Photo: Infrogmation of New Orleans · CC BY 2.0Few U.S. towns get more rain and snow than Terrytown: 63 inches a year
The warmest part of a July day comes in at 91° on average. By January nights alone, it runs milder than 93% of U.S. towns. February has warmed most since 1901–2000, part of a 0.9° rise. Garden planting can start around February 1; autumn frost returns near December 31.
A year in Terrytown at a glance
Each month’s typical high and low, and what it brings.
What stands out about Terrytown’s climate
Compared with towns across the U.S., with Terrytown’s place in Louisiana beside it.
What a year in Terrytown feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 330 frost-free days a year
In half of years the last 32° night comes by February 1 and the first by December 31. Frost and day counts come from NOAA’s station at Terrytown 3s, LA, 0.6 miles from the town’s center, at about the same height.
The 2023 USDA map puts Terrytown’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 28°. 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 63 inches of rain a year
July is the wettest month and October the driest. Rain falls on about 96 days a year. Snow is rare: about 0.0" in a normal year at Gretna, LA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Terrytown
28% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from January.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Terrytown 3s, LA.
Living with Terrytown’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
330 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 31.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, October, November and December. 0.3 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Terrytown from natural hazards, hurricanes are the largest share (73%); heat waves, cold waves, winter storms and ice storms together are 8%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Terrytown and its neighbors
Every town next door is within a degree of Terrytown in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Terrytown’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 |
|---|---|---|---|---|
| Terrytown, LA | 44° | 91° | 63" | 0.0" |
| Ferry Pass, FL | 44° | 90° | 64" | 0.0" |
| Port Arthur, TX | 44° | 91° | 61" | 0.0" |
| Atmore, AL | 39° | 92° | 64" | 0.1" |
| Magalia, CA | 38° | 92° | 61" | 0.1" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Terrytown averaged 0.9° warmer than the 1900s. The biggest change is in February (+1.3°).
A smaller shift than in 86% 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 Terrytown compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Terrytown’s place among Louisiana’s.
Terrytown weather by month
Highs, lows and precipitation from NOAA’s grid at Terrytown’s center; snow, wet days and snow on the ground from Gretna, LA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 63° | 44° | 5.3" | 0.0" | 9 | 0 | 46° – 60° |
| February | 66° | 48° | 4.2" | 0.0" | 7 | 0 | 48° – 67° |
| March | 72° | 53° | 4.7" | 0.0" | 7 | 0 | 57° – 70° |
| April | 78° | 60° | 5.0" | 0.0" | 5 | 0 | 64° – 73° |
| May | 85° | 67° | 5.2" | 0.0" | 6 | 0 | 73° – 79° |
| June | 89° | 73° | 7.0" | 0.0" | 12 | 0 | 79° – 84° |
| July | 91° | 75° | 7.7" | 0.0" | 12 | 0 | 81° – 85° |
| August | 91° | 75° | 6.6" | 0.0" | 9 | 0 | 80° – 86° |
| September | 88° | 72° | 5.4" | 0.0" | 9 | 0 | 77° – 83° |
| October | 80° | 62° | 3.7" | 0.0" | 5 | 0 | 68° – 76° |
| November | 71° | 52° | 3.8" | 0.0" | 7 | 0 | 56° – 66° |
| December | 65° | 47° | 4.6" | 0.0" | 8 | 0 | 49° – 63° |
| Year | 78° | 61° | 63.0" | 0.0" | 96 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 48° to 67°. July is the most reliable, staying within 4°.
Where Terrytown’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 Terrytown’s center.
- Snow: Gretna, LA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Terrytown 3s, LA, 0.6 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 Terrytown’s climate
What is the weather like in Terrytown?
A typical July afternoon reaches 91°, a January night drops to 44°, and snow is almost unheard of. Milder January nights than 93% of U.S. towns; hotter July afternoons than 81% of U.S. towns.
How cold does it get in Terrytown in winter?
January nights average 44°. About 7 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 46°.
How much snow does Terrytown get?
About 0.0 inches in a normal winter at Gretna, LA, so most winters see none.
How hot does it get in Terrytown?
July, with a typical high of 91° and a low of 75°. About 90 days a year reach 90° (Terrytown 3s, LA).
When is the first and last frost in Terrytown?
In half of years the last spring frost (32°) comes by February 1 and the first fall frost by December 31, about 330 frost-free days, at Terrytown 3s, LA.
What growing zone is Terrytown in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 28°.
What is the best time of year to visit Terrytown?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Terrytown getting warmer?
Yes: 1991–2020 averaged 0.9° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 86% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Terrytown.
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.