Pasadena September Weather Averages

California, United States of America

September Weather Averages for Pasadena

High Temp	30°C	87°F
Low Temp	19°C	66°F
Avg Temp	24°C	75°F
Sunshine Hours	334 hours
Rainfall	7.80 mm	0.31 In
Rain days	1 days
Pressure	1012 mb	30 In

Pasadena September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2009	32°C / 90°F	18°C / 64°F	24°C / 76°F	353 hours	0.10 mm / 0.00 In	0 days	1013 mb / 30 In
2010	30°C / 87°F	16°C / 61°F	23°C / 73°F	348 hours	0.30 mm / 0.01 In	0 days	1012 mb / 30 In
2011	29°C / 84°F	18°C / 64°F	23°C / 73°F	354 hours	0.90 mm / 0.04 In	0 days	1013 mb / 30 In
2012	31°C / 88°F	19°C / 67°F	25°C / 77°F	336 hours	4.60 mm / 0.18 In	3 days	1014 mb / 30 In
2013	30°C / 86°F	18°C / 65°F	24°C / 75°F	355 hours	1.40 mm / 0.06 In	1 days	1011 mb / 30 In
2014	30°C / 87°F	19°C / 67°F	25°C / 76°F	354 hours	3.20 mm / 0.13 In	0 days	1011 mb / 30 In
2015	31°C / 88°F	20°C / 68°F	25°C / 77°F	310 hours	16.30 mm / 0.64 In	2 days	1011 mb / 30 In
2016	30°C / 86°F	18°C / 64°F	23°C / 74°F	348 hours	3.10 mm / 0.12 In	1 days	1014 mb / 30 In
2017	29°C / 84°F	20°C / 67°F	24°C / 75°F	348 hours	9.36 mm / 0.37 In	2 days	1012 mb / 30 In
2018	30°C / 86°F	20°C / 68°F	24°C / 76°F	360 hours	0.00 mm / 0.00 In	0 days	1012 mb / 30 In
2019	30°C / 85°F	20°C / 67°F	24°C / 75°F	320 hours	3.00 mm / 0.12 In	0 days	1012 mb / 30 In
2020	34°C / 93°F	22°C / 71°F	28°C / 82°F	360 hours	0.00 mm / 0.00 In	0 days	1012 mb / 30 In
2021	32°C / 89°F	18°C / 65°F	24°C / 76°F	360 hours	0.10 mm / 0.00 In	0 days	1013 mb / 30 In
2022	33°C / 91°F	20°C / 69°F	26°C / 79°F	318 hours	16.80 mm / 0.66 In	2 days	1011 mb / 30 In
2023	27°C / 81°F	16°C / 61°F	21°C / 70°F	282 hours	13.75 mm / 0.54 In	2 days	1013 mb / 30 In
2024	30°C / 87°F	20°C / 68°F	25°C / 76°F	329 hours	0.23 mm / 0.01 In	0 days	1011 mb / 30 In
2025	29°C / 84°F	19°C / 66°F	23°C / 74°F	274 hours	7.40 mm / 0.29 In	0 days	1013 mb / 30 In
2026	30°C / 85°F	19°C / 65°F	23°C / 74°F	301 hours	59.80 mm / 2.35 In	4 days	1013 mb / 30 In

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Pasadena weather history: common questions

How far back does Pasadena 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 Pasadena 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.

Historical weather data

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For developers

History API

Hourly past weather for Pasadena as JSON, from 2010.

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