Weather History for Pontiac, MI

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Month of September, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 95 °F 70 °F 52 °F
Mean Temperature 81 °F 62 °F 46 °F
Min Temperature 71 °F 54 °F 39 °F
Degree Days  
Heating Degree Days (base 65) 20 6 0 169
Cooling Degree Days (base 65) 16 2 0 68
Growing Degree Days (base 50) 31 12 0 354
Dew Point  
Dew Point 72 °F 54 °F 34 °F
Precipitation  
Precipitation 0.73 in 0.12 in 0.00 in 3.58 in
Snowdepth - - - -
Wind  
Wind 26 mph 6 mph 0 mph
Gust Wind 40 mph 20 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.43 in 29.98 in 29.47 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 11, 2011 Rise Set
Actual Time 7:08 AM EDT 7:51 PM EDT
Civil Twilight 6:40 AM EDT 8:19 PM EDT
Nautical Twilight 6:06 AM EDT 8:53 PM EDT
Astronomical Twilight 5:31 AM EDT 9:28 PM EDT
Moon 7:11 PM EDT (9/11) 6:27 AM EDT (9/11)
Length of Visible Light 13h 39m
Length of Day
12h 42m
Full, 100% of the Moon is Illuminated
Sep 11
Full
Sep 12
Full
Sep 20
Last Quarter
Sep 27
New
Oct 3
First Quarter

Weather History Calendar

Precipitation Actual month total 3.58 Average Month Total: 1.94
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Fog
Actual:
88 | 66 0.00
Average:
76 | 56 0.05
Rain
Actual:
95 | 69 0.00
Average:
76 | 56 0.05
Thunderstorm
Actual:
91 | 71 0.08
Average:
76 | 56 0.05
Thunderstorm
Actual:
75 | 62 0.03
Average:
76 | 55 0.05
Mostly Cloudy
Actual:
60 | 52 0.01
Average:
75 | 55 0.05
Partly Cloudy
Actual:
66 | 52 0.00
Average:
75 | 55 0.06
Rain
Actual:
61 | 52 0.39
Average:
75 | 55 0.06
Rain
Actual:
64 | 57 0.16
Average:
74 | 54 0.06
Thunderstorm
Actual:
77 | 62 0.14
Average:
74 | 54 0.06
Thunderstorm
Actual:
75 | 62 0.73
Average:
73 | 54 0.06
Thunderstorm
Actual:
77 | 62 0.00
Average:
73 | 53 0.06
Fog
Actual:
80 | 60 0.01
Average:
73 | 53 0.07
Partly Cloudy
Actual:
75 | 57 0.00
Average:
73 | 52 0.07
Rain
Actual:
68 | 48 0.27
Average:
72 | 52 0.07
Partly Cloudy
Actual:
57 | 41 0.00
Average:
72 | 51 0.07
Partly Cloudy
Actual:
57 | 42 0.00
Average:
71 | 51 0.07
Partly Cloudy
Actual:
64 | 50 0.00
Average:
71 | 50 0.07
Partly Cloudy
Actual:
66 | 48 0.00
Average:
70 | 50 0.07
Rain
Actual:
66 | 60 0.46
Average:
69 | 49 0.07
Fog
Actual:
70 | 50 0.00
Average:
69 | 48 0.07
Partly Cloudy
Actual:
75 | 59 0.01
Average:
68 | 48 0.07
Rain
Actual:
69 | 51 0.02
Average:
68 | 48 0.07
Rain
Actual:
57 | 51 0.16
Average:
67 | 47 0.07
Fog
Actual:
64 | 46 0.00
Average:
67 | 47 0.07
Rain
Actual:
72 | 52 0.01
Average:
67 | 46 0.07
Thunderstorm
Actual:
71 | 54 0.40
Average:
66 | 46 0.07
Rain
Actual:
68 | 46 0.10
Average:
66 | 45 0.07
Rain
Actual:
63 | 52 0.22
Average:
65 | 45 0.07
Rain
Actual:
62 | 51 0.23
Average:
64 | 44 0.07
Rain
Actual:
52 | 39 0.15
Average:
64 | 44 0.07
 

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 88 77 66 67 65 61 90 68 40 30.01 29.97 29.94 10 9 5 8 3 - 0.00 Fog
2 95 81 69 72 69 66 94 71 40 29.97 29.91 29.86 10 7 2 18 4 26 0.00 Rain
3 91 80 71 72 69 65 93 72 43 29.95 29.86 29.79 10 7 4 14 5 25 0.08 Rain , Thunderstorm
4 75 68 62 68 64 53 94 80 59 29.88 29.82 29.79 10 9 2 16 8 22 0.03 Rain , Thunderstorm
5 60 56 52 54 49 43 94 79 67 30.11 30.00 29.89 10 9 4 16 12 23 0.01  
6 66 58 52 51 48 44 86 72 56 30.16 30.13 30.09 10 10 10 14 11 25 0.00  
7 61 56 52 56 53 49 94 88 77 30.14 30.08 30.04 10 8 2 16 10 25 0.39 Rain
8 64 60 57 61 57 54 94 87 80 30.04 30.01 29.99 10 7 2 15 11 23 0.16 Rain
9 77 68 62 65 62 58 96 80 61 29.99 29.95 29.90 10 9 2 9 5 - 0.14 Rain , Thunderstorm
10 75 68 62 64 61 59 97 86 59 30.05 30.00 29.96 10 8 2 9 3 - 0.73 Rain , Thunderstorm
11 77 70 62 63 61 58 94 79 52 30.05 30.00 29.94 10 7 2 10 2 - 0.00 Fog , Thunderstorm
12 80 70 60 64 61 58 93 73 54 29.99 29.93 29.84 10 9 6 15 5 17 0.01 Fog
13 75 66 57 63 58 50 77 69 61 29.95 29.81 29.75 10 10 7 16 10 22 0.00  
14 68 57 48 52 48 43 94 76 48 30.08 30.01 29.95 10 10 4 15 5 21 0.27 Rain
15 57 49 41 41 37 34 93 66 44 30.33 30.23 30.10 10 10 10 18 10 23 0.00  
16 57 50 42 41 37 34 89 64 42 30.43 30.37 30.33 10 10 10 10 4 - 0.00  
17 64 57 50 46 42 37 83 63 41 30.41 30.36 30.32 10 10 10 13 7 - 0.00  
18 66 57 48 56 48 44 93 72 48 30.34 30.26 30.12 10 10 10 17 7 22 0.00  
19 66 63 60 64 60 55 100 89 73 30.10 29.93 29.86 10 8 2 13 9 21 0.46 Rain
20 70 60 50 56 52 44 100 85 42 30.11 30.06 29.99 10 5 0 9 4 - 0.00 Fog
21 75 67 59 64 59 48 94 81 50 30.05 29.97 29.87 10 5 1 13 5 24 0.01  
22 69 60 51 53 50 46 89 71 45 30.13 30.05 29.99 10 10 9 14 3 17 0.02 Rain
23 57 54 51 52 51 50 97 90 82 30.12 30.02 29.96 10 9 3 12 4 21 0.16 Rain
24 64 55 46 50 48 44 97 77 50 30.07 30.04 29.99 10 10 7 12 5 - 0.00 Fog
25 72 62 52 61 57 50 94 83 64 30.06 30.01 29.91 10 8 2 14 5 20 0.01 Fog , Rain
26 71 64 54 64 60 51 100 87 65 29.88 29.79 29.68 10 7 3 20 8 28 0.40 Fog , Rain , Thunderstorm
27 68 56 46 55 50 44 100 80 45 29.86 29.84 29.81 10 8 4 13 3 21 0.10 Fog , Rain
28 63 58 52 54 53 44 94 84 52 29.83 29.80 29.77 10 7 2 9 5 16 0.22 Rain
29 62 56 51 55 52 46 97 86 72 29.76 29.64 29.49 10 7 3 13 5 20 0.23 Fog , Rain
30 52 46 39 50 45 37 100 90 76 29.96 29.66 29.47 10 7 2 26 12 40 0.15 Rain