Ramona Street in Palo Alto

Weather · September

Palo Alto weather in September

Average highs of 80°F, lows of 53°F and 0.10 in of rain, from 30 years of weather records.

September is Palo Alto’s warmest month, with average highs of 80°F and lows of 53°F. That is 1° warmer than August, and 10° above the yearly average high.

Average high
80°F
Average low
53°F
Precipitation
0.10 in
Wet days
1
Sunrise · sunset
6:50 AM · 7:17 PM

September across the year

  1. 58°39°Jan
  2. 61°41°Feb
  3. 66°44°Mar
  4. 70°45°Apr
  5. 73°50°May
  6. 79°53°Jun
  7. 79°56°Jul
  8. 79°55°Aug
  9. 80°53°Sep
  10. 74°48°Oct
  11. 64°43°Nov
  12. 58°39°Dec

High and low Rain

What to wear in September

  • Warm days: shorts and T-shirts, with a light layer for cooler evenings.

September is good for

What’s on in Palo Alto in September

See all upcoming events and school days off.

Around Palo Alto

Palo Alto Bicycleshop
Palo Alto Bicycleshop (84006247)Oliver Propst · CC BY-SA 3.0
Palo Alto photograph by MARELBU
Palo Alto, CA USA (3)MARELBU · CC BY 3.0
Frank Angell House, 1005 Bryant St., Palo Alto, CA 6-3-2012 2-10-48 PM
Frank Angell House, 1005 Bryant St., Palo Alto, CA 6-3-2012 2-10-48 PMSanfranman59 · CC BY-SA 3.0

See Palo Alto

A look around town before you go.

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Things to do Palo Alto, California

A local activity Short shared by ThingssToDo.

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September compared with the months around it

MonthHighLowRain
August79°F55°F0.00 in
September80°F53°F0.10 in
October74°F48°F0.60 in

Planning a trip? See the best time to visit Palo Alto and today’s forecast.

Questions

How hot does it get in Palo Alto in September?

Average highs are 80°F and average lows 53°F, for a daily mean of 66°F. Individual days run hotter or colder than these 30-year averages.

Does it rain in Palo Alto in September?

September averages 0.10 in of precipitation over about 1 days with at least 0.01 in. It is the 10th wettest month of the year.

What time is sunset in Palo Alto in September?

Around mid-September the sun rises about 6:50 AM and sets about 7:17 PM, for roughly 12.5 hours of daylight.

Is September a good time to visit Palo Alto?

The mildest months for visiting are June, July, August. September is warm, with Halloween events.

NOAA U.S. Climate Normals 1991–2020, Palo Alto station (1 mi from downtown). Sunrise and sunset are calculated for September 15 at the city’s coordinates.

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