Point Forecast: Chambersburg PA  39.93N 77.66W (Elev. 617 ft)	Last Update: 8:06 am EDT Jun 23, 2026

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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: 10am Tue, Jun 23 202611am Tue, Jun 23 202612pm Tue, Jun 23 20261pm Tue, Jun 23 20262pm Tue, Jun 23 20263pm Tue, Jun 23 20264pm Tue, Jun 23 20265pm Tue, Jun 23 20266pm Tue, Jun 23 20267pm Tue, Jun 23 20268pm Tue, Jun 23 20269pm Tue, Jun 23 202610pm Tue, Jun 23 202611pm Tue, Jun 23 202612am Wed, Jun 24 20261am Wed, Jun 24 20262am Wed, Jun 24 20263am Wed, Jun 24 20264am Wed, Jun 24 20265am Wed, Jun 24 20266am Wed, Jun 24 20267am Wed, Jun 24 20268am Wed, Jun 24 20269am Wed, Jun 24 202610am Wed, Jun 24 202611am Wed, Jun 24 202612pm Wed, Jun 24 20261pm Wed, Jun 24 20262pm Wed, Jun 24 20263pm Wed, Jun 24 20264pm Wed, Jun 24 20265pm Wed, Jun 24 20266pm Wed, Jun 24 20267pm Wed, Jun 24 20268pm Wed, Jun 24 20269pm Wed, Jun 24 202610pm Wed, Jun 24 202611pm Wed, Jun 24 202612am Thu, Jun 25 20261am Thu, Jun 25 20262am Thu, Jun 25 20263am Thu, Jun 25 20264am Thu, Jun 25 20265am Thu, Jun 25 20266am Thu, Jun 25 20267am Thu, Jun 25 20268am Thu, Jun 25 20269am Thu, Jun 25 202610am Thu, Jun 25 202611am Thu, Jun 25 202612pm Thu, Jun 25 20261pm Thu, Jun 25 20262pm Thu, Jun 25 20263pm Thu, Jun 25 20264pm Thu, Jun 25 20265pm Thu, Jun 25 20266pm Thu, Jun 25 20267pm Thu, Jun 25 20268pm Thu, Jun 25 20269pm Thu, Jun 25 202610pm Thu, Jun 25 202611pm Thu, Jun 25 202612am Fri, Jun 26 20261am Fri, Jun 26 20262am Fri, Jun 26 20263am Fri, Jun 26 20264am Fri, Jun 26 20265am Fri, Jun 26 20266am Fri, Jun 26 20267am Fri, Jun 26 20268am Fri, Jun 26 20269am Fri, Jun 26 202610am Fri, Jun 26 202611am Fri, Jun 26 202612pm Fri, Jun 26 20261pm Fri, Jun 26 20262pm Fri, Jun 26 20263pm Fri, Jun 26 20264pm Fri, Jun 26 20265pm Fri, Jun 26 20266pm Fri, Jun 26 20267pm Fri, Jun 26 20268pm Fri, Jun 26 20269pm Fri, Jun 26 202610pm Fri, Jun 26 202611pm Fri, Jun 26 202612am Sat, Jun 27 20261am Sat, Jun 27 20262am Sat, Jun 27 20263am Sat, Jun 27 20264am Sat, Jun 27 20265am Sat, Jun 27 20266am Sat, Jun 27 20267am Sat, Jun 27 20268am Sat, Jun 27 20269am Sat, Jun 27 202610am Sat, Jun 27 202611am Sat, Jun 27 202612pm Sat, Jun 27 20261pm Sat, Jun 27 20262pm Sat, Jun 27 20263pm Sat, Jun 27 20264pm Sat, Jun 27 20265pm Sat, Jun 27 20266pm Sat, Jun 27 20267pm Sat, Jun 27 20268pm Sat, Jun 27 20269pm Sat, Jun 27 2026

Date	06/23														06/24
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 (°F)	68	69	70	70	71	72	75	75	76	75	74	70	68	66	65	63	62	60	59	58	57	59	63	67
Dewpoint (°F)	63	62	62	62	61	61	60	60	59	59	58	58	57	56	55	54	53	54	54	55	55	56	56	57
Heat Index (°F)							75	75	76	75
Surface Wind (mph)	7	7	7	8	8	8	8	8	7	6	3	3	3	3	3	3	3	2	2	2	2	2	2	3
Wind Dir	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	NW	NW	NW	NW
Gust
Sky Cover (%)	97	96	94	92	90	79	68	58	46	34	22	18	15	12	9	6	3	3	3	4	4	5	5	1
Precipitation Potential (%)	55	47	32	18	4	3	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	84	78	76	76	71	68	60	60	56	58	57	66	68	70	70	72	72	81	83	90	93	90	78	70
Rain	Lkly	Chc	Chc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date															06/25
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 (°F)	72	75	77	79	80	81	82	82	83	81	78	73	69	67	65	63	62	61	60	60	61	63	66	70
Dewpoint (°F)	57	56	55	55	55	54	54	53	54	55	57	57	57	56	56	55	55	54	54	54	55	56	57	58
Heat Index (°F)		75	77	79	80	81	81	81	82	81	78
Surface Wind (mph)	3	5	5	3	3	3	3	3	2	1	1	0	0	0	0	0	0	0	0	0	0	0	0	1
Wind Dir	NW	NW	NW	NW	NW	NW	W	W	W	W	W	SW	SW	N	N	N	N	N	N	N	N	N	N	S
Gust
Sky Cover (%)	3	3	17	22	38	42	23	19	15	24	38	17	21	24	23	22	21	25	29	33	32	32	31	30
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 (%)	59	52	47	44	42	39	38	37	37	41	48	57	66	68	73	75	78	78	81	81	81	78	73	66
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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