Point Forecast: Ottawa IL  41.35N 88.85W	Last Update: 9:46 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: 10am 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 20269pm Tue, Sep 8 2026

Date	09/04														09/05
Hour (CDT)	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09
Temperature (°F)	85	86	88	91	92	94	94	93	90	88	85	83	81	80	79	78	77	76	75	75	74	74	76	79
Dewpoint (°F)	74	75	76	76	76	75	75	75	75	75	74	74	74	73	72	72	72	72	71	71	71	71	72	74
Heat Index (°F)	93	96	99	102	105	106	105	104	101	97	93	90	86	85	79	78	77	76	75	75			76	83
Surface Wind (mph)	6	8	9	10	10	10	10	9	7	5	5	3	3	3	3	3	3	3	3	3	3	3	3	3
Wind Dir	SSW	SW	W	W	W	W	W	WSW	WSW	WSW	WSW	SW	SW	SSW	W	W	WSW	WSW	WSW	W	WNW	W	NW	NNE
Gust			14	15	15	15	15	14
Sky Cover (%)	17	36	34	41	35	34	20	21	25	33	25	22	32	32	48	56	43	31	11	13	8	23	9	21
Precipitation Potential (%)	2	5	5	3	2	1	1	2	2	2	3	5	6	8	12	17	17	17	18	18	18	8	8	8
Relative Humidity (%)	72	70	66	62	58	56	55	57	60	66	70	74	78	79	80	83	84	85	87	89	90	91	88	83
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	--	--	--
Date															09/06
Hour (CDT)	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09
Temperature (°F)	82	85	88	89	90	90	90	89	87	83	80	77	75	73	71	70	70	70	69	68	68	68	70	73
Dewpoint (°F)	75	75	75	75	74	74	74	73	73	72	72	71	71	70	70	69	69	69	68	68	67	67	67	67
Heat Index (°F)	89	94	98	100	101	100	99	97	94	88	84	77	75
Surface Wind (mph)	5	5	5	6	7	7	7	8	8	8	8	8	8	7	6	5	5	5	5	5	5	5	5	6
Wind Dir	NE	NNE	N	N	N	N	NNE	NNE	NNE	NE	NE	NE	ENE	ENE	NE	NE	NE	NE	NE	NE	ENE	ENE	ENE	E
Gust			10	11	13	13	14	14	15	15	15	16	15	14	13	10	10	10	10				10
Sky Cover (%)	27	18	17	13	9	18	32	14	13	16	37	29	20	24	28	32	32	33	33	35	37	39	37	35
Precipitation Potential (%)	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	3	3	3
Relative Humidity (%)	78	73	67	64	60	59	58	59	63	71	76	81	87	91	94	95	96	96	97	98	98	96	90	82
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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