Weather History for Helena, MT

Change the Weather History Date:

Week of December 23, 2012 through December 29, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 34 °F 22 °F 12 °F
Mean Temperature 22 °F 15 °F 7 °F
Min Temperature 10 °F 7 °F 2 °F
Degree Days  
Heating Degree Days (base 65) 58 50 43 353
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 19 °F 7 °F -7 °F
Precipitation  
Precipitation 0.35 in 0.08 in 0.00 in 0.38 in
Snowdepth 4.0 in 2.9 in 0.0 in -
Wind  
Wind 20 mph 3 mph 0 mph
Gust Wind 24 mph 20 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.53 in 30.13 in 29.75 in

Weekly Weather History Graph

Weekly Weather History Graph

Search for Another Location

Airport:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

Dec. 29, 2012 Rise Set
Actual Time 8:12 AM MST 4:48 PM MST
Civil Twilight 7:37 AM MST 5:23 PM MST
Nautical Twilight 6:58 AM MST 6:02 PM MST
Astronomical Twilight 6:21 AM MST 6:38 PM MST
Moon 6:32 PM MST (12/29) 8:42 AM MST (12/29)
Length of Visible Light 9h 46m
Length of Day
8h 36m
Full, 98% of the Moon is Illuminated
Dec 29
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

Daily Weather History & Observations

2012 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
23 29 20 10 16 12 8 92 75 58 30.17 30.03 29.75 10 7 2 15 3 17 T Snow
24 16 9 2 12 0 -7 88 75 62 30.53 30.12 29.77 10 4 0 16 9 20 0.35 Fog , Snow
25 12 7 2 2 -1 -3 86 78 69 30.52 30.32 30.13 10 8 1 5 0 6 T Snow
26 18 13 7 12 8 2 83 78 73 30.11 29.95 29.76 9 5 2 3 0 5 0.03 Snow
27 21 15 8 14 10 5 92 83 73 30.15 30.04 29.86 10 4 0 6 1 7 0.00 Fog
28 34 22 10 19 14 8 96 71 45 30.27 30.18 29.94 10 9 5 20 5 24 0.00  
29 24 16 8 12 9 7 84 72 59 30.30 30.24 30.19 10 10 10 9 2 10 0.00