Weather History for Grand Rapids, MI

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 89 °F 74 °F 57 °F
Mean Temperature 76 °F 63 °F 49 °F
Min Temperature 69 °F 52 °F 39 °F
Degree Days  
Heating Degree Days (base 65) 16 4 0 125
Cooling Degree Days (base 65) 11 2 0 73
Growing Degree Days (base 50) 26 13 0 394
Dew Point  
Dew Point 71 °F 50 °F 31 °F
Precipitation  
Precipitation 1.11 in 0.08 in 0.00 in 1.97 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 31 mph 8 mph 0 mph
Gust Wind 56 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.35 in 30.01 in 29.71 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 10, 2012 Rise Set
Actual Time 7:16 AM EDT 8:00 PM EDT
Civil Twilight 6:48 AM EDT 8:28 PM EDT
Nautical Twilight 6:14 AM EDT 9:02 PM EDT
Astronomical Twilight 5:39 AM EDT 9:37 PM EDT
Moon 1:31 AM EDT (9/10) 4:35 PM EDT (9/10)
Length of Visible Light 13h 40m
Length of Day
12h 43m
Waning Crescent, 30% of the Moon is Illuminated
Sep 10
Waning Crescent
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter

Weather History Calendar

Precipitation Actual month total 1.97 Normal Month Total: 4.28
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
82 | 64 0.00
Average:
78 | 58 0.13
Partly Cloudy
Actual:
85 | 66 0.00
Average:
78 | 58 0.14
Scattered Clouds
Actual:
89 | 62 0.00
Average:
78 | 57 0.13
Thunderstorm
Actual:
83 | 69 1.11
Average:
77 | 57 0.14
Partly Cloudy
Actual:
84 | 68 0.00
Average:
77 | 57 0.13
Partly Cloudy
Actual:
84 | 62 0.00
Average:
77 | 56 0.14
Rain
Actual:
77 | 58 0.12
Average:
77 | 56 0.14
Rain
Actual:
71 | 52 T
Average:
76 | 56 0.14
Fog
Actual:
73 | 53 T
Average:
76 | 55 0.14
Scattered Clouds
Actual:
75 | 46 0.00
Average:
75 | 55 0.14
Scattered Clouds
Actual:
81 | 53 0.00
Average:
75 | 55 0.14
Scattered Clouds
Actual:
84 | 58 0.00
Average:
75 | 54 0.14
Rain
Actual:
77 | 54 0.22
Average:
74 | 54 0.14
Rain
Actual:
73 | 49 0.02
Average:
74 | 53 0.14
Clear
Actual:
76 | 44 0.00
Average:
74 | 53 0.15
Partly Cloudy
Actual:
78 | 50 0.00
Average:
73 | 53 0.15
Thunderstorm
Actual:
78 | 53 0.02
Average:
73 | 52 0.15
Thunderstorm
Actual:
62 | 45 0.03
Average:
72 | 52 0.16
Rain
Actual:
68 | 39 T
Average:
72 | 51 0.15
Thunderstorm
Actual:
69 | 52 0.11
Average:
71 | 51 0.16
Rain
Actual:
67 | 46 0.20
Average:
71 | 51 0.16
Rain
Actual:
62 | 48 0.14
Average:
70 | 50 0.15
Partly Cloudy
Actual:
57 | 40 T
Average:
70 | 50 0.15
Partly Cloudy
Actual:
64 | 39 0.00
Average:
70 | 49 0.14
Partly Cloudy
Actual:
74 | 47 0.00
Average:
69 | 49 0.15
Partly Cloudy
Actual:
72 | 49 0.00
Average:
69 | 49 0.14
Partly Cloudy
Actual:
68 | 49 0.00
Average:
68 | 48 0.14
Partly Cloudy
Actual:
71 | 49 0.00
Average:
68 | 48 0.14
Scattered Clouds
Actual:
75 | 43 0.00
Average:
67 | 47 0.13
Scattered Clouds
Actual:
68 | 45 0.00
Average:
67 | 47 0.13
 

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

2012 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 82 73 64 63 56 51 73 58 42 30.14 30.09 30.05 10 10 10 14 9 17 0.00  
2 85 76 66 67 62 58 84 66 48 30.05 30.00 29.94 10 10 10 17 11 22 0.00  
3 89 76 62 69 64 59 90 70 50 29.99 29.94 29.88 10 10 10 12 6 15 0.00  
4 83 76 69 71 68 65 90 78 65 29.92 29.88 29.85 10 8 2 22 5 28 1.11 Rain , Thunderstorm
5 84 76 68 69 66 61 97 74 51 29.87 29.83 29.76 10 8 2 17 6 22 0.00  
6 84 73 62 64 61 56 93 69 44 29.94 29.89 29.83 10 10 7 16 6 20 0.00  
7 77 68 58 61 58 54 93 74 54 29.94 29.85 29.73 10 9 7 28 4 35 0.12 Rain
8 71 62 52 55 51 46 93 69 44 29.86 29.80 29.75 10 10 8 22 9 28 T Rain
9 73 63 53 53 48 41 93 62 31 30.13 30.00 29.86 10 10 9 15 5 18 T Fog
10 75 61 46 52 48 43 93 67 41 30.25 30.18 30.14 10 10 10 13 4 21 0.00  
11 81 67 53 54 51 47 89 63 36 30.18 30.14 30.09 10 10 10 22 10 28 0.00  
12 84 71 58 59 55 52 78 56 34 30.19 30.15 30.12 10 10 10 20 9 24 0.00  
13 77 66 54 63 57 51 93 73 53 30.32 30.23 30.15 10 9 5 18 8 22 0.22 Rain
14 73 61 49 54 47 40 93 64 35 30.33 30.30 30.26 10 10 8 23 6 26 0.02 Rain
15 76 60 44 48 44 40 92 61 29 30.35 30.27 30.16 10 10 10 10 3 13 0.00  
16 78 64 50 56 48 43 83 57 31 30.15 30.08 30.01 10 10 10 14 7 17 0.00  
17 78 66 53 61 54 48 83 65 46 30.00 29.85 29.71 10 10 6 18 9 24 0.02 Rain , Thunderstorm
18 62 54 45 57 46 31 93 65 36 29.99 29.79 29.71 10 10 8 25 11 33 0.03 Rain , Thunderstorm
19 68 54 39 42 39 36 92 63 34 30.10 30.00 29.87 10 10 10 24 11 30 T Rain
20 69 61 52 51 45 39 72 55 37 29.89 29.86 29.82 10 10 7 22 11 26 0.11 Rain , Thunderstorm
21 67 57 46 52 47 38 93 65 37 29.92 29.88 29.77 10 10 7 31 8 38 0.20 Rain
22 62 55 48 48 44 40 93 71 49 30.10 29.90 29.74 10 10 9 20 8 25 0.14 Rain
23 57 49 40 45 39 34 93 68 43 30.23 30.18 30.11 10 10 10 20 7 26 T  
24 64 52 39 41 37 34 92 63 34 30.21 30.07 29.89 10 10 10 28 13 33 0.00  
25 74 61 47 52 47 37 86 67 47 29.93 29.88 29.83 10 10 10 17 8 22 0.00  
26 72 61 49 54 48 41 93 64 35 30.16 29.99 29.89 10 10 9 13 6 15 0.00  
27 68 59 49 47 45 43 80 61 42 30.26 30.20 30.17 10 10 10 16 9 21 0.00  
28 71 60 49 48 44 34 86 56 26 30.20 30.15 30.11 10 10 10 12 4 56 0.00  
29 75 59 43 50 42 38 89 58 27 30.12 30.04 29.96 10 10 10 15 5 20 0.00  
30 68 57 45 48 43 39 100 69 37 30.01 29.98 29.95 10 10 10 18 7 25 0.00