CmfThirdPartyHeader - SFGate

Castro Valley, California

current conditions

55°
Haze
Feels Like:  55°
Humidity: 65%
Wind/Dir: 0 Mph / NNE
Visibility: 5.0 Miles
Clouds: CLR at -999ft
Sunrise: 7:16 AM
Sunset: 4:50 PM
Barometer: 30.22
Dewpoint: 44° F
UV: 2
Updated:9:58 AM PST on December 15, 2017

next 36 hours

Today
Partly Cloudy
Temp: 60° Humidity: 87% Precip: 0% Wind: 10 mph
Tonight
Partly Cloudy
Temp: 42° Humidity: 49% Precip: 0% Wind: 5 mph
Saturday
Clear
Temp: 63° Humidity: 86% Precip: 0% Wind: 25 mph
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Friday, 15
60 | 42 °F
Partly Cloudy
Chance of
Precipitation
0%
Saturday, 16
63 | 45 °F
Clear
Chance of
Precipitation
0%
Sunday, 17
65 | 42 °F
Clear
Chance of
Precipitation
0%
Monday, 18
63 | 41 °F
Partly Cloudy
Chance of
Precipitation
0%
Tuesday, 19
62 | 44 °F
Partly Cloudy
Chance of
Precipitation
0%
Wednesday, 20
59 | 41 °F
Partly Cloudy
Chance of
Precipitation
20%
Thursday, 21
59 | 40 °F
Clear
Chance of
Precipitation
0%
Friday, 22
61 | 39 °F
Clear
Chance of
Precipitation
0%
Friday
partlycloudy Sunshine and clouds mixed. High near 60F. Winds light and variable.
Friday Night
nt_partlycloudy Some clouds this evening will give way to mainly clear skies overnight. Low 42F. Winds NW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 43 | 38 58 | 40 54 | 45 47 | 43
Wind 3 mph NNW 3 mph W 3 mph WSW 6 mph NW
Humidity 80% 51% 73% 86%
Chance of Precip. 0% 0% 0% 10%
Cloud Cover % 68% 69% 15%
Conditions Mostly Cloudy Mostly Cloudy Clear
Sunrise & Sunset
7:16 AM
4:50 PM
Source: Weather Underground BestForecast  
Saturday
clear A mainly sunny sky. High 63F. Winds N at 15 to 25 mph. Winds could occasionally gust over 40 mph.
Saturday Night
nt_clear Clear skies. Low around 45F. Winds NNE at 10 to 20 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 44 | 36 60 | 26 57 | 22 50 | 24
Wind 7 mph NNW 17 mph N 12 mph N 12 mph NNE
Humidity 74% 27% 25% 36%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 2% 12% 10% 2%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
7:17 AM
4:51 PM
Source: Weather Underground BestForecast  
Sunday
clear Sunny. High near 65F. Winds NNE at 5 to 10 mph.
Sunday Night
nt_clear Partly cloudy. Low 42F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 46 | 25 61 | 25 55 | 30 46 | 28
Wind 6 mph NNE 7 mph N 3 mph NE 3 mph E
Humidity 44% 25% 38% 50%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 2% 0% 3% 4%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
7:17 AM
4:51 PM
Source: Weather Underground BestForecast  
Monday
partlycloudy Partly cloudy skies. High 63F. Winds light and variable.
Monday Night
nt_clear A mostly clear sky. Low 41F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 43 | 27 59 | 32 54 | 35 46 | 30
Wind 2 mph ENE 2 mph WSW 2 mph NE 3 mph E
Humidity 53% 37% 48% 54%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 50% 7% 4% 10%
Conditions Partly Cloudy Clear Clear Clear
Sunrise & Sunset
7:18 AM
4:51 PM
Source: Weather Underground BestForecast  
Tuesday
partlycloudy Sunshine and clouds mixed. High 62F. Winds light and variable.
Tuesday Night
nt_mostlycloudy Mostly cloudy. Low 44F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 42 | 30 59 | 33 55 | 43 50 | 43
Wind 2 mph ENE 2 mph WSW 2 mph WNW 4 mph SSW
Humidity 63% 38% 64% 77%
Chance of Precip. 0% 0% 0% 10%
Cloud Cover 23% 40% 63% 69%
Conditions Clear Partly Cloudy Mostly Cloudy Mostly Cloudy
Sunrise & Sunset
7:18 AM
4:52 PM
Source: Weather Underground BestForecast  
Wednesday
partlycloudy Some clouds in the morning will give way to mainly sunny skies for the afternoon. High 59F. Winds NW at 5 to 10 mph.
Wednesday Night
nt_clear Clear skies. Low 41F. Winds N at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 46 | 41 55 | 37 53 | 32 46 | 28
Wind 3 mph W 8 mph WNW 5 mph NNW 6 mph NNE
Humidity 83% 50% 45% 51%
Chance of Precip. 20% 0% 0% 0%
Cloud Cover 44% 19% 6% 5%
Conditions Partly Cloudy Clear Clear Clear
Sunrise & Sunset
7:18 AM
4:52 PM
Source: Weather Underground BestForecast  
Thursday
clear Sunny skies. High 59F. Winds NNE at 10 to 15 mph.
Thursday Night
nt_clear Clear. Low around 40F. Winds NE at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 42 | 26 55 | 24 53 | 27 45 | 24
Wind 5 mph NNE 9 mph N 7 mph NNE 6 mph NE
Humidity 53% 31% 36% 43%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 3% 2% 3% 7%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
7:18 AM
4:52 PM
Source: Weather Underground BestForecast  
Friday
clear A mainly sunny sky. High 61F. Winds N at 5 to 10 mph.
Friday Night
nt_clear Mostly clear. Low 39F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 40 | 23 56 | 26 53 | 29 45 | 26
Wind 4 mph ENE 6 mph N 3 mph N 4 mph ENE
Humidity 49% 32% 39% 47%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 13% 8% 10% 16%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
7:18 AM
4:52 PM
Source: Weather Underground BestForecast  
Saturday
partlycloudy Partly cloudy. High around 60F. Winds light and variable.
Saturday Night
nt_partlycloudy A few clouds. Low near 40F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 40 | 27 56 | 32 53 | 32 44 | 28
Wind 3 mph ENE 4 mph N 3 mph NNE 5 mph NE
Humidity 60% 39% 44% 53%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 25% 37% 31% 31%
Conditions Clear Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
7:18 AM
4:52 PM
Source: Weather Underground BestForecast  
Sunday
clear Sunny skies. High 61F. Winds light and variable.
Sunday Night
nt_clear Mostly clear skies. Low 39F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 41 | 29 57 | 34 53 | 36 44 | 33
Wind 4 mph ENE 5 mph NNE 3 mph NE 4 mph ENE
Humidity 62% 42% 52% 64%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 26% 18% 17% 26%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
7:18 AM
4:52 PM
Source: Weather Underground BestForecast  
Monday
partlycloudy Partly cloudy. High 62F. Winds light and variable.
Monday Night
nt_partlycloudy A few clouds from time to time. Low around 40F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 40 | 31 56 | 34 53 | 36 44 | 33
Wind 3 mph ENE 5 mph NE 2 mph NNE 4 mph E
Humidity 72% 44% 52% 64%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 27% 31% 36% 35%
Conditions Clear Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
7:18 AM
4:52 PM
Source: Weather Underground BestForecast  
Tuesday
clear A few clouds from time to time. High near 60F. Winds light and variable.
Tuesday Night
nt_clear Mostly clear skies. Low around 40F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 41 | 32 56 | 36 54 | 38 45 | 34
Wind 3 mph E 5 mph NE 2 mph NE 3 mph E
Humidity 71% 47% 55% 66%
Chance of Precip. 20% 20% 10% 20%
Cloud Cover 24% 23% 24% 23%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
7:18 AM
4:52 PM
Source: Weather Underground BestForecast  
Wednesday
clear A few clouds early, otherwise mostly sunny. High 61F. Winds light and variable.
Wednesday Night
nt_clear Mostly clear skies. Low around 40F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 41 | 32 56 | 37 53 | 38 44 | 34
Wind 3 mph E 5 mph NE 2 mph NE 3 mph E
Humidity 71% 48% 55% 67%
Chance of Precip. 20% 10% 10% 0%
Cloud Cover 26% 30% 25% 23%
Conditions Clear Partly Cloudy Clear Clear
Sunrise & Sunset
7:18 AM
4:52 PM
Source: Weather Underground BestForecast  
Thursday
clear Mostly sunny skies. High near 60F. Winds light and variable.
Thursday Night
nt_clear Mainly clear. Low 41F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 40 | 33 56 | 38 53 | 38 45 | 34
Wind 3 mph ESE 4 mph ESE 0 mph E 3 mph ESE
Humidity 75% 51% 57% 66%
Chance of Precip. 20% 10% 10% 10%
Cloud Cover 25% 25% 24% 21%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
7:18 AM
4:52 PM
Source: Weather Underground BestForecast  
Friday
clear Mostly sunny skies. High near 60F. Winds light and variable.
Friday Night
nt_chancerain A shower or two around the area in the evening, then partly cloudy overnight. Low 43F. Winds light and variable. Chance of rain 30%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 42 | 33 56 | 37 54 | 38 48 | 36
Wind 3 mph ESE 5 mph SE 1 mph ESE 2 mph ESE
Humidity 71% 49% 55% 64%
Chance of Precip. 20% 20% 20% 20%
Cloud Cover 19% 23% 26% 27%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
7:18 AM
4:52 PM
Source: Weather Underground BestForecast  

History & Almanac

Today
Min Temp
Max Temp
Normal
42°F
57°F
Record
35°F
68°F
Year
1998

astronomy

December 15, 2017
Rise
Set
Actual Time
07:16 AM (PST)
04:50 PM (PST)
Moon
05:41 AM (PST)
04:10 PM (PST)
Length of Visible Light
10h 33m
Length of Day
9h 34m
Length of Day Percent
39.86%

Moon Phases

Today
Waning Crescent
Dec. 18 New
Dec. 26 First Quarter
Jan. 02 Full
Jan. 08 Last Quarter

Air Quality

  • Current
  • Moderate
  • PM2.5
  • Current
  • Good
  • OZONE
  • Friday
  • Moderate
  • PM2.5
  • Saturday
  • Good
  • PM2.5
  • Sunday
  • Good
  • PM2.5
  • Monday
  • Good
  • PM2.5
  • Tuesday
  • Moderate
  • PM2.5