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San Lorenzo, CA

64°F
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San Lorenzo

California

64°
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San Lorenzo, CA Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities

September

January February March April May June July August September October November December

2026

2025 2026 2027

10-Day

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S
30
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Areas of low clouds, then sun
72°
58°
18
Areas of low clouds, then sun
74°
57°
19
Areas of low clouds, then sun
76°
59°
20
Areas of low clouds; cooler
67°
59°
21
Partly sunny
71°
56°
22
Mostly sunny and nice
77°
58°
23
Plenty of sunshine
80°
58°
24
Clouds yielding to sun
78°
59°
25
Partial sunshine
79°
60°
26
Plenty of sun
78°
61°
27
Times of clouds and sun
80°
58°
28
Partly sunny
78°
57°
29
Mostly sunny
76°
58°
30
More sun than clouds
77°
52°
1
Mostly sunny
78°
57°
2
Times of clouds and sun
72°
58°
3
Times of clouds and sun
78°
56°

Temperature Graph

°F
80° 74° 68° 62° 56° Sep
Today 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

September Weather in San Lorenzo

San Lorenzo's September 2026 forecast shows daily high temperatures ranging from 67° to 80°, with overnight lows between 52° and 61°. The average high for September is 76° with an average low of 58°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in San Lorenzo. See also: October | November | December.

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Weather Near San Lorenzo:

  • Oakland, CA
  • San Francisco, CA
  • San Jose, CA
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