Point Forecast: 2 Miles ESE Great Falls VA  39N 77.26W (Elev. 259 ft)	Last Update: 7:30 pm EDT May 31, 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, May 31 20249pm Fri, May 31 202410pm Fri, May 31 202411pm Fri, May 31 202412am Sat, Jun 1 20241am Sat, Jun 1 20242am Sat, Jun 1 20243am Sat, Jun 1 20244am Sat, Jun 1 20245am Sat, Jun 1 20246am Sat, Jun 1 20247am Sat, Jun 1 20248am Sat, Jun 1 20249am Sat, Jun 1 202410am Sat, Jun 1 202411am Sat, Jun 1 202412pm Sat, Jun 1 20241pm Sat, Jun 1 20242pm Sat, Jun 1 20243pm Sat, Jun 1 20244pm Sat, Jun 1 20245pm Sat, Jun 1 20246pm Sat, Jun 1 20247pm Sat, Jun 1 20248pm Sat, Jun 1 20249pm Sat, Jun 1 202410pm Sat, Jun 1 202411pm Sat, Jun 1 202412am Sun, Jun 2 20241am Sun, Jun 2 20242am Sun, Jun 2 20243am Sun, Jun 2 20244am Sun, Jun 2 20245am Sun, Jun 2 20246am Sun, Jun 2 20247am Sun, Jun 2 20248am Sun, Jun 2 20249am Sun, Jun 2 202410am Sun, Jun 2 202411am Sun, Jun 2 202412pm Sun, Jun 2 20241pm Sun, Jun 2 20242pm Sun, Jun 2 20243pm Sun, Jun 2 20244pm Sun, Jun 2 20245pm Sun, Jun 2 20246pm Sun, Jun 2 20247pm Sun, Jun 2 20248pm Sun, Jun 2 20249pm Sun, Jun 2 202410pm Sun, Jun 2 202411pm Sun, Jun 2 202412am Mon, Jun 3 20241am Mon, Jun 3 20242am Mon, Jun 3 20243am Mon, Jun 3 20244am Mon, Jun 3 20245am Mon, Jun 3 20246am Mon, Jun 3 20247am Mon, Jun 3 20248am Mon, Jun 3 20249am Mon, Jun 3 202410am Mon, Jun 3 202411am Mon, Jun 3 202412pm Mon, Jun 3 20241pm Mon, Jun 3 20242pm Mon, Jun 3 20243pm Mon, Jun 3 20244pm Mon, Jun 3 20245pm Mon, Jun 3 20246pm Mon, Jun 3 20247pm Mon, Jun 3 20248pm Mon, Jun 3 20249pm Mon, Jun 3 202410pm Mon, Jun 3 202411pm Mon, Jun 3 202412am Tue, Jun 4 20241am Tue, Jun 4 20242am Tue, Jun 4 20243am Tue, Jun 4 20244am Tue, Jun 4 20245am Tue, Jun 4 20246am Tue, Jun 4 20247am Tue, Jun 4 20248am Tue, Jun 4 20249am Tue, Jun 4 202410am Tue, Jun 4 202411am Tue, Jun 4 202412pm Tue, Jun 4 20241pm Tue, Jun 4 20242pm Tue, Jun 4 20243pm Tue, Jun 4 20244pm Tue, Jun 4 20245pm Tue, Jun 4 20246pm Tue, Jun 4 20247pm Tue, Jun 4 20248pm Tue, Jun 4 20249pm Tue, Jun 4 202410pm Tue, Jun 4 202411pm Tue, Jun 4 202412am Wed, Jun 5 20241am Wed, Jun 5 20242am Wed, Jun 5 20243am Wed, Jun 5 20244am Wed, Jun 5 20245am Wed, Jun 5 20246am Wed, Jun 5 20247am Wed, Jun 5 2024

Date	05/31				06/01
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)	68	65	62	60	58	57	54	54	54	53	53	54	61	65	69	73	75	77	78	79	80	80	79	77
Dewpoint (°F)	43	44	44	44	44	43	42	42	43	44	44	45	47	46	47	47	47	48	47	47	47	47	49	51
Heat Index (°F)																	75	77	78	79	79	79	79	77
Surface Wind (mph)	3	2	2	2	2	3	3	3	3	3	3	3	3	3	2	2	3	3	3	5	5	5	5	5
Wind Dir	W	W	W	W	W	W	W	W	W	NW	NW	NW	NW	NW	NW	NW	W	W	SW	SW	SW	SW	SW	S
Gust
Sky Cover (%)	1	0	1	1	1	1	1	0	1	1	2	7	11	8	11	15	15	14	14	18	21	29	26	27
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 (%)	40	46	52	55	59	59	64	64	66	71	71	71	60	50	45	40	37	36	33	32	31	31	35	40
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date					06/02
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	72	70	68	67	65	64	63	63	62	63	63	65	68	71	74	76	77	77	77	76	76	74	72
Dewpoint (°F)	52	52	52	51	51	52	52	52	51	51	52	53	55	55	55	56	57	57	58	59	59	60	61	61
Heat Index (°F)																	76	77	77	77	76	76
Surface Wind (mph)	5	5	6	6	6	6	6	6	7	7	7	6	7	6	7	8	8	9	9	9	8	8	8	7
Wind Dir	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	SW	SW	SW	SW	SW	SW	W	W
Gust
Sky Cover (%)	28	28	29	28	30	35	41	48	55	60	62	64	65	68	75	79	80	85	84	82	79	77	76	72
Precipitation Potential (%)	0	0	0	0	0	0	1	1	1	1	1	1	17	17	17	17	17	17	29	29	29	29	29	29
Relative Humidity (%)	46	49	53	54	56	63	65	67	65	67	67	70	70	63	57	53	52	50	52	54	56	58	64	68
Rain	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc

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