Weather Almanac: San Marcos, TX 78666

🗓️ Historical norms for January 2026

December February

Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.

January avg. precipitation

🌧️ 2.06"

January days below freezing

📉 ≈7.0 days

Average January lows 35°F – 42°F

USDA Zone

Annual extreme lows 20°F to 25°F

Last Spring Frost (36°F)

🌷 Mar 23

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First Fall Frost (36°F)

🍂 Nov 10

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F: Forecast

H: Normal High Temp

L: Normal Low Temp

Sunday

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Thu. January 1 New Year's Day

🌅 7:27 a.m.

H: 50°F – 73°F

L: 29°F – 48°F

🌇 5:43 p.m.

Fri. January 2

🌅 7:27 a.m.

H: 50°F – 73°F

L: 29°F – 48°F

🌇 5:44 p.m.

Sat. January 3

🌅 7:28 a.m.

H: 50°F – 73°F

L: 29°F – 48°F

🌇 5:45 p.m.

Sun. January 4

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:45 p.m.

Mon. January 5

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:46 p.m.

Tue. January 6 Epiphany

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:47 p.m.

Wed. January 7

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:48 p.m.

Thu. January 8

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:49 p.m.

Fri. January 9

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:49 p.m.

Sat. January 10

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:50 p.m.

Sun. January 11

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:51 p.m.

Mon. January 12

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:52 p.m.

Tue. January 13

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:53 p.m.

Wed. January 14

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:53 p.m.

Thu. January 15

🌅 7:28 a.m.

H: 51°F – 73°F

L: 29°F – 48°F

🌇 5:54 p.m.

Fri. January 16

🌅 7:28 a.m.

H: 52°F – 73°F

L: 29°F – 48°F

🌇 5:55 p.m.

Sat. January 17

🌅 7:27 a.m.

H: 52°F – 73°F

L: 30°F – 48°F

🌇 5:56 p.m.

Sun. January 18

🌅 7:27 a.m.

H: 52°F – 73°F

L: 30°F – 48°F

🌇 5:57 p.m.

Mon. January 19 Confederate Memorial Day; Martin Luther King Jr. Day

🌅 7:27 a.m.

H: 52°F – 73°F

L: 30°F – 48°F

🌇 5:58 p.m.

Tue. January 20

🌅 7:27 a.m.

H: 52°F – 73°F

L: 30°F – 48°F

🌇 5:59 p.m.

Wed. January 21

🌅 7:26 a.m.

H: 52°F – 74°F

L: 30°F – 48°F

🌇 5:59 p.m.

Thu. January 22

🌅 7:26 a.m.

H: 52°F – 74°F

L: 30°F – 48°F

🌇 6:00 p.m.

Fri. January 23

🌅 7:26 a.m.

H: 52°F – 74°F

L: 30°F – 48°F

🌇 6:01 p.m.

Sat. January 24

🌅 7:25 a.m.

H: 52°F – 74°F

L: 30°F – 48°F

🌇 6:02 p.m.

Sun. January 25

🌅 7:25 a.m.

H: 52°F – 74°F

L: 30°F – 48°F

🌇 6:03 p.m.

Mon. January 26

🌅 7:24 a.m.

H: 52°F – 74°F

L: 30°F – 48°F

🌇 6:04 p.m.

Tue. January 27

🌅 7:24 a.m.

H: 52°F – 74°F

L: 30°F – 48°F

🌇 6:05 p.m.

Wed. January 28

🌅 7:24 a.m.

H: 53°F – 74°F

L: 30°F – 49°F

🌇 6:06 p.m.

Thu. January 29

🌅 7:23 a.m.

H: 53°F – 74°F

L: 30°F – 49°F

🌇 6:06 p.m.

Fri. January 30

🌅 7:22 a.m.

H: 53°F – 75°F

L: 31°F – 49°F

🌇 6:07 p.m.

Sat. January 31

🌅 7:22 a.m.

H: 53°F – 75°F

L: 31°F – 49°F

🌇 6:08 p.m.

December February

Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.

Temperature climatic data from weather station: SAN MARCOS (USC00417983)

Precipitation climatic data from weather station: SAN MARCOS (USC00417983)

Agricultural climatic data from weather station: AUSTIN SAN ANTONIO (USW00012971)