Point Forecast: Lake Forest IL  42.24N 87.86W	Last Update: 1:21 am CDT Sep 10, 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 Thu, Sep 10 20263am Thu, Sep 10 20264am Thu, Sep 10 20265am Thu, Sep 10 20266am Thu, Sep 10 20267am Thu, Sep 10 20268am Thu, Sep 10 20269am Thu, Sep 10 202610am Thu, Sep 10 202611am Thu, Sep 10 202612pm Thu, Sep 10 20261pm Thu, Sep 10 20262pm Thu, Sep 10 20263pm Thu, Sep 10 20264pm Thu, Sep 10 20265pm Thu, Sep 10 20266pm Thu, Sep 10 20267pm Thu, Sep 10 20268pm Thu, Sep 10 20269pm Thu, Sep 10 202610pm Thu, Sep 10 202611pm Thu, Sep 10 202612am Fri, Sep 11 20261am Fri, Sep 11 20262am Fri, Sep 11 20263am Fri, Sep 11 20264am Fri, Sep 11 20265am Fri, Sep 11 20266am Fri, Sep 11 20267am Fri, Sep 11 20268am Fri, Sep 11 20269am Fri, Sep 11 202610am Fri, Sep 11 202611am Fri, Sep 11 202612pm Fri, Sep 11 20261pm Fri, Sep 11 20262pm Fri, Sep 11 20263pm Fri, Sep 11 20264pm Fri, Sep 11 20265pm Fri, Sep 11 20266pm Fri, Sep 11 20267pm Fri, Sep 11 20268pm Fri, Sep 11 20269pm Fri, Sep 11 202610pm Fri, Sep 11 202611pm Fri, Sep 11 202612am Sat, Sep 12 20261am Sat, Sep 12 20262am Sat, Sep 12 20263am Sat, Sep 12 20264am Sat, Sep 12 20265am Sat, Sep 12 20266am Sat, Sep 12 20267am Sat, Sep 12 20268am Sat, Sep 12 20269am Sat, Sep 12 202610am Sat, Sep 12 202611am Sat, Sep 12 202612pm Sat, Sep 12 20261pm Sat, Sep 12 20262pm Sat, Sep 12 20263pm Sat, Sep 12 20264pm Sat, Sep 12 20265pm Sat, Sep 12 20266pm Sat, Sep 12 20267pm Sat, Sep 12 20268pm Sat, Sep 12 20269pm Sat, Sep 12 202610pm Sat, Sep 12 202611pm Sat, Sep 12 202612am Sun, Sep 13 20261am Sun, Sep 13 20262am Sun, Sep 13 20263am Sun, Sep 13 20264am Sun, Sep 13 20265am Sun, Sep 13 20266am Sun, Sep 13 20267am Sun, Sep 13 20268am Sun, Sep 13 20269am Sun, Sep 13 202610am Sun, Sep 13 202611am Sun, Sep 13 202612pm Sun, Sep 13 20261pm Sun, Sep 13 20262pm Sun, Sep 13 20263pm Sun, Sep 13 20264pm Sun, Sep 13 20265pm Sun, Sep 13 20266pm Sun, Sep 13 20267pm Sun, Sep 13 20268pm Sun, Sep 13 20269pm Sun, Sep 13 202610pm Sun, Sep 13 202611pm Sun, Sep 13 202612am Mon, Sep 14 20261am Mon, Sep 14 20262am Mon, Sep 14 20263am Mon, Sep 14 20264am Mon, Sep 14 20265am Mon, Sep 14 20266am Mon, Sep 14 20267am Mon, Sep 14 20268am Mon, Sep 14 20269am Mon, Sep 14 202610am Mon, Sep 14 202611am Mon, Sep 14 202612pm Mon, Sep 14 20261pm Mon, Sep 14 2026

Date	09/10																						09/11
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)	69	68	67	66	65	65	67	70	73	75	77	77	77	77	75	74	73	71	69	68	66	66	65	64
Dewpoint (°F)	67	65	64	63	62	60	60	59	58	57	57	57	57	58	59	60	60	60	60	60	60	60	59	59
Heat Index (°F)										75	77	77	77	77	75
Surface Wind (mph)	6	6	5	5	5	5	5	6	5	5	5	5	5	6	6	6	5	5	3	2	1	0	0	0
Wind Dir	NNW	NNW	NNW	NNW	N	N	N	N	N	NNE	NNE	NE	ENE	ENE	ENE	E	ENE	E	E	E	ESE	ESE	SE	SSE
Gust
Sky Cover (%)	54	56	59	59	58	56	50	65	70	73	75	74	66	43	21	16	11	4	1	2	2	3	3	4
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 (%)	92	91	90	90	88	85	78	67	60	54	51	50	51	52	56	60	64	68	75	78	80	80	81	83
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																							09/12
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)	64	63	62	61	60	61	66	70	73	75	76	76	76	76	76	75	73	72	69	68	66	66	65	65
Dewpoint (°F)	59	58	58	58	57	58	61	59	58	57	57	57	57	57	57	57	58	58	59	60	60	61	61	61
Heat Index (°F)										75	76	76	76	76	76	75
Surface Wind (mph)	0	0	0	0	0	0	1	3	5	7	8	9	9	9	9	9	8	7	6	6	6	6	6	6
Wind Dir	SSE	SSW	SW	SW	SW	SW	SSW	S	SSE	SSE	SE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	SE	SSE	SSE	S	S	S
Gust
Sky Cover (%)	6	5	3	3	8	6	8	4	2	2	1	2	2	1	1	1	2	3	8	13	18	28	38	48
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	3
Relative Humidity (%)	85	85	88	89	90	89	84	68	58	53	52	51	51	51	52	54	59	64	70	76	81	84	86	87
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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