14 10 77 58 39 30.30 30.15 29.93 10 10 10 22 11 29 0.00  
16 35 27 19 18 14 9 77 57 36 30.45 30.33 30.14 10 10 9 22 12 28 T  
17 41 31 20 18 14 8 77 54 30 30.47 30.39 30.27 10 10 4 15 6 22 T Snow
18 53 35 17 20 17 11 77 52 27 30.37 30.29 30.22 10 10 10 24 9 31 0.00  
19 53 45 37 34 28 20 76 59 41 30.19 29.99 29.85 10 10 8 25 11 31 T Rain
20 58 47 36 32 27 22 62 45 28 30.05 29.95 29.88 10 10 10 36 14 45 T