Chelmsford September Weather Averages Massachusetts, United States of America

September Weather Averages for Chelmsford

High Temp	23°C	74°F
Low Temp	14°C	57°F
Avg Temp	18°C	65°F
Sunshine Hours	213 hours
Rainfall	92.72 mm	3.65 In
Rain days	6 days
Pressure	1018 mb	31 In

Chelmsford September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	22°C / 71°F	13°C / 56°F	17°C / 63°F	225 hours	256.70 mm / 10.11 In	9 days	1019 mb / 31 In
2009	21°C / 70°F	12°C / 53°F	16°C / 61°F	249 hours	44.19 mm / 1.74 In	3 days	1018 mb / 31 In
2010	24°C / 75°F	14°C / 57°F	19°C / 65°F	212 hours	57.09 mm / 2.25 In	5 days	1014 mb / 30 In
2011	23°C / 74°F	14°C / 57°F	18°C / 65°F	202 hours	126.17 mm / 4.97 In	7 days	1017 mb / 31 In
2012	22°C / 72°F	12°C / 54°F	17°C / 63°F	244 hours	92.74 mm / 3.65 In	7 days	1016 mb / 30 In
2013	23°C / 73°F	12°C / 53°F	17°C / 62°F	248 hours	94.36 mm / 3.71 In	7 days	1015 mb / 30 In
2014	23°C / 74°F	13°C / 55°F	18°C / 64°F	257 hours	18.00 mm / 0.71 In	4 days	1019 mb / 31 In
2015	25°C / 77°F	15°C / 59°F	19°C / 67°F	192 hours	127.86 mm / 5.03 In	6 days	1018 mb / 31 In
2016	24°C / 76°F	15°C / 59°F	19°C / 66°F	219 hours	56.53 mm / 2.23 In	7 days	1019 mb / 31 In
2017	25°C / 77°F	15°C / 60°F	20°C / 67°F	215 hours	57.43 mm / 2.26 In	4 days	1016 mb / 30 In
2018	24°C / 75°F	16°C / 60°F	19°C / 67°F	179 hours	129.07 mm / 5.08 In	7 days	1022 mb / 31 In
2019	24°C / 75°F	13°C / 56°F	18°C / 65°F	255 hours	33.68 mm / 1.33 In	4 days	1019 mb / 31 In
2020	24°C / 75°F	15°C / 58°F	19°C / 66°F	232 hours	26.50 mm / 1.04 In	4 days	1019 mb / 31 In
2021	23°C / 74°F	14°C / 57°F	18°C / 65°F	169 hours	151.20 mm / 5.95 In	10 days	1016 mb / 30 In
2022	23°C / 73°F	13°C / 55°F	17°C / 63°F	181 hours	110.50 mm / 4.35 In	5 days	1016 mb / 30 In
2023	24°C / 76°F	14°C / 57°F	18°C / 65°F	175 hours	148.43 mm / 5.84 In	6 days	1018 mb / 31 In
2024	22°C / 72°F	13°C / 56°F	17°C / 63°F	171 hours	209.72 mm / 8.26 In	4 days	1020 mb / 31 In

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