Point Forecast: Chambersburg PA  39.93N 77.66W (Elev. 617 ft)	Last Update: 2:26 pm EDT Oct 21, 2026

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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: 4pm Wed, Oct 21 20265pm Wed, Oct 21 20266pm Wed, Oct 21 20267pm Wed, Oct 21 20268pm Wed, Oct 21 20269pm Wed, Oct 21 202610pm Wed, Oct 21 202611pm Wed, Oct 21 202612am Thu, Oct 22 20261am Thu, Oct 22 20262am Thu, Oct 22 20263am Thu, Oct 22 20264am Thu, Oct 22 20265am Thu, Oct 22 20266am Thu, Oct 22 20267am Thu, Oct 22 20268am Thu, Oct 22 20269am Thu, Oct 22 202610am Thu, Oct 22 202611am Thu, Oct 22 202612pm Thu, Oct 22 20261pm Thu, Oct 22 20262pm Thu, Oct 22 20263pm Thu, Oct 22 20264pm Thu, Oct 22 20265pm Thu, Oct 22 20266pm Thu, Oct 22 20267pm Thu, Oct 22 20268pm Thu, Oct 22 20269pm Thu, Oct 22 202610pm Thu, Oct 22 202611pm Thu, Oct 22 202612am Fri, Oct 23 20261am Fri, Oct 23 20262am Fri, Oct 23 20263am Fri, Oct 23 20264am Fri, Oct 23 20265am Fri, Oct 23 20266am Fri, Oct 23 20267am Fri, Oct 23 20268am Fri, Oct 23 20269am Fri, Oct 23 202610am Fri, Oct 23 202611am Fri, Oct 23 202612pm Fri, Oct 23 20261pm Fri, Oct 23 20262pm Fri, Oct 23 20263pm Fri, Oct 23 20264pm Fri, Oct 23 20265pm Fri, Oct 23 20266pm Fri, Oct 23 20267pm Fri, Oct 23 20268pm Fri, Oct 23 20269pm Fri, Oct 23 202610pm Fri, Oct 23 202611pm Fri, Oct 23 202612am Sat, Oct 24 20261am Sat, Oct 24 20262am Sat, Oct 24 20263am Sat, Oct 24 20264am Sat, Oct 24 20265am Sat, Oct 24 20266am Sat, Oct 24 20267am Sat, Oct 24 20268am Sat, Oct 24 20269am Sat, Oct 24 202610am Sat, Oct 24 202611am Sat, Oct 24 202612pm Sat, Oct 24 20261pm Sat, Oct 24 20262pm Sat, Oct 24 20263pm Sat, Oct 24 20264pm Sat, Oct 24 20265pm Sat, Oct 24 20266pm Sat, Oct 24 20267pm Sat, Oct 24 20268pm Sat, Oct 24 20269pm Sat, Oct 24 202610pm Sat, Oct 24 202611pm Sat, Oct 24 202612am Sun, Oct 25 20261am Sun, Oct 25 20262am Sun, Oct 25 20263am Sun, Oct 25 20264am Sun, Oct 25 20265am Sun, Oct 25 20266am Sun, Oct 25 20267am Sun, Oct 25 20268am Sun, Oct 25 20269am Sun, Oct 25 202610am Sun, Oct 25 202611am Sun, Oct 25 202612pm Sun, Oct 25 20261pm Sun, Oct 25 20262pm Sun, Oct 25 20263pm Sun, Oct 25 20264pm Sun, Oct 25 20265pm Sun, Oct 25 20266pm Sun, Oct 25 20267pm Sun, Oct 25 20268pm Sun, Oct 25 20269pm Sun, Oct 25 202610pm Sun, Oct 25 202611pm Sun, Oct 25 202612am Mon, Oct 26 20261am Mon, Oct 26 20262am Mon, Oct 26 20263am Mon, Oct 26 2026

Date	10/21								10/22
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)	65	65	61	57	52	50	48	46	44	42	40	39	38	38	37	36	37	44	53	56	60	62	63	65
Dewpoint (°F)	36	36	37	38	39	41	40	39	39	38	37	37	36	35	34	33	33	36	35	33	34	34	35	35
Wind Chill (°F)						50	48	46	44	42	40	39	38	38	34	33	34	42
Surface Wind (mph)	5	5	3	2	2	1	1	2	2	2	2	2	2	2	3	3	3	3	3	6	6	7	7	7
Wind Dir	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N
Gust
Sky Cover (%)	2	3	3	3	3	3	3	3	3	3	3	2	2	2	2	1	1	3	4	6	7	6	5	8
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 (%)	34	34	41	49	61	71	74	76	82	86	89	92	92	89	89	89	85	73	50	42	37	35	35	33
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date									10/23
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)	66	65	61	57	54	52	51	49	48	47	46	45	44	43	42	39	39	45	51	56	58	59	59	60
Dewpoint (°F)	35	34	37	40	43	43	44	44	44	44	44	43	42	42	41	39	39	38	37	36	35	34	33	33
Wind Chill (°F)								48	47	46	45	44	42	41	40	37	37	43
Surface Wind (mph)	7	6	5	3	3	3	3	3	3	3	3	3	3	3	3	3	3	5	6	6	6	5	3	3
Wind Dir	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	NE	NE	NE	NE	NE	NE
Gust
Sky Cover (%)	5	3	1	13	18	8	8	9	10	16	20	33	31	22	26	22	10	21	12	3	3	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 (%)	32	31	41	53	66	71	77	83	86	89	93	93	93	96	96	100	100	76	59	47	42	39	37	36
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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