Point Forecast: Chambersburg PA  39.93N 77.66W (Elev. 617 ft)	Last Update: 3:07 pm EDT May 23, 2025

[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 Trans. Wind  ktmphkm/hm/s 20ft Wind  ktmphkm/hm/s Vent Rate (x1000 mph-ft) Davis Stability Index Atmospheric Dispersion Index Low Visibility Occurrence Risk Index Ceiling Height Visibility Thunder Potential

48-Hour Period Starting: 4pm Fri, May 23 20255pm Fri, May 23 20256pm Fri, May 23 20257pm Fri, May 23 20258pm Fri, May 23 20259pm Fri, May 23 202510pm Fri, May 23 202511pm Fri, May 23 202512am Sat, May 24 20251am Sat, May 24 20252am Sat, May 24 20253am Sat, May 24 20254am Sat, May 24 20255am Sat, May 24 20256am Sat, May 24 20257am Sat, May 24 20258am Sat, May 24 20259am Sat, May 24 202510am Sat, May 24 202511am Sat, May 24 202512pm Sat, May 24 20251pm Sat, May 24 20252pm Sat, May 24 20253pm Sat, May 24 20254pm Sat, May 24 20255pm Sat, May 24 20256pm Sat, May 24 20257pm Sat, May 24 20258pm Sat, May 24 20259pm Sat, May 24 202510pm Sat, May 24 202511pm Sat, May 24 202512am Sun, May 25 20251am Sun, May 25 20252am Sun, May 25 20253am Sun, May 25 20254am Sun, May 25 20255am Sun, May 25 20256am Sun, May 25 20257am Sun, May 25 20258am Sun, May 25 20259am Sun, May 25 202510am Sun, May 25 202511am Sun, May 25 202512pm Sun, May 25 20251pm Sun, May 25 20252pm Sun, May 25 20253pm Sun, May 25 20254pm Sun, May 25 20255pm Sun, May 25 20256pm Sun, May 25 20257pm Sun, May 25 20258pm Sun, May 25 20259pm Sun, May 25 202510pm Sun, May 25 202511pm Sun, May 25 202512am Mon, May 26 20251am Mon, May 26 20252am Mon, May 26 20253am Mon, May 26 20254am Mon, May 26 20255am Mon, May 26 20256am Mon, May 26 20257am Mon, May 26 20258am Mon, May 26 20259am Mon, May 26 202510am Mon, May 26 202511am Mon, May 26 202512pm Mon, May 26 20251pm Mon, May 26 20252pm Mon, May 26 20253pm Mon, May 26 20254pm Mon, May 26 20255pm Mon, May 26 20256pm Mon, May 26 20257pm Mon, May 26 20258pm Mon, May 26 20259pm Mon, May 26 202510pm Mon, May 26 202511pm Mon, May 26 202512am Tue, May 27 20251am Tue, May 27 20252am Tue, May 27 20253am Tue, May 27 20254am Tue, May 27 20255am Tue, May 27 20256am Tue, May 27 20257am Tue, May 27 20258am Tue, May 27 20259am Tue, May 27 202510am Tue, May 27 202511am Tue, May 27 202512pm Tue, May 27 20251pm Tue, May 27 20252pm Tue, May 27 20253pm Tue, May 27 20254pm Tue, May 27 20255pm Tue, May 27 20256pm Tue, May 27 20257pm Tue, May 27 20258pm Tue, May 27 20259pm Tue, May 27 202510pm Tue, May 27 202511pm Tue, May 27 202512am Wed, May 28 20251am Wed, May 28 20252am Wed, May 28 20253am Wed, May 28 2025

Date	05/23								05/24
Hour (EDT)	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15
Temperature (°F)	61	61	58	57	54	52	50	49	48	47	46	45	44	44	44	45	50	52	56	58	59	61	62	63
Dewpoint (°F)	43	42	42	41	41	42	42	41	41	41	40	41	41	40	40	41	44	44	44	44	45	45	45	45
Heat Index (°F)
Surface Wind (mph)	14	13	11	9	6	6	5	3	3	3	3	3	3	3	5	6	6	7	8	9	10	10	10	10
Wind Dir	W	W	W	W	W	W	W	W	W	SW	SW	SW	SW	SW	SW	W	W	W	W	W	W	W	W	W
Gust	24	24	22	20															20	20	20	21	21	21
Sky Cover (%)	74	60	57	54	51	47	44	40	37	33	30	31	32	34	35	37	38	43	49	54	60	65	70	65
Precipitation Potential (%)	18	18	19	19	17	14	11	8	6	3	3	3	3	2	2	2	2	2	2	2	4	7	8	8
Relative Humidity (%)	51	49	55	55	61	69	74	74	77	79	79	86	89	86	86	86	80	74	64	59	60	56	54	52
Rain	SChc	SChc	SChc	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date									05/25
Hour (EDT)	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15
Temperature (°F)	63	64	63	61	60	57	55	53	50	49	48	47	45	44	46	48	50	54	57	61	63	64	66	67
Dewpoint (°F)	45	45	45	45	45	44	44	43	43	43	42	42	41	41	42	43	44	44	45	45	45	46	46	46
Heat Index (°F)
Surface Wind (mph)	10	10	9	7	5	3	2	2	2	2	2	2	2	2	2	2	2	3	5	6	7	7	7	7
Wind Dir	NW	NW	NW	NW	NW	NW	W	W	W	W	W	W	W	W	W	W	W	W	NW	NW	NW	NW	NW	NW
Gust	21	21	20
Sky Cover (%)	59	54	48	43	37	36	34	33	6	10	14	16	18	20	23	27	30	33	37	40	43	47	50	50
Precipitation Potential (%)	8	8	8	8	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	5	5
Relative Humidity (%)	52	50	52	56	58	62	66	69	77	80	80	83	86	89	86	83	80	69	64	56	52	52	48	47
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

International System of Units Forecast Discussion 7-Day Forecast Hourly Weather Graph Hazardous Weather Outlook Regional Weather Conditions Local Climate Snow and Ice Accumulation Forecasts River Stages Drought and Precipitation Forecast Model Data NWS State College Home