Weather History for Helena, MT

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Month of October, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 85 °F 58 °F 44 °F
Mean Temperature 66 °F 47 °F 34 °F
Min Temperature 49 °F 36 °F 19 °F
Degree Days  
Heating Degree Days (base 65) 31 18 0 545
Cooling Degree Days (base 65) 1 0 0 1
Growing Degree Days (base 50) 15 2 0 65
Dew Point  
Dew Point 52 °F 33 °F 8 °F
Precipitation  
Precipitation 0.17 in 0.02 in 0.00 in 0.55 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 36 mph 6 mph 0 mph
Gust Wind 52 mph 24 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.57 in 30.05 in 29.46 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Oct. 12, 2011 Rise Set
Actual Time 7:41 AM MDT 6:46 PM MDT
Civil Twilight 7:10 AM MDT 7:17 PM MDT
Nautical Twilight 6:35 AM MDT 7:52 PM MDT
Astronomical Twilight 6:00 AM MDT 8:27 PM MDT
Moon 6:43 PM MDT (10/12) 8:25 AM MDT (10/12)
Length of Visible Light 12h 06m
Length of Day
11h 05m
Full, 100% of the Moon is Illuminated
Oct 12
Full
Oct 19
Last Quarter
Oct 26
New
Nov 2
First Quarter
Nov 10
Full

Weather History Calendar

Precipitation Actual month total 0.55 Normal Month Total: 0.68
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Thunderstorm
Actual:
84 | 47 T
Average:
66 | 38 0.03
Scattered Clouds
Actual:
75 | 43 0.00
Average:
65 | 37 0.03
Clear
Actual:
85 | 42 0.00
Average:
65 | 37 0.03
Rain
Actual:
75 | 49 0.17
Average:
64 | 36 0.02
Rain
Actual:
62 | 47 0.03
Average:
64 | 36 0.03
Rain
Actual:
52 | 44 0.03
Average:
63 | 36 0.02
Rain
Actual:
49 | 44 0.10
Average:
63 | 35 0.03
Partly Cloudy
Actual:
55 | 35 0.00
Average:
62 | 35 0.02
Clear
Actual:
62 | 31 0.00
Average:
62 | 35 0.03
Partly Cloudy
Actual:
62 | 34 0.00
Average:
62 | 34 0.02
Partly Cloudy
Actual:
61 | 45 0.00
Average:
61 | 34 0.03
Partly Cloudy
Actual:
59 | 41 0.00
Average:
61 | 34 0.02
Partly Cloudy
Actual:
58 | 39 0.00
Average:
60 | 33 0.02
Partly Cloudy
Actual:
53 | 38 0.01
Average:
60 | 33 0.02
Rain
Actual:
48 | 36 0.12
Average:
59 | 33 0.03
Rain
Actual:
48 | 34 0.05
Average:
59 | 32 0.02
Scattered Clouds
Actual:
56 | 31 0.00
Average:
58 | 32 0.02
Clear
Actual:
58 | 28 0.00
Average:
58 | 32 0.02
Scattered Clouds
Actual:
51 | 27 0.00
Average:
57 | 32 0.02
Scattered Clouds
Actual:
64 | 31 0.00
Average:
57 | 31 0.02
Rain
Actual:
56 | 43 0.02
Average:
57 | 31 0.02
Partly Cloudy
Actual:
64 | 44 T
Average:
56 | 31 0.02
Rain
Actual:
63 | 41 T
Average:
56 | 30 0.02
Rain
Actual:
52 | 32 0.01
Average:
55 | 30 0.02
Partly Cloudy
Actual:
44 | 29 0.01
Average:
55 | 30 0.02
Scattered Clouds
Actual:
49 | 19 0.00
Average:
54 | 29 0.02
Partly Cloudy
Actual:
49 | 32 0.00
Average:
54 | 29 0.02
Scattered Clouds
Actual:
46 | 23 0.00
Average:
53 | 29 0.01
Rain
Actual:
51 | 33 T
Average:
53 | 28 0.02
Scattered Clouds
Actual:
61 | 28 0.00
Average:
52 | 28 0.02
Partly Cloudy
Actual:
54 | 32 0.00
Average:
52 | 28 0.01
 

Calendar Legend

Sunny
Clear
Mostly Cloudy
Partly Sunny
Partly Cloudy
Mostly Sunny
Cloudy Rain Snow
Hail
Flurries
Thunderstorms Hazy
Fog
Sleet '?' denotes
'chance of'
Unknown

Daily Weather History & Observations

2011 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  
1 84 66 47 48 39 35 72 47 22 29.97 29.92 29.81 10 10 5 35 4 52 T Rain , Thunderstorm
2 75 59 43 46 43 39 86 60 33 30.04 29.96 29.90 10 10 10 13 3 16 0.00  
3 85 64 42 40 37 31 82 49 15 30.06 29.91 29.73 10 10 10 24 7 43 0.00  
4 75 62 49 49 43 37 93 62 31 29.74 29.67 29.56 10 10 8 26 11 37 0.17 Rain
5 62 55 47 52 49 46 100 84 67 29.69 29.56 29.46 10 10 9 14 3 17 0.03 Rain
6 52 48 44 49 43 39 93 81 68 29.76 29.62 29.46 10 10 5 18 8 21 0.03 Rain
7 49 47 44 44 39 36 100 81 61 30.10 29.84 29.68 10 10 5 26 11 36 0.10 Rain
8 55 45 35 41 38 33 96 73 50 30.33 30.24 30.12 10 10 10 8 2 31 0.00  
9 62 47 31 37 32 26 92 59 25 30.25 30.10 29.96 10 10 10 15 4 23 0.00  
10 62 48 34 39 35 30 96 66 36 29.94 29.82 29.71 10 10 10 18 3 25 0.00  
11 61 53 45 39 35 29 83 61 39 30.01 29.80 29.69 10 10 10 33 11 45 0.00  
12 59 50 41 33 29 25 62 46 30 30.17 30.10 30.03 10 10 10 24 11 33 0.00  
13 58 49 39 32 29 25 70 50 30 30.17 30.12 30.03 10 10 10 18 8 23 0.00  
14 53 46 38 39 36 29 92 73 53 30.16 30.06 29.92 10 10 10 6 1 8 0.01  
15 48 42 36 41 39 36 100 86 71 30.19 30.04 29.88 10 9 5 10 3 13 0.12 Rain
16 48 41 34 44 37 32 100 81 62 30.22 30.10 29.98 10 9 4 17 4 22 0.05 Rain
17 56 44 31 34 27 18 89 57 24 30.45 30.37 30.18 10 10 10 18 7 24 0.00  
18 58 43 28 31 29 27 85 59 33 30.57 30.42 30.29 10 10 10 12 3 14 0.00  
19 51 39 27 36 31 26 89 68 46 30.25 30.10 30.01 10 10 8 8 1 10 0.00  
20 64 48 31 38 35 30 92 64 36 30.15 30.08 30.00 10 10 10 14 3 17 0.00  
21 56 50 43 43 39 37 96 75 54 30.21 30.17 30.12 10 10 7 17 5 21 0.02 Rain
22 64 54 44 40 35 29 63 46 29 30.22 30.12 30.01 10 10 10 36 11 48 T  
23 63 52 41 42 37 34 71 55 39 30.12 30.06 30.02 10 10 10 22 8 30 T Rain
24 52 42 32 42 31 21 92 62 32 30.23 30.04 29.96 10 10 9 23 8 29 0.01 Rain
25 44 37 29 29 23 19 75 57 39 30.47 30.35 30.15 10 10 9 16 5 20 0.01  
26 49 34 19 25 17 8 92 54 21 30.49 30.31 30.14 10 10 8 18 4 24 0.00  
27 49 41 32 22 17 12 51 46 40 30.30 30.19 30.04 10 10 10 25 9 32 0.00  
28 46 35 23 22 20 18 81 59 37 30.38 30.22 29.96 10 10 10 9 1 9 0.00  
29 51 42 33 34 24 19 65 48 31 30.25 30.08 29.83 10 10 10 36 13 47 T Rain
30 61 45 28 33 27 23 72 51 30 30.31 30.16 29.98 10 10 10 12 4 16 0.00  
31 54 43 32 37 27 15 71 51 31 30.21 30.02 29.89 10 10 10 26 10 36 0.00