Costa Mesa September Weather Averages California, United States of America

September Weather Averages for Costa Mesa

High Temp	26°C	78°F
Low Temp	20°C	67°F
Avg Temp	22°C	72°F
Sunshine Hours	319 hours
Rainfall	3.96 mm	0.16 In
Rain days	0 days
Pressure	1012 mb	30 In

Costa Mesa September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	27°C / 80°F	19°C / 66°F	22°C / 72°F	357 hours	0.00 mm / 0.00 In	0 days	1012 mb / 30 In
2009	28°C / 82°F	19°C / 66°F	23°C / 73°F	356 hours	0.00 mm / 0.00 In	0 days	1013 mb / 30 In
2010	25°C / 77°F	17°C / 62°F	20°C / 69°F	344 hours	0.10 mm / 0.00 In	0 days	1012 mb / 30 In
2011	24°C / 75°F	18°C / 64°F	20°C / 69°F	356 hours	1.80 mm / 0.07 In	0 days	1013 mb / 30 In
2012	27°C / 80°F	20°C / 69°F	23°C / 74°F	333 hours	2.50 mm / 0.10 In	1 days	1014 mb / 30 In
2013	25°C / 78°F	19°C / 66°F	22°C / 71°F	345 hours	1.10 mm / 0.04 In	0 days	1011 mb / 30 In
2014	27°C / 80°F	20°C / 69°F	23°C / 74°F	339 hours	4.70 mm / 0.19 In	0 days	1011 mb / 30 In
2015	27°C / 81°F	21°C / 70°F	24°C / 75°F	293 hours	16.60 mm / 0.65 In	1 days	1011 mb / 30 In
2016	25°C / 78°F	19°C / 66°F	22°C / 71°F	327 hours	3.90 mm / 0.15 In	1 days	1014 mb / 30 In
2017	25°C / 78°F	20°C / 69°F	23°C / 73°F	332 hours	5.10 mm / 0.20 In	0 days	1012 mb / 30 In
2018	25°C / 77°F	20°C / 68°F	22°C / 72°F	351 hours	0.00 mm / 0.00 In	0 days	1012 mb / 30 In
2019	26°C / 79°F	21°C / 69°F	23°C / 74°F	297 hours	2.40 mm / 0.09 In	0 days	1012 mb / 30 In
2020	28°C / 83°F	22°C / 71°F	25°C / 77°F	359 hours	0.20 mm / 0.01 In	0 days	1012 mb / 30 In
2021	26°C / 78°F	19°C / 66°F	22°C / 71°F	356 hours	0.10 mm / 0.00 In	0 days	1012 mb / 30 In
2022	28°C / 83°F	22°C / 71°F	24°C / 76°F	327 hours	19.50 mm / 0.77 In	1 days	1010 mb / 30 In
2023	23°C / 73°F	17°C / 63°F	20°C / 68°F	193 hours	5.00 mm / 0.20 In	0 days	1013 mb / 30 In
2024	23°C / 74°F	19°C / 66°F	21°C / 69°F	193 hours	0.36 mm / 0.01 In	0 days	1010 mb / 30 In

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