Sealy, Texas climate: Normal weather by month, frost dates and records
Sealy's normal year runs from 42°F January nights to 95°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 20.8°C, January lows of 6°C, July highs of 35°C.
- NOAA stationSealy
- Station IDUSC00418160
- Location29.77°N 96.15°W
- Elevation196 ft (60 m)
- From the center1 miles
- Population7,553
On October 23, the normal high in Sealy is 80°F and the normal low 57°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Sealy.
- Jan 64° 42°
- Feb 68° 45°
- Mar 74° 52°
- Apr 79° 58°
- May 86° 66°
- Jun 92° 72°
- Jul 95° 74°
- Aug 95° 73°
- Sep 90° 69°
- Oct 82° 59°
- Nov 73° 50°
- Dec 66° 44°
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 Sealy each month?
July is the warmest month, with normal highs of 95°F; January the coldest, with normal lows of 42°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 64°F | 42°F | 52.8°F | – | <1 | 5 | 10 h 30 min |
| February | 68°F | 45°F | 56.4°F | – | <1 | 2 | 11 h 10 min |
| March | 74°F | 52°F | 62.6°F | – | <1 | 1 | 12 h |
| April | 79°F | 58°F | 68.5°F | – | 1 | <1 | 12 h 50 min |
| May | 86°F | 66°F | 76.1°F | – | 7 | <1 | 13 h 40 min |
| June | 92°F | 72°F | 82.2°F | – | 20 | <1 | 14 h |
| July | 95°F | 74°F | 84.2°F | – | 29 | <1 | 13 h 50 min |
| August | 95°F | 73°F | 84.1°F | – | 27 | <1 | 13 h 20 min |
| September | 90°F | 69°F | 79.6°F | – | 17 | <1 | 12 h 20 min |
| October | 82°F | 59°F | 70.8°F | – | 4 | <1 | 11 h 30 min |
| November | 73°F | 50°F | 61.2°F | – | <1 | 2 | 10 h 40 min |
| December | 66°F | 44°F | 54.7°F | – | <1 | 4 | 10 h 10 min |
| Year (annual) | 80°F | 59°F | 69.4°F | – | 105 | 13 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 18°C | 6°C | 11.6°C |
| February | 20°C | 7°C | 13.6°C |
| March | 23°C | 11°C | 17.0°C |
| April | 26°C | 14°C | 20.3°C |
| May | 30°C | 19°C | 24.5°C |
| June | 34°C | 22°C | 27.9°C |
| July | 35°C | 23°C | 29.0°C |
| August | 35°C | 23°C | 28.9°C |
| September | 32°C | 21°C | 26.4°C |
| October | 28°C | 15°C | 21.6°C |
| November | 23°C | 10°C | 16.2°C |
| December | 19°C | 6°C | 12.6°C |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00418160; 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 Sealy?
Normal highs sit between 65°F and 85°F in February, March, April, October, November and December.
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 USC00418160.
When is the last frost in Sealy?
In Sealy, the last spring frost (32°F) comes after February 28 in half of years and after March 21 in one year in ten; the first autumn frost comes before November 30 in half of years and before November 9 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 281 year in 10 after March 21; 9 in 10 after January 30
- First autumn frost, half of years before
- November 301 year in 10 before November 9; 9 in 10 before December 29
NOAA puts the median frost-free season at 276 days, and the season without a hard freeze (28°F) at 314 days.
A hard freeze (28°F) comes after February 10 in half of springs and before December 20 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Sealy in zone 9a in ZIP code 77474, the nearest ZIP area.
Frost dates for every NOAA station in Texas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00418160; 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 Sealy?
In a normal year in Sealy, 105 days a year reach 90°F (12 of them 100°F or more) and 13 nights fall to 32°F or colder.
- Days at 90°F or more
- 105a normal year
- Days at 100°F or more
- 12a normal year
- Nights at 32°F or colder
- 13a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
The highest temperature in this station's record (since 1919) is 111°F, on August 6, 1990; the lowest is 0°F, on December 23, 1989.
The wettest calendar year on that record is 1941, with 69.20 in; the snowiest season is 1929–30, with 8.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00418160; records: ACIS (NOAA Regional Climate Centers), station USC00418160. Records use complete months only; a month missing more than three days is left out.
How sunny is Sealy?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Sealy, 4.7 kWh per square metre a day. August is the sunniest month (85%) and February the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.9 |
| February | 66% | 3.4 |
| March | 71% | 4.4 |
| April | 74% | 5.3 |
| May | 78% | 6.0 |
| June | 83% | 6.5 |
| July | 84% | 6.4 |
| August | 85% | 6.1 |
| September | 81% | 5.1 |
| October | 82% | 4.4 |
| November | 77% | 3.3 |
| December | 70% | 2.7 |
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 Sealy need?
A normal year in Sealy brings 1,379 heating degree days, 74% fewer than the median U.S. place (5,373), and 3,026 cooling degree days, 3.3 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 7,318 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 390 | 13 |
| February | 261 | 19 |
| March | 141 | 67 |
| April | 40 | 145 |
| May | 2 | 348 |
| June | 0 | 514 |
| July | 0 | 597 |
| August | 0 | 590 |
| September | 1 | 440 |
| October | 36 | 215 |
| November | 172 | 58 |
| December | 336 | 19 |
| Year (annual) | 1,379 | 3,026 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00418160. 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 Sealy's climate compare?
Sealy is warmer than 248 of the other 320 places with their own NOAA record in Texas. Across the 7,247 U.S. stations with normals, its annual mean of 69.4°F is warmer than 94%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Sealy share this climate record?
10 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.
- Brookshire, TX5,782 people · 12 mi E
- Weston Lakes, TX4,514 people · 15 mi SE
- East Bernard, TX2,264 people · 18 mi S
- Wallis, TX1,360 people · 11 mi SE
- San Felipe, TX717 people · 3 mi NE
- Simonton, TX662 people · 12 mi SE
- Pattison, TX628 people · 11 mi E
- Brazos Country, TX526 people · 7 mi E
- Orchard, TX343 people · 16 mi SE
- South Frydek, TX223 people · 5 mi SE
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 Sealy's climate
What is the coldest month in Sealy?
January, with a normal high of 64°F and a normal low of 42°F. The warmest is July (95°F by day, 74°F at night).
What plant hardiness zone is Sealy in?
The USDA's 2023 map puts Sealy in zone 9a in ZIP code 77474, the nearest ZIP area.
How late can frost come in Sealy?
In half of years the last 32°F night comes after February 28; in one year in ten it comes after March 21. Waiting until March 21 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Eagle Lake, TX17 miles from this station, 69.1°F a year
- Bellville, TX19 miles from this station, 68.8°F a year
- Columbus, TX26 miles from this station, 68.8°F a year
- Brenham, TX30 miles from this station, 68.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made