Port Mansfield has some of the mildest winter nights among U.S. towns
On a normal July day the thermometer tops out near 91°. Expect the heaviest rain or snow in September and the lightest in January. It is a dry place: less rain and snow fall here than on 87% of U.S. towns. Garden chairs stay out from November to April, the months with highs of 68–81°.
A year in Port Mansfield at a glance
Each month’s typical high and low, and what it brings.
What stands out about Port Mansfield’s climate
Compared with towns across the U.S., with Port Mansfield’s place in Texas beside it.
What a year in Port Mansfield feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
A freeze most winters
Frost and day counts come from NOAA’s station at Port Mansfield, TX, 1.2 miles from the town’s center, at about the same height.
The 2023 USDA map puts Port Mansfield’s center in zone 10a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 33°. 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 26 inches of rain a year
September is the wettest month and January the driest. Rain falls on about 59 days a year. Snow is rare: about 0.1" in a normal year at Port Mansfield, TX, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Port Mansfield
15% 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 Port Mansfield, TX.
Living with Port Mansfield’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10a. Frost comes about 6 winters in 10, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, November and December. 2.9 miles of trails are waiting.
Parks & trails →Cold waves are 44% of the yearly building losses FEMA expects in Port Mansfield from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →Port Mansfield and similar climates
TownRatings has no climate map of the towns around Port Mansfield yet.
Climates most like Port Mansfield’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 Mansfield, TX | 51° | 91° | 26" | 0.1" |
| La Cañada Flintridge, CA | 45° | 90° | 22" | 0.0" |
| Waihee-Waiehu, HI | 64° | 89° | 16" | 0.0" |
| Grants Pass, OR | 34° | 90° | 33" | 0.9" |
| Marathon, FL | 64° | 90° | 42" | 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 Mansfield averaged 1.5° warmer than the 1900s. The biggest change is in February (+2.6°).
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 Mansfield compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Port Mansfield’s place among Texas’.
Port Mansfield weather by month
Highs, lows and precipitation from NOAA’s grid at Port Mansfield’s center; snow, wet days and snow on the ground from Port Mansfield, TX. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 68° | 51° | 1.1" | 0.0" | 6 | 0 | 53° – 66° |
| February | 71° | 56° | 1.2" | 0.0" | 5 | 0 | 56° – 71° |
| March | 76° | 61° | 1.5" | 0.0" | 4 | 0 | 62° – 75° |
| April | 81° | 67° | 1.4" | 0.0" | 4 | 0 | 69° – 79° |
| May | 86° | 74° | 2.6" | 0.0" | 4 | 0 | 75° – 82° |
| June | 90° | 77° | 3.0" | 0.0" | 4 | 0 | 81° – 87° |
| July | 91° | 78° | 1.9" | 0.0" | 4 | 0 | 82° – 87° |
| August | 92° | 78° | 1.8" | 0.0" | 3 | 0 | 83° – 88° |
| September | 89° | 75° | 4.9" | 0.0" | 9 | 0 | 79° – 85° |
| October | 84° | 69° | 3.2" | 0.0" | 6 | 0 | 74° – 80° |
| November | 76° | 61° | 1.8" | 0.0" | 5 | 0 | 62° – 74° |
| December | 70° | 53° | 1.4" | 0.1" | 6 | 0 | 55° – 65° |
| Year | 81° | 67° | 25.8" | 0.1" | 59 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 56° to 71°. August is the most reliable, staying within 5°.
Where Port Mansfield’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 Mansfield’s center.
- Snow: Port Mansfield, TX (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Port Mansfield, TX, 1.2 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 Mansfield’s climate
What is the weather like in Port Mansfield?
A typical July afternoon reaches 91°, a January night drops to 51°, and snow is almost unheard of. Milder January nights than 97% of U.S. towns; hotter July afternoons than 84% of U.S. towns.
How cold does it get in Port Mansfield in winter?
January nights average 51°. About 2 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 53°.
How much snow does Port Mansfield get?
About 0.1 inches in a normal winter at Port Mansfield, TX, so most winters see none.
How hot does it get in Port Mansfield?
July, with a typical high of 91° and a low of 78°. About 68 days a year reach 90° (Port Mansfield, TX).
When is the first and last frost in Port Mansfield?
There is no reliable frost date: a 32° night comes in about 56% of winters at Port Mansfield, TX, so most years bring a freeze but some pass without one.
What growing zone is Port Mansfield in?
Zone 10a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 33°.
What is the best time of year to visit Port Mansfield?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Port Mansfield 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 Mansfield.
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.