Weather History for Helena, MT

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Month of October, 2010

  Max Avg Min Sum
Temperature  
Max Temperature 82 °F 63 °F 42 °F
Mean Temperature 63 °F 50 °F 38 °F
Min Temperature 48 °F 36 °F 25 °F
Degree Days  
Heating Degree Days (base 65) 27 15 2 476
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 14 3 0 82
Dew Point  
Dew Point 51 °F 32 °F 6 °F
Precipitation  
Precipitation 0.27 in 0.02 in 0.00 in 0.46 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 31 mph 5 mph 0 mph
Gust Wind 41 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.55 in 30.09 in 29.35 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Oct. 08, 2010 Rise Set
Actual Time 7:36 AM MDT 6:54 PM MDT
Civil Twilight 7:05 AM MDT 7:24 PM MDT
Nautical Twilight 6:30 AM MDT 7:59 PM MDT
Astronomical Twilight 5:55 AM MDT 8:34 PM MDT
Moon 8:56 AM MDT (10/8) 6:59 PM MDT (10/8)
Length of Visible Light 12h 18m
Length of Day
11h 18m
New Moon, 1% of the Moon is Illuminated
Oct 8
New Moon
Oct 14
First Quarter
Oct 22
Full
Oct 30
Last Quarter
Nov 5
New

Weather History Calendar

Precipitation Actual month total 0.46 Normal Month Total: 0.66
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Clear
Actual:
76 | 48 0.00
Average:
65 | 36 0.03
Clear
Actual:
82 | 42 0.00
Average:
65 | 36 0.03
Clear
Actual:
81 | 43 0.00
Average:
64 | 35 0.03
Rain
Actual:
78 | 47 0.01
Average:
64 | 35 0.03
Rain
Actual:
57 | 40 0.27
Average:
64 | 35 0.02
Fog
Actual:
66 | 37 0.00
Average:
63 | 35 0.02
Fog
Actual:
74 | 43 0.00
Average:
63 | 34 0.02
Partly Cloudy
Actual:
63 | 48 0.00
Average:
63 | 34 0.02
Scattered Clouds
Actual:
69 | 44 0.00
Average:
62 | 34 0.02
Scattered Clouds
Actual:
69 | 42 0.00
Average:
62 | 33 0.02
Rain
Actual:
58 | 40 0.08
Average:
61 | 33 0.02
Clear
Actual:
60 | 29 0.00
Average:
61 | 33 0.02
Clear
Actual:
66 | 30 0.00
Average:
60 | 32 0.02
Clear
Actual:
74 | 31 0.00
Average:
60 | 32 0.02
Clear
Actual:
67 | 35 0.00
Average:
59 | 32 0.02
Scattered Clouds
Actual:
53 | 31 0.00
Average:
59 | 31 0.02
Clear
Actual:
62 | 33 0.00
Average:
58 | 31 0.02
Clear
Actual:
60 | 27 0.00
Average:
58 | 31 0.02
Clear
Actual:
64 | 39 0.00
Average:
57 | 30 0.02
Clear
Actual:
67 | 33 0.00
Average:
57 | 30 0.02
Clear
Actual:
67 | 32 0.00
Average:
56 | 30 0.02
Clear
Actual:
65 | 31 0.00
Average:
56 | 29 0.02
Rain
Actual:
57 | 39 0.02
Average:
55 | 29 0.02
Rain
Actual:
56 | 37 0.08
Average:
54 | 28 0.02
Partly Cloudy
Actual:
46 | 37 T
Average:
54 | 28 0.02
Overcast
Actual:
42 | 37 0.00
Average:
53 | 28 0.02
Partly Cloudy
Actual:
49 | 27 0.00
Average:
53 | 27 0.02
Scattered Clouds
Actual:
56 | 25 0.00
Average:
52 | 27 0.02
Partly Cloudy
Actual:
59 | 28 0.00
Average:
51 | 27 0.02
Fog
Actual:
52 | 27 0.00
Average:
51 | 26 0.02
Scattered Clouds
Actual:
52 | 30 T
Average:
50 | 26 0.02
 

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

2010 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 76 62 48 46 41 36 66 50 33 30.32 30.24 30.16 10 10 10 10 5 12 0.00  
2 82 62 42 45 43 40 83 53 22 30.21 30.11 29.99 10 10 10 9 2 10 0.00  
3 81 62 43 42 39 36 71 48 25 30.03 29.92 29.79 10 10 10 15 3 18 0.00  
4 78 63 47 51 43 38 76 51 26 29.94 29.85 29.76 10 10 10 26 8 36 0.01 Rain
5 57 49 40 50 46 39 93 80 66 30.46 30.27 29.95 10 9 2 18 7 24 0.27 Rain
6 66 52 37 50 42 36 100 76 52 30.47 30.31 30.09 10 6 0 9 1 10 0.00 Fog
7 74 59 43 49 40 27 100 60 20 30.06 30.00 29.90 10 7 0 20 7 26 0.00 Fog
8 63 56 48 41 40 39 64 54 43 30.17 30.07 29.95 10 10 10 22 10 26 0.00  
9 69 57 44 42 39 36 83 58 32 30.30 30.24 30.17 10 10 10 20 6 24 0.00  
10 69 56 42 48 43 37 77 61 44 30.25 30.15 30.00 10 10 10 17 4 24 0.00  
11 58 49 40 45 33 21 80 54 27 30.45 30.21 30.00 10 10 7 30 12 37 0.08 Rain
12 60 45 29 25 21 14 78 48 18 30.55 30.48 30.42 10 10 10 17 6 22 0.00  
13 66 48 30 29 24 21 78 48 18 30.51 30.41 30.32 10 10 10 10 2 13 0.00  
14 74 53 31 32 28 25 72 46 19 30.35 30.20 30.03 10 10 10 12 1 13 0.00  
15 67 51 35 34 26 20 75 49 22 30.27 30.08 29.99 10 10 10 23 7 30 0.00  
16 53 42 31 32 25 20 63 51 38 30.30 30.20 30.10 10 10 10 13 3 15 0.00  
17 62 48 33 35 25 14 85 51 16 30.22 30.16 30.10 10 10 10 17 5 21 0.00  
18 60 44 27 26 17 6 69 41 12 30.31 30.22 30.13 10 10 10 23 6 29 0.00  
19 64 52 39 30 25 19 58 43 27 30.23 30.16 30.11 10 10 10 22 7 29 0.00  
20 67 50 33 33 30 28 82 53 24 30.22 30.14 30.04 10 10 10 9 1 10 0.00  
21 67 50 32 33 29 26 78 52 26 30.08 29.99 29.88 10 10 10 9 1 - 0.00  
22 65 48 31 35 31 27 75 53 31 30.00 29.89 29.82 10 10 10 8 1 9 0.00  
23 57 48 39 42 35 31 79 61 43 29.87 29.83 29.80 10 10 7 10 2 15 0.02 Rain
24 56 47 37 44 36 31 86 66 46 29.81 29.52 29.35 10 10 5 23 7 30 0.08 Rain
25 46 42 37 31 27 25 76 61 45 29.74 29.59 29.39 10 10 10 31 14 41 T  
26 42 40 37 28 24 20 64 54 44 29.99 29.81 29.71 10 10 10 25 15 35 0.00  
27 49 38 27 25 22 18 69 49 29 30.39 30.23 30.01 10 10 10 23 11 33 0.00  
28 56 41 25 25 22 20 81 54 26 30.39 30.27 30.06 10 10 10 8 2 10 0.00  
29 59 44 28 35 26 21 75 50 25 30.13 30.06 29.95 10 10 10 24 4 28 0.00  
30 52 40 27 35 31 25 92 71 50 30.09 29.99 29.89 10 8 0 9 2 10 0.00 Fog
31 52 41 30 36 31 27 89 71 52 30.33 30.11 29.90 10 10 9 20 3 25 T