Weather History for Portland, OR

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Month of December, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 57 °F 42 °F 28 °F
Mean Temperature 53 °F 37 °F 20 °F
Min Temperature 48 °F 31 °F 12 °F
Degree Days  
Heating Degree Days (base 65) 45 28 12 880
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 1 0 0 1
Dew Point  
Dew Point 52 °F 32 °F -2 °F
Precipitation  
Precipitation 0.85 in 0.06 in 0.00 in 1.62 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 33 mph 5 mph 0 mph
Gust Wind 41 mph 24 mph 18 mph
Sea Level Pressure  
Sea Level Pressure 30.64 in 30.32 in 29.90 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 16, 2013 Rise Set
Actual Time 7:45 AM PST 4:27 PM PST
Civil Twilight 7:10 AM PST 5:01 PM PST
Nautical Twilight 6:33 AM PST 5:39 PM PST
Astronomical Twilight 5:56 AM PST 6:15 PM PST
Moon 4:25 PM PST (12/16) 6:55 AM PST (12/16)
Length of Visible Light 9h 51m
Length of Day
8h 42m
Full, 100% of the Moon is Illuminated
Dec 16
Full
Dec 17
Full
Dec 25
Last Quarter
Jan 1
New
Jan 7
First Quarter

Weather History Calendar

Precipitation Actual month total 1.62 Normal Month Total: 5.49
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Rain
Actual:
57 | 48 0.85
Average:
48 | 37 0.21
Rain
Actual:
53 | 33 0.04
Average:
48 | 37 0.20
Rain
Actual:
43 | 27 0.01
Average:
48 | 37 0.20
Fog
Actual:
38 | 22 0.00
Average:
47 | 37 0.20
Partly Cloudy
Actual:
32 | 19 0.00
Average:
47 | 36 0.19
Snow
Actual:
30 | 24 0.01
Average:
47 | 36 0.19
Scattered Clouds
Actual:
30 | 15 0.00
Average:
47 | 36 0.19
Scattered Clouds
Actual:
28 | 12 0.00
Average:
46 | 36 0.18
Partly Cloudy
Actual:
29 | 14 T
Average:
46 | 36 0.18
Snow
Actual:
34 | 27 T
Average:
46 | 35 0.18
Fog
Actual:
41 | 27 T
Average:
46 | 35 0.17
Rain
Actual:
39 | 25 0.13
Average:
46 | 35 0.18
Rain
Actual:
45 | 36 0.03
Average:
46 | 35 0.17
Fog
Actual:
42 | 38 0.00
Average:
45 | 35 0.18
Rain
Actual:
46 | 39 0.02
Average:
45 | 35 0.18
Fog
Actual:
43 | 40 0.00
Average:
45 | 35 0.17
Fog
Actual:
40 | 36 T
Average:
45 | 35 0.17
Rain
Actual:
43 | 30 0.06
Average:
45 | 35 0.18
Partly Cloudy
Actual:
37 | 28 0.00
Average:
45 | 35 0.17
Snow
Actual:
46 | 33 0.06
Average:
45 | 35 0.18
Rain
Actual:
53 | 41 0.07
Average:
45 | 35 0.17
Rain
Actual:
53 | 45 0.05
Average:
45 | 35 0.17
Rain
Actual:
51 | 34 0.28
Average:
45 | 35 0.17
Fog
Actual:
39 | 30 0.00
Average:
45 | 35 0.17
Fog
Actual:
42 | 34 0.00
Average:
45 | 35 0.17
Fog
Actual:
43 | 33 0.00
Average:
45 | 35 0.17
Fog
Actual:
39 | 32 T
Average:
45 | 35 0.16
Mostly Cloudy
Actual:
45 | 37 0.00
Average:
45 | 35 0.17
Overcast
Actual:
40 | 34 0.00
Average:
45 | 35 0.16
Rain
Actual:
42 | 35 T
Average:
45 | 35 0.15
Rain
Actual:
47 | 37 0.01
Average:
45 | 35 0.16
 

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
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 57 53 48 52 50 46 100 90 80 30.20 30.04 29.93 10 8 2 26 15 37 0.85 Rain
2 53 43 33 47 36 32 92 77 62 30.07 30.00 29.92 10 10 9 20 9 35 0.04 Rain
3 43 35 27 36 29 17 92 66 39 30.32 30.18 30.08 10 10 7 22 6 27 0.01 Rain
4 38 30 22 26 19 11 100 66 32 30.36 30.33 30.31 10 6 0 17 7 23 0.00 Fog
5 32 26 19 19 15 10 84 65 46 30.33 30.27 30.19 10 10 10 23 6 28 0.00  
6 30 27 24 20 14 6 81 62 42 30.17 30.10 30.01 10 7 0 33 22 41 0.01 Snow
7 30 23 15 7 3 -2 56 42 27 30.47 30.33 30.14 10 10 10 24 12 30 0.00  
8 28 20 12 14 10 6 80 61 42 30.63 30.54 30.46 10 10 10 12 4 13 0.00  
9 29 22 14 23 16 12 88 69 50 30.64 30.60 30.56 10 10 8 9 3 10 T  
10 34 31 27 30 25 19 92 78 64 30.57 30.49 30.43 10 5 0 8 3 9 T Fog , Snow
11 41 34 27 32 29 25 100 85 69 30.42 30.34 30.22 10 3 0 14 3 17 T Fog
12 39 32 25 35 30 23 92 76 59 30.24 30.19 30.14 10 7 3 20 8 23 0.13 Rain
13 45 41 36 42 40 35 100 95 89 30.45 30.40 30.24 10 3 0 12 3 14 0.03 Fog , Rain
14 42 40 38 41 39 38 100 93 86 30.48 30.45 30.40 7 2 0 12 3 13 0.00 Fog
15 46 43 39 43 40 37 100 95 89 30.50 30.47 30.44 10 6 0 9 3 10 0.02 Rain
16 43 42 40 42 41 40 100 97 93 30.49 30.40 30.27 10 1 0 10 3 12 0.00 Fog
17 40 38 36 40 37 35 100 93 85 30.27 30.23 30.21 3 2 0 10 4 12 T Fog
18 43 37 30 40 36 29 100 91 82 30.19 30.13 30.08 10 6 1 14 2 17 0.06 Rain
19 37 33 28 32 30 27 100 88 76 30.35 30.28 30.16 10 8 5 8 2 9 0.00  
20 46 40 33 43 34 31 96 91 86 30.24 30.06 29.90 10 6 2 15 7 20 0.06 Rain , Snow
21 53 47 41 46 43 40 100 87 74 30.25 30.12 29.95 10 7 0 8 2 9 0.07 Rain
22 53 49 45 47 46 44 100 89 77 30.36 30.32 30.24 10 10 4 10 5 12 0.05 Rain
23 51 43 34 49 44 34 100 88 76 30.56 30.38 30.30 10 9 2 21 7 25 0.28 Rain
24 39 35 30 38 35 30 100 96 92 30.64 30.59 30.52 4 0 0 8 3 10 0.00 Fog
25 42 38 34 36 35 34 100 88 76 30.51 30.46 30.42 10 3 0 7 2 10 0.00 Fog
26 43 38 33 36 34 32 100 85 70 30.42 30.34 30.25 10 3 0 6 1 8 0.00 Fog
27 39 36 32 35 33 31 96 91 85 30.42 30.30 30.23 10 7 0 9 2 11 T Fog
28 45 41 37 38 36 35 92 81 70 30.52 30.48 30.42 10 8 6 8 2 10 0.00  
29 40 37 34 36 35 33 100 93 85 30.48 30.41 30.32 10 9 6 10 3 12 0.00  
30 42 39 35 38 36 35 100 90 79 30.30 30.25 30.21 10 6 1 12 3 14 T Rain
31 47 42 37 43 40 37 100 88 76 30.37 30.32 30.26 9 6 0 8 3 10 0.01 Fog , Rain