Hetch Hetchy Reservoir, CA Weather Forecast and Current Conditions

Current Conditions From Nearby Station

33°F
Feels Like 32°F  
Humidity 66% Dew Point 23°F Wind NE 2 MPH Gusts 3 Barometer N/A
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

SunDec 14
Sun Dec 14: Mostly Clear, Low 48F
 
48
MonDec 15
Mon Dec 15: Sunny, High 69F, Low 51F
69
51
TueDec 16
Tue Dec 16: Mostly Sunny, High 67F, Low 50F
67
50
WedDec 17
Wed Dec 17: Rain Likely, High 59F, Low 47F
60%
59
47
ThuDec 18
Thu Dec 18: Rain, High 64F, Low 46F
20%
64
46
FriDec 19
Fri Dec 19: Rain, High 60F, Low 46F
50%
60
46
SatDec 20
Sat Dec 20: Rain Likely, High 56F, Low 46F
60%
56
46

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7-Day Temperature Trend

Week Ahead Summary

Cooling trend continues with high temperatures dropping from 69°F to 56°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

1987 - A powerful storm spread heavy snow from the Southern High Plains to the Middle Mississippi Valley, and produced severe thunderstorms in the Lower Mississippi Valley. During the evening a tornado hit West Memphis TN killing six persons and injuring two hundred others. The tornado left 1500 persons homeless, and left all of the residents of Crittendon County without electricity. Kansas City MO was blanketed with 10.8 inches of snow, a 24 hour record for December, and snowfall totals in the Oklahoma panhandle ranged up to 14 inches. Strong winds, gusting to 63 mph at Austin TX, ushered arctic cold into the Great Plains, and caused considerable blowing and drifting of snow.

More on this and other weather history

Hetch Hetchy Reservoir, CA 7 Day Weather Forecast Details

Sunday Dec 14

Mostly Clear

Night: Mostly clear, with a low around 48. East wind around 5 mph.

Monday Dec 15

Sunny

Day: Sunny, with a high near 69. East wind around 5 mph becoming calm.

Partly Cloudy

Night: Partly cloudy, with a low around 51. Northeast 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 Likely

Night: Rain likely, mainly after 4am. Mostly cloudy, with a low around 50. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Dec 17

Rain Likely

Day: Rain likely, mainly before 10am. Partly sunny, with a high near 59. West wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Rain

Night: A 20 percent chance of rain before 10pm. Partly cloudy, with a low around 47. East wind around 5 mph becoming calm.

Thursday Dec 18

Rain

Day: A 20 percent chance of rain after 10am. Mostly sunny, with a high near 64. Calm wind becoming west southwest around 5 mph in the afternoon.

Rain

Night: A 20 percent chance of rain. Partly cloudy, with a low around 46. East wind around 5 mph.

Friday Dec 19

Rain

Day: A 50 percent chance of rain, mainly after 10am. Partly sunny, with a high near 60. Southeast wind 5 to 10 mph becoming southwest in the afternoon. New precipitation amounts between a tenth and quarter 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 70%. New precipitation amounts between a quarter and half of an inch possible.

Saturday Dec 20

Rain Likely

Day: Rain likely. Mostly cloudy, with a high near 56. Southwest wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Rain

Night: A 50 percent chance of rain. Mostly cloudy, with a low around 46. East wind around 5 mph. 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. East southeast wind around 5 mph becoming south in the afternoon. Chance of precipitation is 60%. 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.