Mill Valley September Weather Averages

California, United States of America

September Weather Averages for Mill Valley

High Temp23°C73°F
Low Temp14°C57°F
Avg Temp18°C64°F
Sunshine Hours285 hours 
Rainfall5.41 mm0.21 In
Rain days1 days 
Pressure1013 mb30 In

 

Mill Valley September Averages Year by Year

YearHigh TempLow TempAvg TempSunshine HoursRainfallRain daysPressure
200924°C / 76°F15°C / 59°F19°C / 66°F346 hours4.70 mm / 0.19 In1 days1014 mb / 30 In
201025°C / 77°F13°C / 55°F18°C / 64°F319 hours0.00 mm / 0.00 In0 days1013 mb / 30 In
201123°C / 74°F14°C / 57°F18°C / 64°F332 hours2.40 mm / 0.09 In1 days1014 mb / 30 In
201221°C / 70°F12°C / 53°F16°C / 60°F319 hours0.00 mm / 0.00 In0 days1015 mb / 30 In
201322°C / 72°F14°C / 57°F18°C / 64°F284 hours8.10 mm / 0.32 In1 days1013 mb / 30 In
201423°C / 73°F14°C / 57°F18°C / 64°F312 hours3.30 mm / 0.13 In0 days1012 mb / 30 In
201523°C / 74°F15°C / 59°F19°C / 65°F273 hours2.30 mm / 0.09 In0 days1012 mb / 30 In
201622°C / 71°F13°C / 56°F17°C / 63°F304 hours0.00 mm / 0.00 In0 days1014 mb / 30 In
201724°C / 75°F16°C / 61°F19°C / 67°F278 hours2.22 mm / 0.09 In1 days1013 mb / 30 In
201821°C / 70°F13°C / 55°F16°C / 62°F283 hours0.10 mm / 0.00 In0 days1013 mb / 30 In
201922°C / 72°F15°C / 58°F18°C / 65°F321 hours0.60 mm / 0.02 In0 days1013 mb / 30 In
202024°C / 75°F15°C / 60°F19°C / 66°F352 hours0.00 mm / 0.00 In0 days1014 mb / 30 In
202123°C / 73°F12°C / 54°F17°C / 62°F333 hours0.80 mm / 0.03 In0 days1013 mb / 30 In
202223°C / 74°F14°C / 57°F18°C / 64°F300 hours26.50 mm / 1.04 In2 days1012 mb / 30 In
202321°C / 69°F13°C / 55°F16°C / 61°F238 hours6.34 mm / 0.25 In1 days1014 mb / 30 In
202421°C / 69°F12°C / 54°F16°C / 60°F222 hours0.24 mm / 0.01 In0 days1012 mb / 30 In
202521°C / 70°F14°C / 57°F17°C / 62°F89 hours34.50 mm / 1.36 In2 days1014 mb / 30 In
202625°C / 77°F13°C / 56°F18°C / 65°F234 hours5.30 mm / 0.21 In1 days1013 mb / 30 In

Need more than one day of Mill Valley history?

Download historical weather for Mill Valley, or any other location, in CSV from January 2009 onwards. Ideal for research, insurance, energy, agriculture and machine-learning projects.

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Weather history near Mill Valley

Region

California

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Mill Valley weather history: common questions

How far back does Mill Valley weather history go?

Hourly historical weather is available from 1 January 2009. Choose a date above, or pick a month at the top of the page for long-term averages.

Can I download Mill Valley historical weather as a file?

Yes. Buy historical weather data as daily or hourly CSV, yearly monthly averages or monthly climate averages. A free sample download is available.

Is there an API for historical weather?

Yes. The WeatherAPI.com History API returns hourly weather for any past date from 2010, as JSON or XML. Get a free API key.

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