Hetch Hetchy Reservoir, CA Weather Forecast and Current Conditions

Current Conditions From Nearby Station

35°F
Feels Like 34°F  
Humidity 67% Dew Point 25°F Wind ENE 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

MonDec 15
Mon Dec 15: Partly Cloudy, Low 45F
 
45
TueDec 16
Tue Dec 16: Mostly Sunny, High 67F, Low 45F
67
45
WedDec 17
Wed Dec 17: Rain Likely, High 64F, Low 47F
60%
64
47
ThuDec 18
Thu Dec 18: Mostly Sunny, High 65F, Low 46F
65
46
FriDec 19
Fri Dec 19: Rain, High 63F, Low 48F
30%
63
48
SatDec 20
Sat Dec 20: Rain Likely, High 58F, Low 48F
70%
58
48
SunDec 21
Sun Dec 21: Rain Likely, High 55F, Low 48F
70%
55
48

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7-Day Temperature Trend

Week Ahead Summary

Cooling trend continues with high temperatures dropping from 67°F to 55°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

1917 - An ice jam closed the Ohio River between Warsaw, KY, and Rising Sun, IN. The thirty foot high ice jam held for 58 days, and backed up the river a distance of 100 miles.

More on this and other weather history

Hetch Hetchy Reservoir, CA 7 Day Weather Forecast Details

Monday Dec 15

Partly Cloudy

Night: Partly cloudy, with a low around 45. Calm wind.

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 45. 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. Mostly cloudy, then gradually becoming sunny, with a high near 64. West wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Mostly Clear

Night: Mostly clear, with a low around 47. 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 southeast wind around 5 mph.

Friday Dec 19

Rain

Day: A 30 percent chance of rain, mainly after 4pm. Mostly sunny, with a high near 63. East southeast wind 5 to 10 mph becoming southwest in the afternoon.

Rain Likely

Night: Rain likely, mainly after 10pm. Mostly cloudy, with a low around 48. Southeast wind around 5 mph. Chance of precipitation is 60%. 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 58. South southeast wind around 5 mph becoming southwest in the afternoon. 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 48. South 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 55. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

Thunderstorms

Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 48. South southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Monday Dec 22

Rain

Day: A 50 percent chance of rain. Mostly cloudy, with a high near 57. South wind 5 to 10 mph, with gusts as high as 15 mph. New precipitation amounts between a quarter and half 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.