Weather History for Islip, NY

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Month of September, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 88 °F 74 °F 63 °F
Mean Temperature 80 °F 65 °F 55 °F
Min Temperature 74 °F 55 °F 44 °F
Degree Days  
Heating Degree Days (base 65) 10 3 0 83
Cooling Degree Days (base 65) 15 3 0 84
Growing Degree Days (base 50) 30 15 5 440
Dew Point  
Dew Point 73 °F 54 °F 35 °F
Precipitation  
Precipitation 0.60 in 0.07 in 0.00 in 1.83 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 26 mph 7 mph 0 mph
Gust Wind 32 mph 21 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.40 in 30.01 in 29.62 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 28, 2013 Rise Set
Actual Time 6:46 AM EDT 6:39 PM EDT
Civil Twilight 6:18 AM EDT 7:06 PM EDT
Nautical Twilight 5:46 AM EDT 7:38 PM EDT
Astronomical Twilight 5:14 AM EDT 8:10 PM EDT
Moon 12:29 AM EDT (9/28) 2:58 PM EDT (9/28)
Length of Visible Light 12h 47m
Length of Day
11h 52m
Last Quarter, 36% of the Moon is Illuminated
Sep 28
Last Quarter
Oct 4
New
Oct 11
First Quarter
Oct 18
Full
Oct 26
Last Quarter

Weather History Calendar

Precipitation Actual month total 1.83 Normal Month Total: 3.58
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Rain
Actual:
80 | 74 0.25
Average:
78 | 63 0.13
Rain
Actual:
78 | 69 0.04
Average:
78 | 63 0.12
Thunderstorm
Actual:
81 | 66 0.42
Average:
78 | 62 0.13
Scattered Clouds
Actual:
82 | 60 0.00
Average:
77 | 62 0.12
Partly Cloudy
Actual:
78 | 58 0.00
Average:
77 | 62 0.11
Partly Cloudy
Actual:
71 | 52 0.00
Average:
77 | 61 0.12
Partly Cloudy
Actual:
75 | 51 0.00
Average:
77 | 61 0.11
Partly Cloudy
Actual:
83 | 58 0.00
Average:
76 | 61 0.11
Partly Cloudy
Actual:
70 | 49 0.00
Average:
76 | 60 0.11
Rain
Actual:
78 | 67 T
Average:
76 | 60 0.11
Scattered Clouds
Actual:
88 | 71 0.00
Average:
76 | 60 0.10
Thunderstorm
Actual:
82 | 70 0.47
Average:
75 | 59 0.12
Rain
Actual:
78 | 60 0.05
Average:
75 | 59 0.11
Partly Cloudy
Actual:
69 | 54 0.00
Average:
75 | 58 0.12
Partly Cloudy
Actual:
69 | 48 0.00
Average:
74 | 58 0.12
Rain
Actual:
72 | 55 T
Average:
74 | 58 0.12
Scattered Clouds
Actual:
63 | 46 0.00
Average:
74 | 57 0.12
Clear
Actual:
69 | 44 0.00
Average:
73 | 57 0.12
Clear
Actual:
74 | 47 0.00
Average:
73 | 56 0.11
Fog
Actual:
76 | 52 0.00
Average:
73 | 56 0.12
Partly Cloudy
Actual:
76 | 55 T
Average:
72 | 55 0.13
Rain
Actual:
72 | 55 0.60
Average:
72 | 55 0.12
Clear
Actual:
66 | 51 0.00
Average:
71 | 55 0.11
Clear
Actual:
71 | 48 0.00
Average:
71 | 54 0.13
Partly Cloudy
Actual:
73 | 47 0.00
Average:
71 | 54 0.12
Partly Cloudy
Actual:
69 | 50 0.00
Average:
70 | 53 0.12
Partly Cloudy
Actual:
66 | 49 0.00
Average:
70 | 53 0.13
Scattered Clouds
Actual:
74 | 52 0.00
Average:
69 | 52 0.13
Scattered Clouds
Actual:
71 | 49 0.00
Average:
69 | 52 0.13
Partly Cloudy
Actual:
72 | 50 0.00
Average:
69 | 51 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

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 80 77 74 73 72 70 93 86 79 29.86 29.84 29.81 10 7 1 16 10 21 0.25 Rain
2 78 74 69 73 72 69 100 94 87 29.81 29.76 29.70 10 4 1 12 6 15 0.04 Rain
3 81 74 66 73 67 56 100 76 51 29.86 29.76 29.71 10 7 0 22 7 30 0.42 Fog , Rain , Thunderstorm
4 82 71 60 61 57 46 84 57 30 29.97 29.93 29.86 10 10 10 17 7 22 0.00  
5 78 68 58 62 53 40 90 62 33 30.12 29.98 29.91 10 10 10 20 9 24 0.00  
6 71 62 52 47 45 40 77 57 37 30.23 30.17 30.12 10 10 10 16 6 20 0.00  
7 75 63 51 60 50 44 83 59 35 30.12 30.02 29.90 10 10 10 16 7 21 0.00  
8 83 71 58 61 55 42 90 63 36 30.06 29.87 29.80 10 10 10 20 10 26 0.00  
9 70 60 49 57 46 42 73 56 39 30.23 30.18 30.08 10 10 10 13 6 16 0.00  
10 78 73 67 69 66 58 87 80 73 30.17 30.12 30.07 10 10 10 22 11 29 T Rain
11 88 80 71 73 70 69 93 77 61 30.11 30.06 29.99 10 9 5 20 8 24 0.00  
12 82 76 70 72 70 67 93 81 69 29.98 29.83 29.68 10 7 1 23 11 30 0.47 Rain , Thunderstorm
13 78 69 60 68 62 50 97 72 47 29.80 29.66 29.62 10 8 4 26 9 32 0.05 Rain
14 69 62 54 49 47 46 77 63 48 30.09 29.95 29.82 10 10 10 21 10 29 0.00  
15 69 59 48 56 49 45 86 65 44 30.20 30.13 30.09 10 10 10 13 5 16 0.00  
16 72 64 55 58 53 43 87 68 49 30.20 30.07 30.04 10 10 10 21 8 28 T Rain
17 63 55 46 43 37 35 80 58 36 30.40 30.34 30.24 10 10 10 25 9 30 0.00  
18 69 57 44 50 45 40 89 63 37 30.34 30.26 30.19 10 10 10 14 5 17 0.00  
19 74 61 47 55 50 45 93 66 38 30.19 30.13 30.08 10 9 1 15 5 20 0.00  
20 76 64 52 59 54 49 96 70 43 30.09 30.05 30.02 10 10 0 15 5 20 0.00 Fog
21 76 66 55 66 61 52 93 81 69 30.02 29.89 29.70 10 9 1 24 10 32 T  
22 72 64 55 67 57 41 93 67 41 29.88 29.71 29.64 10 9 2 21 11 31 0.60 Rain
23 66 59 51 44 40 38 66 53 39 30.02 29.96 29.89 10 10 10 20 11 28 0.00  
24 71 60 48 47 43 39 83 60 37 30.03 29.95 29.85 10 10 10 16 7 21 0.00  
25 73 60 47 51 47 42 86 62 37 29.94 29.91 29.87 10 10 10 13 4 16 0.00  
26 69 60 50 56 52 48 89 71 53 30.09 30.01 29.93 10 10 10 12 4 14 0.00  
27 66 58 49 54 50 47 93 73 52 30.26 30.18 30.10 10 10 3 16 7 21 0.00  
28 74 63 52 55 52 49 93 69 44 30.31 30.26 30.23 10 10 10 16 5 22 0.00  
29 71 60 49 54 49 38 96 63 29 30.23 30.15 30.08 10 9 1 14 5 20 0.00  
30 72 61 50 57 53 48 100 77 53 30.07 30.02 29.97 10 10 10 12 5 16 0.00