Point Forecast: Williamstown MA  42.69N 73.18W (Elev. 689 ft)	Last Update: 12:53 am EST Dec 17, 2025

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Weather Elements Fire Weather Aviation Weather Temperature (°F) Dewpoint (°F) Wind Chill (°F) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Snow Freezing Rain Sleet Fog Mixing Height  x100ftx100m Trans. Wind  ktmphkm/hm/s 20ft Wind  ktmphkm/hm/s Vent Rate (x1000 mph-ft) Dispersion Index Ceiling Height Visibility Thunder Potential

48-Hour Period Starting: 2am Wed, Dec 17 20253am Wed, Dec 17 20254am Wed, Dec 17 20255am Wed, Dec 17 20256am Wed, Dec 17 20257am Wed, Dec 17 20258am Wed, Dec 17 20259am Wed, Dec 17 202510am Wed, Dec 17 202511am Wed, Dec 17 202512pm Wed, Dec 17 20251pm Wed, Dec 17 20252pm Wed, Dec 17 20253pm Wed, Dec 17 20254pm Wed, Dec 17 20255pm Wed, Dec 17 20256pm Wed, Dec 17 20257pm Wed, Dec 17 20258pm Wed, Dec 17 20259pm Wed, Dec 17 202510pm Wed, Dec 17 202511pm Wed, Dec 17 202512am Thu, Dec 18 20251am Thu, Dec 18 20252am Thu, Dec 18 20253am Thu, Dec 18 20254am Thu, Dec 18 20255am Thu, Dec 18 20256am Thu, Dec 18 20257am Thu, Dec 18 20258am Thu, Dec 18 20259am Thu, Dec 18 202510am Thu, Dec 18 202511am Thu, Dec 18 202512pm Thu, Dec 18 20251pm Thu, Dec 18 20252pm Thu, Dec 18 20253pm Thu, Dec 18 20254pm Thu, Dec 18 20255pm Thu, Dec 18 20256pm Thu, Dec 18 20257pm Thu, Dec 18 20258pm Thu, Dec 18 20259pm Thu, Dec 18 202510pm Thu, Dec 18 202511pm Thu, Dec 18 202512am Fri, Dec 19 20251am Fri, Dec 19 20252am Fri, Dec 19 20253am Fri, Dec 19 20254am Fri, Dec 19 20255am Fri, Dec 19 20256am Fri, Dec 19 20257am Fri, Dec 19 20258am Fri, Dec 19 20259am Fri, Dec 19 202510am Fri, Dec 19 202511am Fri, Dec 19 202512pm Fri, Dec 19 20251pm Fri, Dec 19 20252pm Fri, Dec 19 20253pm Fri, Dec 19 20254pm Fri, Dec 19 20255pm Fri, Dec 19 20256pm Fri, Dec 19 20257pm Fri, Dec 19 20258pm Fri, Dec 19 20259pm Fri, Dec 19 202510pm Fri, Dec 19 202511pm Fri, Dec 19 202512am Sat, Dec 20 20251am Sat, Dec 20 20252am Sat, Dec 20 20253am Sat, Dec 20 20254am Sat, Dec 20 20255am Sat, Dec 20 20256am Sat, Dec 20 20257am Sat, Dec 20 20258am Sat, Dec 20 20259am Sat, Dec 20 202510am Sat, Dec 20 202511am Sat, Dec 20 202512pm Sat, Dec 20 20251pm Sat, Dec 20 20252pm Sat, Dec 20 20253pm Sat, Dec 20 20254pm Sat, Dec 20 20255pm Sat, Dec 20 20256pm Sat, Dec 20 20257pm Sat, Dec 20 20258pm Sat, Dec 20 20259pm Sat, Dec 20 202510pm Sat, Dec 20 202511pm Sat, Dec 20 202512am Sun, Dec 21 20251am Sun, Dec 21 20252am Sun, Dec 21 20253am Sun, Dec 21 20254am Sun, Dec 21 20255am Sun, Dec 21 20256am Sun, Dec 21 20257am Sun, Dec 21 20258am Sun, Dec 21 20259am Sun, Dec 21 202510am Sun, Dec 21 202511am Sun, Dec 21 202512pm Sun, Dec 21 20251pm Sun, Dec 21 2025

Date	12/17																						12/18
Hour (EST)	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01
Temperature (°F)	21	22	22	23	23	24	25	29	33	37	39	39	41	40	40	39	39	38	36	35	34	32	30	27
Dewpoint (°F)	14	14	14	15	16	17	18	22	24	26	28	29	29	30	30	30	30	31	29	29	28	27	26	25
Wind Chill (°F)	12	13	12	13	12	14	15	20	25	30	32	32	35	33	33	32	31	30	27	26	26	24	24	22
Surface Wind (mph)	7	8	9	9	10	10	10	10	9	10	10	10	10	11	11	11	14	14	14	13	10	9	6	5
Wind Dir	SE	SE	S	S	S	S	SW	SW	SW	SW	SW	W	W	W	W	W	W	W	W	W	W	W	W	W
Gust										20	21	21	22	22	22	23					20
Sky Cover (%)	28	23	13	10	29	35	35	42	41	47	57	64	81	83	88	85	86	90	78	75	51	49	39	40
Precipitation Potential (%)	0	0	0	0	0	0	0	0	2	4	6	4	3	3	2	2	1	2	1	1	0	0	0	0
Relative Humidity (%)	74	71	71	71	74	74	74	75	69	64	64	67	62	67	67	70	70	76	75	78	78	82	85	92
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																							12/19
Hour (EST)	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01
Temperature (°F)	26	25	22	23	23	23	25	29	34	39	42	45	47	46	45	45	42	41	40	41	42	44	46	48
Dewpoint (°F)	24	22	21	20	19	18	20	22	23	24	25	26	27	28	29	31	32	34	36	37	39	40	42	43
Wind Chill (°F)	22	25	22	23	23	23	18	21	26	31	35	38	41	40	39	39	35	33	32	32	33	36	38	40
Surface Wind (mph)	3	2	2	2	2	2	6	8	10	13	14	15	15	14	14	14	14	15	16	18	20	21	22	23
Wind Dir	S	SW	SE	SE	E	E	E	SE	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S
Gust									22	25	28	29	29	28	28	29	30	31	32	33	34	36	36	37
Sky Cover (%)	29	28	42	38	44	35	45	37	28	33	27	27	35	42	50	57	63	72	78	85	93	94	96	98
Precipitation Potential (%)	0	0	0	0	0	1	1	1	1	1	1	4	4	4	4	4	4	49	49	49	62	62	62	97
Relative Humidity (%)	92	88	96	88	84	81	81	75	64	54	51	47	45	49	53	58	67	76	85	86	89	86	86	83
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Lkly	Lkly	Lkly	Ocnl
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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