San Mateo September Weather Averages California, United States of America

September Weather Averages for San Mateo

High Temp	23°C	73°F
Low Temp	15°C	59°F
Avg Temp	18°C	65°F
Sunshine Hours	320 hours
Rainfall	3.07 mm	0.12 In
Rain days	0 days
Pressure	1013 mb	30 In

San Mateo September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	25°C / 78°F	13°C / 56°F	19°C / 66°F	356 hours	0.00 mm / 0.00 In	0 days	1013 mb / 30 In
2009	26°C / 78°F	14°C / 58°F	19°C / 67°F	344 hours	4.40 mm / 0.17 In	0 days	1014 mb / 30 In
2010	23°C / 74°F	14°C / 58°F	18°C / 65°F	329 hours	0.60 mm / 0.02 In	0 days	1013 mb / 30 In
2011	23°C / 73°F	15°C / 59°F	18°C / 65°F	348 hours	0.40 mm / 0.02 In	0 days	1014 mb / 30 In
2012	21°C / 69°F	13°C / 56°F	17°C / 62°F	347 hours	0.00 mm / 0.00 In	0 days	1015 mb / 30 In
2013	22°C / 71°F	15°C / 59°F	18°C / 65°F	321 hours	14.70 mm / 0.58 In	1 days	1013 mb / 30 In
2014	23°C / 73°F	16°C / 61°F	19°C / 66°F	339 hours	2.20 mm / 0.09 In	1 days	1012 mb / 30 In
2015	24°C / 75°F	16°C / 60°F	19°C / 67°F	314 hours	3.90 mm / 0.15 In	1 days	1012 mb / 30 In
2016	23°C / 73°F	15°C / 58°F	18°C / 65°F	351 hours	0.00 mm / 0.00 In	0 days	1015 mb / 30 In
2017	25°C / 77°F	18°C / 64°F	21°C / 70°F	309 hours	1.20 mm / 0.05 In	0 days	1013 mb / 30 In
2018	22°C / 72°F	15°C / 59°F	18°C / 65°F	345 hours	0.00 mm / 0.00 In	0 days	1013 mb / 30 In
2019	23°C / 73°F	17°C / 62°F	19°C / 67°F	323 hours	3.20 mm / 0.13 In	1 days	1014 mb / 30 In
2020	25°C / 76°F	16°C / 62°F	20°C / 68°F	342 hours	0.20 mm / 0.01 In	0 days	1014 mb / 30 In
2021	23°C / 73°F	13°C / 55°F	17°C / 63°F	338 hours	0.40 mm / 0.02 In	0 days	1014 mb / 30 In
2022	24°C / 75°F	15°C / 59°F	19°C / 66°F	300 hours	13.40 mm / 0.53 In	1 days	1012 mb / 30 In
2023	21°C / 70°F	13°C / 56°F	16°C / 61°F	233 hours	2.64 mm / 0.10 In	0 days	1015 mb / 30 In
2024	21°C / 70°F	13°C / 55°F	16°C / 61°F	235 hours	1.80 mm / 0.07 In	0 days	1012 mb / 30 In

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