Hetch Hetchy Reservoir, CA Weather Forecast and Current Conditions

Current Conditions From Nearby Station

50°F
Feels Like 50°F  
Humidity 35% Dew Point 23°F Wind Calm Barometer N/A
Solar Rad 56 w/m2
Report from a MADIS/MESONET weather station 6.9 mi. SE of central Hetch Hetchy Reservoir
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Point Forecast at a Glance

MonDec 15
Mon Dec 15: Mostly Clear, Low 45F
 
45
TueDec 16
Tue Dec 16: Mostly Sunny, High 67F, Low 45F
67
45
WedDec 17
Wed Dec 17: Rain, High 64F, Low 46F
50%
64
46
ThuDec 18
Thu Dec 18: Mostly Sunny, High 65F, Low 46F
65
46
FriDec 19
Fri Dec 19: Rain, High 62F, Low 48F
30%
62
48
SatDec 20
Sat Dec 20: Rain Likely, High 57F, Low 46F
70%
57
46
SunDec 21
Sun Dec 21: Rain Likely, High 54F, Low 46F
70%
54
46

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7-Day Temperature Trend

Week Ahead Summary

Cooling trend continues with high temperatures dropping from 67°F to 54°F. Unsettled weather expected with rain likely on at least 5 days.

Climate Context

This week's forecast shows temperatures running 16°F above the historical average for December. Normal highs for this period are around 45°F with lows around 25°F.

This Date in Weather History

1901 - An intense cold front swept across the eastern U.S. The cold front produced heavy rain in Louisiana, and heavy snow in the northeastern U.S.

More on this and other weather history

Hetch Hetchy Reservoir, CA 7 Day Weather Forecast Details

Monday Dec 15

Mostly Clear

Night: Mostly clear, with a low around 45. East wind around 5 mph becoming calm in the evening.

Tuesday Dec 16

Mostly Sunny

Day: Mostly sunny, with a high near 67. Calm wind becoming west around 5 mph in the afternoon.

Rain

Night: A 40 percent chance of rain after 10pm. Increasing clouds, with a low around 45. Calm wind.

Wednesday Dec 17

Rain

Day: A 50 percent chance of rain. Mostly cloudy, then gradually becoming sunny, with a high near 64. West wind around 5 mph. New precipitation amounts of less than a tenth of an inch possible.

Mostly Clear

Night: Mostly clear, with a low around 46. East northeast wind around 5 mph becoming calm.

Thursday Dec 18

Mostly Sunny

Day: Mostly sunny, with a high near 65. Calm wind becoming west southwest around 5 mph in the afternoon.

Partly Cloudy

Night: Partly cloudy, with a low around 46. East wind around 5 mph.

Friday Dec 19

Rain

Day: A 30 percent chance of rain after 10am. Partly sunny, with a high near 62. East southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

Rain Likely

Night: Rain likely. Mostly cloudy, with a low around 48. South southeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Saturday Dec 20

Rain Likely

Day: Rain likely. Mostly cloudy, with a high near 57. Southwest wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

Rain Likely

Night: Rain likely. Mostly cloudy, with a low around 46. Southeast wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

Sunday Dec 21

Rain Likely

Day: Rain likely. Mostly cloudy, with a high near 54. South southwest wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

Rain Likely

Night: Rain likely. Mostly cloudy, with a low around 46. South wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.

Monday Dec 22

Rain

Day: A 50 percent chance of rain. Mostly cloudy, with a high near 56. South wind 5 to 10 mph, with gusts as high as 15 mph. New precipitation amounts between a half and three quarters of an inch possible.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.