Weather History for Groton, CT

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Month of September, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 87 °F 73 °F 64 °F
Mean Temperature 78 °F 63 °F 54 °F
Min Temperature 72 °F 54 °F 42 °F
Degree Days  
Heating Degree Days (base 65) 12 4 0 124
Cooling Degree Days (base 65) 12 2 0 59
Growing Degree Days (base 50) 28 13 4 387
Dew Point  
Dew Point 74 °F 55 °F 35 °F
Precipitation  
Precipitation 0.58 in 0.06 in 0.00 in 1.88 in
Snowdepth - - - -
Wind  
Wind 26 mph 6 mph 0 mph
Gust Wind 76 mph 21 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.41 in 30.01 in 29.60 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 30, 2013 Rise Set
Actual Time 6:44 AM EDT 6:31 PM EDT
Civil Twilight 6:16 AM EDT 6:58 PM EDT
Nautical Twilight 5:44 AM EDT 7:30 PM EDT
Astronomical Twilight 5:12 AM EDT 8:03 PM EDT
Moon 2:15 AM EDT (9/30) 4:02 PM EDT (9/30)
Length of Visible Light 12h 42m
Length of Day
11h 47m
Waning Crescent, 19% of the Moon is Illuminated
Sep 30
Waning Crescent
Oct 4
New
Oct 11
First Quarter
Oct 18
Full
Oct 26
Last Quarter

Weather History Calendar

Precipitation Actual month total 1.88 Average Month Total: 3.50
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Thunderstorm
Actual:
79 | 72 0.01
Average:
77 | 58 0.06
Thunderstorm
Actual:
75 | 71 0.41
Average:
77 | 58 0.13
Rain
Actual:
75 | 63 0.58
Average:
76 | 58 0.16
Clear
Actual:
78 | 59 0.00
Average:
76 | 58 0.17
Scattered Clouds
Actual:
79 | 55 0.00
Average:
76 | 57 0.07
Clear
Actual:
68 | 50 0.00
Average:
76 | 57 0.09
Rain
Actual:
75 | 48 0.00
Average:
76 | 57 0.13
Scattered Clouds
Actual:
81 | 55 0.00
Average:
74 | 55 0.10
Clear
Actual:
68 | 46 0.00
Average:
73 | 54 0.07
Rain
Actual:
73 | 66 0.00
Average:
75 | 55 0.13
Thunderstorm
Actual:
87 | 68 0.00
Average:
75 | 56 0.05
Thunderstorm
Actual:
78 | 69 0.36
Average:
75 | 55 0.09
Rain
Actual:
78 | 62 0.01
Average:
74 | 55 0.11
Scattered Clouds
Actual:
71 | 54 0.00
Average:
74 | 55 0.10
Clear
Actual:
68 | 48 0.00
Average:
72 | 53 0.28
Rain
Actual:
71 | 53 0.00
Average:
73 | 53 0.08
Clear
Actual:
64 | 43 0.00
Average:
72 | 53 0.07
Clear
Actual:
68 | 42 0.00
Average:
72 | 53 0.15
Clear
Actual:
71 | 50 0.00
Average:
72 | 52 0.16
Fog
Actual:
73 | 48 0.00
Average:
70 | 52 0.07
Partly Cloudy
Actual:
73 | 54 0.00
Average:
70 | 53 0.13
Rain
Actual:
73 | 53 0.51
Average:
71 | 52 0.30
Clear
Actual:
64 | 46 0.00
Average:
70 | 50 0.14
Clear
Actual:
70 | 43 0.00
Average:
68 | 48 0.10
Scattered Clouds
Actual:
71 | 45 0.00
Average:
68 | 49 0.05
Partly Cloudy
Actual:
68 | 51 0.00
Average:
69 | 51 0.18
Partly Cloudy
Actual:
68 | 52 0.00
Average:
70 | 51 0.09
Scattered Clouds
Actual:
72 | 50 0.00
Average:
68 | 48 0.04
Fog
Actual:
68 | 48 0.00
Average:
67 | 49 0.14
Scattered Clouds
Actual:
71 | 51 0.00
Average:
68 | 47 0.06
 

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
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 79 74 72 73 72 71 100 93 83 29.88 29.85 29.83 7 6 2 14 6 - 0.01 Rain , Thunderstorm
2 75 73 71 73 72 70 100 98 88 29.85 29.79 29.72 7 2 0 9 5 - 0.41 Fog , Rain , Thunderstorm
3 75 70 63 72 69 60 100 95 83 29.85 29.77 29.70 10 3 0 15 4 20 0.58 Fog , Rain
4 78 67 59 62 59 56 97 73 50 29.94 29.91 29.84 10 10 9 15 7 23 0.00  
5 79 66 55 62 55 46 97 70 42 30.13 29.97 29.89 10 9 6 13 4 21 0.00  
6 68 59 50 50 46 40 93 65 37 30.24 30.18 30.13 10 10 10 13 8 - 0.00  
7 75 62 48 60 52 46 97 70 40 30.12 30.02 29.90 10 10 10 16 5 23 0.00 Rain
8 81 68 55 63 55 43 84 61 35 30.08 29.87 29.78 10 10 8 16 9 26 0.00  
9 68 56 46 55 46 41 83 62 43 30.25 30.19 30.11 10 10 10 15 8 - 0.00  
10 73 70 66 70 66 56 94 84 70 30.18 30.11 30.04 10 8 5 16 11 17 0.00 Rain
11 87 78 68 74 70 66 97 87 65 30.11 30.07 30.01 6 4 2 12 5 16 0.00 Thunderstorm
12 78 74 69 72 70 68 100 90 78 29.99 29.85 29.70 7 4 1 22 7 30 0.36 Rain , Thunderstorm
13 78 71 62 70 66 55 100 85 62 29.77 29.64 29.60 10 6 0 14 3 - 0.01 Fog , Rain
14 71 62 54 54 51 48 86 70 53 30.08 29.93 29.79 10 10 10 13 9 18 0.00  
15 68 57 48 57 49 43 90 70 45 30.18 30.12 30.08 10 10 10 14 6 - 0.00  
16 71 62 53 58 54 39 90 75 56 30.22 30.08 30.03 10 10 8 16 6 76 0.00 Rain
17 64 54 43 45 39 35 93 62 38 30.41 30.35 30.25 10 10 10 15 11 23 0.00  
18 68 54 42 54 45 40 96 69 40 30.34 30.26 30.18 10 10 10 13 5 - 0.00  
19 71 60 50 57 53 47 93 74 49 30.18 30.12 30.07 10 10 9 14 5 - 0.00  
20 73 60 48 63 55 46 100 89 66 30.10 30.06 30.03 10 7 0 10 3 - 0.00 Fog
21 73 64 54 67 63 53 100 88 76 30.04 29.92 29.73 10 9 2 18 8 - 0.00  
22 73 62 53 67 58 43 100 77 49 29.86 29.71 29.64 10 8 1 26 12 34 0.51 Rain
23 64 55 46 46 43 40 80 65 47 30.02 29.94 29.86 10 10 10 15 9 20 0.00  
24 70 56 43 50 43 39 90 67 39 30.03 29.93 29.83 10 10 10 13 6 17 0.00  
25 71 56 45 57 49 43 93 72 47 29.96 29.91 29.87 10 10 10 12 5 22 0.00  
26 68 59 51 52 50 48 93 74 52 30.11 30.03 29.97 10 10 10 9 6 - 0.00  
27 68 60 52 54 52 50 97 77 58 30.27 30.19 30.11 10 10 10 12 6 - 0.00  
28 72 60 50 58 53 48 97 82 59 30.31 30.28 30.25 10 10 9 10 3 - 0.00  
29 68 57 48 55 51 48 100 87 54 30.25 30.18 30.10 10 7 0 15 5 - 0.00 Fog
30 71 61 51 54 51 47 96 80 42 30.09 30.03 29.97 10 9 6 10 7 - 0.00