Point Forecast: Crystal Lake IL  42.23N 88.36W	Last Update: 11:01 pm CDT May 14, 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: 11pm Thu, May 14 202612am Fri, May 15 20261am Fri, May 15 20262am Fri, May 15 20263am Fri, May 15 20264am Fri, May 15 20265am Fri, May 15 20266am Fri, May 15 20267am Fri, May 15 20268am Fri, May 15 20269am Fri, May 15 202610am Fri, May 15 202611am Fri, May 15 202612pm Fri, May 15 20261pm Fri, May 15 20262pm Fri, May 15 20263pm Fri, May 15 20264pm Fri, May 15 20265pm Fri, May 15 20266pm Fri, May 15 20267pm Fri, May 15 20268pm Fri, May 15 20269pm Fri, May 15 202610pm Fri, May 15 202611pm Fri, May 15 202612am Sat, May 16 20261am Sat, May 16 20262am Sat, May 16 20263am Sat, May 16 20264am Sat, May 16 20265am Sat, May 16 20266am Sat, May 16 20267am Sat, May 16 20268am Sat, May 16 20269am Sat, May 16 202610am Sat, May 16 202611am Sat, May 16 202612pm Sat, May 16 20261pm Sat, May 16 20262pm Sat, May 16 20263pm Sat, May 16 20264pm Sat, May 16 20265pm Sat, May 16 20266pm Sat, May 16 20267pm Sat, May 16 20268pm Sat, May 16 20269pm Sat, May 16 202610pm Sat, May 16 202611pm Sat, May 16 202612am Sun, May 17 20261am Sun, May 17 20262am Sun, May 17 20263am Sun, May 17 20264am Sun, May 17 20265am Sun, May 17 20266am Sun, May 17 20267am Sun, May 17 20268am Sun, May 17 20269am Sun, May 17 202610am Sun, May 17 202611am Sun, May 17 202612pm Sun, May 17 20261pm Sun, May 17 20262pm Sun, May 17 20263pm Sun, May 17 20264pm Sun, May 17 20265pm Sun, May 17 20266pm Sun, May 17 20267pm Sun, May 17 20268pm Sun, May 17 20269pm Sun, May 17 202610pm Sun, May 17 202611pm Sun, May 17 202612am Mon, May 18 20261am Mon, May 18 20262am Mon, May 18 20263am Mon, May 18 20264am Mon, May 18 20265am Mon, May 18 20266am Mon, May 18 20267am Mon, May 18 20268am Mon, May 18 20269am Mon, May 18 202610am Mon, May 18 202611am Mon, May 18 202612pm Mon, May 18 20261pm Mon, May 18 20262pm Mon, May 18 20263pm Mon, May 18 20264pm Mon, May 18 20265pm Mon, May 18 20266pm Mon, May 18 20267pm Mon, May 18 20268pm Mon, May 18 20269pm Mon, May 18 202610pm Mon, May 18 202611pm Mon, May 18 202612am Tue, May 19 20261am Tue, May 19 20262am Tue, May 19 20263am Tue, May 19 20264am Tue, May 19 20265am Tue, May 19 20266am Tue, May 19 20267am Tue, May 19 20268am Tue, May 19 20269am Tue, May 19 202610am Tue, May 19 2026

Date	05/14	05/15
Hour (CDT)	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22
Temperature (°F)	51	50	50	50	49	50	50	50	51	53	55	57	60	63	65	68	70	72	73	73	72	68	66	63
Dewpoint (°F)	31	32	33	34	35	37	38	40	42	43	45	47	48	49	50	51	51	52	52	53	53	53	53	52
Heat Index (°F)
Surface Wind (mph)	8	8	8	8	8	9	10	13	14	16	17	17	18	18	18	17	17	16	15	14	13	11	11	11
Wind Dir	SE	SSE	SSE	S	S	S	S	S	S	S	S	S	SSW	SSW	SSW	SSW	SSW	S	S	S	S	S	S	S
Gust	14	14	14	14	14	15	17	20	23	24	26	28	28	29	28	28	25	24	23	22	21	20	18	17
Sky Cover (%)	56	63	69	62	74	81	81	85	80	77	78	69	64	58	50	42	35	25	19	15	13	9	17	20
Precipitation Potential (%)	6	11	32	16	15	22	30	25	20	12	3	2	2	1	0	0	0	0	0	0	1	1	2	2
Relative Humidity (%)	47	50	53	55	58	60	64	68	71	69	69	67	64	61	58	55	52	49	48	49	51	57	64	67
Rain	--	--	Chc	SChc	SChc	SChc	Chc	Chc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date		05/16
Hour (CDT)	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22
Temperature (°F)	62	62	60	61	60	59	59	59	60	64	67	71	74	77	79	81	82	83	82	81	78	74	70	66
Dewpoint (°F)	52	53	53	53	53	54	54	55	56	58	60	61	62	62	61	61	61	60	60	61	61	60	59	58
Heat Index (°F)														77	81	82	83	83	83	81	78
Surface Wind (mph)	11	11	10	10	9	8	8	8	9	9	9	9	9	9	8	8	8	8	7	6	5	5	5	5
Wind Dir	S	S	S	S	SSW	SSW	S	SSW	SSW	WSW	WSW	WSW	WSW	WSW	WSW	W	WSW	WSW	W	W	S	SSE	SSE	SSE
Gust	17	17	17	16	15	14	13	13		14	16	16	16	15	13	13	13
Sky Cover (%)	33	33	39	53	51	69	54	77	79	80	77	74	64	55	45	44	44	43	43	44	44	42	41	39
Precipitation Potential (%)	7	9	50	50	50	50	50	50	45	45	45	45	45	45	34	34	34	34	34	34	62	62	62	62
Relative Humidity (%)	70	73	76	74	77	83	84	86	88	82	77	71	65	59	54	50	48	47	48	51	56	61	68	75
Rain	--	--	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Lkly	Lkly	Lkly	Lkly
Thunder	--	--	SChc	SChc	SChc	SChc	SChc	SChc	--	--	--	--	--	--	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Chc

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