Helena, MT

12:56 PM MDT on May 20, 2018 (GMT -0600)
Helena Regional

Weather History for KHLN - December, 2011

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Month of December, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 53 °F 36 °F 20 °F
Mean Temperature 42 °F 26 °F 7 °F
Min Temperature 31 °F 16 °F -7 °F
Degree Days  
Heating Degree Days (base 65) 58 39 23 1202
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 37 °F 17 °F -9 °F
Precipitation  
Precipitation 0.02 in 0.00 in 0.00 in 0.07 in
Snowdepth 1.0 in 0.4 in 0.0 in -
Wind  
Wind 45 mph 6 mph 0 mph
Gust Wind 62 mph 24 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.83 in 30.26 in 29.49 in

Monthly Weather History Graph

Monthly Weather History Graph

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Astronomy

Dec. 20, 2011 Rise Set
Actual Time 8:08 AM MST 4:42 PM MST
Civil Twilight 7:33 AM MST 5:17 PM MST
Nautical Twilight 6:54 AM MST 5:56 PM MST
Astronomical Twilight 6:18 AM MST 6:32 PM MST
Moon 3:25 AM MST 1:27 PM MST
Length of Visible Light 9h 44m
Length of Day
8h 33m
Waning Crescent, 20% of the Moon is Illuminated
Dec 20
Waning Crescent
Dec 24
New
Dec 31
First Quarter
Jan 9
Full
Jan 16
Last Quarter

Daily Weather History & Observations

2011 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  
1 29 19 8 18 13 9 88 73 57 30.83 30.61 30.15 10 10 10 12 2 13 0.00  
2 36 27 17 27 21 15 88 70 52 30.40 30.15 29.89 10 8 0 17 6 22 T Fog , Snow
3 30 20 10 24 15 9 100 75 50 30.41 30.28 30.12 10 7 0 22 7 28 0.01 Fog , Snow
4 27 14 0 25 14 -3 91 72 52 30.75 30.50 30.14 10 7 1 23 8 28 0.02 Snow
5 20 7 -7 6 0 -9 91 70 49 30.72 30.57 30.27 10 10 4 9 2 12 0.00  
6 34 21 8 17 11 4 83 67 50 30.48 30.42 30.36 10 10 10 12 3 15 0.00  
7 31 22 13 21 16 10 88 76 63 30.43 30.34 30.13 10 10 5 13 4 15 T Snow
8 24 15 5 16 12 4 92 80 68 30.44 30.39 30.20 10 10 8 9 2 12 0.00  
9 36 22 8 18 13 8 96 70 44 30.53 30.48 30.27 10 9 5 8 1 10 0.00  
10 34 21 7 18 13 6 92 72 51 30.48 30.29 29.99 10 10 7 8 1 8 0.00  
11 27 18 8 17 13 7 92 80 68 30.19 30.13 29.93 10 9 7 9 3 10 0.00  
12 28 20 12 20 17 10 88 76 63 30.27 30.18 30.01 10 10 3 9 4 12 T Snow
13 29 18 6 17 12 4 92 80 68 30.19 30.12 30.01 10 10 8 9 2 10 0.00  
14 38 31 24 26 22 16 85 66 47 30.21 30.12 29.84 10 10 10 18 4 24 T  
15 36 31 25 25 22 19 92 74 56 30.42 30.23 30.02 10 10 9 18 4 23 0.00  
16 43 37 31 27 22 18 59 53 46 30.45 30.41 30.29 10 10 10 28 10 33 0.00  
17 50 39 28 28 26 21 85 64 42 30.43 30.33 30.17 10 10 10 15 5 18 0.00  
18 38 30 21 28 23 19 85 70 54 30.31 30.13 29.95 10 10 6 15 5 17 T Snow
19 38 28 18 23 19 13 92 68 43 30.41 30.33 30.21 10 10 10 14 4 20 0.00  
20 42 32 22 24 19 12 63 50 37 30.22 30.05 29.89 10 10 10 32 11 44 0.00  
21 37 25 13 28 22 10 88 68 48 30.57 30.18 29.85 10 6 1 22 9 29 0.02 Snow
22 27 16 5 13 9 4 91 73 55 30.64 30.57 30.32 10 10 10 12 2 13 0.00  
23 37 23 8 15 10 5 91 63 35 30.65 30.59 30.42 10 10 9 17 3 21 0.00  
24 43 32 21 27 21 14 74 59 43 30.63 30.59 30.44 10 10 10 21 4 26 0.00  
25 44 33 22 22 20 15 84 59 33 30.56 30.25 29.92 10 10 10 25 5 39 0.00  
26 40 30 20 21 16 14 74 56 37 30.33 30.25 30.06 10 10 10 26 10 35 T  
27 45 33 20 26 20 15 81 61 41 30.22 30.12 29.93 10 10 10 24 6 31 0.00  
28 53 42 31 36 30 23 85 63 41 29.91 29.85 29.69 10 10 10 25 10 31 T  
29 50 40 29 36 22 16 82 59 36 30.01 29.80 29.56 10 10 10 45 17 62 T Rain
30 47 38 29 37 28 18 76 67 58 29.86 29.68 29.49 10 10 10 21 6 31 0.02 Rain
31 36 29 22 24 12 9 70 53 35 30.56 30.22 29.74 10 10 10 35 13 46 T