San Marcos weather in July: San Marcos, Texas: normal highs, lows, rain and records for July
San Marcos in July has a normal high of 96°F and a normal low of 73°F, a daily mean of 85°F, rising from 94°F on the 1st to 97°F by the 31st. Measurable precipitation falls on 5 days in a normal July, 2.21 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 35°C and low of 23°C, 56 mm of precipitation in July.
- 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 July?
The normal high is 96°F and the normal low 73°F, for a daily mean of 84.5°F. July is 2.4°F warmer than June and 0.7°F cooler than August. July is the 2nd warmest month of the year in San Marcos and the 11th wettest. Across the month the normal high rises 3°F, from 94°F on July 1 to 97°F on July 31. From one year to the next July's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Julys in three average between 82°F and 87°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 20%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 94°F | 73°F | 20% | 15% |
| July 8 | 95°F | 73°F | 19% | 13% |
| July 15 | 96°F | 73°F | 17% | 11% |
| July 22 | 97°F | 74°F | 15% | 9% |
| July 31 | 97°F | 74°F | 14% | 8% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 30, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 94°F | 73°F | 20% | 15% | 14 h |
| July 2 | 94°F | 73°F | 20% | 14% | 14 h |
| July 3 | 94°F | 73°F | 20% | 14% | 14 h |
| July 4 | 94°F | 73°F | 20% | 14% | 14 h |
| July 5 | 94°F | 73°F | 20% | 14% | 14 h |
| July 6 | 95°F | 73°F | 20% | 14% | 14 h |
| July 7 | 95°F | 73°F | 19% | 13% | 14 h |
| July 8 | 95°F | 73°F | 19% | 13% | 14 h |
| July 9 | 95°F | 73°F | 19% | 13% | 14 h |
| July 10 | 95°F | 73°F | 18% | 13% | 14 h |
| July 11 | 95°F | 73°F | 18% | 12% | 14 h |
| July 12 | 95°F | 73°F | 18% | 12% | 14 h |
| July 13 | 95°F | 73°F | 18% | 12% | 14 h |
| July 14 | 95°F | 73°F | 17% | 11% | 13 h 50 min |
| July 15 | 96°F | 73°F | 17% | 11% | 13 h 50 min |
| July 16 | 96°F | 73°F | 17% | 11% | 13 h 50 min |
| July 17 | 96°F | 73°F | 16% | 11% | 13 h 50 min |
| July 18 | 96°F | 74°F | 16% | 10% | 13 h 50 min |
| July 19 | 96°F | 74°F | 16% | 10% | 13 h 50 min |
| July 20 | 96°F | 74°F | 16% | 10% | 13 h 50 min |
| July 21 | 96°F | 74°F | 15% | 10% | 13 h 50 min |
| July 22 | 97°F | 74°F | 15% | 9% | 13 h 50 min |
| July 23 | 97°F | 74°F | 15% | 9% | 13 h 50 min |
| July 24 | 97°F | 74°F | 15% | 9% | 13 h 50 min |
| July 25 | 97°F | 74°F | 15% | 9% | 13 h 40 min |
| July 26 | 97°F | 74°F | 15% | 9% | 13 h 40 min |
| July 27 | 97°F | 74°F | 14% | 8% | 13 h 40 min |
| July 28 | 97°F | 74°F | 14% | 8% | 13 h 40 min |
| July 29 | 97°F | 74°F | 14% | 8% | 13 h 40 min |
| July 30 | 97°F | 74°F | 14% | 8% | 13 h 40 min |
| July 31 | 97°F | 74°F | 14% | 8% | 13 h 40 min |
- Normal high
- 96°FJuly average
- Normal low
- 73°FJuly average
- Precipitation
- 2.21 inmonth total
- Days with precipitation
- 50.01 inch or more
- Days at 90°F or more
- 29
- Daylight
- 14 h to 13 h 40 minJuly 1 to July 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 31
- Sunshine
- 86%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 July?
On a given July day the chance of 0.01 inch or more is 17% on average, highest around July 1 (20%). In all, 2.21 in falls on 5 days of a normal July, 1 of them with an inch or more.
In a normal July in San Marcos, 29 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00417983.
What are the records for July in San Marcos?
The warmest July temperature on this station's record (since 1895) is 110°F, on July 27, 1954; the coldest is 56°F, on July 16, 1967. The wettest July brought 14.83 in (1902).
The July mean against the 1991-2020 normal of 84.5°F: 2021 81.8°F (−2.7), 2022 89.2°F (+4.7), 2023 89.1°F (+4.6), 2024 84.1°F (−0.4), 2025 83.8°F (−0.7), 2026 85.4°F (+0.9). 3 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 81.8°F | −2.7°F | 4.53 in |
| 2022 | 89.2°F | +4.7°F | 0.02 in |
| 2023 | 89.1°F | +4.6°F | 1.31 in |
| 2024 | 84.1°F | −0.4°F | 5.96 in |
| 2025 | 83.8°F | −0.7°F | 2.88 in |
| 2026 | 85.4°F | +0.9°F | 3.95 in |
Source: records: ACIS, station USC00417983; recent months: ACIS, station USC00417983. Records and recent months use complete months only.
How does July in San Marcos compare across Texas?
Across the 321 places PlainClimate covers in Texas, July normal highs run from 88°F in Matagorda to 101°F in Presidio; San Marcos's is 96°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.