Waltham September Weather Averages Massachusetts, United States of America

September Weather Averages for Waltham

High Temp	23°C	73°F
Low Temp	14°C	58°F
Avg Temp	18°C	65°F
Sunshine Hours	210 hours
Rainfall	90.29 mm	3.55 In
Rain days	6 days
Pressure	1018 mb	31 In

Waltham September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	22°C / 71°F	14°C / 58°F	18°C / 64°F	225 hours	225.68 mm / 8.88 In	8 days	1019 mb / 31 In
2009	21°C / 70°F	13°C / 55°F	17°C / 62°F	258 hours	39.46 mm / 1.55 In	4 days	1018 mb / 31 In
2010	24°C / 75°F	15°C / 58°F	19°C / 66°F	220 hours	52.70 mm / 2.07 In	5 days	1014 mb / 30 In
2011	22°C / 72°F	15°C / 58°F	18°C / 65°F	198 hours	116.09 mm / 4.57 In	9 days	1017 mb / 31 In
2012	22°C / 71°F	13°C / 55°F	17°C / 63°F	234 hours	85.00 mm / 3.35 In	8 days	1016 mb / 30 In
2013	22°C / 71°F	12°C / 54°F	17°C / 63°F	229 hours	54.40 mm / 2.14 In	6 days	1015 mb / 30 In
2014	23°C / 73°F	13°C / 56°F	18°C / 64°F	246 hours	17.40 mm / 0.69 In	3 days	1019 mb / 31 In
2015	24°C / 76°F	15°C / 60°F	20°C / 67°F	194 hours	90.42 mm / 3.56 In	4 days	1018 mb / 31 In
2016	24°C / 75°F	15°C / 60°F	19°C / 67°F	200 hours	57.90 mm / 2.28 In	6 days	1019 mb / 31 In
2017	24°C / 75°F	16°C / 61°F	20°C / 68°F	226 hours	60.68 mm / 2.39 In	6 days	1016 mb / 30 In
2018	23°C / 74°F	17°C / 62°F	20°C / 68°F	170 hours	127.67 mm / 5.03 In	7 days	1022 mb / 31 In
2019	23°C / 74°F	15°C / 58°F	19°C / 65°F	260 hours	33.30 mm / 1.31 In	4 days	1019 mb / 31 In
2020	24°C / 75°F	15°C / 60°F	19°C / 66°F	230 hours	31.80 mm / 1.25 In	5 days	1019 mb / 31 In
2021	23°C / 74°F	15°C / 59°F	19°C / 66°F	164 hours	151.00 mm / 5.94 In	8 days	1016 mb / 30 In
2022	23°C / 73°F	13°C / 56°F	17°C / 63°F	179 hours	134.90 mm / 5.31 In	5 days	1016 mb / 30 In
2023	24°C / 76°F	14°C / 58°F	19°C / 66°F	181 hours	174.45 mm / 6.87 In	6 days	1018 mb / 31 In
2024	22°C / 72°F	14°C / 57°F	18°C / 64°F	173 hours	217.47 mm / 8.56 In	5 days	1020 mb / 31 In

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