Lexington, Texas climate: Normal weather by month, frost dates and records
Lexington's normal year runs from 39°F January nights to 96°F August afternoons, with 37.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 20.1°C, January lows of 4°C, August highs of 36°C, 958 mm of precipitation a year.
- NOAA stationLexington
- Station IDUSC00415193
- Location30.41°N 97.01°W
- Elevation423 ft (129 m)
- Population1,319
On October 23, the normal high in Lexington is 79°F and the normal low 55°F, and the chance of measurable rain or snow is 19%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Lexington.
- Jan 61° 39°
- Feb 65° 43°
- Mar 72° 50°
- Apr 79° 56°
- May 85° 65°
- Jun 92° 72°
- Jul 95° 74°
- Aug 96° 73°
- Sep 90° 68°
- Oct 82° 58°
- Nov 71° 48°
- Dec 63° 40°
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 Lexington each month?
August is the warmest month, with normal highs of 96°F; January the coldest, with normal lows of 39°F. The most precipitation falls in May (4.68 in), the least in July (2.11 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 61°F | 39°F | 49.9°F | 3.08 | 7 | <1 | 9 | 10 h 20 min |
| February | 65°F | 43°F | 53.6°F | 2.24 | 6 | <1 | 5 | 11 h 10 min |
| March | 72°F | 50°F | 60.6°F | 2.94 | 6 | <1 | 2 | 12 h |
| April | 79°F | 56°F | 67.4°F | 2.61 | 6 | 1 | <1 | 12 h 50 min |
| May | 85°F | 65°F | 75.2°F | 4.68 | 6 | 8 | <1 | 13 h 40 min |
| June | 92°F | 72°F | 81.7°F | 3.21 | 5 | 22 | <1 | 14 h 10 min |
| July | 95°F | 74°F | 84.3°F | 2.11 | 4 | 28 | <1 | 14 h |
| August | 96°F | 73°F | 84.7°F | 2.62 | 5 | 28 | <1 | 13 h 20 min |
| September | 90°F | 68°F | 79.1°F | 3.07 | 5 | 18 | <1 | 12 h 20 min |
| October | 82°F | 58°F | 69.6°F | 4.59 | 5 | 5 | <1 | 11 h 30 min |
| November | 71°F | 48°F | 59.2°F | 3.34 | 6 | <1 | 3 | 10 h 40 min |
| December | 63°F | 40°F | 51.6°F | 3.23 | 6 | <1 | 8 | 10 h 10 min |
| Year (annual) | 79°F | 57°F | 68.1°F | 37.72 | 67 | 111 | 27 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 16°C | 4°C | 9.9°C | 78 mm |
| February | 18°C | 6°C | 12.0°C | 57 mm |
| March | 22°C | 10°C | 15.9°C | 75 mm |
| April | 26°C | 13°C | 19.7°C | 66 mm |
| May | 30°C | 18°C | 24.0°C | 119 mm |
| June | 33°C | 22°C | 27.6°C | 82 mm |
| July | 35°C | 23°C | 29.1°C | 54 mm |
| August | 36°C | 23°C | 29.3°C | 67 mm |
| September | 32°C | 20°C | 26.2°C | 78 mm |
| October | 28°C | 14°C | 20.9°C | 117 mm |
| November | 21°C | 9°C | 15.1°C | 85 mm |
| December | 17°C | 5°C | 10.9°C | 82 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00415193; 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 Lexington?
Normal highs sit between 65°F and 85°F in March, April, October and November. Of those, October has the fewest days with rain (5).
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 USC00415193.
When is the last frost in Lexington?
In Lexington, the last spring frost (32°F) comes after March 5 in half of years and after March 31 in one year in ten; the first autumn frost comes before November 21 in half of years and before November 3 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
- March 51 year in 10 after March 31; 9 in 10 after February 10
- First autumn frost, half of years before
- November 211 year in 10 before November 3; 9 in 10 before December 11
NOAA puts the median frost-free season at 262 days, and the season without a hard freeze (28°F) at 294 days.
A hard freeze (28°F) comes after February 17 in half of springs and before December 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Lexington in zone 9a in ZIP code 78947, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Lexington's NOAA station is in zone 9a: the coldest night of a typical year reaches 20°F (25 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 USC00415193; 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 Lexington?
In a normal year in Lexington, 111 days a year reach 90°F (15 of them 100°F or more), 27 nights fall to 32°F or colder and 67 days bring measurable precipitation.
- Days at 90°F or more
- 111a normal year
- Days at 100°F or more
- 15a normal year
- Nights at 32°F or colder
- 27a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 67a normal year
The highest temperature in this station's record (since 1962) is 111°F, on September 6, 2000; the lowest is 2°F, on December 23, 1989.
The wettest calendar year on that record is 2015, with 65.52 in; the snowiest season is 1965–66, with 6.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00415193; records: ACIS (NOAA Regional Climate Centers), station USC00415193. Records use complete months only; a month missing more than three days is left out.
How sunny is Lexington?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Lexington, 4.8 kWh per square metre a day. August is the sunniest month (88%) and February the cloudiest (68%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 73% | 3.0 |
| February | 68% | 3.5 |
| March | 71% | 4.5 |
| April | 75% | 5.4 |
| May | 76% | 5.8 |
| June | 84% | 6.7 |
| July | 87% | 6.7 |
| August | 88% | 6.4 |
| September | 82% | 5.2 |
| October | 81% | 4.3 |
| November | 76% | 3.3 |
| December | 72% | 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 Lexington need?
A normal year in Lexington brings 1,774 heating degree days, 67% fewer than the median U.S. place (5,373), and 2,922 cooling degree days, 3.2 times the median (908). Three months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 6,966 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 477 | 8 |
| February | 333 | 14 |
| March | 190 | 52 |
| April | 61 | 133 |
| May | 7 | 323 |
| June | 0 | 503 |
| July | 0 | 597 |
| August | 0 | 611 |
| September | 2 | 425 |
| October | 50 | 195 |
| November | 226 | 51 |
| December | 428 | 13 |
| Year (annual) | 1,774 | 2,922 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00415193. 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 Lexington been warmer than normal lately?
Over 37 complete years from 1964 to 2018, the station's annual mean temperature rose at a fitted 3.7°F per century (+0.20°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Lexington's climate compare?
Lexington is warmer than 225 of the other 320 places with their own NOAA record in Texas, and wetter than 213. Across the 7,247 U.S. stations with normals, its annual mean of 68.1°F is warmer than 93%.
In the Köppen classification computed from these normals, Lexington 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 Lexington 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.
- Giddings, TX5,324 people · 16 mi S
- Cade Lakes, TX330 people · 16 mi NE
- Dime Box, TX199 people · 12 mi E
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 Lexington's climate
What is the coldest month in Lexington?
January, with a normal high of 61°F and a normal low of 39°F. The warmest is August (96°F by day, 73°F at night).
Does it snow in Lexington?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Lexington?
May, with 4.68 in of precipitation in a normal year; the driest is July with 2.11 in.
What plant hardiness zone is Lexington in?
The USDA's 2023 map puts Lexington in zone 9a in ZIP code 78947, the nearest ZIP area. By the same method at Lexington's NOAA station, the coldest night of a typical year reaches 20°F (25 years, 1991-2020): zone 9a.
How late can frost come in Lexington?
In half of years the last 32°F night comes after March 5; in one year in ten it comes after March 31. Waiting until March 31 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Elgin, TX22 miles from this station, 68.0°F a year
- Taylor, TX27 miles from this station, 67.4°F a year
- Granger, TX29 miles from this station, 67.5°F a year
- Somerville, TX29 miles from this station, 67.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made