Point Forecast: McHenry MD  39.56N 79.36W (Elev. 2500 ft)	Last Update: 7:30 pm EDT Jul 26, 2024

[hide menu]

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 Vent Rate (x1000 mph-ft) Atmospheric Dispersion Index Low Visibility Occurrence Risk Index Ceiling Height Visibility

48-Hour Period Starting: 8pm Fri, Jul 26 20249pm Fri, Jul 26 202410pm Fri, Jul 26 202411pm Fri, Jul 26 202412am Sat, Jul 27 20241am Sat, Jul 27 20242am Sat, Jul 27 20243am Sat, Jul 27 20244am Sat, Jul 27 20245am Sat, Jul 27 20246am Sat, Jul 27 20247am Sat, Jul 27 20248am Sat, Jul 27 20249am Sat, Jul 27 202410am Sat, Jul 27 202411am Sat, Jul 27 202412pm Sat, Jul 27 20241pm Sat, Jul 27 20242pm Sat, Jul 27 20243pm Sat, Jul 27 20244pm Sat, Jul 27 20245pm Sat, Jul 27 20246pm Sat, Jul 27 20247pm Sat, Jul 27 20248pm Sat, Jul 27 20249pm Sat, Jul 27 202410pm Sat, Jul 27 202411pm Sat, Jul 27 202412am Sun, Jul 28 20241am Sun, Jul 28 20242am Sun, Jul 28 20243am Sun, Jul 28 20244am Sun, Jul 28 20245am Sun, Jul 28 20246am Sun, Jul 28 20247am Sun, Jul 28 20248am Sun, Jul 28 20249am Sun, Jul 28 202410am Sun, Jul 28 202411am Sun, Jul 28 202412pm Sun, Jul 28 20241pm Sun, Jul 28 20242pm Sun, Jul 28 20243pm Sun, Jul 28 20244pm Sun, Jul 28 20245pm Sun, Jul 28 20246pm Sun, Jul 28 20247pm Sun, Jul 28 20248pm Sun, Jul 28 20249pm Sun, Jul 28 202410pm Sun, Jul 28 202411pm Sun, Jul 28 202412am Mon, Jul 29 20241am Mon, Jul 29 20242am Mon, Jul 29 20243am Mon, Jul 29 20244am Mon, Jul 29 20245am Mon, Jul 29 20246am Mon, Jul 29 20247am Mon, Jul 29 20248am Mon, Jul 29 20249am Mon, Jul 29 202410am Mon, Jul 29 202411am Mon, Jul 29 202412pm Mon, Jul 29 20241pm Mon, Jul 29 20242pm Mon, Jul 29 20243pm Mon, Jul 29 20244pm Mon, Jul 29 20245pm Mon, Jul 29 20246pm Mon, Jul 29 20247pm Mon, Jul 29 20248pm Mon, Jul 29 20249pm Mon, Jul 29 202410pm Mon, Jul 29 202411pm Mon, Jul 29 202412am Tue, Jul 30 20241am Tue, Jul 30 20242am Tue, Jul 30 20243am Tue, Jul 30 20244am Tue, Jul 30 20245am Tue, Jul 30 20246am Tue, Jul 30 20247am Tue, Jul 30 20248am Tue, Jul 30 20249am Tue, Jul 30 202410am Tue, Jul 30 202411am Tue, Jul 30 202412pm Tue, Jul 30 20241pm Tue, Jul 30 20242pm Tue, Jul 30 20243pm Tue, Jul 30 20244pm Tue, Jul 30 20245pm Tue, Jul 30 20246pm Tue, Jul 30 20247pm Tue, Jul 30 20248pm Tue, Jul 30 20249pm Tue, Jul 30 202410pm Tue, Jul 30 202411pm Tue, Jul 30 202412am Wed, Jul 31 20241am Wed, Jul 31 20242am Wed, Jul 31 20243am Wed, Jul 31 20244am Wed, Jul 31 20245am Wed, Jul 31 20246am Wed, Jul 31 20247am Wed, Jul 31 2024

Date	07/26				07/27
Hour (EDT)	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19
Temperature (°F)	72	68	65	63	61	59	58	57	56	56	56	59	63	67	70	73	75	76	78	79	79	79	78	76
Dewpoint (°F)	55	53	52	51	50	50	50	50	51	52	53	54	56	57	57	57	58	57	57	57	57	57	58	58
Heat Index (°F)																	75	76	78	79	79	79	78	76
Surface Wind (mph)	5	6	6	6	8	9	8	8	8	7	7	6	6	6	6	6	6	6	6	6	5	5	5	6
Wind Dir	E	E	E	E	E	E	E	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE
Gust
Sky Cover (%)	32	12	16	37	17	4	2	2	3	4	7	9	10	9	9	20	30	30	34	30	26	28	25	14
Precipitation Potential (%)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	55	59	63	65	67	72	75	77	83	86	90	83	78	70	63	57	55	52	48	47	47	47	50	54
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date					07/28
Hour (EDT)	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19
Temperature (°F)	74	71	68	66	65	64	63	62	61	61	62	64	66	70	74	77	80	81	82	83	83	83	81	79
Dewpoint (°F)	57	57	56	55	55	55	55	55	55	55	56	57	58	60	61	61	61	61	60	61	60	61	61	61
Heat Index (°F)																77	81	82	82	83	83	83	82	79
Surface Wind (mph)	6	6	6	6	6	6	6	6	6	5	5	3	3	3	3	5	5	3	3	5	5	5	5	5
Wind Dir	SE	SE	SE	SE	SE	SE	S	S	S	S	S	S	S	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW
Gust
Sky Cover (%)	10	6	5	6	5	3	2	3	6	7	9	12	14	20	24	37	45	50	49	47	43	34	27	26
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	55	61	65	68	70	73	75	78	81	81	81	78	75	71	64	58	52	51	47	47	46	47	51	54
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

International System of Units Forecast Discussion 7-Day Forecast Hourly Weather Graph Hazardous Weather Briefing Page Past Weather Information Interactive Forecast Map Home