Weather History for Helena, MT

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Month of September, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 93 °F 74 °F 47 °F
Mean Temperature 75 °F 62 °F 42 °F
Min Temperature 62 °F 49 °F 28 °F
Degree Days  
Heating Degree Days (base 65) 23 6 0 172
Cooling Degree Days (base 65) 10 3 0 80
Growing Degree Days (base 50) 24 13 0 376
Dew Point  
Dew Point 63 °F 42 °F 21 °F
Precipitation  
Precipitation 0.63 in 0.05 in 0.00 in 1.46 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 32 mph 6 mph 0 mph
Gust Wind 45 mph 24 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.26 in 29.94 in 29.52 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 07, 2013 Rise Set
Actual Time 6:55 AM MDT 7:54 PM MDT
Civil Twilight 6:25 AM MDT 8:25 PM MDT
Nautical Twilight 5:48 AM MDT 9:02 PM MDT
Astronomical Twilight 5:09 AM MDT 9:40 PM MDT
Moon 9:25 AM MDT (9/7) 8:42 PM MDT (9/7)
Length of Visible Light 14h 00m
Length of Day
12h 58m
Waxing Crescent, 5% of the Moon is Illuminated
Sep 7
Waxing Crescent
Sep 12
First Quarter
Sep 19
Full
Sep 26
Last Quarter
Oct 4
New

Weather History Calendar

Precipitation Actual month total 1.46 Normal Month Total: 1.10
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Clear
Actual:
93 | 51 0.00
Average:
79 | 48 0.04
Clear
Actual:
84 | 52 0.00
Average:
79 | 48 0.04
Scattered Clouds
Actual:
90 | 59 T
Average:
78 | 47 0.04
Scattered Clouds
Actual:
88 | 61 0.00
Average:
78 | 47 0.05
Thunderstorm
Actual:
86 | 58 0.02
Average:
77 | 47 0.04
Thunderstorm
Actual:
85 | 58 0.09
Average:
77 | 46 0.04
Thunderstorm
Actual:
81 | 62 0.01
Average:
76 | 46 0.04
Thunderstorm
Actual:
75 | 57 0.04
Average:
76 | 46 0.04
Partly Cloudy
Actual:
77 | 54 T
Average:
76 | 45 0.04
Clear
Actual:
83 | 47 0.00
Average:
75 | 45 0.04
Clear
Actual:
85 | 49 0.00
Average:
75 | 45 0.03
Clear
Actual:
87 | 54 0.00
Average:
74 | 44 0.04
Scattered Clouds
Actual:
87 | 56 0.00
Average:
74 | 44 0.04
Scattered Clouds
Actual:
78 | 60 0.00
Average:
73 | 44 0.04
Clear
Actual:
84 | 51 0.00
Average:
73 | 43 0.04
Thunderstorm
Actual:
87 | 53 0.00
Average:
72 | 43 0.03
Rain
Actual:
63 | 50 0.19
Average:
72 | 43 0.04
Partly Cloudy
Actual:
65 | 48 0.00
Average:
72 | 42 0.03
Partly Cloudy
Actual:
68 | 43 0.00
Average:
71 | 42 0.04
Clear
Actual:
79 | 37 0.00
Average:
71 | 42 0.03
Clear
Actual:
82 | 41 0.00
Average:
70 | 41 0.04
Rain
Actual:
70 | 47 0.03
Average:
70 | 41 0.03
Scattered Clouds
Actual:
64 | 42 0.00
Average:
69 | 41 0.04
Rain
Actual:
53 | 41 0.63
Average:
69 | 40 0.03
Rain
Actual:
51 | 40 0.32
Average:
68 | 40 0.04
Rain
Actual:
47 | 39 0.03
Average:
68 | 39 0.03
Partly Cloudy
Actual:
55 | 28 0.00
Average:
67 | 39 0.03
Partly Cloudy
Actual:
63 | 43 0.00
Average:
67 | 39 0.03
Rain
Actual:
64 | 46 T
Average:
67 | 38 0.03
Rain
Actual:
58 | 42 0.10
Average:
66 | 38 0.03
 

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

2013 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 93 72 51 43 37 33 50 32 13 30.09 29.98 29.86 10 10 10 17 4 20 0.00  
2 84 68 52 52 41 37 63 43 22 29.95 29.90 29.86 10 10 10 16 3 21 0.00  
3 90 75 59 57 45 39 73 47 20 30.13 30.04 29.96 10 10 10 24 3 31 T  
4 88 75 61 57 53 49 78 54 29 30.15 30.08 30.01 10 10 10 15 4 18 0.00  
5 86 72 58 63 53 48 78 56 34 30.07 30.02 29.95 10 10 8 30 4 37 0.02 Rain , Thunderstorm
6 85 72 58 61 57 52 93 65 36 30.06 30.01 29.92 10 10 10 26 5 30 0.09 Rain , Thunderstorm
7 81 72 62 61 57 55 84 63 42 30.14 30.06 29.96 10 10 10 16 6 18 0.01 Rain , Thunderstorm
8 75 66 57 57 51 41 87 63 38 30.06 29.98 29.91 10 10 9 28 7 36 0.04 Rain , Thunderstorm
9 77 66 54 49 45 41 67 48 29 30.06 29.99 29.95 10 10 8 20 8 24 T  
10 83 65 47 48 43 39 86 54 22 30.16 30.09 30.03 10 10 10 9 2 15 0.00  
11 85 67 49 46 43 40 71 48 24 30.26 30.20 30.13 10 10 10 17 5 20 0.00  
12 87 71 54 45 43 39 66 43 20 30.26 30.13 29.99 10 10 10 12 3 14 0.00  
13 87 72 56 47 45 41 67 45 22 29.98 29.87 29.76 10 10 10 13 5 15 0.00  
14 78 69 60 47 46 44 56 46 35 30.09 29.99 29.83 10 10 10 22 9 28 0.00  
15 84 68 51 48 45 42 71 50 28 30.12 30.00 29.87 10 10 10 21 5 24 0.00  
16 87 70 53 51 46 40 72 47 22 29.89 29.80 29.69 10 10 10 24 7 35 0.00 Thunderstorm
17 63 57 50 54 48 42 93 69 44 29.83 29.76 29.67 10 9 5 16 4 21 0.19 Rain
18 65 57 48 49 39 32 93 64 34 30.08 29.86 29.68 10 10 10 26 10 32 0.00  
19 68 56 43 39 35 29 83 55 26 30.21 30.14 30.09 10 10 10 16 5 20 0.00  
20 79 58 37 37 33 21 79 46 12 30.09 29.94 29.75 10 10 10 18 2 29 0.00  
21 82 62 41 36 32 28 58 37 15 29.75 29.66 29.52 10 10 10 16 4 20 0.00  
22 70 59 47 46 39 33 77 55 32 29.74 29.65 29.59 10 10 7 22 7 28 0.03 Rain
23 64 53 42 40 34 26 83 54 25 29.97 29.89 29.74 10 10 10 30 8 37 0.00  
24 53 47 41 45 37 32 93 71 48 29.96 29.89 29.82 10 9 3 10 3 14 0.63 Rain
25 51 46 40 42 39 36 93 85 76 29.85 29.78 29.71 10 10 6 21 8 24 0.32 Rain
26 47 43 39 37 34 31 86 73 60 30.11 30.01 29.83 10 10 4 17 9 21 0.03 Rain
27 55 42 28 33 30 27 92 67 41 30.13 30.04 29.97 10 10 2 20 6 25 0.00  
28 63 53 43 39 35 31 70 53 36 29.96 29.88 29.73 10 10 10 22 7 29 0.00  
29 64 55 46 39 33 28 61 48 34 29.76 29.69 29.52 10 10 7 32 10 40 T Rain
30 58 50 42 43 31 22 71 48 24 29.97 29.73 29.54 10 10 2 31 12 45 0.10 Rain