Stony Brook September Weather Averages New York, United States of America

September Weather Averages for Stony Brook

High Temp	23°C	73°F
Low Temp	18°C	65°F
Avg Temp	20°C	69°F
Sunshine Hours	214 hours
Rainfall	111.50 mm	4.39 In
Rain days	6 days
Pressure	1018 mb	31 In

Stony Brook September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	22°C / 72°F	18°C / 64°F	20°C / 68°F	242 hours	206.43 mm / 8.13 In	8 days	1019 mb / 31 In
2009	21°C / 70°F	17°C / 63°F	19°C / 67°F	238 hours	59.42 mm / 2.34 In	2 days	1018 mb / 31 In
2010	23°C / 73°F	18°C / 65°F	21°C / 69°F	252 hours	103.38 mm / 4.07 In	4 days	1014 mb / 30 In
2011	22°C / 72°F	18°C / 65°F	20°C / 68°F	202 hours	149.78 mm / 5.90 In	8 days	1016 mb / 30 In
2012	22°C / 72°F	18°C / 65°F	20°C / 69°F	219 hours	150.80 mm / 5.94 In	6 days	1016 mb / 30 In
2013	22°C / 71°F	16°C / 61°F	19°C / 66°F	272 hours	78.44 mm / 3.09 In	7 days	1016 mb / 30 In
2014	23°C / 73°F	18°C / 64°F	20°C / 68°F	262 hours	49.01 mm / 1.93 In	5 days	1019 mb / 31 In
2015	24°C / 75°F	19°C / 66°F	21°C / 70°F	160 hours	111.08 mm / 4.37 In	5 days	1018 mb / 31 In
2016	24°C / 74°F	19°C / 66°F	21°C / 70°F	233 hours	74.91 mm / 2.95 In	9 days	1019 mb / 31 In
2017	23°C / 74°F	18°C / 65°F	21°C / 70°F	234 hours	67.03 mm / 2.64 In	6 days	1016 mb / 30 In
2018	24°C / 75°F	19°C / 67°F	21°C / 71°F	140 hours	171.09 mm / 6.74 In	10 days	1021 mb / 31 In
2019	23°C / 73°F	18°C / 65°F	21°C / 69°F	216 hours	51.87 mm / 2.04 In	6 days	1019 mb / 31 In
2020	23°C / 73°F	18°C / 65°F	21°C / 69°F	211 hours	80.69 mm / 3.18 In	4 days	1019 mb / 31 In
2021	24°C / 75°F	19°C / 66°F	21°C / 70°F	189 hours	157.94 mm / 6.22 In	7 days	1016 mb / 30 In
2022	24°C / 74°F	18°C / 64°F	20°C / 69°F	227 hours	83.40 mm / 3.28 In	5 days	1016 mb / 30 In
2023	24°C / 74°F	18°C / 65°F	20°C / 69°F	175 hours	278.53 mm / 10.97 In	8 days	1018 mb / 31 In
2024	22°C / 71°F	18°C / 64°F	20°C / 67°F	187 hours	116.57 mm / 4.59 In	6 days	1019 mb / 31 In

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