Point Forecast: Westchester IL  41.84N 87.88W	Last Update: 6:26 am CDT May 18, 2025

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Weather Elements Fire Weather Probabilistic Forecasts (Experimental) Description | Survey 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) Quantitative Precipitation  3-hr6-hr12-hr24-hr   info     0.100.250.501.00 Snowfall  3-hr6-hr12-hr24-hr   info     0.1in1in3in6in12in

48-Hour Period Starting: 7am Sun, May 18 20258am Sun, May 18 20259am Sun, May 18 202510am Sun, May 18 202511am Sun, May 18 202512pm Sun, May 18 20251pm Sun, May 18 20252pm Sun, May 18 20253pm Sun, May 18 20254pm Sun, May 18 20255pm Sun, May 18 20256pm Sun, May 18 20257pm Sun, May 18 20258pm Sun, May 18 20259pm Sun, May 18 202510pm Sun, May 18 202511pm Sun, May 18 202512am Mon, May 19 20251am Mon, May 19 20252am Mon, May 19 20253am Mon, May 19 20254am Mon, May 19 20255am Mon, May 19 20256am Mon, May 19 20257am Mon, May 19 20258am Mon, May 19 20259am Mon, May 19 202510am Mon, May 19 202511am Mon, May 19 202512pm Mon, May 19 20251pm Mon, May 19 20252pm Mon, May 19 20253pm Mon, May 19 20254pm Mon, May 19 20255pm Mon, May 19 20256pm Mon, May 19 20257pm Mon, May 19 20258pm Mon, May 19 20259pm Mon, May 19 202510pm Mon, May 19 202511pm Mon, May 19 202512am Tue, May 20 20251am Tue, May 20 20252am Tue, May 20 20253am Tue, May 20 20254am Tue, May 20 20255am Tue, May 20 20256am Tue, May 20 20257am Tue, May 20 20258am Tue, May 20 20259am Tue, May 20 202510am Tue, May 20 202511am Tue, May 20 202512pm Tue, May 20 20251pm Tue, May 20 20252pm Tue, May 20 20253pm Tue, May 20 20254pm Tue, May 20 20255pm Tue, May 20 20256pm Tue, May 20 20257pm Tue, May 20 20258pm Tue, May 20 20259pm Tue, May 20 202510pm Tue, May 20 202511pm Tue, May 20 202512am Wed, May 21 20251am Wed, May 21 20252am Wed, May 21 20253am Wed, May 21 20254am Wed, May 21 20255am Wed, May 21 20256am Wed, May 21 20257am Wed, May 21 20258am Wed, May 21 20259am Wed, May 21 202510am Wed, May 21 202511am Wed, May 21 202512pm Wed, May 21 20251pm Wed, May 21 20252pm Wed, May 21 20253pm Wed, May 21 20254pm Wed, May 21 20255pm Wed, May 21 20256pm Wed, May 21 20257pm Wed, May 21 20258pm Wed, May 21 20259pm Wed, May 21 202510pm Wed, May 21 202511pm Wed, May 21 202512am Thu, May 22 20251am Thu, May 22 20252am Thu, May 22 20253am Thu, May 22 20254am Thu, May 22 20255am Thu, May 22 20256am Thu, May 22 20257am Thu, May 22 20258am Thu, May 22 20259am Thu, May 22 202510am Thu, May 22 202511am Thu, May 22 202512pm Thu, May 22 20251pm Thu, May 22 20252pm Thu, May 22 20253pm Thu, May 22 20254pm Thu, May 22 20255pm Thu, May 22 20256pm Thu, May 22 2025

Date	05/18																	05/19
Hour (CDT)	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06
Temperature (°F)	54	56	58	61	61	62	62	62	62	61	59	57	54	52	51	49	48	47	46	45	45	45	45	44
Dewpoint (°F)	44	44	44	45	45	45	45	45	44	43	42	41	40	40	39	39	39	38	38	38	38	38	38	39
Heat Index (°F)
Surface Wind (mph)	8	8	8	8	8	9	9	10	10	11	11	13	13	13	13	13	13	13	13	11	11	11	11	13
Wind Dir	NW	NNW	NNW	N	N	NNE	NE	NE	NE	ENE	ENE	NE	NE	NE	ENE	ENE	ENE	NE	NE	NE	NE	NE	NE	NE
Gust									15	16	17	18	20	20	18	18	18	18	18	18	18	18	18	18
Sky Cover (%)	58	65	61	57	52	53	54	49	44	40	40	40	40	33	26	20	24	28	32	39	46	53	59	65
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 (%)	69	64	60	56	56	54	54	54	52	51	53	55	59	63	63	68	71	71	73	76	76	76	76	82
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																		05/20
Hour (CDT)	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06
Temperature (°F)	45	47	49	51	54	56	58	59	60	60	59	58	58	57	57	56	56	56	56	56	54	53	50	48
Dewpoint (°F)	39	39	40	40	41	41	42	42	42	42	42	42	42	42	43	44	44	44	44	43	42	41	40	40
Heat Index (°F)
Surface Wind (mph)	13	13	14	14	14	15	15	15	16	16	16	15	15	14	14	14	14	15	16	17	17	18	18	20
Wind Dir	NE	NE	NE	ENE	ENE	ENE	ENE	ENE	ENE	NE	NE	NE	NE	ENE	ENE	ENE	ENE	E	E	E	E	E	E	E
Gust	18	20	20	21	21	22	22	23	24	24	24	24	23	23	23	23	24	24	25	26	29	30	30	30
Sky Cover (%)	71	71	71	70	71	73	74	71	68	65	63	60	58	64	70	76	78	79	81	84	87	90	89	88
Precipitation Potential (%)	9	9	9	9	9	9	15	15	15	15	15	15	25	25	25	25	25	25	62	62	62	62	62	62
Relative Humidity (%)	79	74	71	66	61	57	55	53	51	51	53	55	55	57	59	64	64	64	64	62	64	64	68	74
Rain	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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