Weather History for Portland Hillsboro, OR

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 54 °F 46 °F 35 °F
Mean Temperature 50 °F 41 °F 30 °F
Min Temperature 46 °F 36 °F 24 °F
Degree Days  
Heating Degree Days (base 65) 35 24 15 751
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 52 °F 38 °F 24 °F
Precipitation  
Precipitation 0.87 in 0.27 in 0.00 in 7.50 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 32 mph 5 mph 0 mph
Gust Wind 42 mph 24 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.45 in 29.95 in 29.14 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 13, 2012 Rise Set
Actual Time 7:44 AM PST 4:28 PM PST
Civil Twilight 7:09 AM PST 5:02 PM PST
Nautical Twilight 6:32 AM PST 5:40 PM PST
Astronomical Twilight 5:56 AM PST 6:16 PM PST
Moon 7:57 AM PST (12/13) 5:18 PM PST (12/13)
Length of Visible Light 9h 52m
Length of Day
8h 44m
New Moon, 0% of the Moon is Illuminated
Dec 13
New Moon
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New

Weather History Calendar

Precipitation Actual month total 7.50 Normal Month Total: 6.74
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
52 | 46 0.54
Average:
47 | 34 0.19
Rain
Actual:
50 | 44 0.54
Average:
47 | 34 0.21
Rain
Actual:
53 | 46 0.48
Average:
47 | 34 0.19
Rain
Actual:
54 | 46 0.72
Average:
46 | 33 0.20
Snow
Actual:
50 | 33 0.03
Average:
46 | 33 0.19
Rain
Actual:
49 | 36 0.04
Average:
46 | 33 0.21
Rain
Actual:
49 | 39 0.02
Average:
46 | 33 0.20
Rain
Actual:
46 | 36 0.09
Average:
46 | 33 0.22
Rain
Actual:
46 | 40 0.07
Average:
45 | 33 0.21
Fog
Actual:
49 | 44 0.00
Average:
45 | 32 0.21
Rain
Actual:
46 | 37 0.17
Average:
45 | 32 0.21
Rain
Actual:
47 | 35 0.08
Average:
45 | 32 0.21
Rain
Actual:
43 | 35 T
Average:
45 | 32 0.22
Rain
Actual:
45 | 33 0.22
Average:
45 | 32 0.22
Snow
Actual:
39 | 30 0.34
Average:
45 | 32 0.22
Rain
Actual:
49 | 32 0.87
Average:
45 | 32 0.22
Rain
Actual:
48 | 34 0.37
Average:
44 | 32 0.22
Snow
Actual:
40 | 34 0.08
Average:
44 | 32 0.23
Rain
Actual:
47 | 36 0.58
Average:
44 | 31 0.23
Rain
Actual:
47 | 30 0.65
Average:
44 | 31 0.23
Rain
Actual:
46 | 28 0.12
Average:
42 | 31 0.31
Rain
Actual:
46 | 40 0.23
Average:
44 | 31 0.22
Rain
Actual:
43 | 35 0.48
Average:
44 | 31 0.24
Rain
Actual:
44 | 35 0.03
Average:
44 | 31 0.24
Snow
Actual:
41 | 37 0.66
Average:
44 | 31 0.24
Rain
Actual:
44 | 34 0.05
Average:
44 | 31 0.24
Fog
Actual:
42 | 33 0.00
Average:
44 | 32 0.24
Rain
Actual:
43 | 34 0.03
Average:
44 | 32 0.22
Overcast
Actual:
38 | 30 T
Average:
45 | 32 0.21
Snow
Actual:
44 | 24 T
Average:
45 | 32 0.22
Snow
Actual:
35 | 25 0.01
Average:
45 | 32 0.20
 

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 52 49 46 46 45 42 93 82 71 29.73 29.57 29.32 10 9 5 23 12 30 0.54 Rain
2 50 47 44 46 44 40 93 87 80 29.92 29.55 29.27 10 9 3 22 11 28 0.54 Rain
3 53 50 46 46 44 43 93 82 71 30.04 29.94 29.68 10 9 4 18 10 23 0.48 Rain
4 54 50 46 52 48 42 100 90 80 29.97 29.77 29.61 10 6 2 12 5 16 0.72 Rain
5 50 42 33 41 37 34 100 81 61 30.26 30.20 30.00 10 6 0 12 1 14 0.03 Fog , Rain , Snow
6 49 43 36 43 39 36 100 88 76 30.26 30.21 30.16 10 6 0 16 5 22 0.04 Fog , Rain
7 49 44 39 44 41 36 92 81 70 30.24 30.17 30.11 10 10 9 14 7 18 0.02 Rain
8 46 41 36 41 38 35 100 88 76 30.38 30.29 30.23 10 9 6 9 1 12 0.09 Rain
9 46 43 40 45 41 37 100 93 86 30.40 30.37 30.34 10 6 2 8 3 12 0.07 Rain
10 49 47 44 45 44 42 100 90 80 30.45 30.38 30.15 10 6 0 6 1 7 0.00 Fog
11 46 42 37 45 41 36 100 92 83 30.10 29.77 29.63 10 7 0 16 5 22 0.17 Fog , Rain
12 47 41 35 41 38 34 100 88 76 30.03 29.83 29.70 10 4 0 9 1 12 0.08 Fog , Rain
13 43 39 35 39 38 35 100 91 82 30.06 30.00 29.86 10 4 0 8 2 - T Fog , Rain
14 45 39 33 40 36 33 100 91 82 29.99 29.91 29.83 10 6 1 7 1 8 0.22 Rain
15 39 35 30 36 34 30 100 93 85 29.94 29.78 29.62 10 7 1 17 5 25 0.34 Rain , Snow
16 49 41 32 45 39 32 100 93 86 29.85 29.53 29.14 10 7 3 23 9 32 0.87 Rain
17 48 41 34 40 35 31 92 84 76 30.00 29.74 29.20 10 9 5 26 9 37 0.37 Rain
18 40 37 34 35 33 30 96 91 85 30.06 30.01 29.97 10 8 1 15 9 19 0.08 Rain , Snow
19 47 42 36 39 36 33 92 81 70 30.03 29.81 29.60 10 10 8 32 17 42 0.58 Rain
20 47 39 30 39 36 30 100 88 76 29.83 29.74 29.60 10 8 1 25 9 38 0.65 Rain
21 46 37 28 41 35 29 100 93 76 29.80 29.74 29.62 10 6 0 6 1 - 0.12 Fog , Rain
22 46 43 40 39 38 36 100 88 76 29.79 29.63 29.54 10 9 2 23 10 35 0.23 Rain
23 43 39 35 40 37 35 93 85 76 29.91 29.75 29.62 10 8 3 18 6 25 0.48 Rain
24 44 40 35 40 37 34 100 88 76 30.21 30.09 29.92 10 7 1 9 3 11 0.03 Rain
25 41 39 37 39 37 35 100 93 85 30.01 29.77 29.68 10 6 2 16 6 23 0.66 Rain , Snow
26 44 39 34 41 38 33 100 92 83 30.04 29.87 29.71 10 6 1 8 2 9 0.05 Rain
27 42 38 33 38 36 32 100 91 82 30.20 30.14 30.04 10 3 0 7 1 8 0.00 Fog
28 43 39 34 38 35 29 100 85 70 30.18 30.15 30.12 10 8 3 9 2 11 0.03 Rain
29 38 34 30 35 31 28 100 85 70 30.25 30.20 30.16 10 10 7 6 1 8 T  
30 44 34 24 35 30 25 100 77 53 30.33 30.28 30.23 10 5 0 9 3 11 T Fog , Snow
31 35 30 25 32 29 24 100 95 89 30.45 30.33 30.28 10 6 2 9 3 12 0.01 Snow