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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Sun 24 May, 2026 Weather in Williamstown

Sunrise: 05:38 AM Sunset: 08:15 PM	Moonrise: 01:45 PM Moonset: 02:01 AM	Max: 18.0 °c	Min: 11.7 °c	Avg: 15.0 °c	Precip: 16.80 mm	Max Wind: 21.6 kph

	Sun 24 0:00 am	Sun 24 3:00 am	Sun 24 6:00 am	Sun 24 9:00 am	Sun 24 12:00 pm	Sun 24 3:00 pm	Sun 24 6:00 pm	Sun 24 9:00 pm
Icon
Temp	11.7°c	12.5°c	13.0°c	13.6°c	16.2°c	17.5°c	17.8°c	16.2°c
Wind	21.6 kmph	19.1 kmph	14.0 kmph	13.7 kmph	10.1 kmph	9.7 kmph	6.5 kmph	10.1 kmph
Precip	0.50 mm	0.70 mm	0.10 mm	3.60 mm	0.80 mm	0.50 mm	0.00 mm	0.10 mm
Cloud	100%	100%	100%	100%	100%	93%	98%	91%
Humidity	95%	97%	98%	98%	93%	82%	76%	91%
Pressure	1027 mb	1024 mb	1023 mb	1025 mb	1024 mb	1022 mb	1022 mb	1022 mb

Williamstown Annual Weather Averages

Month	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
January	4°C / 39°F	-3°C / 27°F	1°C / 33°F	176 hours	93.53 mm / 3.68 In	7 days	1018 mb / 31 In
February	6°C / 43°F	-2°C / 29°F	2°C / 36°F	155 hours	122.32 mm / 4.82 In	7 days	1018 mb / 31 In
March	11°C / 52°F	3°C / 37°F	7°C / 44°F	164 hours	123.82 mm / 4.87 In	7 days	1018 mb / 31 In
April	17°C / 63°F	8°C / 46°F	12°C / 54°F	165 hours	108.36 mm / 4.27 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	127.73 mm / 5.03 In	6 days	1017 mb / 31 In
November	12°C / 54°F	5°C / 41°F	9°C / 47°F	208 hours	91.60 mm / 3.61 In	5 days	1020 mb / 31 In
December	7°C / 45°F	1°C / 34°F	4°C / 39°F	173 hours	140.79 mm / 5.54 In	7 days	1019 mb / 31 In

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