Weather History for Helena, MT

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Week of October 21, 2012 through October 27, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 49 °F 38 °F 30 °F
Mean Temperature 37 °F 30 °F 26 °F
Min Temperature 28 °F 23 °F 19 °F
Degree Days  
Heating Degree Days (base 65) 39 35 28 242
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 34 °F 22 °F 13 °F
Precipitation  
Precipitation 0.19 in 0.06 in 0.00 in 0.29 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 17 mph 3 mph 0 mph
Gust Wind 21 mph - -
Sea Level Pressure  
Sea Level Pressure 30.60 in 30.11 in 29.64 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Oct. 25, 2012 Rise Set
Actual Time 8:00 AM MDT 6:22 PM MDT
Civil Twilight 7:29 AM MDT 6:53 PM MDT
Nautical Twilight 6:53 AM MDT 7:29 PM MDT
Astronomical Twilight 6:18 AM MDT 8:04 PM MDT
Moon 4:21 PM MDT (10/25) 3:47 AM MDT (10/25)
Length of Visible Light 11h 24m
Length of Day
10h 22m
Waxing Gibbous, 85% of the Moon is Illuminated
Oct 25
Waxing Gibbous
Oct 29
Full
Nov 6
Last Quarter
Nov 13
New
Nov 20
First Quarter

Daily Weather History & Observations

2012 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Oct high avg low high avg low high avg low high avg low high avg low high avg high sum  
21 49 37 24 23 19 13 75 50 25 30.03 29.96 29.91 10 10 10 10 3 13 0.00  
22 42 34 26 32 25 18 100 73 46 29.96 29.77 29.64 10 5 1 17 5 21 0.19 Snow
23 31 26 20 25 23 18 96 87 78 30.14 29.92 29.68 10 6 1 14 4 16 0.06 Snow
24 32 27 21 25 22 19 92 84 75 30.33 30.19 30.02 10 10 10 12 4 15 0.00  
25 30 26 22 21 17 15 88 71 53 30.60 30.44 30.23 10 8 2 12 6 14 T Snow
26 35 27 19 26 21 15 92 78 63 30.59 30.40 30.10 10 10 8 6 1 6 T Snow
27 44 36 28 34 29 25 92 77 62 30.22 30.11 29.97 10 8 1 8 1 10 0.04 Snow