Point Forecast: Chambersburg PA  39.93N 77.66W (Elev. 617 ft)	Last Update: 8:06 pm EST Dec 26, 2025

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Weather Elements Fire Weather Aviation Weather Temperature (°F) Dewpoint (°F) Wind Chill (°F) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Snow Freezing Rain Sleet 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: 12am Sat, Dec 27 20251am Sat, Dec 27 20252am Sat, Dec 27 20253am Sat, Dec 27 20254am Sat, Dec 27 20255am Sat, Dec 27 20256am Sat, Dec 27 20257am Sat, Dec 27 20258am Sat, Dec 27 20259am Sat, Dec 27 202510am Sat, Dec 27 202511am Sat, Dec 27 202512pm Sat, Dec 27 20251pm Sat, Dec 27 20252pm Sat, Dec 27 20253pm Sat, Dec 27 20254pm Sat, Dec 27 20255pm Sat, Dec 27 20256pm Sat, Dec 27 20257pm Sat, Dec 27 20258pm Sat, Dec 27 20259pm Sat, Dec 27 202510pm Sat, Dec 27 202511pm Sat, Dec 27 202512am Sun, Dec 28 20251am Sun, Dec 28 20252am Sun, Dec 28 20253am Sun, Dec 28 20254am Sun, Dec 28 20255am Sun, Dec 28 20256am Sun, Dec 28 20257am Sun, Dec 28 20258am Sun, Dec 28 20259am Sun, Dec 28 202510am Sun, Dec 28 202511am Sun, Dec 28 202512pm Sun, Dec 28 20251pm Sun, Dec 28 20252pm Sun, Dec 28 20253pm Sun, Dec 28 20254pm Sun, Dec 28 20255pm Sun, Dec 28 20256pm Sun, Dec 28 20257pm Sun, Dec 28 20258pm Sun, Dec 28 20259pm Sun, Dec 28 202510pm Sun, Dec 28 202511pm Sun, Dec 28 202512am Mon, Dec 29 20251am Mon, Dec 29 20252am Mon, Dec 29 20253am Mon, Dec 29 20254am Mon, Dec 29 20255am Mon, Dec 29 20256am Mon, Dec 29 20257am Mon, Dec 29 20258am Mon, Dec 29 20259am Mon, Dec 29 202510am Mon, Dec 29 202511am Mon, Dec 29 202512pm Mon, Dec 29 20251pm Mon, Dec 29 20252pm Mon, Dec 29 20253pm Mon, Dec 29 20254pm Mon, Dec 29 20255pm Mon, Dec 29 20256pm Mon, Dec 29 20257pm Mon, Dec 29 20258pm Mon, Dec 29 20259pm Mon, Dec 29 202510pm Mon, Dec 29 202511pm Mon, Dec 29 202512am Tue, Dec 30 20251am Tue, Dec 30 20252am Tue, Dec 30 20253am Tue, Dec 30 20254am Tue, Dec 30 20255am Tue, Dec 30 20256am Tue, Dec 30 20257am Tue, Dec 30 20258am Tue, Dec 30 20259am Tue, Dec 30 202510am Tue, Dec 30 202511am Tue, Dec 30 202512pm Tue, Dec 30 20251pm Tue, Dec 30 20252pm Tue, Dec 30 20253pm Tue, Dec 30 20254pm Tue, Dec 30 20255pm Tue, Dec 30 20256pm Tue, Dec 30 20257pm Tue, Dec 30 20258pm Tue, Dec 30 20259pm Tue, Dec 30 202510pm Tue, Dec 30 202511pm Tue, Dec 30 202512am Wed, Dec 31 20251am Wed, Dec 31 20252am Wed, Dec 31 20253am Wed, Dec 31 20254am Wed, Dec 31 20255am Wed, Dec 31 20256am Wed, Dec 31 20257am Wed, Dec 31 20258am Wed, Dec 31 20259am Wed, Dec 31 202510am Wed, Dec 31 202511am Wed, Dec 31 2025

Date	12/27
Hour (EST)	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Temperature (°F)	34	34	33	33	33	33	33	33	33	35	36	37	38	38	39	40	38	38	35	33	33	32	31	30
Dewpoint (°F)	31	31	31	31	31	30	31	31	32	31	31	31	30	31	31	31	30	30	29	29	29	29	28	28
Wind Chill (°F)	34	34	33	33	30	30	30	29	29	31	32	33	34	34	37	40	38	38	35	33	33	32	31	30
Surface Wind (mph)	2	2	2	2	3	3	3	5	5	5	5	5	5	5	3	2	2	2	2	2	1	1	1	1
Wind Dir	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	NE	NE	NE	NE	NE	NE	NE	E	E
Gust
Sky Cover (%)	98	100	92	83	72	73	82	80	79	59	66	64	52	46	45	47	39	49	49	51	46	57	68	70
Precipitation Potential (%)	11	9	8	7	5	5	5	5	0	0	0	0	0	0	0	0	0	0	0	4	4	4	4	4
Relative Humidity (%)	89	89	92	92	92	89	92	92	96	85	82	79	73	76	73	70	73	73	78	85	85	89	88	92
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date	12/28
Hour (EST)	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Temperature (°F)	29	29	28	28	29	29	29	30	31	33	35	37	39	40	41	42	42	42	41	40	40	41	41	42
Dewpoint (°F)	28	28	28	27	27	27	27	28	29	31	32	33	34	35	36	36	37	37	38	38	39	39	40	40
Wind Chill (°F)	29	29	28	28	29	29	29	30	31	30	32	33	35	36	37	39	39	39	39	38	38	38	38	39
Surface Wind (mph)	1	1	1	1	1	1	2	2	2	3	3	5	6	6	6	5	5	5	3	3	3	5	5	5
Wind Dir	SE	SE	SE	SE	SE	SE	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S
Gust
Sky Cover (%)	71	73	76	79	82	84	87	89	90	92	93	93	92	92	92	92	92	94	95	97	97	96	96	94
Precipitation Potential (%)	4	5	5	5	5	5	5	17	17	17	17	17	17	57	57	57	57	57	57	56	56	56	56	56
Relative Humidity (%)	96	96	100	96	92	92	92	92	92	92	89	85	82	82	82	79	82	82	89	92	96	93	96	93
Rain	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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