Point Forecast: McKnightstown PA  39.88N 77.32W (Elev. 188 m)	Last Update: 1:05 am EST Dec 16, 2025

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

48-Hour Period Starting: 1am Tue, Dec 16 20252am Tue, Dec 16 20253am Tue, Dec 16 20254am Tue, Dec 16 20255am Tue, Dec 16 20256am Tue, Dec 16 20257am Tue, Dec 16 20258am Tue, Dec 16 20259am Tue, Dec 16 202510am Tue, Dec 16 202511am Tue, Dec 16 202512pm Tue, Dec 16 20251pm Tue, Dec 16 20252pm Tue, Dec 16 20253pm Tue, Dec 16 20254pm Tue, Dec 16 20255pm Tue, Dec 16 20256pm Tue, Dec 16 20257pm Tue, Dec 16 20258pm Tue, Dec 16 20259pm Tue, Dec 16 202510pm Tue, Dec 16 202511pm Tue, Dec 16 202512am Wed, Dec 17 20251am Wed, Dec 17 20252am Wed, Dec 17 20253am Wed, Dec 17 20254am Wed, Dec 17 20255am Wed, Dec 17 20256am Wed, Dec 17 20257am Wed, Dec 17 20258am Wed, Dec 17 20259am Wed, Dec 17 202510am Wed, Dec 17 202511am Wed, Dec 17 202512pm Wed, Dec 17 20251pm Wed, Dec 17 20252pm Wed, Dec 17 20253pm Wed, Dec 17 20254pm Wed, Dec 17 20255pm Wed, Dec 17 20256pm Wed, Dec 17 20257pm Wed, Dec 17 20258pm Wed, Dec 17 20259pm Wed, Dec 17 202510pm Wed, Dec 17 202511pm Wed, Dec 17 202512am Thu, Dec 18 20251am Thu, Dec 18 20252am Thu, Dec 18 20253am Thu, Dec 18 20254am Thu, Dec 18 20255am Thu, Dec 18 20256am Thu, Dec 18 20257am Thu, Dec 18 20258am Thu, Dec 18 20259am Thu, Dec 18 202510am Thu, Dec 18 202511am Thu, Dec 18 202512pm Thu, Dec 18 20251pm Thu, Dec 18 20252pm Thu, Dec 18 20253pm Thu, Dec 18 20254pm Thu, Dec 18 20255pm Thu, Dec 18 20256pm Thu, Dec 18 20257pm Thu, Dec 18 20258pm Thu, Dec 18 20259pm Thu, Dec 18 202510pm Thu, Dec 18 202511pm Thu, Dec 18 202512am Fri, Dec 19 20251am Fri, Dec 19 20252am Fri, Dec 19 20253am Fri, Dec 19 20254am Fri, Dec 19 20255am Fri, Dec 19 20256am Fri, Dec 19 20257am Fri, Dec 19 20258am Fri, Dec 19 20259am Fri, Dec 19 202510am Fri, Dec 19 202511am Fri, Dec 19 202512pm Fri, Dec 19 20251pm Fri, Dec 19 20252pm Fri, Dec 19 20253pm Fri, Dec 19 20254pm Fri, Dec 19 20255pm Fri, Dec 19 20256pm Fri, Dec 19 20257pm Fri, Dec 19 20258pm Fri, Dec 19 20259pm Fri, Dec 19 202510pm Fri, Dec 19 202511pm Fri, Dec 19 202512am Sat, Dec 20 20251am Sat, Dec 20 20252am Sat, Dec 20 20253am Sat, Dec 20 20254am Sat, Dec 20 20255am Sat, Dec 20 20256am Sat, Dec 20 20257am Sat, Dec 20 20258am Sat, Dec 20 20259am Sat, Dec 20 202510am Sat, Dec 20 202511am Sat, Dec 20 202512pm Sat, Dec 20 2025

Date	12/16																							12/17
Hour (EST)	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00
Temperature (°C)	-9	-9	-9	-9	-9	-9	-9	-8	-6	-3	-2	-1	1	1	1	1	-1	-2	-3	-4	-4	-5	-4	-4
Dewpoint (°C)	-13	-13	-13	-13	-13	-14	-13	-13	-12	-11	-11	-10	-9	-9	-9	-9	-9	-8	-9	-9	-9	-9	-9	-9
Wind Chill (°C)	-9	-9	-9	-9	-9	-9	-9	-8	-6	-3	-2	-1	1	1	1	1	-1	-2	-3	-4	-4	-5	-4	-4
Surface Wind (mph)	0	0	0	0	0	0	0	0	0	1	2	2	2	2	2	2	2	2	2	2	2	2	2	2
Wind Dir	W	W	W	W	W	W	NW	W	SW	W	W	SW	SW	SW	SW	S	S	S	S	S	S	S	S	S
Gust
Sky Cover (%)	21	12	16	10	15	8	12	7	7	16	23	35	33	28	21	25	33	38	17	14	14	13	12	17
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 (%)	73	73	73	70	70	70	70	70	62	55	53	49	47	47	49	47	53	63	63	68	68	74	71	71
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																								12/18
Hour (EST)	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00
Temperature (°C)	-4	-4	-4	-4	-4	-4	-3	-2	1	3	5	6	7	8	8	7	6	4	2	1	1	0	-1	-2
Dewpoint (°C)	-9	-9	-8	-8	-8	-7	-6	-5	-3	-2	-1	-1	0	1	1	1	0	-1	-1	-2	-2	-2	-3	-3
Wind Chill (°C)	-4	-4	-4	-4	-4	-4	-5	-4	-2	0	2	3	4	5	5	4	3	2	2	1	1	0	-1	-2
Surface Wind (mph)	2	2	2	2	2	2	3	5	6	6	8	9	10	10	9	8	7	5	2	2	1	1	1	0
Wind Dir	S	S	S	S	S	S	SW	SW	SW	SW	SW	SW	W	W	W	W	W	W	W	W	W	W	W	W
Gust
Sky Cover (%)	18	27	28	35	37	51	67	69	76	82	82	83	83	71	58	46	42	39	35	35	34	34	34	34
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1
Relative Humidity (%)	71	71	74	74	74	78	78	78	75	70	65	62	60	60	60	65	67	73	79	82	85	85	85	92
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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