Point Forecast: San Marcos TX  29.88N 97.94W (Elev. 577 ft)	Last Update: 9:42 am CDT May 9, 2026

[hide menu]

Weather Elements Weather/Precipitation Fire Weather 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

48-Hour Period Starting: 9am Sat, May 9 202610am Sat, May 9 202611am Sat, May 9 202612pm Sat, May 9 20261pm Sat, May 9 20262pm Sat, May 9 20263pm Sat, May 9 20264pm Sat, May 9 20265pm Sat, May 9 20266pm Sat, May 9 20267pm Sat, May 9 20268pm Sat, May 9 20269pm Sat, May 9 202610pm Sat, May 9 202611pm Sat, May 9 202612am Sun, May 10 20261am Sun, May 10 20262am Sun, May 10 20263am Sun, May 10 20264am Sun, May 10 20265am Sun, May 10 20266am Sun, May 10 20267am Sun, May 10 20268am Sun, May 10 20269am Sun, May 10 202610am Sun, May 10 202611am Sun, May 10 202612pm Sun, May 10 20261pm Sun, May 10 20262pm Sun, May 10 20263pm Sun, May 10 20264pm Sun, May 10 20265pm Sun, May 10 20266pm Sun, May 10 20267pm Sun, May 10 20268pm Sun, May 10 20269pm Sun, May 10 202610pm Sun, May 10 202611pm Sun, May 10 202612am Mon, May 11 20261am Mon, May 11 20262am Mon, May 11 20263am Mon, May 11 20264am Mon, May 11 20265am Mon, May 11 20266am Mon, May 11 20267am Mon, May 11 20268am Mon, May 11 20269am Mon, May 11 202610am Mon, May 11 202611am Mon, May 11 202612pm Mon, May 11 20261pm Mon, May 11 20262pm Mon, May 11 20263pm Mon, May 11 20264pm Mon, May 11 20265pm Mon, May 11 20266pm Mon, May 11 20267pm Mon, May 11 20268pm Mon, May 11 20269pm Mon, May 11 202610pm Mon, May 11 202611pm Mon, May 11 202612am Tue, May 12 20261am Tue, May 12 20262am Tue, May 12 20263am Tue, May 12 20264am Tue, May 12 20265am Tue, May 12 20266am Tue, May 12 20267am Tue, May 12 20268am Tue, May 12 20269am Tue, May 12 202610am Tue, May 12 202611am Tue, May 12 202612pm Tue, May 12 20261pm Tue, May 12 20262pm Tue, May 12 20263pm Tue, May 12 20264pm Tue, May 12 20265pm Tue, May 12 20266pm Tue, May 12 20267pm Tue, May 12 20268pm Tue, May 12 20269pm Tue, May 12 202610pm Tue, May 12 202611pm Tue, May 12 202612am Wed, May 13 20261am Wed, May 13 20262am Wed, May 13 20263am Wed, May 13 20264am Wed, May 13 20265am Wed, May 13 20266am Wed, May 13 20267am Wed, May 13 20268am Wed, May 13 20269am Wed, May 13 202610am Wed, May 13 202611am Wed, May 13 202612pm Wed, May 13 20261pm Wed, May 13 20262pm Wed, May 13 20263pm Wed, May 13 20264pm Wed, May 13 20265pm Wed, May 13 20266pm Wed, May 13 20267pm Wed, May 13 20268pm Wed, May 13 2026

Date	05/09															05/10
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)	73	76	79	82	84	86	87	88	88	88	86	84	78	76	75	73	73	72	71	71	70	70	70	72
Dewpoint (°F)	72	72	72	72	71	70	69	68	68	68	68	69	68	68	68	68	68	68	68	67	68	68	68	68
Heat Index (°F)		76	82	87	89	91	91	91	91	91	90	88	78	76	75
Surface Wind (mph)	1	1	1	2	2	3	3	3	5	5	6	5	5	5	3	3	2	2	3	3	3	3	5	6
Wind Dir	NNE	E	ESE	E	E	SE	SE	SSE	SE	SE	SSE	SE	SE	SE	ESE	SE	SSE	S	SSW	SSW	SSW	SSW	SSW	S
Gust
Sky Cover (%)	76	69	60	51	42	40	39	37	29	22	14	15	17	14	6	2	1	17	20	37	43	52	52	67
Precipitation Potential (%)	11	6	6	6	5	5	5	1	1	1	2	2	2	2	2	2	0	0	0	0	0	0	0	0
Relative Humidity (%)	95	87	79	71	65	59	55	52	51	51	54	61	71	76	79	84	84	87	90	87	93	93	93	87
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																05/11
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)	73	77	79	82	85	88	89	90	89	88	88	82	78	75	73	72	71	70	69	69	68	68	68	69
Dewpoint (°F)	69	70	70	71	70	70	69	68	68	68	68	68	68	68	68	67	67	66	66	65	64	64	64	64
Heat Index (°F)		77	79	86	90	93	94	94	93	92	92	85	78	75
Surface Wind (mph)	6	6	6	6	6	6	6	7	7	7	7	7	7	7	7	6	6	7	8	9	10	10	11	13
Wind Dir	S	S	S	S	S	SSE	SSE	SSE	SSE	SE	SE	SE	E	NE	NE	NNE	NNE	NNE	NNE	N	N	N	N	N
Gust																							18	20
Sky Cover (%)	69	61	53	54	49	35	26	7	2	2	16	19	32	44	53	61	70	71	73	74	72	70	68	67
Precipitation Potential (%)	0	0	0	0	0	0	0	4	4	4	79	79	79	79	79	79	44	44	44	44	44	44	4	4
Relative Humidity (%)	87	79	74	69	61	55	52	49	50	52	52	63	71	79	84	84	87	87	90	87	87	87	87	84
Rain	--	--	--	--	--	--	--	--	--	--	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Chc	Chc	Chc	Chc	Chc	Chc	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Chc	Chc	Chc	SChc	SChc	SChc	SChc	SChc	SChc	--	--

International System of Units Forecast Discussion 7-Day Forecast Hourly Weather Graph NWS Austin/San Antonio Current Observations Satellite Imagery Interactive Grids Point Forecast Matrices Fire Weather Drought Rivers & Lakes Climate Data NOAA Weather Radio Contact Local Office