San Marcos weather in March: San Marcos, Texas: normal highs, lows, rain and records for March
San Marcos in March has a normal high of 73°F and a normal low of 50°F, a daily mean of 61°F, rising from 70°F on the 1st to 77°F by the 31st. Measurable precipitation falls on 8 days in a normal March, 2.76 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 10°C, 70 mm of precipitation in March.
- NOAA stationSan Marcos
- Station IDUSC00417983
- Location29.88°N 97.95°W
- Elevation665 ft (203 m)
- Population74,316
- Jan 62° 39°
- Feb 67° 42°
- Mar 73° 50°
- Apr 80° 56°
- May 86° 65°
- Jun 92° 72°
- Jul 96° 73°
- Aug 97° 74°
- Sep 91° 69°
- Oct 82° 58°
- Nov 72° 48°
- Dec 64° 41°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is San Marcos in March?
The normal high is 73°F and the normal low 50°F, for a daily mean of 61.3°F. March is 6.8°F warmer than February and 6.7°F cooler than April. March is the 8th warmest month of the year in San Marcos and the 6th wettest. Across the month the normal high rises 7°F, from 70°F on March 1 to 77°F on March 31. From one year to the next March's mean temperature typically moves about 3.3°F either way (NOAA's standard deviation), so roughly two Marchs in three average between 58°F and 65°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 26%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| March 1 | 70°F | 46°F | 26% | 14% |
| March 8 | 71°F | 48°F | 26% | 14% |
| March 15 | 73°F | 49°F | 26% | 15% |
| March 22 | 75°F | 51°F | 26% | 14% |
| March 31 | 77°F | 53°F | 25% | 14% |
Every day of March: normal high, low and chance of precipitation (warmest afternoon March 31, coldest night March 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| March 1 | 70°F | 46°F | 26% | 14% | 11 h 30 min |
| March 2 | 70°F | 46°F | 26% | 14% | 11 h 30 min |
| March 3 | 70°F | 46°F | 26% | 14% | 11 h 30 min |
| March 4 | 70°F | 46°F | 26% | 14% | 11 h 40 min |
| March 5 | 70°F | 47°F | 26% | 14% | 11 h 40 min |
| March 6 | 71°F | 47°F | 26% | 14% | 11 h 40 min |
| March 7 | 71°F | 47°F | 26% | 14% | 11 h 40 min |
| March 8 | 71°F | 48°F | 26% | 14% | 11 h 40 min |
| March 9 | 71°F | 48°F | 26% | 14% | 11 h 50 min |
| March 10 | 72°F | 48°F | 26% | 14% | 11 h 50 min |
| March 11 | 72°F | 48°F | 26% | 14% | 11 h 50 min |
| March 12 | 72°F | 49°F | 26% | 15% | 11 h 50 min |
| March 13 | 72°F | 49°F | 26% | 15% | 11 h 50 min |
| March 14 | 73°F | 49°F | 26% | 15% | 11 h 50 min |
| March 15 | 73°F | 49°F | 26% | 15% | 12 h |
| March 16 | 73°F | 50°F | 26% | 15% | 12 h |
| March 17 | 73°F | 50°F | 26% | 15% | 12 h |
| March 18 | 74°F | 50°F | 26% | 15% | 12 h |
| March 19 | 74°F | 50°F | 26% | 14% | 12 h |
| March 20 | 74°F | 51°F | 26% | 14% | 12 h 10 min |
| March 21 | 74°F | 51°F | 26% | 14% | 12 h 10 min |
| March 22 | 75°F | 51°F | 26% | 14% | 12 h 10 min |
| March 23 | 75°F | 51°F | 26% | 14% | 12 h 10 min |
| March 24 | 75°F | 52°F | 26% | 14% | 12 h 10 min |
| March 25 | 75°F | 52°F | 25% | 14% | 12 h 10 min |
| March 26 | 76°F | 52°F | 25% | 14% | 12 h 20 min |
| March 27 | 76°F | 52°F | 25% | 14% | 12 h 20 min |
| March 28 | 76°F | 52°F | 25% | 14% | 12 h 20 min |
| March 29 | 76°F | 53°F | 25% | 14% | 12 h 20 min |
| March 30 | 77°F | 53°F | 25% | 14% | 12 h 20 min |
| March 31 | 77°F | 53°F | 25% | 14% | 12 h 30 min |
- Normal high
- 73°FMarch average
- Normal low
- 50°FMarch average
- Precipitation
- 2.76 inmonth total
- Days with precipitation
- 80.01 inch or more
- Nights at 32°F or colder
- 1
- Daylight
- 11 h 30 min to 12 h 30 minMarch 1 to March 31
- Days at 70°F or more
- 22
- Days at 80°F or more
- 9
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00417983; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in San Marcos in March?
On a given March day the chance of 0.01 inch or more is 26% on average, highest around March 14 (26%). In all, 2.76 in falls on 8 days of a normal March, 1 of them with an inch or more.
In a normal March in San Marcos, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00417983.
What are the records for March in San Marcos?
The warmest March temperature on this station's record (since 1895) is 99°F, on March 29, 1971; the coldest is 17°F, on March 2, 1980. The wettest March brought 9.40 in (1921); the snowiest, 5.0 inches (1965).
The March mean against the 1991-2020 normal of 61.3°F: 2022 58.4°F (−2.9), 2023 64.1°F (+2.8), 2024 64.1°F (+2.8), 2025 66.8°F (+5.5), 2026 70.4°F (+9.1). 4 of 5 ran warmer than normal.
| March | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 58.4°F | −2.9°F | 0.81 in |
| 2023 | 64.1°F | +2.8°F | 1.70 in |
| 2024 | 64.1°F | +2.8°F | 1.68 in |
| 2025 | 66.8°F | +5.5°F | 2.39 in |
| 2026 | 70.4°F | +9.1°F | 0.54 in |
Source: records: ACIS, station USC00417983; recent months: ACIS, station USC00417983. Records and recent months use complete months only.
How does March in San Marcos compare across Texas?
Across the 321 places PlainClimate covers in Texas, March normal highs run from 62°F in Gruver to 83°F in McAllen; San Marcos's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.