Weather History for Butte, MT

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Month of September, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 83 °F 74 °F 61 °F
Mean Temperature 67 °F 56 °F 46 °F
Min Temperature 53 °F 37 °F 29 °F
Degree Days  
Heating Degree Days (base 65) 19 9 0 273
Cooling Degree Days (base 65) 2 0 0 2
Growing Degree Days (base 50) 12 5 0 164
Dew Point  
Dew Point 49 °F 30 °F 8 °F
Precipitation  
Precipitation 0.34 in 0.01 in 0.00 in 0.40 in
Snowdepth - - - -
Wind  
Wind 29 mph 5 mph 0 mph
Gust Wind 39 mph 21 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.45 in 30.10 in 29.71 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 06, 2011 Rise Set
Actual Time 6:56 AM MDT 7:59 PM MDT
Civil Twilight 6:26 AM MDT 8:29 PM MDT
Nautical Twilight 5:49 AM MDT 9:06 PM MDT
Astronomical Twilight 5:10 AM MDT 9:44 PM MDT
Moon 4:51 PM MDT (9/6) 1:00 AM MDT (9/6)
Length of Visible Light 14h 03m
Length of Day
13h 02m
Waxing Gibbous, 71% of the Moon is Illuminated
Sep 6
Waxing Gibbous
Sep 12
Full
Sep 20
Last Quarter
Sep 27
New
Oct 3
First Quarter

Weather History Calendar

Precipitation Actual month total 0.40 Normal Month Total: 1.00
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
64 | 36 0.00
Average:
75 | 40 0.04
Clear
Actual:
68 | 34 0.00
Average:
74 | 40 0.04
Clear
Actual:
69 | 29 0.00
Average:
74 | 40 0.04
Clear
Actual:
81 | 31 0.00
Average:
73 | 39 0.04
Clear
Actual:
83 | 34 0.00
Average:
73 | 39 0.04
Clear
Actual:
80 | 35 0.00
Average:
73 | 39 0.04
Clear
Actual:
80 | 53 0.00
Average:
72 | 38 0.03
Scattered Clouds
Actual:
76 | 44 0.00
Average:
72 | 38 0.04
Scattered Clouds
Actual:
81 | 42 0.00
Average:
71 | 38 0.03
Clear
Actual:
80 | 38 0.00
Average:
71 | 38 0.04
Rain
Actual:
81 | 38 T
Average:
70 | 37 0.03
Clear
Actual:
81 | 37 0.00
Average:
70 | 37 0.03
Scattered Clouds
Actual:
78 | 38 0.00
Average:
70 | 37 0.04
Clear
Actual:
70 | 40 0.00
Average:
69 | 36 0.03
Rain
Actual:
74 | 35 0.04
Average:
69 | 36 0.03
Rain
Actual:
61 | 41 0.34
Average:
68 | 36 0.03
Partly Cloudy
Actual:
61 | 35 0.00
Average:
68 | 35 0.03
Partly Cloudy
Actual:
64 | 43 0.00
Average:
67 | 35 0.03
Partly Cloudy
Actual:
65 | 35 0.02
Average:
67 | 34 0.04
Scattered Clouds
Actual:
63 | 29 0.00
Average:
66 | 34 0.03
Clear
Actual:
74 | 41 0.00
Average:
66 | 34 0.03
Clear
Actual:
80 | 32 0.00
Average:
65 | 33 0.03
Clear
Actual:
83 | 37 0.00
Average:
65 | 33 0.03
Clear
Actual:
81 | 35 0.00
Average:
64 | 33 0.03
Scattered Clouds
Actual:
83 | 38 T
Average:
64 | 32 0.03
Rain
Actual:
74 | 44 T
Average:
64 | 32 0.03
Clear
Actual:
79 | 39 0.00
Average:
63 | 32 0.03
Clear
Actual:
67 | 36 0.00
Average:
63 | 32 0.03
Clear
Actual:
72 | 30 0.00
Average:
62 | 31 0.03
Clear
Actual:
81 | 34 0.00
Average:
62 | 31 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

2011 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 64 50 36 41 34 25 83 53 23 30.09 30.01 29.86 10 10 10 18 5 28 0.00  
2 68 51 34 29 25 20 75 46 16 30.20 30.05 29.98 10 10 10 24 9 32 0.00  
3 69 49 29 29 24 18 78 47 16 30.33 30.25 30.20 10 10 10 14 4 20 0.00  
4 81 56 31 27 22 8 64 35 6 30.22 30.10 29.99 10 10 10 13 3 22 0.00  
5 83 59 34 29 24 12 64 36 8 30.06 30.00 29.92 10 10 8 16 4 21 0.00  
6 80 58 35 29 22 11 64 36 7 30.25 30.17 30.05 10 10 8 14 4 20 0.00  
7 80 67 53 30 23 18 52 31 10 30.45 30.35 30.27 10 10 10 13 5 18 0.00  
8 76 60 44 41 35 31 65 43 21 30.31 30.26 30.22 10 10 10 16 4 21 0.00  
9 81 62 42 39 32 24 70 42 13 30.30 30.20 30.11 10 10 10 20 4 28 0.00  
10 80 59 38 33 27 19 64 39 13 30.20 30.11 30.03 10 10 10 15 5 23 0.00  
11 81 60 38 36 30 25 70 42 14 30.09 30.03 29.95 10 9 2 15 4 21 T Rain
12 81 59 37 38 33 29 82 49 16 30.19 30.09 30.01 10 8 6 14 5 20 0.00  
13 78 58 38 38 33 30 70 45 19 30.26 30.12 30.04 10 9 6 16 4 22 0.00  
14 70 55 40 38 37 34 76 52 28 30.24 30.08 29.99 10 10 9 18 5 23 0.00  
15 74 55 35 48 37 31 85 53 20 30.07 29.90 29.77 10 10 10 29 4 39 0.04 Rain
16 61 51 41 49 44 37 93 69 44 29.98 29.88 29.80 10 9 2 13 3 17 0.34 Rain
17 61 48 35 39 32 25 92 59 25 30.08 29.99 29.91 10 10 10 22 6 30 0.00  
18 64 54 43 38 34 29 76 56 36 30.23 30.13 30.06 10 10 10 16 6 23 0.00  
19 65 50 35 42 36 32 89 60 31 30.22 30.10 29.99 10 10 10 28 9 38 0.02  
20 63 46 29 34 28 18 92 56 19 30.32 30.24 30.18 10 10 10 14 3 17 0.00  
21 74 58 41 33 27 23 85 51 16 30.27 30.21 30.17 10 10 10 13 5 - 0.00  
22 80 56 32 34 29 24 82 48 13 30.25 30.16 30.09 10 10 10 15 3 20 0.00  
23 83 60 37 34 30 25 76 45 13 30.31 30.19 30.07 10 10 10 15 4 23 0.00  
24 81 58 35 32 27 22 75 43 11 30.25 30.06 29.90 10 10 10 14 3 21 0.00  
25 83 61 38 37 29 23 70 41 12 30.01 29.83 29.71 10 10 10 22 5 29 T  
26 74 59 44 43 34 24 76 46 16 30.15 29.98 29.79 10 10 10 15 6 22 T Rain
27 79 59 39 36 32 30 70 44 17 30.15 30.03 29.95 10 10 10 21 5 26 0.00  
28 67 52 36 42 33 23 85 55 24 30.34 30.18 30.01 10 10 10 15 6 20 0.00  
29 72 51 30 28 25 22 72 46 19 30.40 30.25 30.12 10 10 10 16 5 18 0.00  
30 81 58 34 32 28 26 75 45 14 30.14 30.06 29.94 10 10 10 23 4 32 0.00