Weather History for Great Falls, MT

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Month of May, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 85 °F 66 °F 49 °F
Mean Temperature 67 °F 53 °F 32 °F
Min Temperature 50 °F 39 °F 13 °F
Degree Days  
Heating Degree Days (base 65) 33 12 0 384
Cooling Degree Days (base 65) 2 0 0 3
Growing Degree Days (base 50) 19 4 0 122
Dew Point  
Dew Point 70 °F 37 °F 10 °F
Precipitation  
Precipitation 0.62 in 0.11 in 0.00 in 2.79 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 36 mph 9 mph 0 mph
Gust Wind 48 mph 25 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.66 in 30.02 in 29.57 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

May. 11, 2013 Rise Set
Actual Time 5:53 AM MDT 8:51 PM MDT
Civil Twilight 5:17 AM MDT 9:27 PM MDT
Nautical Twilight 4:31 AM MDT 10:13 PM MDT
Astronomical Twilight 3:35 AM MDT 11:10 PM MDT
Moon 7:01 AM MDT (5/11) 10:36 PM MDT (5/11)
Length of Visible Light 16h 09m
Length of Day
14h 57m
Waxing Crescent, 3% of the Moon is Illuminated
May 11
Waxing Crescent
May 17
First Quarter
May 24
Full
May 31
Last Quarter
Jun 8
New

Weather History Calendar

Precipitation Actual month total 2.79 Normal Month Total: 2.42
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Scattered Clouds
Actual:
51 | 13 0.00
Average:
61 | 34 0.05
Clear
Actual:
67 | 29 0.00
Average:
61 | 34 0.06
Rain
Actual:
49 | 35 0.32
Average:
61 | 35 0.05
Rain
Actual:
58 | 37 0.09
Average:
62 | 35 0.05
Fog
Actual:
68 | 29 0.00
Average:
62 | 35 0.05
Clear
Actual:
73 | 35 0.00
Average:
62 | 36 0.05
Scattered Clouds
Actual:
74 | 38 0.00
Average:
63 | 36 0.06
Clear
Actual:
73 | 31 0.00
Average:
63 | 36 0.06
Scattered Clouds
Actual:
77 | 39 0.00
Average:
63 | 37 0.06
Clear
Actual:
67 | 42 0.00
Average:
63 | 37 0.06
Scattered Clouds
Actual:
80 | 40 T
Average:
64 | 37 0.06
Clear
Actual:
83 | 50 0.00
Average:
64 | 37 0.07
Rain
Actual:
85 | 46 T
Average:
64 | 38 0.07
Clear
Actual:
70 | 40 0.00
Average:
64 | 38 0.07
Scattered Clouds
Actual:
68 | 33 0.00
Average:
65 | 38 0.08
Partly Cloudy
Actual:
68 | 42 T
Average:
65 | 39 0.08
Rain
Actual:
65 | 36 0.10
Average:
65 | 39 0.08
Rain
Actual:
65 | 47 0.03
Average:
65 | 39 0.09
Rain
Actual:
54 | 47 0.21
Average:
66 | 40 0.09
Rain
Actual:
64 | 41 0.24
Average:
66 | 40 0.09
Clear
Actual:
73 | 35 0.00
Average:
66 | 40 0.08
Rain
Actual:
63 | 47 0.03
Average:
66 | 41 0.10
Rain
Actual:
54 | 43 0.22
Average:
67 | 41 0.09
Rain
Actual:
65 | 41 0.01
Average:
67 | 41 0.09
Partly Cloudy
Actual:
68 | 40 T
Average:
67 | 41 0.09
Thunderstorm
Actual:
70 | 33 0.24
Average:
67 | 42 0.10
Rain
Actual:
63 | 43 T
Average:
68 | 42 0.10
Rain
Actual:
63 | 39 0.09
Average:
68 | 42 0.11
Rain
Actual:
63 | 46 0.01
Average:
68 | 42 0.11
Rain
Actual:
55 | 47 0.58
Average:
68 | 43 0.11
Rain
Actual:
51 | 45 0.62
Average:
69 | 43 0.11
 

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
May high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 51 32 13 22 15 10 88 54 20 30.66 30.56 30.44 10 10 10 21 7 29 0.00  
2 67 48 29 22 19 16 63 39 15 30.65 30.45 30.25 10 10 10 24 13 32 0.00  
3 49 42 35 43 39 20 100 72 44 30.34 30.27 30.20 10 7 1 22 11 26 0.32 Rain
4 58 48 37 41 38 36 100 76 51 30.39 30.33 30.28 10 10 5 22 6 24 0.09 Rain
5 68 49 29 38 33 28 100 64 28 30.27 30.15 30.00 10 9 0 12 3 15 0.00 Fog
6 73 54 35 38 34 30 85 54 23 30.03 29.94 29.82 10 10 10 12 5 21 0.00  
7 74 56 38 38 35 31 70 48 25 30.08 29.91 29.80 10 10 8 33 15 40 0.00  
8 73 52 31 39 34 28 92 59 26 30.18 30.11 30.04 10 10 10 15 6 17 0.00  
9 77 58 39 41 39 36 82 53 23 30.14 30.07 30.03 10 10 10 17 7 23 0.00  
10 67 55 42 41 31 22 82 51 20 30.43 30.30 30.06 10 10 10 36 12 43 0.00  
11 80 60 40 43 35 25 62 41 19 30.35 30.16 30.00 10 10 10 25 8 31 T  
12 83 67 50 46 40 35 63 42 20 30.02 29.92 29.80 10 10 10 26 13 35 0.00  
13 85 66 46 49 43 39 68 44 20 29.89 29.79 29.57 10 10 10 36 19 48 T Rain
14 70 55 40 35 27 17 56 37 17 30.01 29.91 29.82 10 10 10 29 14 43 0.00  
15 68 51 33 30 24 21 64 41 18 30.05 29.97 29.88 10 10 10 13 5 16 0.00  
16 68 55 42 42 34 30 83 56 28 29.86 29.83 29.78 10 10 10 17 7 25 T  
17 65 51 36 50 42 34 93 65 36 29.94 29.90 29.84 10 10 6 16 7 21 0.10 Rain
18 65 56 47 46 45 41 93 68 43 30.00 29.95 29.89 10 10 10 18 6 23 0.03 Rain
19 54 51 47 48 47 45 93 88 83 30.19 30.10 30.00 10 9 4 15 9 18 0.21 Rain
20 64 53 41 48 47 42 100 78 56 30.23 30.18 30.12 10 9 2 22 6 25 0.24 Rain
21 73 54 35 45 36 27 93 57 20 30.13 29.94 29.77 10 10 8 28 12 35 0.00  
22 63 55 47 46 40 38 76 61 46 29.85 29.79 29.75 10 10 9 31 19 37 0.03 Rain
23 54 49 43 46 43 39 93 76 59 29.98 29.90 29.80 10 9 2 18 6 24 0.22 Rain
24 65 53 41 43 37 28 96 61 26 29.97 29.89 29.84 10 10 10 36 15 44 0.01 Rain
25 68 54 40 42 35 29 77 55 32 29.98 29.93 29.88 10 10 10 22 8 30 T  
26 70 52 33 50 40 30 93 64 35 30.01 29.93 29.85 10 10 4 23 5 30 0.24 Rain , Thunderstorm
27 63 53 43 48 45 42 93 72 51 29.90 29.85 29.78 10 10 5 18 8 22 T Rain
28 63 51 39 48 44 39 100 74 48 29.78 29.74 29.72 10 9 2 18 6 22 0.09 Rain
29 63 55 46 70 48 43 93 77 60 30.07 29.72 29.67 10 10 10 15 5 17 0.01 Rain
30 55 51 47 48 45 44 93 82 71 29.99 29.85 29.70 10 8 5 20 8 25 0.58 Rain
31 51 48 45 46 44 42 93 84 74 30.32 30.13 29.98 10 8 3 23 11 30 0.62 Rain