Santa Rosa, Texas climate: Normal weather by month, frost dates and records
Santa Rosa's normal year runs from 49°F January nights to 97°F August afternoons, with 24.6 inches of precipitation and less than an inch of snow (0.1 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 23.7°C, January lows of 9°C, August highs of 36°C, 625 mm of precipitation a year.
- NOAA stationSanta Rosa (3 mi WNW)
- Station IDUSC00418059
- Location26.27°N 97.87°W
- Elevation50 ft (15 m)
- From the center3 miles
- Population2,366
On October 23, the normal high in Santa Rosa is 87°F and the normal low 63°F, and the chance of measurable rain or snow is 20%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Santa Rosa.
- Jan 71° 49°
- Feb 76° 53°
- Mar 81° 58°
- Apr 86° 64°
- May 91° 71°
- Jun 95° 75°
- Jul 96° 76°
- Aug 97° 75°
- Sep 93° 72°
- Oct 88° 65°
- Nov 80° 57°
- Dec 73° 50°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Santa Rosa each month?
August is the warmest month, with normal highs of 97°F; January the coldest, with normal lows of 49°F. The most precipitation falls in September (5.56 in), the least in February (1.00 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 71°F | 49°F | 60.1°F | 1.12 | 7 | <1 | 1 | 10 h 40 min |
| February | 76°F | 53°F | 64.4°F | 1.00 | 6 | 1 | 1 | 11 h 20 min |
| March | 81°F | 58°F | 69.7°F | 1.40 | 6 | 4 | <1 | 12 h |
| April | 86°F | 64°F | 75.3°F | 1.39 | 5 | 11 | <1 | 12 h 50 min |
| May | 91°F | 71°F | 80.7°F | 2.48 | 5 | 20 | <1 | 13 h 20 min |
| June | 95°F | 75°F | 84.8°F | 2.88 | 5 | 28 | <1 | 13 h 50 min |
| July | 96°F | 76°F | 86.0°F | 1.67 | 4 | 30 | <1 | 13 h 40 min |
| August | 97°F | 75°F | 86.4°F | 2.10 | 5 | 30 | <1 | 13 h 10 min |
| September | 93°F | 72°F | 82.3°F | 5.56 | 9 | 23 | <1 | 12 h 20 min |
| October | 88°F | 65°F | 76.6°F | 2.66 | 6 | 17 | <1 | 11 h 30 min |
| November | 80°F | 57°F | 68.4°F | 1.23 | 6 | 3 | <1 | 10 h 50 min |
| December | 73°F | 50°F | 61.6°F | 1.12 | 7 | <1 | 1 | 10 h 30 min |
| Year (annual) | 86°F | 64°F | 74.7°F | 24.61 | 70 | 166 | 2 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 22°C | 9°C | 15.6°C | 28 mm |
| February | 24°C | 12°C | 18.0°C | 25 mm |
| March | 27°C | 15°C | 20.9°C | 36 mm |
| April | 30°C | 18°C | 24.1°C | 35 mm |
| May | 33°C | 22°C | 27.1°C | 63 mm |
| June | 35°C | 24°C | 29.3°C | 73 mm |
| July | 36°C | 24°C | 30.0°C | 42 mm |
| August | 36°C | 24°C | 30.2°C | 53 mm |
| September | 34°C | 22°C | 27.9°C | 141 mm |
| October | 31°C | 18°C | 24.8°C | 68 mm |
| November | 27°C | 14°C | 20.2°C | 31 mm |
| December | 23°C | 10°C | 16.4°C | 28 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00418059; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Santa Rosa?
Normal highs sit between 65°F and 85°F in January, February, March, November and December. Of those, February has the fewest days with rain (6).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00418059.
When is the last frost in Santa Rosa?
In Santa Rosa, the last spring frost (32°F) comes after January 10 in half of years and after February 24 in one year in ten; the first autumn frost comes before December 27 in half of years and before December 3 in one year in ten. A night at 32°F or colder comes at all in 63% of years here (NOAA).
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- January 101 year in 10 after February 24; 9 in 10 after December 13
- First autumn frost, half of years before
- December 271 year in 10 before December 3; 9 in 10 before February 1
NOAA puts the median frost-free season at 355 days, and the season without a hard freeze (28°F) at 365 days.
A hard freeze (28°F) comes after January 1 in half of springs and before December 29 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Santa Rosa in zone 10a in ZIP code 78593, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Santa Rosa's NOAA station is in zone 10a: the coldest night of a typical year reaches 32°F (15 complete years).
Frost dates for every NOAA station in Texas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00418059; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Santa Rosa?
In a normal year in Santa Rosa, 166 days a year reach 90°F (21 of them 100°F or more), 2 nights fall to 32°F or colder and 70 days bring measurable precipitation.
- Days at 90°F or more
- 166a normal year
- Days at 100°F or more
- 21a normal year
- Nights at 32°F or colder
- 2a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 70a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00418059.
How sunny is Santa Rosa?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Santa Rosa, 4.8 kWh per square metre a day. August is the sunniest month (87%) and December the cloudiest (68%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 3.1 |
| February | 70% | 3.7 |
| March | 73% | 4.6 |
| April | 77% | 5.4 |
| May | 82% | 6.0 |
| June | 86% | 6.5 |
| July | 86% | 6.5 |
| August | 87% | 6.2 |
| September | 80% | 5.2 |
| October | 83% | 4.6 |
| November | 76% | 3.5 |
| December | 68% | 2.8 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Santa Rosa need?
A normal year in Santa Rosa brings 643 heating degree days, 88% fewer than the median U.S. place (5,373), and 4,194 cooling degree days, 4.6 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 9,080 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 207 | 54 |
| February | 114 | 99 |
| March | 52 | 196 |
| April | 10 | 319 |
| May | 0 | 487 |
| June | 0 | 594 |
| July | 0 | 651 |
| August | 0 | 663 |
| September | 0 | 519 |
| October | 7 | 367 |
| November | 68 | 169 |
| December | 184 | 77 |
| Year (annual) | 643 | 4,194 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00418059. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Santa Rosa been warmer than normal lately?
2023 averaged 77.1°F, 2.4°F above the 1991-2020 normal of 74.7°F. 1 of the 2 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 74.3°F | −0.4°F | 25.11 |
| 2023 | 77.1°F | +2.4°F | 17.60 |
Source: observed years: ACIS, station USC00418059. A year counts only with all twelve months complete.
How does Santa Rosa's climate compare?
Santa Rosa is warmer than 313 of the other 320 places with their own NOAA record in Texas, and wetter than 106. Across the 7,247 U.S. stations with normals, its annual mean of 74.7°F is warmer than 99%.
In the Köppen classification computed from these normals, Santa Rosa is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Santa Rosa share this climate record?
13 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- La Feria, TX7,036 people · 8 mi S
- Elsa, TX5,750 people · 8 mi W
- La Villa, TX3,179 people · 4 mi NW
- Edcouch, TX2,693 people · 6 mi W
- Monte Alto, TX2,260 people · 10 mi NW
- Sebastian, TX1,144 people · 7 mi NE
- Solis, TX672 people · 6 mi S
- Ratamosa, TX333 people · 5 mi S
- Laguna Seca, TX259 people · 4 mi W
- Zapata Ranch, TX210 people · 7 mi NE
- La Feria North, TX167 people · 7 mi SE
- Tierra Bonita, TX59 people · 3 mi E
- Yznaga, TX0 people · 6 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Santa Rosa's climate
What is the coldest month in Santa Rosa?
January, with a normal high of 71°F and a normal low of 49°F. The warmest is August (97°F by day, 75°F at night).
Does it snow in Santa Rosa?
Rarely: NOAA's normal is 0.1 inch a year.
What is the rainiest month in Santa Rosa?
September, with 5.56 in of precipitation in a normal year; the driest is February with 1.00 in.
What plant hardiness zone is Santa Rosa in?
The USDA's 2023 map puts Santa Rosa in zone 10a in ZIP code 78593, the nearest ZIP area. By the same method at Santa Rosa's NOAA station, the coldest night of a typical year reaches 32°F (15 years, 1991-2020): zone 10a.
How late can frost come in Santa Rosa?
In half of years the last 32°F night comes after January 10; in one year in ten it comes after February 24. Waiting until February 24 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Weslaco, TX9 miles from this station, 75.0°F a year
- Harlingen, TX14 miles from this station, 74.9°F a year
- Raymondville, TX15 miles from this station, 74.4°F a year
- Edinburg, TX18 miles from this station, 75.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made