Weather History for San Juan, PR

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 93 °F 91 °F 89 °F
Mean Temperature 86 °F 85 °F 83 °F
Min Temperature 81 °F 79 °F 76 °F
Degree Days  
Heating Degree Days (base 65) 0 0 0 0
Cooling Degree Days (base 65) 21 20 18 603
Growing Degree Days (base 50) 36 35 32 1044
Dew Point  
Dew Point 79 °F 74 °F 68 °F
Precipitation  
Precipitation 0.47 in 0.09 in 0.00 in 2.16 in
Snowdepth - - - -
Wind  
Wind 22 mph 6 mph 0 mph
Gust Wind 31 mph 20 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.06 in 29.96 in 29.85 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 12, 2012 Rise Set
Actual Time 6:11 AM AST 6:28 PM AST
Civil Twilight 5:49 AM AST 6:50 PM AST
Nautical Twilight 5:24 AM AST 7:15 PM AST
Astronomical Twilight 4:58 AM AST 7:41 PM AST
Moon 2:49 AM AST (9/12) 3:53 PM AST (9/12)
Length of Visible Light 13h 00m
Length of Day
12h 17m
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 2.16 Normal Month Total: 5.77
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
89 | 79 0.02
Average:
89 | 78 0.20
Partly Cloudy
Actual:
89 | 80 0.01
Average:
89 | 78 0.21
Partly Cloudy
Actual:
90 | 78 0.00
Average:
89 | 78 0.20
Partly Cloudy
Actual:
91 | 79 0.02
Average:
89 | 78 0.22
Scattered Clouds
Actual:
90 | 79 0.00
Average:
89 | 78 0.22
Scattered Clouds
Actual:
91 | 80 0.00
Average:
89 | 78 0.21
Partly Cloudy
Actual:
91 | 79 0.00
Average:
89 | 78 0.22
Partly Cloudy
Actual:
91 | 80 0.00
Average:
89 | 78 0.21
Scattered Clouds
Actual:
92 | 78 0.00
Average:
89 | 78 0.21
Scattered Clouds
Actual:
91 | 79 0.00
Average:
89 | 78 0.20
Partly Cloudy
Actual:
91 | 79 0.00
Average:
89 | 78 0.20
Scattered Clouds
Actual:
91 | 79 T
Average:
89 | 78 0.20
Thunderstorm
Actual:
91 | 80 0.18
Average:
89 | 78 0.20
Thunderstorm
Actual:
92 | 79 0.04
Average:
89 | 78 0.19
Partly Cloudy
Actual:
92 | 79 T
Average:
89 | 78 0.18
Scattered Clouds
Actual:
91 | 79 0.00
Average:
89 | 78 0.19
Partly Cloudy
Actual:
92 | 80 T
Average:
89 | 78 0.18
Thunderstorm
Actual:
90 | 80 0.02
Average:
89 | 78 0.19
Rain
Actual:
91 | 79 0.05
Average:
89 | 78 0.18
Partly Cloudy
Actual:
91 | 81 0.00
Average:
89 | 78 0.19
Partly Cloudy
Actual:
91 | 80 T
Average:
89 | 78 0.18
Rain
Actual:
93 | 78 0.05
Average:
89 | 78 0.18
Rain
Actual:
92 | 78 0.09
Average:
89 | 78 0.18
Partly Cloudy
Actual:
92 | 80 T
Average:
89 | 78 0.18
Thunderstorm
Actual:
89 | 76 0.36
Average:
89 | 78 0.18
Rain
Actual:
89 | 77 0.40
Average:
89 | 78 0.17
Rain
Actual:
90 | 77 0.10
Average:
89 | 78 0.18
Rain
Actual:
90 | 78 0.35
Average:
89 | 78 0.17
Scattered Clouds
Actual:
92 | 79 0.00
Average:
89 | 78 0.18
Rain
Actual:
91 | 78 0.47
Average:
89 | 78 0.17
 

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 89 84 79 74 73 72 85 72 59 30.01 29.97 29.93 10 10 10 14 6 20 0.02  
2 89 85 80 75 74 73 79 71 63 29.99 29.94 29.90 10 10 10 15 6 24 0.01  
3 90 84 78 75 72 68 74 64 53 30.04 29.98 29.94 10 10 10 12 4 24 0.00  
4 91 85 79 74 72 68 74 62 50 30.01 29.98 29.96 10 10 10 13 5 24 0.02  
5 90 85 79 75 73 71 79 68 56 30.02 29.97 29.94 10 10 10 12 5 20 0.00  
6 91 86 80 75 73 71 79 68 56 30.01 29.98 29.94 10 10 10 13 5 20 0.00  
7 91 85 79 75 73 69 79 66 52 29.98 29.94 29.90 10 10 10 14 5 23 0.00  
8 91 86 80 75 74 72 79 68 56 30.03 29.97 29.92 10 10 9 15 6 22 0.00  
9 92 85 78 74 72 69 79 66 52 30.06 30.01 29.98 10 10 9 18 7 22 0.00  
10 91 85 79 74 72 69 79 64 49 30.03 30.00 29.96 10 10 10 16 6 21 0.00  
11 91 85 79 75 73 71 79 68 56 30.02 29.98 29.93 10 10 10 17 7 22 0.00  
12 91 85 79 74 73 71 79 68 56 29.97 29.93 29.88 10 10 10 18 6 22 T  
13 91 86 80 77 75 73 85 72 59 29.97 29.92 29.90 10 10 10 20 6 24 0.18 Rain , Thunderstorm
14 92 86 79 77 75 73 91 77 63 29.99 29.95 29.91 10 10 10 17 4 21 0.04 Thunderstorm
15 92 86 79 78 76 74 91 75 59 30.01 29.96 29.92 10 10 9 21 4 25 T  
16 91 85 79 76 75 72 91 72 52 29.99 29.96 29.92 10 10 10 16 6 22 0.00  
17 92 86 80 77 75 73 85 71 56 30.01 29.97 29.94 10 10 10 16 7 23 T  
18 90 85 80 78 76 75 85 77 68 30.03 29.98 29.94 10 10 10 18 6 23 0.02 Rain , Thunderstorm
19 91 85 79 77 76 74 91 74 56 30.01 29.97 29.91 10 10 8 20 9 25 0.05 Rain
20 91 86 81 76 75 73 85 72 59 29.97 29.91 29.85 10 10 10 17 7 25 0.00  
21 91 86 80 76 74 73 85 72 59 29.96 29.91 29.85 10 10 10 17 4 23 T  
22 93 86 78 78 74 70 91 74 57 30.03 29.98 29.93 10 10 7 20 6 24 0.05 Rain
23 92 85 78 76 74 73 85 71 56 30.06 30.01 29.96 10 9 6 22 8 26 0.09 Rain
24 92 86 80 76 74 72 85 71 56 30.02 29.98 29.92 10 10 9 20 8 24 T  
25 89 83 76 76 74 72 85 74 63 30.02 29.98 29.96 10 10 5 21 7 26 0.36 Rain , Thunderstorm
26 89 83 77 77 75 73 91 77 63 30.01 29.97 29.93 10 10 10 16 5 20 0.40 Rain
27 90 84 77 76 74 72 91 74 56 29.98 29.93 29.89 10 10 9 16 4 22 0.10 Rain
28 90 84 78 77 74 72 85 72 59 29.97 29.93 29.89 10 10 1 18 3 23 0.35 Rain
29 92 86 79 76 74 72 91 74 56 29.99 29.96 29.91 10 10 10 15 4 20 0.00  
30 91 85 78 79 75 72 85 71 56 30.01 29.98 29.94 10 10 1 22 4 31 0.47 Rain