Weather History for Groton, CT

Change the Weather History Date:

Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 84 °F 73 °F 60 °F
Mean Temperature 76 °F 64 °F 54 °F
Min Temperature 69 °F 57 °F 42 °F
Degree Days  
Heating Degree Days (base 65) 10 3 0 81
Cooling Degree Days (base 65) 11 2 0 65
Growing Degree Days (base 50) 26 14 4 435
Dew Point  
Dew Point 73 °F 58 °F 40 °F
Precipitation  
Precipitation 2.32 in 0.13 in 0.00 in 3.98 in
Snowdepth - - - -
Wind  
Wind 36 mph 8 mph 0 mph
Gust Wind 45 mph 23 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.37 in 30.02 in 29.64 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

Sep. 12, 2012 Rise Set
Actual Time 6:26 AM EDT 7:01 PM EDT
Civil Twilight 5:58 AM EDT 7:29 PM EDT
Nautical Twilight 5:25 AM EDT 8:02 PM EDT
Astronomical Twilight 4:51 AM EDT 8:36 PM EDT
Moon 2:38 AM EDT (9/12) 4:49 PM EDT (9/12)
Length of Visible Light 13h 31m
Length of Day
12h 35m
Waning Crescent, 14% of the Moon is Illuminated
Sep 12
Waning Crescent
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter

Weather History Calendar

Precipitation Actual month total 3.98 Average Month Total: 3.50
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
84 | 66 0.00
Average:
77 | 58 0.06
Partly Cloudy
Actual:
75 | 63 0.00
Average:
77 | 58 0.13
Partly Cloudy
Actual:
73 | 60 0.00
Average:
76 | 58 0.16
Rain
Actual:
75 | 69 0.85
Average:
76 | 58 0.17
Thunderstorm
Actual:
78 | 68 0.33
Average:
76 | 57 0.07
Partly Cloudy
Actual:
73 | 66 0.00
Average:
76 | 57 0.09
Fog
Actual:
79 | 69 0.00
Average:
76 | 57 0.13
Rain
Actual:
80 | 66 0.13
Average:
74 | 55 0.10
Rain
Actual:
75 | 61 0.04
Average:
73 | 54 0.07
Partly Cloudy
Actual:
73 | 55 0.00
Average:
75 | 55 0.13
Clear
Actual:
71 | 48 0.00
Average:
75 | 56 0.05
Clear
Actual:
73 | 50 0.00
Average:
75 | 55 0.09
Clear
Actual:
78 | 55 0.00
Average:
74 | 55 0.11
Clear
Actual:
75 | 57 0.00
Average:
74 | 55 0.10
Rain
Actual:
73 | 55 0.00
Average:
72 | 53 0.28
Scattered Clouds
Actual:
73 | 51 0.00
Average:
73 | 53 0.08
Clear
Actual:
71 | 48 0.00
Average:
72 | 53 0.07
Rain
Actual:
73 | 55 0.16
Average:
72 | 53 0.15
Rain
Actual:
72 | 53 2.32
Average:
72 | 52 0.16
Clear
Actual:
66 | 48 0.00
Average:
70 | 52 0.07
Clear
Actual:
69 | 51 0.00
Average:
70 | 53 0.13
Partly Cloudy
Actual:
71 | 53 0.00
Average:
71 | 52 0.30
Rain
Actual:
70 | 48 0.03
Average:
70 | 50 0.14
Scattered Clouds
Actual:
66 | 45 0.00
Average:
68 | 48 0.10
Clear
Actual:
71 | 42 0.02
Average:
68 | 49 0.05
Partly Cloudy
Actual:
73 | 64 0.00
Average:
69 | 51 0.18
Rain
Actual:
75 | 63 0.00
Average:
70 | 51 0.09
Thunderstorm
Actual:
68 | 59 0.03
Average:
68 | 48 0.04
Rain
Actual:
60 | 57 0.07
Average:
67 | 49 0.14
Rain
Actual:
64 | 55 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

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 84 76 66 67 63 59 78 68 54 30.09 29.98 29.88 10 8 6 18 7 25 0.00  
2 75 69 63 65 61 57 88 76 55 30.12 30.08 30.04 10 10 9 8 4 - 0.00  
3 73 66 60 63 60 57 94 80 61 30.20 30.16 30.12 10 9 7 17 8 20 0.00  
4 75 72 69 72 70 63 94 90 78 30.14 30.00 29.88 10 5 0 16 8 - 0.85 Fog , Rain
5 78 72 68 73 71 66 94 90 82 29.87 29.79 29.76 10 5 1 21 11 26 0.33 Rain , Thunderstorm
6 73 70 66 70 66 63 100 86 68 29.91 29.87 29.81 10 9 1 9 4 - 0.00  
7 79 74 69 72 70 66 100 90 74 29.94 29.90 29.87 8 3 0 9 2 - 0.00 Fog
8 80 75 66 72 70 61 94 86 74 29.90 29.78 29.64 10 6 2 20 9 30 0.13 Rain
9 75 68 61 60 57 52 90 75 44 29.86 29.81 29.74 10 10 9 10 5 - 0.04 Rain
10 73 64 55 57 49 44 84 61 41 30.09 29.94 29.83 10 10 10 18 9 23 0.00  
11 71 58 48 53 47 42 89 62 40 30.28 30.21 30.10 10 10 10 12 7 18 0.00  
12 73 62 50 61 56 48 93 76 57 30.36 30.33 30.29 10 10 9 13 5 - 0.00  
13 78 65 55 63 60 54 97 77 64 30.37 30.33 30.29 10 9 2 13 6 - 0.00  
14 75 65 57 65 61 55 94 81 70 30.29 30.20 30.10 10 10 8 13 5 - 0.00  
15 73 64 55 64 54 47 93 67 42 30.08 30.04 30.00 10 10 7 20 9 28 0.00 Rain
16 73 62 51 53 48 44 90 65 38 30.10 30.06 30.01 10 10 10 15 5 20 0.00  
17 71 60 48 59 52 45 93 73 54 30.11 30.07 30.05 10 10 8 9 4 - 0.00  
18 73 64 55 70 65 53 94 82 68 30.06 29.87 29.70 10 6 2 31 16 41 0.16 Rain
19 72 62 53 70 57 42 96 76 38 30.17 29.88 29.71 10 8 0 36 16 45 2.32 Fog , Rain
20 66 57 48 51 48 45 86 70 56 30.22 30.18 30.14 10 10 10 15 10 - 0.00  
21 69 60 51 57 51 48 89 78 52 30.15 30.09 30.02 10 10 10 12 6 - 0.00  
22 71 62 53 66 57 50 94 84 65 30.01 29.93 29.81 10 9 2 20 7 - 0.00  
23 70 58 48 64 51 41 90 68 36 30.10 29.97 29.82 10 10 8 17 9 24 0.03 Rain
24 66 54 45 47 44 41 90 71 45 30.15 30.11 30.08 10 10 10 12 5 - 0.00  
25 71 56 42 56 49 40 93 68 47 30.20 30.16 30.14 10 10 7 22 9 29 0.02  
26 73 68 64 65 62 56 90 77 69 30.16 30.08 30.02 10 8 6 20 15 25 0.00  
27 75 70 63 65 60 55 90 77 50 30.21 30.13 30.02 10 8 6 16 6 - 0.00 Rain
28 68 64 59 65 58 50 94 81 65 30.21 30.07 29.92 10 8 4 21 13 30 0.03 Rain , Thunderstorm
29 60 58 57 57 55 54 94 91 87 29.92 29.90 29.87 10 7 2 13 7 - 0.07 Rain
30 64 60 55 55 53 45 94 83 62 29.88 29.81 29.74 10 8 5 13 6 18 0.00 Rain