Weather History for Ontario, CA

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Month of December, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 84 °F 70 °F 51 °F
Mean Temperature 68 °F 57 °F 45 °F
Min Temperature 54 °F 43 °F 31 °F
Degree Days  
Heating Degree Days (base 65) 20 8 0 261
Cooling Degree Days (base 65) 3 0 0 4
Growing Degree Days (base 50) 18 7 0 224
Dew Point  
Dew Point 52 °F 29 °F -4 °F
Precipitation  
Precipitation 0.12 in 0.01 in 0.00 in 0.24 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 36 mph 4 mph 0 mph
Gust Wind 49 mph 28 mph 21 mph
Sea Level Pressure  
Sea Level Pressure 30.32 in 30.08 in 29.70 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 16, 2013 Rise Set
Actual Time 6:49 AM PST 4:43 PM PST
Civil Twilight 6:21 AM PST 5:10 PM PST
Nautical Twilight 5:50 AM PST 5:42 PM PST
Astronomical Twilight 5:19 AM PST 6:12 PM PST
Moon 4:34 PM PST (12/16) 6:04 AM PST (12/16)
Length of Visible Light 10h 49m
Length of Day
9h 53m
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 0.24 Normal Month Total: 2.32
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Partly Cloudy
Actual:
79 | 48 0.00
Average:
68 | 43 0.03
Partly Cloudy
Actual:
74 | 48 0.00
Average:
67 | 43 0.04
Partly Cloudy
Actual:
65 | 44 0.00
Average:
67 | 43 0.04
Partly Cloudy
Actual:
61 | 48 0.00
Average:
67 | 43 0.04
Scattered Clouds
Actual:
57 | 41 0.00
Average:
67 | 43 0.04
Partly Cloudy
Actual:
56 | 43 0.00
Average:
66 | 43 0.05
Rain
Actual:
51 | 41 0.12
Average:
66 | 43 0.04
Partly Cloudy
Actual:
54 | 36 0.00
Average:
66 | 43 0.05
Scattered Clouds
Actual:
60 | 35 0.00
Average:
66 | 43 0.04
Partly Cloudy
Actual:
66 | 31 0.00
Average:
66 | 43 0.03
Scattered Clouds
Actual:
72 | 35 0.00
Average:
66 | 43 0.04
Partly Cloudy
Actual:
69 | 43 0.00
Average:
66 | 42 0.04
Clear
Actual:
66 | 40 0.00
Average:
65 | 42 0.04
Clear
Actual:
75 | 42 0.00
Average:
65 | 42 0.05
Partly Cloudy
Actual:
81 | 42 0.00
Average:
65 | 42 0.06
Partly Cloudy
Actual:
84 | 48 0.00
Average:
65 | 42 0.05
Partly Cloudy
Actual:
84 | 52 0.00
Average:
65 | 42 0.07
Partly Cloudy
Actual:
72 | 54 0.00
Average:
65 | 42 0.07
Rain
Actual:
56 | 49 0.12
Average:
65 | 42 0.07
Fog
Actual:
61 | 39 0.00
Average:
65 | 43 0.07
Scattered Clouds
Actual:
59 | 40 0.00
Average:
65 | 43 0.08
Clear
Actual:
69 | 40 0.00
Average:
65 | 43 0.07
Clear
Actual:
74 | 43 0.00
Average:
65 | 43 0.07
Clear
Actual:
78 | 43 0.00
Average:
65 | 43 0.08
Scattered Clouds
Actual:
82 | 46 0.00
Average:
65 | 43 0.09
Clear
Actual:
82 | 42 0.00
Average:
65 | 43 0.12
Partly Cloudy
Actual:
81 | 43 0.00
Average:
65 | 43 0.15
Scattered Clouds
Actual:
75 | 50 0.00
Average:
65 | 43 0.18
Clear
Actual:
75 | 46 0.00
Average:
65 | 43 0.18
Scattered Clouds
Actual:
73 | 41 0.00
Average:
65 | 43 0.18
Scattered Clouds
Actual:
73 | 42 0.00
Average:
65 | 43 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 79 64 48 44 34 23 77 45 12 30.21 30.15 30.09 10 10 10 8 4 - 0.00  
2 74 61 48 36 31 23 50 33 15 30.11 30.01 29.91 10 10 10 9 2 10 0.00  
3 65 55 44 52 43 34 61 52 42 29.89 29.80 29.74 10 10 10 16 4 20 0.00  
4 61 55 48 42 32 16 71 45 19 29.96 29.88 29.76 10 10 10 15 6 21 0.00  
5 57 49 41 36 33 24 70 50 30 30.10 30.01 29.95 10 10 10 10 2 14 0.00  
6 56 50 43 37 35 33 70 58 46 30.18 30.12 30.08 10 10 10 10 2 14 0.00  
7 51 46 41 47 40 36 93 82 70 30.11 30.06 29.98 10 9 3 12 2 15 0.12 Rain
8 54 45 36 39 35 27 92 69 46 30.20 30.14 30.09 10 10 9 10 2 13 0.00  
9 60 48 35 32 19 -4 82 45 8 30.29 30.24 30.19 10 10 9 36 8 47 0.00  
10 66 49 31 23 13 2 48 28 8 30.24 30.17 30.09 10 10 10 8 3 10 0.00  
11 72 54 35 22 17 11 52 32 11 30.18 30.14 30.10 10 10 10 7 3 8 0.00  
12 69 56 43 36 26 16 42 27 12 30.21 30.16 30.12 10 10 10 13 4 16 0.00  
13 66 53 40 36 33 28 76 50 24 30.22 30.18 30.12 10 10 8 8 2 10 0.00  
14 75 59 42 32 23 15 56 34 12 30.28 30.22 30.17 10 10 10 14 5 18 0.00  
15 81 62 42 27 22 16 49 29 9 30.23 30.16 30.08 10 10 10 9 3 9 0.00  
16 84 66 48 34 28 21 42 27 11 30.14 30.09 30.04 10 10 10 8 2 9 0.00  
17 84 68 52 40 33 25 45 29 12 30.11 30.05 29.97 10 10 10 10 3 14 0.00  
18 72 63 54 51 41 35 47 38 28 29.99 29.90 29.83 10 9 7 14 5 17 0.00  
19 56 53 49 48 44 42 86 74 61 29.83 29.77 29.70 10 9 5 14 6 16 0.12 Rain
20 61 50 39 46 41 37 93 68 42 29.94 29.84 29.77 10 10 6 12 4 15 0.00 Fog
21 59 50 40 43 41 38 93 73 53 30.09 29.99 29.92 10 8 5 7 1 12 0.00  
22 69 55 40 44 40 36 92 61 30 30.26 30.18 30.09 10 7 2 6 1 7 0.00  
23 74 59 43 40 36 31 71 46 20 30.32 30.25 30.19 10 10 9 8 2 10 0.00  
24 78 61 43 37 33 25 65 41 17 30.19 30.14 30.08 10 10 10 10 4 14 0.00  
25 82 64 46 31 21 0 41 23 4 30.19 30.14 30.09 10 10 10 23 6 31 0.00  
26 82 62 42 24 14 -1 49 28 6 30.17 30.12 30.05 10 10 10 23 5 30 0.00  
27 81 62 43 23 16 5 37 22 6 30.15 30.10 30.04 10 10 10 9 4 20 0.00  
28 75 63 50 42 27 13 38 24 9 30.02 29.97 29.90 10 10 10 9 2 13 0.00  
29 75 61 46 39 15 -1 71 39 7 30.13 30.04 29.97 10 10 9 35 13 49 0.00  
30 73 57 41 21 15 3 37 22 7 30.26 30.20 30.15 10 10 10 9 2 9 0.00  
31 73 58 42 34 23 8 52 31 9 30.20 30.13 30.06 10 10 7 7 2 9 0.00