Half Moon Bay September Weather Averages California, United States of America

September Weather Averages for Half Moon Bay

High Temp	21°C	69°F
Low Temp	14°C	58°F
Avg Temp	17°C	63°F
Sunshine Hours	297 hours
Rainfall	2.77 mm	0.11 In
Rain days	0 days
Pressure	1013 mb	30 In

Half Moon Bay September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	23°C / 74°F	14°C / 56°F	18°C / 64°F	355 hours	0.00 mm / 0.00 In	0 days	1013 mb / 30 In
2009	24°C / 74°F	15°C / 58°F	18°C / 65°F	342 hours	3.80 mm / 0.15 In	0 days	1014 mb / 30 In
2010	20°C / 68°F	14°C / 58°F	17°C / 62°F	323 hours	0.10 mm / 0.00 In	0 days	1013 mb / 30 In
2011	20°C / 68°F	15°C / 58°F	17°C / 62°F	331 hours	0.30 mm / 0.01 In	0 days	1014 mb / 30 In
2012	18°C / 65°F	13°C / 56°F	15°C / 60°F	342 hours	0.00 mm / 0.00 In	0 days	1015 mb / 30 In
2013	20°C / 68°F	15°C / 59°F	17°C / 63°F	300 hours	11.53 mm / 0.45 In	1 days	1013 mb / 30 In
2014	21°C / 69°F	16°C / 60°F	18°C / 64°F	322 hours	2.80 mm / 0.11 In	1 days	1012 mb / 30 In
2015	22°C / 71°F	16°C / 60°F	18°C / 65°F	281 hours	2.40 mm / 0.09 In	1 days	1012 mb / 30 In
2016	20°C / 69°F	14°C / 58°F	17°C / 62°F	316 hours	0.00 mm / 0.00 In	0 days	1015 mb / 30 In
2017	23°C / 73°F	17°C / 62°F	19°C / 67°F	290 hours	1.20 mm / 0.05 In	0 days	1013 mb / 30 In
2018	20°C / 67°F	14°C / 57°F	16°C / 61°F	321 hours	0.00 mm / 0.00 In	0 days	1013 mb / 30 In
2019	21°C / 69°F	16°C / 60°F	18°C / 64°F	295 hours	0.70 mm / 0.03 In	0 days	1014 mb / 30 In
2020	22°C / 72°F	15°C / 59°F	18°C / 64°F	328 hours	0.00 mm / 0.00 In	0 days	1014 mb / 30 In
2021	20°C / 69°F	13°C / 55°F	16°C / 60°F	325 hours	0.10 mm / 0.00 In	0 days	1014 mb / 30 In
2022	22°C / 71°F	14°C / 57°F	17°C / 63°F	298 hours	14.90 mm / 0.59 In	1 days	1012 mb / 30 In
2023	18°C / 65°F	13°C / 55°F	15°C / 59°F	191 hours	3.43 mm / 0.13 In	0 days	1015 mb / 30 In
2024	18°C / 64°F	12°C / 54°F	15°C / 58°F	146 hours	3.12 mm / 0.12 In	0 days	1012 mb / 30 In

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