Weather History for Helena, MT

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Week of September 22, 2013 through September 28, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 70 °F 58 °F 47 °F
Mean Temperature 59 °F 49 °F 42 °F
Min Temperature 47 °F 40 °F 28 °F
Degree Days  
Heating Degree Days (base 65) 23 16 6 112
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 10 2 0 16
Dew Point  
Dew Point 46 °F 35 °F 26 °F
Precipitation  
Precipitation 0.63 in 0.14 in 0.00 in 1.01 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 30 mph 7 mph 0 mph
Gust Wind 37 mph 23 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.13 in 29.88 in 29.59 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Sep. 27, 2013 Rise Set
Actual Time 7:21 AM MDT 7:15 PM MDT
Civil Twilight 6:51 AM MDT 7:45 PM MDT
Nautical Twilight 6:16 AM MDT 8:20 PM MDT
Astronomical Twilight 5:40 AM MDT 8:56 PM MDT
Moon 12:00 AM MDT (9/27) 3:14 PM MDT (9/27)
Length of Visible Light 12h 53m
Length of Day
11h 53m
Last Quarter, 44% of the Moon is Illuminated
Sep 27
Last Quarter
Oct 4
New
Oct 11
First Quarter
Oct 18
Full
Oct 26
Last Quarter

Daily Weather History & Observations

2013 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
22 70 59 47 46 39 33 77 55 32 29.74 29.65 29.59 10 10 7 22 7 28 0.03 Rain
23 64 53 42 40 34 26 83 54 25 29.97 29.89 29.74 10 10 10 30 8 37 0.00  
24 53 47 41 45 37 32 93 71 48 29.96 29.89 29.82 10 9 3 10 3 14 0.63 Rain
25 51 46 40 42 39 36 93 85 76 29.85 29.78 29.71 10 10 6 21 8 24 0.32 Rain
26 47 43 39 37 34 31 86 73 60 30.11 30.01 29.83 10 10 4 17 9 21 0.03 Rain
27 55 42 28 33 30 27 92 67 41 30.13 30.04 29.97 10 10 2 20 6 25 0.00  
28 63 53 43 39 35 31 70 53 36 29.96 29.88 29.73 10 10 10 22 7 29 0.00