Point Forecast: Waltham MA  42.38N 71.24W (Elev. 30 m)	Last Update: 2:56 pm EDT Apr 25, 2025

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

48-Hour Period Starting: 3pm Fri, Apr 25 20254pm Fri, Apr 25 20255pm Fri, Apr 25 20256pm Fri, Apr 25 20257pm Fri, Apr 25 20258pm Fri, Apr 25 20259pm Fri, Apr 25 202510pm Fri, Apr 25 202511pm Fri, Apr 25 202512am Sat, Apr 26 20251am Sat, Apr 26 20252am Sat, Apr 26 20253am Sat, Apr 26 20254am Sat, Apr 26 20255am Sat, Apr 26 20256am Sat, Apr 26 20257am Sat, Apr 26 20258am Sat, Apr 26 20259am Sat, Apr 26 202510am Sat, Apr 26 202511am Sat, Apr 26 202512pm Sat, Apr 26 20251pm Sat, Apr 26 20252pm Sat, Apr 26 20253pm Sat, Apr 26 20254pm Sat, Apr 26 20255pm Sat, Apr 26 20256pm Sat, Apr 26 20257pm Sat, Apr 26 20258pm Sat, Apr 26 20259pm Sat, Apr 26 202510pm Sat, Apr 26 202511pm Sat, Apr 26 202512am Sun, Apr 27 20251am Sun, Apr 27 20252am Sun, Apr 27 20253am Sun, Apr 27 20254am Sun, Apr 27 20255am Sun, Apr 27 20256am Sun, Apr 27 20257am Sun, Apr 27 20258am Sun, Apr 27 20259am Sun, Apr 27 202510am Sun, Apr 27 202511am Sun, Apr 27 202512pm Sun, Apr 27 20251pm Sun, Apr 27 20252pm Sun, Apr 27 20253pm Sun, Apr 27 20254pm Sun, Apr 27 20255pm Sun, Apr 27 20256pm Sun, Apr 27 20257pm Sun, Apr 27 20258pm Sun, Apr 27 20259pm Sun, Apr 27 202510pm Sun, Apr 27 202511pm Sun, Apr 27 202512am Mon, Apr 28 20251am Mon, Apr 28 20252am Mon, Apr 28 20253am Mon, Apr 28 20254am Mon, Apr 28 20255am Mon, Apr 28 20256am Mon, Apr 28 20257am Mon, Apr 28 20258am Mon, Apr 28 20259am Mon, Apr 28 202510am Mon, Apr 28 202511am Mon, Apr 28 202512pm Mon, Apr 28 20251pm Mon, Apr 28 20252pm Mon, Apr 28 20253pm Mon, Apr 28 20254pm Mon, Apr 28 20255pm Mon, Apr 28 20256pm Mon, Apr 28 20257pm Mon, Apr 28 20258pm Mon, Apr 28 20259pm Mon, Apr 28 202510pm Mon, Apr 28 202511pm Mon, Apr 28 202512am Tue, Apr 29 20251am Tue, Apr 29 20252am Tue, Apr 29 20253am Tue, Apr 29 20254am Tue, Apr 29 20255am Tue, Apr 29 20256am Tue, Apr 29 20257am Tue, Apr 29 20258am Tue, Apr 29 20259am Tue, Apr 29 202510am Tue, Apr 29 202511am Tue, Apr 29 202512pm Tue, Apr 29 20251pm Tue, Apr 29 20252pm Tue, Apr 29 20253pm Tue, Apr 29 20254pm Tue, Apr 29 20255pm Tue, Apr 29 20256pm Tue, Apr 29 20257pm Tue, Apr 29 20258pm Tue, Apr 29 20259pm Tue, Apr 29 202510pm Tue, Apr 29 202511pm Tue, Apr 29 202512am Wed, Apr 30 20251am Wed, Apr 30 20252am Wed, Apr 30 2025

Date	04/25									04/26
Hour (EDT)	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14
Temperature (°C)	20	18	16	17	18	17	17	16	16	16	16	16	16	15	15	14	14	15	16	16	16	16	16	16
Dewpoint (°C)	10	9	9	9	9	9	9	10	11	11	12	12	13	13	13	13	13	13	13	13	13	14	14	14
Heat Index (°C)
Surface Wind (mph)	6	8	9	8	8	6	5	5	6	6	7	7	7	7	7	8	9	9	10	10	11	15	15	14
Wind Dir	SE	E	E	E	E	E	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	SW
Gust
Sky Cover (%)	83	78	84	84	89	91	92	93	90	89	95	95	95	100	100	100	100	100	100	100	99	99	99	95
Precipitation Potential (%)	4	4	3	3	3	2	2	1	1	3	4	6	12	18	23	59	95	82	91	100	88	76	65	53
Relative Humidity (%)	52	56	67	60	54	58	60	67	72	75	78	81	84	87	87	90	90	87	87	87	84	87	87	87
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	Lkly	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Lkly	Chc
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date										04/27
Hour (EDT)	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14
Temperature (°C)	17	17	18	17	17	16	16	16	14	13	13	12	11	10	9	9	9	10	11	11	12	13	13	13
Dewpoint (°C)	14	14	14	14	14	14	12	10	8	7	6	4	4	3	2	2	2	4	4	4	4	4	4	4
Heat Index (°C)
Surface Wind (mph)	13	11	11	11	10	10	11	11	13	13	13	13	13	13	11	11	13	13	14	14	15	15	16	16
Wind Dir	SW	SW	SW	SW	SW	SW	SW	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	NW	NW
Gust
Sky Cover (%)	92	88	85	89	80	77	79	78	76	68	61	54	50	46	42	42	43	43	50	56	63	65	66	67
Precipitation Potential (%)	53	53	66	79	69	58	37	17	12	12	13	13	12	12	11	12	12	13	14	14	13	17	20	23
Relative Humidity (%)	84	81	81	84	87	87	78	69	67	66	61	61	61	63	61	61	61	68	63	61	61	57	57	55
Rain	Chc	Chc	Lkly	Ocnl	Lkly	Lkly	Chc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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