Alvin, Texas climate: Normal weather by month, frost dates and records
Alvin's normal year runs from 44°F January nights to 91°F July afternoons, with 55.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 20.7°C, January lows of 6°C, July highs of 33°C, 1,399 mm of precipitation a year.
- NOAA stationAlvin
- Station IDUSC00410204
- Location29.37°N 95.23°W
- Elevation28 ft (9 m)
- Population29,869
On October 23, the normal high in Alvin is 80°F and the normal low 58°F, and the chance of measurable rain or snow is 24%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Alvin.
- Jan 63° 44°
- Feb 67° 48°
- Mar 73° 54°
- Apr 78° 60°
- May 85° 68°
- Jun 89° 72°
- Jul 91° 74°
- Aug 91° 74°
- Sep 89° 70°
- Oct 81° 61°
- Nov 73° 52°
- Dec 65° 45°
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 Alvin each month?
July is the warmest month, with normal highs of 91°F; January the coldest, with normal lows of 44°F. The most precipitation falls in June (5.98 in), the least in February (2.98 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 63°F | 44°F | 53.4°F | 4.87 | 10 | <1 | 4 | 10 h 30 min |
| February | 67°F | 48°F | 57.2°F | 2.98 | 10 | <1 | 2 | 11 h 10 min |
| March | 73°F | 54°F | 63.3°F | 3.08 | 9 | <1 | 1 | 12 h |
| April | 78°F | 60°F | 68.7°F | 4.23 | 7 | 1 | <1 | 12 h 50 min |
| May | 85°F | 68°F | 76.1°F | 4.64 | 7 | 4 | <1 | 13 h 40 min |
| June | 89°F | 72°F | 80.7°F | 5.98 | 9 | 14 | <1 | 14 h |
| July | 91°F | 74°F | 82.5°F | 4.20 | 10 | 23 | <1 | 13 h 50 min |
| August | 91°F | 74°F | 82.5°F | 5.60 | 10 | 23 | <1 | 13 h 10 min |
| September | 89°F | 70°F | 79.5°F | 5.37 | 11 | 13 | <1 | 12 h 20 min |
| October | 81°F | 61°F | 71.0°F | 5.34 | 8 | 1 | <1 | 11 h 30 min |
| November | 73°F | 52°F | 62.0°F | 4.31 | 8 | <1 | 1 | 10 h 40 min |
| December | 65°F | 45°F | 55.0°F | 4.47 | 11 | <1 | 3 | 10 h 20 min |
| Year (annual) | 79°F | 60°F | 69.3°F | 55.07 | 109 | 78 | 10 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 17°C | 6°C | 11.9°C | 124 mm |
| February | 19°C | 9°C | 14.0°C | 76 mm |
| March | 23°C | 12°C | 17.4°C | 78 mm |
| April | 25°C | 15°C | 20.4°C | 107 mm |
| May | 29°C | 20°C | 24.5°C | 118 mm |
| June | 32°C | 22°C | 27.1°C | 152 mm |
| July | 33°C | 23°C | 28.1°C | 107 mm |
| August | 33°C | 23°C | 28.1°C | 142 mm |
| September | 31°C | 21°C | 26.4°C | 136 mm |
| October | 27°C | 16°C | 21.7°C | 136 mm |
| November | 23°C | 11°C | 16.7°C | 109 mm |
| December | 18°C | 7°C | 12.8°C | 114 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00410204; 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 Alvin?
Normal highs sit between 65°F and 85°F in February, March, April, May, October and November. Of those, May has the fewest days with rain (7).
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 USC00410204.
When is the last frost in Alvin?
In Alvin, the last spring frost (32°F) comes after February 14 in half of years and after March 13 in one year in ten; the first autumn frost comes before December 5 in half of years and before November 14 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- February 141 year in 10 after March 13; 9 in 10 after January 15
- First autumn frost, half of years before
- December 51 year in 10 before November 14; 9 in 10 before January 8
NOAA puts the median frost-free season at 298 days, and the season without a hard freeze (28°F) at 336 days.
A hard freeze (28°F) comes after January 25 in half of springs and before December 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Alvin in zone 9b in ZIP code 77511.
Frost dates for every NOAA station in Texas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00410204; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Alvin?
In a normal year in Alvin, 78 days a year reach 90°F (3 of them 100°F or more), 10 nights fall to 32°F or colder and 109 days bring measurable precipitation.
- Days at 90°F or more
- 78a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 10a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 109a normal year
The highest temperature in this station's record (since 1903) is 108°F, on July 20, 2000; the lowest is 8°F, on December 24, 1989.
The wettest calendar year on that record is 1979, with 102.58 in; the snowiest season is 1959–60, with 4.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00410204; records: ACIS (NOAA Regional Climate Centers), station USC00410204. Records use complete months only; a month missing more than three days is left out.
How sunny is Alvin?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Alvin, 4.7 kWh per square metre a day. October is the sunniest month (83%) and February the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.9 |
| February | 66% | 3.3 |
| March | 72% | 4.5 |
| April | 74% | 5.3 |
| May | 79% | 6.0 |
| June | 81% | 6.3 |
| July | 81% | 6.1 |
| August | 82% | 5.8 |
| September | 80% | 5.0 |
| October | 83% | 4.4 |
| November | 77% | 3.3 |
| December | 70% | 2.6 |
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 Alvin need?
A normal year in Alvin brings 1,273 heating degree days, 76% fewer than the median U.S. place (5,373), and 2,868 cooling degree days, 3.2 times the median (908). Two months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 7,224 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 369 | 9 |
| February | 239 | 21 |
| March | 121 | 67 |
| April | 37 | 148 |
| May | 2 | 346 |
| June | 0 | 469 |
| July | 0 | 541 |
| August | 0 | 544 |
| September | 1 | 434 |
| October | 25 | 211 |
| November | 151 | 61 |
| December | 329 | 17 |
| Year (annual) | 1,273 | 2,868 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00410204. 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.
How does Alvin's climate compare?
Alvin is warmer than 246 of the other 320 places with their own NOAA record in Texas, and wetter than 293. Across the 7,247 U.S. stations with normals, its annual mean of 69.3°F is warmer than 94%.
In the Köppen classification computed from these normals, Alvin 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 Alvin share this climate record?
3 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.
- Rosharon, TX1,596 people · 13 mi W
- Hillcrest Village, TX695 people · 2 mi N
- Liverpool, TX551 people · 5 mi SW
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 Alvin's climate
What is the coldest month in Alvin?
January, with a normal high of 63°F and a normal low of 44°F. The warmest is July (91°F by day, 74°F at night).
Does it snow in Alvin?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Alvin?
June, with 5.98 in of precipitation in a normal year; the driest is February with 2.98 in.
What plant hardiness zone is Alvin in?
The USDA's 2023 map puts Alvin in zone 9b in ZIP code 77511.
How late can frost come in Alvin?
In half of years the last 32°F night comes after February 14; in one year in ten it comes after March 13. Waiting until March 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Alvin in OctoberThis month day by day, its records and recent years
- Texas climateThe statewide normals and every place in the state
- Houston Clover Field, TX11 miles from this station, 71.3°F a year
- League City, TX12 miles from this station, 70.6°F a year
- Houston Hobby Airport, TX19 miles from this station, 71.1°F a year
- Angleton, TX22 miles from this station, 70.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made