Weather History for Great Falls, MT

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Month of September, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 93 °F 75 °F 50 °F
Mean Temperature 78 °F 62 °F 44 °F
Min Temperature 64 °F 49 °F 32 °F
Degree Days  
Heating Degree Days (base 65) 21 5 0 164
Cooling Degree Days (base 65) 13 3 0 80
Growing Degree Days (base 50) 27 13 0 379
Dew Point  
Dew Point 63 °F 42 °F 23 °F
Precipitation  
Precipitation 0.36 in 0.04 in 0.00 in 0.84 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 53 mph 10 mph 0 mph
Gust Wind 64 mph 26 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.25 in 29.88 in 29.40 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 28, 2013 Rise Set
Actual Time 7:20 AM MDT 7:10 PM MDT
Civil Twilight 6:50 AM MDT 7:40 PM MDT
Nautical Twilight 6:14 AM MDT 8:16 PM MDT
Astronomical Twilight 5:37 AM MDT 8:53 PM MDT
Moon 12:50 AM MDT (9/28) 3:51 PM MDT (9/28)
Length of Visible Light 12h 50m
Length of Day
11h 49m
Waning Crescent, 35% of the Moon is Illuminated
Sep 28
Waning Crescent
Oct 4
New
Oct 11
First Quarter
Oct 18
Full
Oct 26
Last Quarter

Weather History Calendar

Precipitation Actual month total 0.84 Normal Month Total: 1.42
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Clear
Actual:
93 | 46 0.00
Average:
77 | 47 0.05
Clear
Actual:
92 | 55 0.00
Average:
76 | 46 0.05
Scattered Clouds
Actual:
92 | 57 0.00
Average:
76 | 46 0.06
Scattered Clouds
Actual:
91 | 64 0.00
Average:
75 | 46 0.06
Rain
Actual:
93 | 58 T
Average:
75 | 45 0.05
Rain
Actual:
87 | 54 0.36
Average:
74 | 45 0.06
Rain
Actual:
75 | 57 0.00
Average:
74 | 45 0.05
Fog
Actual:
73 | 50 0.01
Average:
74 | 44 0.05
Partly Cloudy
Actual:
79 | 53 0.01
Average:
73 | 44 0.05
Clear
Actual:
83 | 49 0.00
Average:
73 | 44 0.04
Clear
Actual:
83 | 47 0.00
Average:
72 | 43 0.05
Clear
Actual:
84 | 48 0.00
Average:
72 | 43 0.05
Clear
Actual:
88 | 51 0.00
Average:
71 | 43 0.05
Clear
Actual:
78 | 54 0.00
Average:
71 | 43 0.05
Clear
Actual:
83 | 45 0.00
Average:
70 | 42 0.04
Clear
Actual:
90 | 59 T
Average:
70 | 42 0.05
Scattered Clouds
Actual:
70 | 49 T
Average:
70 | 42 0.05
Rain
Actual:
59 | 41 0.06
Average:
69 | 41 0.04
Scattered Clouds
Actual:
67 | 35 T
Average:
69 | 41 0.05
Clear
Actual:
80 | 45 0.00
Average:
68 | 41 0.04
Scattered Clouds
Actual:
85 | 57 0.00
Average:
68 | 40 0.05
Rain
Actual:
70 | 46 T
Average:
68 | 40 0.04
Clear
Actual:
63 | 45 0.00
Average:
67 | 40 0.05
Rain
Actual:
60 | 46 0.14
Average:
67 | 39 0.04
Rain
Actual:
50 | 41 0.15
Average:
66 | 39 0.04
Rain
Actual:
50 | 37 0.11
Average:
66 | 39 0.04
Scattered Clouds
Actual:
59 | 32 0.00
Average:
66 | 38 0.05
Scattered Clouds
Actual:
61 | 45 0.00
Average:
65 | 38 0.04
Rain
Actual:
62 | 48 T
Average:
65 | 38 0.04
Scattered Clouds
Actual:
58 | 46 0.00
Average:
64 | 38 0.04
 

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 70 46 41 36 29 65 38 10 30.04 29.94 29.84 10 10 10 13 6 16 0.00  
2 92 74 55 40 37 33 46 30 14 29.88 29.82 29.75 10 10 10 23 6 30 0.00  
3 92 75 57 46 42 39 47 33 18 30.03 29.96 29.90 10 10 10 21 9 24 0.00  
4 91 78 64 50 48 46 56 40 23 30.04 30.00 29.95 10 10 10 13 5 21 0.00  
5 93 76 58 62 52 48 78 51 23 30.00 29.95 29.87 10 10 8 43 5 62 T Rain
6 87 71 54 63 57 53 100 67 34 30.02 29.97 29.90 10 10 5 25 7 30 0.36 Rain
7 75 66 57 61 60 56 100 79 58 30.15 30.08 29.99 10 9 5 14 4 16 0.00 Rain
8 73 62 50 61 56 44 100 79 58 30.06 29.99 29.87 10 5 0 26 6 31 0.01 Fog
9 79 66 53 52 48 45 77 54 30 30.01 29.93 29.89 10 10 10 21 12 28 0.01  
10 83 66 49 49 46 39 83 53 22 30.08 30.03 29.99 10 10 10 18 6 30 0.00  
11 83 65 47 49 45 41 86 55 23 30.25 30.20 30.10 10 10 10 20 9 25 0.00  
12 84 66 48 48 45 44 80 53 26 30.25 30.12 29.95 10 10 10 13 6 15 0.00  
13 88 70 51 50 46 41 83 52 21 29.92 29.82 29.73 10 10 10 15 6 18 0.00  
14 78 66 54 49 46 39 77 55 33 30.10 29.99 29.80 10 10 10 20 11 28 0.00  
15 83 64 45 52 46 42 86 58 30 30.14 29.99 29.80 10 10 10 26 7 35 0.00  
16 90 75 59 53 48 41 63 42 21 29.80 29.72 29.63 10 10 10 30 11 41 T  
17 70 60 49 49 45 41 80 60 40 29.77 29.69 29.58 10 10 10 25 8 31 T  
18 59 50 41 46 40 34 93 70 47 30.13 29.79 29.55 10 10 9 24 13 29 0.06 Rain
19 67 51 35 43 38 35 100 66 32 30.22 30.13 30.04 10 10 10 13 6 15 T  
20 80 63 45 36 31 24 65 39 13 30.02 29.84 29.64 10 10 10 20 11 25 0.00  
21 85 71 57 33 27 23 36 24 12 29.63 29.55 29.45 10 10 10 25 13 31 0.00  
22 70 58 46 48 39 32 71 52 32 29.64 29.58 29.53 10 10 10 24 8 30 T Rain
23 63 54 45 38 32 27 65 46 27 29.88 29.78 29.64 10 10 10 37 19 44 0.00  
24 60 53 46 46 39 31 93 67 40 29.88 29.81 29.73 10 10 5 18 9 23 0.14 Rain
25 50 46 41 45 43 39 100 88 76 29.89 29.78 29.72 10 8 0 23 11 30 0.15 Fog , Rain
26 50 44 37 41 36 29 100 73 46 30.09 29.99 29.85 10 9 3 18 10 24 0.11 Rain
27 59 46 32 48 31 26 100 66 31 30.08 29.95 29.84 10 10 1 26 15 36 0.00  
28 61 53 45 39 36 34 65 53 40 29.87 29.78 29.62 10 10 10 30 20 37 0.00  
29 62 55 48 41 34 28 56 45 33 29.66 29.55 29.40 10 10 10 40 22 52 T Rain
30 58 52 46 39 30 24 59 45 30 29.78 29.58 29.42 10 10 10 53 29 64 0.00