Point Forecast: Oak Brook IL  41.82N 87.94W	Last Update: 9:36 am CDT Sep 4, 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: 9am Fri, Sep 4 202610am Fri, Sep 4 202611am Fri, Sep 4 202612pm Fri, Sep 4 20261pm Fri, Sep 4 20262pm Fri, Sep 4 20263pm Fri, Sep 4 20264pm Fri, Sep 4 20265pm Fri, Sep 4 20266pm Fri, Sep 4 20267pm Fri, Sep 4 20268pm Fri, Sep 4 20269pm Fri, Sep 4 202610pm Fri, Sep 4 202611pm Fri, Sep 4 202612am Sat, Sep 5 20261am Sat, Sep 5 20262am Sat, Sep 5 20263am Sat, Sep 5 20264am Sat, Sep 5 20265am Sat, Sep 5 20266am Sat, Sep 5 20267am Sat, Sep 5 20268am Sat, Sep 5 20269am Sat, Sep 5 202610am Sat, Sep 5 202611am Sat, Sep 5 202612pm Sat, Sep 5 20261pm Sat, Sep 5 20262pm Sat, Sep 5 20263pm Sat, Sep 5 20264pm Sat, Sep 5 20265pm Sat, Sep 5 20266pm Sat, Sep 5 20267pm Sat, Sep 5 20268pm Sat, Sep 5 20269pm Sat, Sep 5 202610pm Sat, Sep 5 202611pm Sat, Sep 5 202612am Sun, Sep 6 20261am Sun, Sep 6 20262am Sun, Sep 6 20263am Sun, Sep 6 20264am Sun, Sep 6 20265am Sun, Sep 6 20266am Sun, Sep 6 20267am Sun, Sep 6 20268am Sun, Sep 6 20269am Sun, Sep 6 202610am Sun, Sep 6 202611am Sun, Sep 6 202612pm Sun, Sep 6 20261pm Sun, Sep 6 20262pm Sun, Sep 6 20263pm Sun, Sep 6 20264pm Sun, Sep 6 20265pm Sun, Sep 6 20266pm Sun, Sep 6 20267pm Sun, Sep 6 20268pm Sun, Sep 6 20269pm Sun, Sep 6 202610pm Sun, Sep 6 202611pm Sun, Sep 6 202612am Mon, Sep 7 20261am Mon, Sep 7 20262am Mon, Sep 7 20263am Mon, Sep 7 20264am Mon, Sep 7 20265am Mon, Sep 7 20266am Mon, Sep 7 20267am Mon, Sep 7 20268am Mon, Sep 7 20269am Mon, Sep 7 202610am Mon, Sep 7 202611am Mon, Sep 7 202612pm Mon, Sep 7 20261pm Mon, Sep 7 20262pm Mon, Sep 7 20263pm Mon, Sep 7 20264pm Mon, Sep 7 20265pm Mon, Sep 7 20266pm Mon, Sep 7 20267pm Mon, Sep 7 20268pm Mon, Sep 7 20269pm Mon, Sep 7 202610pm Mon, Sep 7 202611pm Mon, Sep 7 202612am Tue, Sep 8 20261am Tue, Sep 8 20262am Tue, Sep 8 20263am Tue, Sep 8 20264am Tue, Sep 8 20265am Tue, Sep 8 20266am Tue, Sep 8 20267am Tue, Sep 8 20268am Tue, Sep 8 20269am Tue, Sep 8 202610am Tue, Sep 8 202611am Tue, Sep 8 202612pm Tue, Sep 8 20261pm Tue, Sep 8 20262pm Tue, Sep 8 20263pm Tue, Sep 8 20264pm Tue, Sep 8 20265pm Tue, Sep 8 20266pm Tue, Sep 8 20267pm Tue, Sep 8 20268pm Tue, Sep 8 2026

Date	09/04															09/05
Hour (CDT)	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08
Temperature (°F)	84	84	85	86	88	91	93	93	92	90	88	86	85	85	82	81	79	78	78	77	76	75	75	76
Dewpoint (°F)	72	72	73	73	73	72	73	73	73	73	74	73	73	73	73	72	72	72	71	71	71	71	72	73
Heat Index (°F)	90	90	92	93	96	99	101	102	101	99	96	94	93	91	88	86	83	79	78	77	76	75	75	77
Surface Wind (mph)	8	9	11	10	10	9	9	9	9	9	7	6	5	6	5	5	6	6	6	6	6	5	5	6
Wind Dir	ENE	ENE	NNE	NW	SW	SSW	SSW	SW	WSW	WSW	W	WSW	WNW	W	WSW	W	W	W	W	W	WNW	WNW	NW	NNW
Gust		14	18	15		14	14	14	14	14
Sky Cover (%)	36	32	33	27	23	25	32	31	22	23	14	17	38	42	54	59	49	29	31	31	27	32	38	35
Precipitation Potential (%)	12	19	16	7	2	1	1	1	2	2	4	6	7	14	21	24	28	28	28	21	21	21	4	4
Relative Humidity (%)	68	68	67	64	60	55	52	53	55	59	63	66	67	68	73	75	79	80	80	82	86	87	90	88
Rain	--	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	Chc	Chc	Chc	SChc	SChc	SChc	--	--
Thunder	--	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	Chc	Chc	Chc	SChc	SChc	SChc	--	--
Date																09/06
Hour (CDT)	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08
Temperature (°F)	79	81	83	85	86	86	86	84	83	80	77	76	74	73	73	72	72	72	71	70	69	68	69	70
Dewpoint (°F)	74	74	74	74	73	73	73	72	71	71	70	70	70	70	70	69	69	68	68	67	67	67	67	66
Heat Index (°F)	79	87	91	93	93	94	92	90	87	84	77	76
Surface Wind (mph)	5	6	6	7	8	9	9	10	10	10	10	10	9	8	8	7	6	6	5	5	5	5	5	5
Wind Dir	NNE	NNE	NNE	NNE	NNE	NNE	NNE	NNE	NNE	NNE	NNE	NNE	NE	NE	NE	NE	NE	NE	ENE	ENE	ENE	ENE	ENE	ENE
Gust							14	15	15	16	16	15	14	13
Sky Cover (%)	45	41	45	34	35	51	39	35	31	48	48	65	48	31	33	34	36	36	36	36	34	32	30	29
Precipitation Potential (%)	4	2	2	2	1	1	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1
Relative Humidity (%)	85	80	74	70	65	65	65	66	69	73	78	82	85	88	90	90	90	90	90	91	94	96	94	87
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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