Weather History for Helena, MT

Change the Weather History Date:

Month of May, 2014

  Max Avg Min Sum
Temperature  
Max Temperature 85 °F 69 °F 43 °F
Mean Temperature 67 °F 55 °F 38 °F
Min Temperature 54 °F 41 °F 26 °F
Degree Days  
Heating Degree Days (base 65) 27 10 0 312
Cooling Degree Days (base 65) 2 0 0 4
Growing Degree Days (base 50) 16 6 0 193
Dew Point  
Dew Point 52 °F 34 °F 12 °F
Precipitation  
Precipitation 0.12 in 0.01 in 0.00 in 0.28 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 33 mph 7 mph 0 mph
Gust Wind 45 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.57 in 30.01 in 29.67 in

Monthly Weather History Graph

Monthly Weather History Graph

Search for Another Location

Airport:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

May. 10, 2014 Rise Set
Actual Time 6:00 AM MDT 8:49 PM MDT
Civil Twilight 5:25 AM MDT 9:24 PM MDT
Nautical Twilight 4:40 AM MDT 10:09 PM MDT
Astronomical Twilight 3:48 AM MDT 11:02 PM MDT
Moon 4:34 PM MDT (5/10) 3:51 AM MDT (5/10)
Length of Visible Light 15h 59m
Length of Day
14h 49m
Waxing Gibbous, 82% of the Moon is Illuminated
May 10
Waxing Gibbous
May 14
Full
May 21
Last Quarter
May 28
New
Jun 5
First Quarter

Weather History Calendar

Precipitation Actual month total 0.28 Normal Month Total: 1.87
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Clear
Actual:
77 | 37 0.00
Average:
63 | 36 0.04
Scattered Clouds
Actual:
76 | 46 0.00
Average:
63 | 37 0.04
Partly Cloudy
Actual:
54 | 39 0.00
Average:
63 | 37 0.04
Rain
Actual:
62 | 39 0.12
Average:
64 | 37 0.04
Partly Cloudy
Actual:
63 | 37 0.00
Average:
64 | 37 0.04
Partly Cloudy
Actual:
54 | 36 0.00
Average:
64 | 38 0.04
Partly Cloudy
Actual:
54 | 32 T
Average:
65 | 38 0.05
Scattered Clouds
Actual:
63 | 28 0.00
Average:
65 | 38 0.05
Rain
Actual:
62 | 39 0.02
Average:
65 | 39 0.05
Partly Cloudy
Actual:
56 | 33 0.00
Average:
66 | 39 0.06
Snow
Actual:
43 | 33 T
Average:
66 | 39 0.05
Clear
Actual:
59 | 26 0.00
Average:
66 | 40 0.05
Scattered Clouds
Actual:
67 | 31 0.00
Average:
66 | 40 0.06
Partly Cloudy
Actual:
69 | 36 0.00
Average:
67 | 40 0.06
Scattered Clouds
Actual:
77 | 42 0.00
Average:
67 | 41 0.06
Rain
Actual:
63 | 46 0.02
Average:
67 | 41 0.06
Thunderstorm
Actual:
73 | 42 0.01
Average:
68 | 41 0.07
Rain
Actual:
60 | 43 0.07
Average:
68 | 42 0.06
Partly Cloudy
Actual:
66 | 45 0.00
Average:
68 | 42 0.06
Clear
Actual:
72 | 38 0.00
Average:
68 | 42 0.07
Clear
Actual:
79 | 40 0.00
Average:
69 | 42 0.07
Clear
Actual:
81 | 45 0.00
Average:
69 | 43 0.07
Scattered Clouds
Actual:
85 | 49 T
Average:
69 | 43 0.07
Thunderstorm
Actual:
78 | 54 0.02
Average:
69 | 43 0.07
Clear
Actual:
77 | 47 0.00
Average:
70 | 44 0.07
Scattered Clouds
Actual:
80 | 51 0.00
Average:
70 | 44 0.08
Rain
Actual:
79 | 48 0.02
Average:
70 | 44 0.07
Scattered Clouds
Actual:
78 | 48 0.00
Average:
70 | 44 0.08
Scattered Clouds
Actual:
70 | 46 0.00
Average:
71 | 45 0.08
Clear
Actual:
78 | 40 0.00
Average:
71 | 45 0.08
Rain
Actual:
76 | 52 T
Average:
71 | 45 0.08
 

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

2014 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 77 57 37 35 30 26 70 45 19 30.35 30.20 30.03 10 10 10 16 4 21 0.00  
2 76 61 46 43 38 29 77 48 18 30.02 29.94 29.87 10 10 10 26 8 33 0.00  
3 54 47 39 40 37 34 83 67 50 29.97 29.91 29.84 10 10 10 18 8 23 0.00  
4 62 51 39 43 37 33 82 59 36 29.90 29.84 29.78 10 9 2 30 7 40 0.12 Rain
5 63 50 37 37 34 30 85 59 32 29.90 29.85 29.80 10 10 10 21 7 30 0.00  
6 54 45 36 35 29 25 70 51 32 30.05 29.92 29.83 10 10 10 28 12 33 0.00  
7 54 43 32 28 26 25 70 53 35 30.06 29.98 29.87 10 10 10 13 5 21 T  
8 63 46 28 31 26 23 78 50 21 30.02 29.88 29.72 10 10 10 13 4 16 0.00  
9 62 51 39 41 31 24 68 47 25 29.89 29.75 29.67 10 10 9 25 8 30 0.02 Rain
10 56 45 33 34 30 25 76 56 35 30.16 29.95 29.84 10 10 10 25 9 32 0.00  
11 43 38 33 31 28 25 76 65 53 30.50 30.33 30.17 10 10 5 20 11 45 T Snow
12 59 43 26 27 19 12 85 51 17 30.57 30.50 30.38 10 10 10 14 5 18 0.00  
13 67 49 31 28 22 17 63 40 16 30.56 30.46 30.38 10 10 10 14 3 20 0.00  
14 69 53 36 35 29 24 70 45 20 30.45 30.35 30.23 10 10 10 18 5 28 0.00  
15 77 60 42 42 35 23 70 42 14 30.24 30.15 30.02 10 10 10 24 8 31 0.00  
16 63 55 46 45 41 38 86 64 42 30.19 30.12 30.04 10 10 7 20 7 26 0.02 Rain
17 73 58 42 46 42 38 96 63 29 30.08 29.91 29.75 10 10 9 23 5 29 0.01 Rain , Thunderstorm
18 60 52 43 46 40 36 83 64 44 29.80 29.75 29.70 10 10 10 22 6 26 0.07 Rain
19 66 56 45 38 35 30 71 51 30 29.99 29.88 29.81 10 10 10 28 11 33 0.00  
20 72 55 38 36 32 23 79 48 16 30.08 30.01 29.95 10 10 10 13 4 24 0.00  
21 79 60 40 38 31 20 79 46 12 30.09 30.01 29.94 10 10 10 13 4 15 0.00  
22 81 63 45 39 35 32 60 39 18 30.11 30.04 29.98 10 10 10 14 5 20 0.00  
23 85 67 49 42 38 34 61 40 18 30.07 29.95 29.82 10 10 10 24 5 38 T  
24 78 66 54 52 44 37 61 46 31 30.02 29.94 29.88 10 10 10 20 7 26 0.02 Rain , Thunderstorm
25 77 62 47 45 41 38 80 54 27 30.08 29.97 29.86 10 10 10 15 4 20 0.00  
26 80 66 51 42 40 38 71 48 25 30.04 29.93 29.85 10 10 10 23 9 30 0.00  
27 79 64 48 52 40 33 75 49 22 30.12 30.01 29.90 10 10 6 17 5 21 0.02 Rain
28 78 63 48 50 46 41 86 62 38 29.92 29.84 29.73 10 10 10 21 9 28 0.00  
29 70 58 46 35 25 19 47 31 15 30.13 30.07 29.95 10 10 10 24 13 33 0.00  
30 78 59 40 34 28 21 64 38 12 30.19 30.07 29.93 10 10 10 16 4 24 0.00  
31 76 64 52 46 39 34 71 47 23 29.97 29.93 29.84 10 10 6 33 6 40 T Rain