Point Forecast: Chambersburg PA  39.93N 77.66W (Elev. 188 m)	Last Update: 8:55 am EDT Jun 21, 2025

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Weather Elements Fire Weather Aviation Weather Temperature (°C) Dewpoint (°C) Heat Index (°C) 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-m) Davis Stability Index Atmospheric Dispersion Index Low Visibility Occurrence Risk Index Ceiling Height Visibility Thunder Potential

48-Hour Period Starting: 10am Sat, Jun 21 202511am Sat, Jun 21 202512pm Sat, Jun 21 20251pm Sat, Jun 21 20252pm Sat, Jun 21 20253pm Sat, Jun 21 20254pm Sat, Jun 21 20255pm Sat, Jun 21 20256pm Sat, Jun 21 20257pm Sat, Jun 21 20258pm Sat, Jun 21 20259pm Sat, Jun 21 202510pm Sat, Jun 21 202511pm Sat, Jun 21 202512am Sun, Jun 22 20251am Sun, Jun 22 20252am Sun, Jun 22 20253am Sun, Jun 22 20254am Sun, Jun 22 20255am Sun, Jun 22 20256am Sun, Jun 22 20257am Sun, Jun 22 20258am Sun, Jun 22 20259am Sun, Jun 22 202510am Sun, Jun 22 202511am Sun, Jun 22 202512pm Sun, Jun 22 20251pm Sun, Jun 22 20252pm Sun, Jun 22 20253pm Sun, Jun 22 20254pm Sun, Jun 22 20255pm Sun, Jun 22 20256pm Sun, Jun 22 20257pm Sun, Jun 22 20258pm Sun, Jun 22 20259pm Sun, Jun 22 202510pm Sun, Jun 22 202511pm Sun, Jun 22 202512am Mon, Jun 23 20251am Mon, Jun 23 20252am Mon, Jun 23 20253am Mon, Jun 23 20254am Mon, Jun 23 20255am Mon, Jun 23 20256am Mon, Jun 23 20257am Mon, Jun 23 20258am Mon, Jun 23 20259am Mon, Jun 23 202510am Mon, Jun 23 202511am Mon, Jun 23 202512pm Mon, Jun 23 20251pm Mon, Jun 23 20252pm Mon, Jun 23 20253pm Mon, Jun 23 20254pm Mon, Jun 23 20255pm Mon, Jun 23 20256pm Mon, Jun 23 20257pm Mon, Jun 23 20258pm Mon, Jun 23 20259pm Mon, Jun 23 202510pm Mon, Jun 23 202511pm Mon, Jun 23 202512am Tue, Jun 24 20251am Tue, Jun 24 20252am Tue, Jun 24 20253am Tue, Jun 24 20254am Tue, Jun 24 20255am Tue, Jun 24 20256am Tue, Jun 24 20257am Tue, Jun 24 20258am Tue, Jun 24 20259am Tue, Jun 24 202510am Tue, Jun 24 202511am Tue, Jun 24 202512pm Tue, Jun 24 20251pm Tue, Jun 24 20252pm Tue, Jun 24 20253pm Tue, Jun 24 20254pm Tue, Jun 24 20255pm Tue, Jun 24 20256pm Tue, Jun 24 20257pm Tue, Jun 24 20258pm Tue, Jun 24 20259pm Tue, Jun 24 202510pm Tue, Jun 24 202511pm Tue, Jun 24 202512am Wed, Jun 25 20251am Wed, Jun 25 20252am Wed, Jun 25 20253am Wed, Jun 25 20254am Wed, Jun 25 20255am Wed, Jun 25 20256am Wed, Jun 25 20257am Wed, Jun 25 20258am Wed, Jun 25 20259am Wed, Jun 25 202510am Wed, Jun 25 202511am Wed, Jun 25 202512pm Wed, Jun 25 20251pm Wed, Jun 25 20252pm Wed, Jun 25 20253pm Wed, Jun 25 20254pm Wed, Jun 25 20255pm Wed, Jun 25 20256pm Wed, Jun 25 20257pm Wed, Jun 25 20258pm Wed, Jun 25 20259pm Wed, Jun 25 2025

Date	06/21														06/22
Hour (EDT)	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09
Temperature (°C)	27	29	30	31	31	32	32	32	31	31	29	27	26	24	23	23	23	22	21	21	20	21	23	25
Dewpoint (°C)	20	20	20	20	19	19	19	19	19	19	21	21	20	19	19	19	19	19	18	18	18	19	20	20
Heat Index (°C)	29	31	32	33	33	33	33	34	32	32	31	28	26	24										25
Surface Wind (mph)	1	2	3	3	5	5	6	6	5	3	2	2	2	2	2	2	2	2	2	2	2	2	3	5
Wind Dir	SW	SW	SW	SW	SW	SW	SW	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	SW	SW
Gust
Sky Cover (%)	6	26	26	33	26	19	22	25	28	31	32	32	18	13	8	6	11	10	8	2	2	11	1	4
Precipitation Potential (%)	0	1	1	1	1	1	1	0	3	5	3	3	3	2	2	1	1	1	1	1	1	1	0	0
Relative Humidity (%)	65	59	55	53	50	47	48	45	48	52	61	69	71	74	79	79	79	84	84	84	90	87	82	74
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date															06/23
Hour (EDT)	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09
Temperature (°C)	28	31	32	33	34	35	35	36	34	33	32	31	29	27	26	26	24	24	23	23	24	25	26	28
Dewpoint (°C)	21	21	21	21	21	21	21	22	22	23	23	23	23	22	22	22	22	22	21	21	22	22	23	23
Heat Index (°C)	31	33	34	36	37	39	39	40	39	38	37	34	32	29	26	26	24	24			24	25	26	32
Surface Wind (mph)	5	6	6	7	7	7	7	7	6	5	3	2	2	2	2	2	2	2	1	1	1	1	1	2
Wind Dir	SW	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W
Gust
Sky Cover (%)	3	3	7	12	13	13	14	14	13	12	11	9	7	6	5	5	5	5	5	5	5	4	4	7
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 (%)	63	55	52	47	44	45	45	45	49	54	60	63	70	74	79	79	85	87	87	87	87	85	85	72
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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