Point Forecast: Chicago IL  41.86N 87.68W	Last Update: 3:46 am CDT Jul 21, 2026

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Weather Elements Fire Weather Probabilistic Forecasts (Experimental) Description | Survey Temperature (°C) Dewpoint (°C) Heat Index (°C) 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-m) 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: 5am Tue, Jul 21 20266am Tue, Jul 21 20267am Tue, Jul 21 20268am Tue, Jul 21 20269am Tue, Jul 21 202610am Tue, Jul 21 202611am Tue, Jul 21 202612pm Tue, Jul 21 20261pm Tue, Jul 21 20262pm Tue, Jul 21 20263pm Tue, Jul 21 20264pm Tue, Jul 21 20265pm Tue, Jul 21 20266pm Tue, Jul 21 20267pm Tue, Jul 21 20268pm Tue, Jul 21 20269pm Tue, Jul 21 202610pm Tue, Jul 21 202611pm Tue, Jul 21 202612am Wed, Jul 22 20261am Wed, Jul 22 20262am Wed, Jul 22 20263am Wed, Jul 22 20264am Wed, Jul 22 20265am Wed, Jul 22 20266am Wed, Jul 22 20267am Wed, Jul 22 20268am Wed, Jul 22 20269am Wed, Jul 22 202610am Wed, Jul 22 202611am Wed, Jul 22 202612pm Wed, Jul 22 20261pm Wed, Jul 22 20262pm Wed, Jul 22 20263pm Wed, Jul 22 20264pm Wed, Jul 22 20265pm Wed, Jul 22 20266pm Wed, Jul 22 20267pm Wed, Jul 22 20268pm Wed, Jul 22 20269pm Wed, Jul 22 202610pm Wed, Jul 22 202611pm Wed, Jul 22 202612am Thu, Jul 23 20261am Thu, Jul 23 20262am Thu, Jul 23 20263am Thu, Jul 23 20264am Thu, Jul 23 20265am Thu, Jul 23 20266am Thu, Jul 23 20267am Thu, Jul 23 20268am Thu, Jul 23 20269am Thu, Jul 23 202610am Thu, Jul 23 202611am Thu, Jul 23 202612pm Thu, Jul 23 20261pm Thu, Jul 23 20262pm Thu, Jul 23 20263pm Thu, Jul 23 20264pm Thu, Jul 23 20265pm Thu, Jul 23 20266pm Thu, Jul 23 20267pm Thu, Jul 23 20268pm Thu, Jul 23 20269pm Thu, Jul 23 202610pm Thu, Jul 23 202611pm Thu, Jul 23 202612am Fri, Jul 24 20261am Fri, Jul 24 20262am Fri, Jul 24 20263am Fri, Jul 24 20264am Fri, Jul 24 20265am Fri, Jul 24 20266am Fri, Jul 24 20267am Fri, Jul 24 20268am Fri, Jul 24 20269am Fri, Jul 24 202610am Fri, Jul 24 202611am Fri, Jul 24 202612pm Fri, Jul 24 20261pm Fri, Jul 24 20262pm Fri, Jul 24 20263pm Fri, Jul 24 20264pm Fri, Jul 24 20265pm Fri, Jul 24 20266pm Fri, Jul 24 20267pm Fri, Jul 24 20268pm Fri, Jul 24 20269pm Fri, Jul 24 202610pm Fri, Jul 24 202611pm Fri, Jul 24 202612am Sat, Jul 25 20261am Sat, Jul 25 20262am Sat, Jul 25 20263am Sat, Jul 25 20264am Sat, Jul 25 20265am Sat, Jul 25 20266am Sat, Jul 25 20267am Sat, Jul 25 20268am Sat, Jul 25 20269am Sat, Jul 25 202610am Sat, Jul 25 202611am Sat, Jul 25 202612pm Sat, Jul 25 20261pm Sat, Jul 25 20262pm Sat, Jul 25 20263pm Sat, Jul 25 20264pm Sat, Jul 25 2026

Date	07/21																			07/22
Hour (CDT)	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04
Temperature (°C)	23	23	23	24	25	27	28	29	30	30	29	29	28	27	25	23	22	21	20	19	19	18	18	17
Dewpoint (°C)	21	21	21	21	21	20	19	18	17	16	16	16	16	17	17	18	18	18	17	16	15	14	14	13
Heat Index (°C)				24	25	28	29	30	30	30	29	29	28	28	25
Surface Wind (mph)	13	11	11	11	13	14	15	16	16	16	16	16	16	16	15	14	13	13	13	15	15	14	11	11
Wind Dir	W	W	W	W	W	W	WNW	WNW	NW	NW	NW	NW	NW	NNW	N	N	N	N	NNE	NNE	N	N	N	N
Gust							23	24	24	24	24			25	24	23	23	22	23	24	24	23	22	22
Sky Cover (%)	50	38	31	31	31	31	31	31	33	40	53	57	51	61	62	69	63	74	77	65	62	59	54	57
Precipitation Potential (%)	33	33	4	4	4	0	0	0	0	0	0	5	5	5	23	23	23	20	20	20	7	7	7	5
Relative Humidity (%)	90	91	89	83	76	68	58	50	46	44	43	44	45	53	61	75	79	82	84	81	79	78	78	78
Rain	Chc	Chc	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	--	--	--	--
Thunder	Chc	Chc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																				07/23
Hour (CDT)	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04
Temperature (°C)	17	16	16	17	17	18	19	20	21	21	21	21	21	21	21	20	19	18	18	17	17	17	17	17
Dewpoint (°C)	13	12	12	11	11	10	9	9	9	9	9	9	8	8	9	10	10	11	11	11	11	11	11	11
Heat Index (°C)
Surface Wind (mph)	11	11	11	13	13	13	13	13	14	14	14	13	13	11	10	8	7	5	3	3	3	2	2	2
Wind Dir	NNW	NNW	NNW	NNW	N	N	N	N	N	N	N	N	N	NNE	NNE	N	N	N	N	N	NNW	NW	WNW	WNW
Gust	21	21	21	21
Sky Cover (%)	46	38	34	33	38	49	49	42	36	22	15	16	17	21	26	14	12	16	17	16	13	11	11	10
Precipitation Potential (%)	5	5	8	8	8	2	2	2	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	79	78	75	70	64	58	53	50	49	46	45	45	43	44	48	52	55	59	63	66	67	68	68	68
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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