Point Forecast: Chelmsford MA  42.6N 71.37W (Elev. 285 ft)	Last Update: 7:02 pm EDT Jun 20, 2024

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Weather Elements Fire Weather Aviation Weather Temperature (°F) Dewpoint (°F) Heat Index (°F) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Fog Mixing Height  x100ftx100m Haines Index Lightning Activity Level 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: 7pm Thu, Jun 20 20248pm Thu, Jun 20 20249pm Thu, Jun 20 202410pm Thu, Jun 20 202411pm Thu, Jun 20 202412am Fri, Jun 21 20241am Fri, Jun 21 20242am Fri, Jun 21 20243am Fri, Jun 21 20244am Fri, Jun 21 20245am Fri, Jun 21 20246am Fri, Jun 21 20247am Fri, Jun 21 20248am Fri, Jun 21 20249am Fri, Jun 21 202410am Fri, Jun 21 202411am Fri, Jun 21 202412pm Fri, Jun 21 20241pm Fri, Jun 21 20242pm Fri, Jun 21 20243pm Fri, Jun 21 20244pm Fri, Jun 21 20245pm Fri, Jun 21 20246pm Fri, Jun 21 20247pm Fri, Jun 21 20248pm Fri, Jun 21 20249pm Fri, Jun 21 202410pm Fri, Jun 21 202411pm Fri, Jun 21 202412am Sat, Jun 22 20241am Sat, Jun 22 20242am Sat, Jun 22 20243am Sat, Jun 22 20244am Sat, Jun 22 20245am Sat, Jun 22 20246am Sat, Jun 22 20247am Sat, Jun 22 20248am Sat, Jun 22 20249am Sat, Jun 22 202410am Sat, Jun 22 202411am Sat, Jun 22 202412pm Sat, Jun 22 20241pm Sat, Jun 22 20242pm Sat, Jun 22 20243pm Sat, Jun 22 20244pm Sat, Jun 22 20245pm Sat, Jun 22 20246pm Sat, Jun 22 20247pm Sat, Jun 22 20248pm Sat, Jun 22 20249pm Sat, Jun 22 202410pm Sat, Jun 22 202411pm Sat, Jun 22 202412am Sun, Jun 23 20241am Sun, Jun 23 20242am Sun, Jun 23 20243am Sun, Jun 23 20244am Sun, Jun 23 20245am Sun, Jun 23 20246am Sun, Jun 23 20247am Sun, Jun 23 20248am Sun, Jun 23 20249am Sun, Jun 23 202410am Sun, Jun 23 202411am Sun, Jun 23 202412pm Sun, Jun 23 20241pm Sun, Jun 23 20242pm Sun, Jun 23 20243pm Sun, Jun 23 20244pm Sun, Jun 23 20245pm Sun, Jun 23 20246pm Sun, Jun 23 20247pm Sun, Jun 23 20248pm Sun, Jun 23 20249pm Sun, Jun 23 202410pm Sun, Jun 23 202411pm Sun, Jun 23 202412am Mon, Jun 24 20241am Mon, Jun 24 20242am Mon, Jun 24 20243am Mon, Jun 24 20244am Mon, Jun 24 20245am Mon, Jun 24 20246am Mon, Jun 24 20247am Mon, Jun 24 20248am Mon, Jun 24 20249am Mon, Jun 24 202410am Mon, Jun 24 202411am Mon, Jun 24 202412pm Mon, Jun 24 20241pm Mon, Jun 24 20242pm Mon, Jun 24 20243pm Mon, Jun 24 20244pm Mon, Jun 24 20245pm Mon, Jun 24 20246pm Mon, Jun 24 20247pm Mon, Jun 24 20248pm Mon, Jun 24 20249pm Mon, Jun 24 202410pm Mon, Jun 24 202411pm Mon, Jun 24 202412am Tue, Jun 25 20241am Tue, Jun 25 20242am Tue, Jun 25 20243am Tue, Jun 25 20244am Tue, Jun 25 20245am Tue, Jun 25 20246am Tue, Jun 25 2024

Date	06/20					06/21
Hour (EDT)	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18
Temperature (°F)	89	88	84	81	78	76	75	74	74	73	73	74	76	77	78	78	79	80	81	81	81	79	77	75
Dewpoint (°F)	75	73	72	72	72	71	71	71	70	70	70	70	71	72	71	71	71	70	69	68	67	66	65	65
Heat Index (°F)	99	96	90	85	78	76	75						76	77	78	78	79	83	84	84	83	79	77	75
Surface Wind (mph)	6	5	3	2	1	1	1	1	1	1	1	1	1	1	2	3	3	5	5	6	6	6	6	6
Wind Dir	W	W	W	NW	N	NW	W	W	W	W	NW	NW	NW	NW	NW	N	N	N	NE	NE	NE	E	E	E
Gust
Sky Cover (%)	79	78	89	90	93	83	84	77	87	79	78	74	60	52	57	60	69	74	67	75	71	80	86	85
Precipitation Potential (%)	28	44	61	43	16	16	16	16	18	20	22	20	17	15	11	13	22	35	48	61	56	52	47	42
Relative Humidity (%)	64	61	67	74	82	85	87	90	87	90	90	87	85	85	79	79	77	72	67	65	63	64	67	71
Rain	Chc	Chc	Lkly	Chc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	--	--	SChc	Chc	Chc	Lkly	Lkly	Chc	Chc	Chc
Thunder	Chc	Chc	Lkly	Chc	SChc	SChc	SChc	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	SChc
Date						06/22
Hour (EDT)	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18
Temperature (°F)	72	71	70	69	69	68	67	66	66	65	65	65	66	67	68	69	70	72	73	73	74	73	73	72
Dewpoint (°F)	65	65	66	65	65	65	65	65	65	65	65	65	66	66	66	66	66	67	67	68	68	68	68	67
Heat Index (°F)
Surface Wind (mph)	6	6	5	3	2	2	1	1	1	2	2	2	1	1	3	5	5	5	6	6	6	6	6	6
Wind Dir	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E
Gust
Sky Cover (%)	84	83	85	88	92	90	88	87	88	90	92	91	92	92	89	90	90	90	89	89	88	87	86	86
Precipitation Potential (%)	37	32	26	19	13	16	19	22	20	18	16	18	21	23	44	41	39	43	46	50	54	57	61	59
Relative Humidity (%)	79	81	87	87	87	90	93	97	97	100	100	100	100	90	93	90	87	84	81	84	82	84	84	84
Rain	Chc	Chc	Chc	SChc	--	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Lkly	Lkly	Lkly
Thunder	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	SChc

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