Point Forecast: Crystal Lake IL  42.23N 88.36W	Last Update: 2:56 am CDT Jun 17, 2026

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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: 2am Wed, Jun 17 20263am Wed, Jun 17 20264am Wed, Jun 17 20265am Wed, Jun 17 20266am Wed, Jun 17 20267am Wed, Jun 17 20268am Wed, Jun 17 20269am Wed, Jun 17 202610am Wed, Jun 17 202611am Wed, Jun 17 202612pm Wed, Jun 17 20261pm Wed, Jun 17 20262pm Wed, Jun 17 20263pm Wed, Jun 17 20264pm Wed, Jun 17 20265pm Wed, Jun 17 20266pm Wed, Jun 17 20267pm Wed, Jun 17 20268pm Wed, Jun 17 20269pm Wed, Jun 17 202610pm Wed, Jun 17 202611pm Wed, Jun 17 202612am Thu, Jun 18 20261am Thu, Jun 18 20262am Thu, Jun 18 20263am Thu, Jun 18 20264am Thu, Jun 18 20265am Thu, Jun 18 20266am Thu, Jun 18 20267am Thu, Jun 18 20268am Thu, Jun 18 20269am Thu, Jun 18 202610am Thu, Jun 18 202611am Thu, Jun 18 202612pm Thu, Jun 18 20261pm Thu, Jun 18 20262pm Thu, Jun 18 20263pm Thu, Jun 18 20264pm Thu, Jun 18 20265pm Thu, Jun 18 20266pm Thu, Jun 18 20267pm Thu, Jun 18 20268pm Thu, Jun 18 20269pm Thu, Jun 18 202610pm Thu, Jun 18 202611pm Thu, Jun 18 202612am Fri, Jun 19 20261am Fri, Jun 19 20262am Fri, Jun 19 20263am Fri, Jun 19 20264am Fri, Jun 19 20265am Fri, Jun 19 20266am Fri, Jun 19 20267am Fri, Jun 19 20268am Fri, Jun 19 20269am Fri, Jun 19 202610am Fri, Jun 19 202611am Fri, Jun 19 202612pm Fri, Jun 19 20261pm Fri, Jun 19 20262pm Fri, Jun 19 20263pm Fri, Jun 19 20264pm Fri, Jun 19 20265pm Fri, Jun 19 20266pm Fri, Jun 19 20267pm Fri, Jun 19 20268pm Fri, Jun 19 20269pm Fri, Jun 19 202610pm Fri, Jun 19 202611pm Fri, Jun 19 202612am Sat, Jun 20 20261am Sat, Jun 20 20262am Sat, Jun 20 20263am Sat, Jun 20 20264am Sat, Jun 20 20265am Sat, Jun 20 20266am Sat, Jun 20 20267am Sat, Jun 20 20268am Sat, Jun 20 20269am Sat, Jun 20 202610am Sat, Jun 20 202611am Sat, Jun 20 202612pm Sat, Jun 20 20261pm Sat, Jun 20 20262pm Sat, Jun 20 20263pm Sat, Jun 20 20264pm Sat, Jun 20 20265pm Sat, Jun 20 20266pm Sat, Jun 20 20267pm Sat, Jun 20 20268pm Sat, Jun 20 20269pm Sat, Jun 20 202610pm Sat, Jun 20 202611pm Sat, Jun 20 202612am Sun, Jun 21 20261am Sun, Jun 21 20262am Sun, Jun 21 20263am Sun, Jun 21 20264am Sun, Jun 21 20265am Sun, Jun 21 20266am Sun, Jun 21 20267am Sun, Jun 21 20268am Sun, Jun 21 20269am Sun, Jun 21 202610am Sun, Jun 21 202611am Sun, Jun 21 202612pm Sun, Jun 21 20261pm Sun, Jun 21 2026

Date	06/17																						06/18
Hour (CDT)	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01
Temperature (°F)	57	56	55	55	56	58	59	60	61	60	58	58	60	61	62	63	65	66	65	64	64	63	62	61
Dewpoint (°F)	51	50	50	49	49	50	51	52	53	54	55	57	59	60	60	61	62	62	62	61	60	60	59	57
Heat Index (°F)
Surface Wind (mph)	5	5	5	3	5	5	7	8	10	15	18	18	16	15	15	11	9	9	10	10	13	14	16	17
Wind Dir	WSW	WSW	WSW	WSW	SW	SSW	S	SSE	SSE	SSE	SE	SE	SSE	ENE	E	ESE	SSW	WSW	WSW	WSW	W	WSW	W	W
Gust									15	23	26	25	24	23	23	18	14						23	26
Sky Cover (%)	64	63	52	65	82	92	95	94	100	100	100	100	100	95	81	70	63	61	54	56	53	38	40	32
Precipitation Potential (%)	0	0	2	5	17	33	46	70	93	91	100	93	92	91	68	54	36	31	33	27	14	11	9	4
Relative Humidity (%)	81	81	81	80	78	77	76	75	75	81	88	93	96	98	93	93	89	88	91	89	89	90	89	88
Rain	--	--	--	--	SChc	Chc	Chc	Lkly	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Lkly	Chc	Chc	Chc	Chc	Chc	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	SChc	SChc	SChc	Chc	Chc	Chc	Lkly	Chc	SChc	--	--	--	--	--	--	--
Date																							06/19
Hour (CDT)	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01
Temperature (°F)	59	58	58	57	57	57	58	61	63	65	68	69	71	72	72	72	72	71	67	64	61	59	58	57
Dewpoint (°F)	56	56	55	55	54	54	54	56	57	58	58	58	58	58	58	58	58	58	58	57	56	55	54	54
Heat Index (°F)
Surface Wind (mph)	17	17	17	17	17	16	14	15	14	14	14	13	13	13	11	10	9	9	7	6	6	5	5	5
Wind Dir	W	W	W	W	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	W	W	WNW	WNW	WNW	W	W	WNW	WNW
Gust	28	28	26	28	26	22		20		21	21	21	20	20	18	15	14
Sky Cover (%)	24	51	52	75	82	89	78	76	77	78	70	45	27	48	22	50	59	39	39	23	7	6	4	3
Precipitation Potential (%)	3	4	5	7	7	3	2	0	0	0	0	0	7	1	0	0	0	4	4	4	4	4	4	0
Relative Humidity (%)	90	90	90	91	91	90	87	82	80	76	72	67	63	61	60	59	61	63	71	78	82	86	87	89
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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