Weather History for Portland Troutdale, OR

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 59 °F 47 °F 36 °F
Mean Temperature 54 °F 43 °F 35 °F
Min Temperature 48 °F 39 °F 33 °F
Degree Days  
Heating Degree Days (base 65) 30 22 11 680
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 2 0 0 4
Dew Point  
Dew Point 54 °F 37 °F 23 °F
Precipitation  
Precipitation 0.96 in 0.20 in 0.00 in 5.66 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 35 mph 9 mph 0 mph
Gust Wind 51 mph 23 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.44 in 29.95 in 29.16 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 19, 2012 Rise Set
Actual Time 7:46 AM PST 4:28 PM PST
Civil Twilight 7:11 AM PST 5:02 PM PST
Nautical Twilight 6:34 AM PST 5:40 PM PST
Astronomical Twilight 5:57 AM PST 6:16 PM PST
Moon 11:37 AM PST (12/19) No Moon Set
Length of Visible Light 9h 50m
Length of Day
8h 41m
Waxing Crescent, 46% of the Moon is Illuminated
Dec 19
Waxing Crescent
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New

Weather History Calendar

Precipitation Actual month total 5.66 Normal Month Total: 7.17
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
56 | 44 0.00
Average:
47 | 36 0.24
Rain
Actual:
53 | 46 0.04
Average:
47 | 35 0.23
Rain
Actual:
56 | 48 0.13
Average:
47 | 35 0.23
Rain
Actual:
59 | 48 0.96
Average:
47 | 35 0.23
Partly Cloudy
Actual:
52 | 37 0.00
Average:
46 | 35 0.22
Rain
Actual:
50 | 38 T
Average:
46 | 35 0.22
Rain
Actual:
49 | 42 0.09
Average:
46 | 34 0.22
Rain
Actual:
47 | 37 0.11
Average:
45 | 34 0.22
Rain
Actual:
47 | 40 0.12
Average:
45 | 34 0.23
Rain
Actual:
52 | 45 0.01
Average:
45 | 34 0.23
Rain
Actual:
48 | 43 0.12
Average:
45 | 34 0.22
Rain
Actual:
47 | 42 0.09
Average:
45 | 33 0.22
Partly Cloudy
Actual:
47 | 35 0.00
Average:
45 | 33 0.23
Rain
Actual:
44 | 33 0.25
Average:
44 | 33 0.23
Rain
Actual:
42 | 34 0.29
Average:
44 | 33 0.22
Rain
Actual:
52 | 40 0.71
Average:
44 | 33 0.23
Rain
Actual:
50 | 36 0.34
Average:
44 | 33 0.22
Snow
Actual:
42 | 34 0.13
Average:
44 | 33 0.23
Rain
Actual:
42 | 35 0.30
Average:
44 | 33 0.25
Rain
Actual:
45 | 38 0.72
Average:
44 | 33 0.24
Rain
Actual:
45 | 38 0.05
Average:
44 | 32 0.25
Rain
Actual:
52 | 39 0.06
Average:
44 | 32 0.24
Rain
Actual:
42 | 36 0.40
Average:
44 | 32 0.25
Rain
Actual:
46 | 39 0.01
Average:
44 | 32 0.24
Rain
Actual:
42 | 37 0.60
Average:
44 | 32 0.25
Rain
Actual:
42 | 37 0.12
Average:
44 | 32 0.23
Rain
Actual:
48 | 38 T
Average:
44 | 32 0.24
Partly Cloudy
Actual:
42 | 34 0.00
Average:
44 | 32 0.23
Rain
Actual:
41 | 34 0.01
Average:
44 | 32 0.23
Clear
Actual:
42 | 34 0.00
Average:
44 | 32 0.23
Snow
Actual:
36 | 33 T
Average:
44 | 32 0.22
 

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
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 56 50 44 46 44 41 93 76 59 29.74 29.59 29.33 10 10 5 25 8 40 0.00 Rain
2 53 50 46 45 43 41 93 79 64 29.93 29.61 29.28 10 10 7 20 10 31 0.04 Rain
3 56 52 48 45 44 43 86 74 61 30.05 29.95 29.68 10 10 7 21 9 28 0.13 Rain
4 59 54 48 54 49 44 93 87 80 29.96 29.79 29.62 10 6 2 20 6 26 0.96 Rain
5 52 45 37 43 39 35 93 74 54 30.25 30.17 29.99 10 9 1 12 2 15 0.00  
6 50 44 38 43 40 37 92 79 66 30.25 30.20 30.16 10 10 8 21 9 28 T Rain
7 49 46 42 45 41 36 89 83 76 30.23 30.15 30.09 10 9 2 18 9 24 0.09 Rain
8 47 42 37 40 38 36 92 82 71 30.37 30.28 30.22 10 9 2 10 2 15 0.11 Rain
9 47 44 40 45 42 38 100 91 82 30.40 30.37 30.34 10 5 2 10 3 14 0.12 Rain
10 52 49 45 47 45 42 93 85 77 30.42 30.36 30.14 10 8 2 7 1 8 0.01 Rain
11 48 46 43 42 40 38 92 84 76 30.13 29.77 29.62 10 10 6 13 4 18 0.12 Rain
12 47 45 42 41 39 38 89 83 76 30.02 29.87 29.70 10 10 7 16 6 21 0.09 Rain
13 47 41 35 40 37 34 92 79 65 30.05 29.96 29.86 10 10 10 12 4 13 0.00  
14 44 39 33 40 37 32 100 93 85 29.99 29.91 29.84 10 7 1 9 3 12 0.25 Rain
15 42 38 34 36 34 32 96 88 79 29.95 29.80 29.64 10 9 5 23 7 29 0.29 Rain
16 52 46 40 47 39 36 92 84 76 29.84 29.52 29.16 10 8 3 26 10 33 0.71 Rain
17 50 43 36 40 36 31 85 80 74 29.99 29.71 29.22 10 9 2 35 14 51 0.34 Rain
18 42 38 34 35 32 30 89 84 79 30.08 30.03 29.99 10 10 3 17 7 23 0.13 Rain , Snow
19 42 39 35 37 34 32 92 86 79 30.04 29.83 29.63 10 9 4 25 14 33 0.30 Rain
20 45 42 38 40 37 35 92 84 76 29.84 29.72 29.62 10 9 4 20 7 26 0.72 Rain
21 45 42 38 37 36 34 85 78 70 29.79 29.73 29.62 10 10 10 22 16 33 0.05 Rain
22 52 46 39 40 37 35 89 73 56 29.80 29.65 29.55 10 10 9 22 9 29 0.06 Rain
23 42 39 36 38 36 32 89 83 76 29.91 29.75 29.60 10 8 4 21 9 25 0.40 Rain
24 46 43 39 39 37 35 86 81 76 30.20 30.11 29.91 10 10 10 20 7 24 0.01 Rain
25 42 40 37 35 34 33 85 78 70 30.01 29.78 29.69 10 8 5 29 20 35 0.60 Rain
26 42 40 37 38 35 34 92 86 79 30.03 29.86 29.72 10 9 4 24 10 32 0.12 Rain
27 48 43 38 38 37 35 92 79 66 30.19 30.15 30.04 10 10 10 10 2 13 T Rain
28 42 38 34 35 30 26 92 78 64 30.18 30.14 30.11 10 10 10 25 17 32 0.00  
29 41 38 34 34 30 26 92 78 64 30.23 30.19 30.16 10 10 9 22 10 29 0.01 Rain
30 42 38 34 30 27 26 76 68 59 30.31 30.27 30.23 10 10 10 23 15 30 0.00  
31 36 35 33 28 25 23 75 70 64 30.44 30.32 30.27 10 9 2 25 15 31 T Snow