Williamstown Weather History New Jersey, United States of America

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Daily and hourly data from 1 Jan 2009 onwards.
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Wed 08 Oct, 2025 Weather in Williamstown

Sunrise: 07:03 AM Sunset: 06:31 PM	Moonrise: 07:12 PM Moonset: 08:52 AM	Max: 21.0 °c	Min: 14.3 °c	Avg: 18.6 °c	Precip: 44.00 mm	Max Wind: 19.1 kph

	Wed 08 0:00 am	Wed 08 3:00 am	Wed 08 6:00 am	Wed 08 9:00 am	Wed 08 12:00 pm	Wed 08 3:00 pm	Wed 08 6:00 pm	Wed 08 9:00 pm
Icon
Temp	19.3°c	19.5°c	19.8°c	19.4°c	18.1°c	19.8°c	18.9°c	15.0°c
Wind	15.5 kmph	16.9 kmph	14.0 kmph	8.6 kmph	14.8 kmph	14.8 kmph	12.6 kmph	17.6 kmph
Precip	0.00 mm	0.00 mm	0.70 mm	6.50 mm	6.70 mm	0.90 mm	0.00 mm	0.00 mm
Cloud	75%	82%	100%	100%	92%	86%	15%	15%
Humidity	93%	92%	93%	96%	83%	63%	56%	55%
Pressure	1018 mb	1016 mb	1014 mb	1014 mb	1016 mb	1017 mb	1020 mb	1023 mb

Williamstown Annual Weather Averages

Month	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
January	4°C / 39°F	-2°C / 28°F	1°C / 33°F	174 hours	84.85 mm / 3.34 In	7 days	1018 mb / 31 In
February	6°C / 43°F	-1°C / 30°F	2°C / 36°F	156 hours	111.15 mm / 4.38 In	7 days	1018 mb / 31 In
March	11°C / 52°F	2°C / 36°F	7°C / 44°F	166 hours	123.42 mm / 4.86 In	7 days	1018 mb / 31 In
April	17°C / 62°F	8°C / 46°F	12°C / 54°F	166 hours	107.49 mm / 4.23 In	7 days	1016 mb / 30 In
May	22°C / 72°F	13°C / 56°F	17°C / 63°F	174 hours	114.23 mm / 4.50 In	8 days	1016 mb / 30 In
June	27°C / 81°F	18°C / 64°F	22°C / 72°F	212 hours	135.76 mm / 5.35 In	9 days	1014 mb / 30 In
July	30°C / 86°F	21°C / 70°F	26°C / 78°F	225 hours	138.39 mm / 5.45 In	10 days	1015 mb / 30 In
August	29°C / 84°F	20°C / 69°F	24°C / 76°F	226 hours	147.11 mm / 5.79 In	9 days	1016 mb / 30 In
September	25°C / 78°F	17°C / 63°F	21°C / 70°F	202 hours	121.67 mm / 4.79 In	6 days	1018 mb / 31 In
October	19°C / 66°F	11°C / 52°F	15°C / 59°F	195 hours	121.68 mm / 4.79 In	6 days	1017 mb / 31 In
November	12°C / 54°F	5°C / 41°F	9°C / 47°F	210 hours	84.93 mm / 3.34 In	5 days	1020 mb / 31 In
December	8°C / 46°F	1°C / 34°F	4°C / 40°F	176 hours	137.07 mm / 5.40 In	7 days	1019 mb / 31 In

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