Walnut Creek September Weather Averages California, United States of America

September Weather Averages for Walnut Creek

High Temp	28°C	83°F
Low Temp	15°C	59°F
Avg Temp	21°C	69°F
Sunshine Hours	329 hours
Rainfall	3.30 mm	0.13 In
Rain days	1 days
Pressure	1013 mb	30 In

Walnut Creek September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	30°C / 85°F	14°C / 57°F	21°C / 69°F	357 hours	0.00 mm / 0.00 In	0 days	1013 mb / 30 In
2009	30°C / 87°F	15°C / 60°F	22°C / 71°F	350 hours	3.60 mm / 0.14 In	0 days	1014 mb / 30 In
2010	29°C / 85°F	14°C / 57°F	20°C / 69°F	337 hours	0.00 mm / 0.00 In	0 days	1013 mb / 30 In
2011	29°C / 84°F	15°C / 59°F	21°C / 69°F	350 hours	1.00 mm / 0.04 In	1 days	1014 mb / 30 In
2012	27°C / 81°F	13°C / 56°F	19°C / 66°F	343 hours	0.00 mm / 0.00 In	0 days	1015 mb / 30 In
2013	27°C / 80°F	14°C / 58°F	20°C / 68°F	335 hours	9.10 mm / 0.36 In	1 days	1013 mb / 30 In
2014	27°C / 81°F	15°C / 59°F	20°C / 68°F	336 hours	3.80 mm / 0.15 In	2 days	1012 mb / 30 In
2015	29°C / 83°F	16°C / 60°F	21°C / 70°F	302 hours	2.80 mm / 0.11 In	2 days	1012 mb / 30 In
2016	28°C / 82°F	14°C / 57°F	20°C / 68°F	354 hours	0.00 mm / 0.00 In	0 days	1014 mb / 30 In
2017	29°C / 84°F	18°C / 65°F	23°C / 73°F	314 hours	1.30 mm / 0.05 In	0 days	1013 mb / 30 In
2018	27°C / 81°F	15°C / 59°F	20°C / 68°F	336 hours	0.00 mm / 0.00 In	0 days	1013 mb / 30 In
2019	28°C / 83°F	17°C / 63°F	22°C / 71°F	341 hours	0.50 mm / 0.02 In	0 days	1013 mb / 30 In
2020	31°C / 88°F	18°C / 64°F	24°C / 74°F	359 hours	0.00 mm / 0.00 In	0 days	1014 mb / 30 In
2021	30°C / 86°F	15°C / 58°F	21°C / 70°F	350 hours	0.20 mm / 0.01 In	0 days	1013 mb / 30 In
2022	30°C / 87°F	16°C / 61°F	22°C / 71°F	304 hours	25.60 mm / 1.01 In	2 days	1011 mb / 30 In
2023	25°C / 78°F	12°C / 53°F	17°C / 63°F	273 hours	4.04 mm / 0.16 In	0 days	1014 mb / 30 In
2024	27°C / 81°F	14°C / 56°F	19°C / 66°F	285 hours	0.87 mm / 0.03 In	0 days	1011 mb / 30 In

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