Weather History for Palo Alto, CA

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Month of September, 2010

  Max Avg Min Sum
Temperature  
Max Temperature 93 °F 82 °F 69 °F
Mean Temperature 78 °F 69 °F 62 °F
Min Temperature 62 °F 56 °F 46 °F
Degree Days  
Heating Degree Days (base 65) 4 1 0 7
Cooling Degree Days (base 65) 12 4 0 43
Growing Degree Days (base 50) 28 19 12 186
Dew Point  
Dew Point 66 °F 56 °F 45 °F
Precipitation  
Precipitation 0.00 in 0.00 in 0.00 in 0.00 in
Snowdepth - - - -
Wind  
Wind 20 mph 8 mph 0 mph
Gust Wind 28 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.08 in 29.90 in 29.70 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 11, 2010 Rise Set
Actual Time 6:47 AM PDT 7:22 PM PDT
Civil Twilight 6:20 AM PDT 7:48 PM PDT
Nautical Twilight 5:49 AM PDT 8:19 PM PDT
Astronomical Twilight 5:18 AM PDT 8:51 PM PDT
Moon 10:46 AM PDT (9/11) 9:10 PM PDT (9/11)
Length of Visible Light 13h 27m
Length of Day
12h 35m
Waxing Crescent, 16% of the Moon is Illuminated
Sep 11
Waxing Crescent
Sep 14
First Quarter
Sep 23
Full
Sep 30
Last Quarter
Oct 7
New

Weather History Calendar

Precipitation Actual month total 0.00 Average Month Total: 0.17
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Clear
Actual:
- | - 0.00
Average:
78 | 53 0.00
Clear
Actual:
- | - 0.00
Average:
79 | 53 0.00
Scattered Clouds
Actual:
- | - 0.00
Average:
79 | 53 0.00
Scattered Clouds
Actual:
- | - 0.00
Average:
78 | 54 0.00
Scattered Clouds
Actual:
- | - 0.00
Average:
80 | 54 0.00
Clear
Actual:
- | - 0.00
Average:
78 | 54 0.00
Scattered Clouds
Actual:
- | - 0.00
Average:
79 | 54 0.00
Mostly Cloudy
Actual:
- | - 0.00
Average:
80 | 53 0.00
Scattered Clouds
Actual:
- | - 0.00
Average:
79 | 53 0.00
Clear
Actual:
- | - 0.00
Average:
77 | 53 0.00
Clear
Actual:
- | - 0.00
Average:
78 | 52 0.00
Scattered Clouds
Actual:
- | - 0.00
Average:
78 | 52 0.00
Partly Cloudy
Actual:
- | - 0.00
Average:
78 | 52 0.00
Scattered Clouds
Actual:
- | - 0.00
Average:
77 | 52 0.01
Partly Cloudy
Actual:
- | - 0.00
Average:
76 | 52 0.01
Scattered Clouds
Actual:
- | - 0.00
Average:
76 | 52 0.01
Partly Cloudy
Actual:
- | - 0.00
Average:
76 | 53 0.01
Partly Cloudy
Actual:
- | - 0.00
Average:
76 | 53 0.01
Partly Cloudy
Actual:
- | - 0.00
Average:
76 | 52 0.01
Scattered Clouds
Actual:
- | - 0.00
Average:
76 | 50 0.01
Partly Cloudy
Actual:
69 | 60 0.00
Average:
78 | 50 0.01
Scattered Clouds
Actual:
69 | 55 0.00
Average:
78 | 51 0.01
Scattered Clouds
Actual:
77 | 46 0.00
Average:
77 | 51 0.01
Clear
Actual:
87 | 51 0.00
Average:
77 | 51 0.01
Clear
Actual:
89 | 53 0.00
Average:
79 | 52 0.01
Clear
Actual:
84 | 57 0.00
Average:
77 | 52 0.01
Clear
Actual:
89 | 57 0.00
Average:
77 | 52 0.01
Scattered Clouds
Actual:
93 | 62 0.00
Average:
77 | 52 0.01
Scattered Clouds
Actual:
84 | 60 0.00
Average:
77 | 52 0.01
Scattered Clouds
Actual:
75 | 55 0.00
Average:
78 | 51 0.01
 

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

2010 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 - - - - - - - - - 29.94 29.88 29.79 20 20 20 15 6 - 0.00  
2 - - - - - - - - - 29.88 29.84 29.81 - - - 20 8 - 0.00  
3 - - - - - - - - - 29.99 29.95 29.91 12 11 10 20 8 17 0.00  
4 - - - - - - - - - 29.99 29.93 29.87 20 14 7 18 9 - 0.00  
5 - - - - - - - - - 29.89 29.83 29.75 15 9 6 16 7 - 0.00  
6 - - - - - - - - - 29.79 29.74 29.70 20 17 10 17 8 - 0.00  
7 - - - - - - - - - 29.86 29.83 29.79 15 12 10 17 10 28 0.00  
8 - - - - - - - - - 29.90 29.89 29.87 20 15 13 17 10 - 0.00  
9 - - - - - - - - - 30.00 29.97 29.93 20 18 15 16 9 - 0.00  
10 - - - - - - - - - 30.02 29.98 29.93 20 14 10 15 7 - 0.00  
11 - - - - - - - - - 29.99 29.94 29.89 - - - 17 7 - 0.00  
12 - - - - - - - - - 30.01 29.98 29.94 15 11 7 17 8 - 0.00  
13 - - - - - - - - - 30.02 29.97 29.93 15 8 7 17 9 - 0.00  
14 - - - - - - - - - 30.04 29.99 29.95 20 14 10 14 8 - 0.00  
15 - - - - - - - - - 30.06 30.03 30.01 20 13 8 18 9 - 0.00  
16 - - - - - - - - - 30.02 29.97 29.90 20 18 15 17 10 23 0.00  
17 - - - - - - - - - 29.95 29.92 29.90 15 12 10 18 10 - 0.00  
18 - - - - - - - - - 29.97 29.94 29.92 20 15 10 17 8 - 0.00  
19 - - - - - - - - - 29.96 29.94 29.91 20 19 15 17 10 23 0.00  
20 - - - - - - - - - 29.92 29.85 29.78 20 20 20 17 9 - 0.00  
21 69 64 60 52 50 48 63 57 49 29.84 29.81 29.78 20 15 7 17 10 23 0.00  
22 69 62 55 52 49 46 82 60 49 29.92 29.86 29.80 20 15 10 15 9 21 0.00  
23 77 62 46 57 52 45 93 66 47 30.02 29.98 29.93 15 15 15 16 7 - 0.00  
24 87 69 51 63 55 46 82 59 33 30.08 30.03 29.99 - - - 17 7 - 0.00  
25 89 71 53 63 56 50 88 57 27 30.04 29.96 29.89 - - - 15 5 - 0.00  
26 84 70 57 63 59 52 82 64 37 29.98 29.91 29.85 15 15 15 14 6 - 0.00  
27 89 73 57 66 60 50 78 58 36 29.90 29.83 29.78 - - - 12 5 - 0.00  
28 93 78 62 63 59 55 77 50 28 29.88 29.82 29.77 20 20 20 9 5 - 0.00  
29 84 72 60 64 59 55 82 60 40 29.80 29.75 29.70 - - - 14 7 - 0.00  
30 75 65 55 61 59 54 94 78 61 29.88 29.81 29.78 15 15 15 17 9 - 0.00