Photo: Nicolas Henderson from Coppell, Texas · CC BY 2.0January in Port Lavaca stays gentler than in 94% of U.S. towns
In July the day’s top temperature is typically 91°. Summer afternoons here are warmer than in 81% of U.S. towns. February has warmed most since 1901–2000, part of a 1.5° rise. The frost-free window for a garden runs roughly February 1 to December 21.
A year in Port Lavaca at a glance
Each month’s typical high and low, and what it brings.
What stands out about Port Lavaca’s climate
Compared with towns across the U.S., with Port Lavaca’s place in Texas beside it.
What a year in Port Lavaca feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 321 frost-free days a year
In half of years the last 32° night comes by February 1 and the first by December 21. Frost and day counts come from NOAA’s station at Pt Comfort, TX, 5 miles from the town’s center, at about the same height.
The 2023 USDA map puts Port Lavaca’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 27°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 40 inches of rain a year
September is the wettest month and February the driest. Rain falls on about 87 days a year. Snow is rare: about 0.0" in a normal year at Pt Comfort, TX, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Port Lavaca
24% of the work is heating, so air conditioning is the bigger bill. No month averages under 55°.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Pt Comfort, TX.
Living with Port Lavaca’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
321 frost-free days in zone 9b. The last frost comes by Feb 1 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Dec 21.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, May, October, November and December. 3.6 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Port Lavaca from natural hazards, hurricanes are the largest share (47%); heat waves, cold waves, winter storms and ice storms together are 23%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Port Lavaca and similar climates
TownRatings has no climate map of the towns around Port Lavaca yet.
Climates most like Port Lavaca’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Port Lavaca, TX | 46° | 91° | 40" | 0.0" |
| St. Simons, GA | 43° | 91° | 49" | 0.0" |
| Cloverdale, CA | 38° | 89° | 40" | 0.0" |
| Leesburg, FL | 47° | 91° | 50" | 0.0" |
| Port Royal, SC | 41° | 91° | 49" | 0.0" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Port Lavaca averaged 1.5° warmer than the 1900s. The biggest change is in February (+2.5°).
A bigger shift than in 62% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Port Lavaca compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Port Lavaca’s place among Texas’.
Port Lavaca weather by month
Highs, lows and precipitation from NOAA’s grid at Port Lavaca’s center; snow, wet days and snow on the ground from Pt Comfort, TX. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 64° | 46° | 2.9" | 0.0" | 9 | 0 | 50° – 60° |
| February | 67° | 50° | 2.0" | 0.0" | 7 | 0 | 51° – 67° |
| March | 72° | 57° | 2.9" | 0.0" | 7 | 0 | 57° – 71° |
| April | 78° | 63° | 2.4" | 0.0" | 5 | 0 | 66° – 74° |
| May | 84° | 71° | 3.9" | 0.0" | 6 | 0 | 73° – 80° |
| June | 89° | 76° | 4.3" | 0.0" | 8 | 0 | 80° – 85° |
| July | 91° | 78° | 3.4" | 0.0" | 6 | 0 | 81° – 86° |
| August | 92° | 78° | 3.5" | 0.0" | 7 | 0 | 81° – 87° |
| September | 88° | 73° | 5.0" | 0.0" | 9 | 0 | 77° – 86° |
| October | 82° | 65° | 3.9" | 0.0" | 7 | 0 | 71° – 79° |
| November | 73° | 56° | 3.1" | 0.0" | 7 | 0 | 59° – 70° |
| December | 66° | 48° | 2.7" | 0.0" | 9 | 0 | 51° – 62° |
| Year | 79° | 63° | 40.0" | 0.0" | 87 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 51° to 67°. June is the most reliable, staying within 5°.
Where Port Lavaca’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Port Lavaca’s center.
- Snow: Pt Comfort, TX.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Pt Comfort, TX, 5 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Port Lavaca’s climate
What is the weather like in Port Lavaca?
A typical July afternoon reaches 91°, a January night drops to 46°, and snow is almost unheard of. Milder January nights than 94% of U.S. towns; hotter July afternoons than 81% of U.S. towns.
How cold does it get in Port Lavaca in winter?
January nights average 46°. About 5 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 50°.
How much snow does Port Lavaca get?
About 0.0 inches in a normal winter at Pt Comfort, TX, so most winters see none.
How hot does it get in Port Lavaca?
July, with a typical high of 91° and a low of 78°. About 77 days a year reach 90° (Pt Comfort, TX).
When is the first and last frost in Port Lavaca?
In half of years the last spring frost (32°) comes by February 1 and the first fall frost by December 21, about 321 frost-free days, at Pt Comfort, TX.
What growing zone is Port Lavaca in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 27°.
What is the best time of year to visit Port Lavaca?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Port Lavaca getting warmer?
Yes: 1991–2020 averaged 1.5° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 62% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Port Lavaca.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.