• Tonight

    Apr 20

    Lo 47°

    Becoming cloudy

    Ragweed Pollen Weather
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
    more
  • Tue

    Apr 21

    56°Lo 48°

    Mostly cloudy

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
  • Wed

    Apr 22

    58°Lo 46°

    Low clouds, then some sun

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
    more
  • Thu

    Apr 23

    57°Lo 47°

    Partly sunny

    Low ragweed pollen levels
    • Precip
      25%
    • Wind
      Speed
      18 mph
    • Cloud
      Cover
      28%
    more
  • Fri

    Apr 24

    56°Lo 46°

    Cool with partial sunshine

    Ragweed Pollen Weather
    • Precip
      4%
    • Wind
      Speed
      17 mph
    • Cloud
      Cover
      45%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Temp (°F) 53° 53° 53° 53° 54° 55° 55° 55°
RealFeel® 51° 52° 52° 52° 52° 54° 54° 52°
Humidity 89% 88% 88% 88% 85% 81% 82% 83%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
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0%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 7 SW 8 SW 8 WSW 9 WSW 10 WSW 12 WSW 12 WSW 12 WSW
UV Index 1 1 2 3 3 4 3 2
Cloud Cover 94% 94% 94% 94% 94% 76% 76% 76%
Dew Point 50° 50° 49° 50° 49° 49° 49° 50°
Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 56° 61° N/A 59°
Low 48° 44° N/A 39°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:27 AM with 13:23 of sunlight, then sets at 7:50 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:51 AM with 14:24 of moolight, then sets at 11:15 PM

Half Moon Bay Weather Report

San Francisco: Clouds, Showers to Linger Ahead of Weekend

April 20, 2015; 8:47 PM ET

While cloudy conditions can be expected over the San Francisco area for the next several days, showers will not make a return until the middle of the week. more >

Tue. Pollen

Tue. Dust & Dander

Tue. Wind Maps