Terrytown, Louisiana climate: Normal weather by month, frost dates and records
Terrytown's normal year runs from 45°F January nights to 92°F July afternoons, with 65.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 21.3°C, January lows of 7°C, July highs of 33°C, 1,675 mm of precipitation a year.
- NOAA stationTerrytown (3 mi S)
- Station IDUSC00168941
- Location29.91°N 90.03°W
- Elevation10 ft (3 m)
- From the centerunder 1 mile
- Population (census place)25,844
On October 22, the normal high in Terrytown is 79°F and the normal low 61°F, and the chance of measurable rain or snow is 20%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Terrytown.
- Jan 63° 45°
- Feb 66° 49°
- Mar 73° 54°
- Apr 78° 61°
- May 85° 68°
- Jun 90° 75°
- Jul 92° 76°
- Aug 92° 76°
- Sep 89° 73°
- Oct 81° 63°
- Nov 72° 53°
- Dec 65° 48°
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 Terrytown each month?
July is the warmest month, with normal highs of 92°F; January the coldest, with normal lows of 45°F. The most precipitation falls in July (7.32 in), the least in October (3.74 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 63°F | 45°F | 53.9°F | 5.76 | 9 | <1 | 4 | 10 h 20 min |
| February | 66°F | 49°F | 57.4°F | 4.04 | 8 | <1 | 1 | 11 h 10 min |
| March | 73°F | 54°F | 63.4°F | 5.16 | 7 | <1 | <1 | 12 h |
| April | 78°F | 61°F | 69.5°F | 5.20 | 7 | <1 | <1 | 12 h 50 min |
| May | 85°F | 68°F | 76.7°F | 4.66 | 6 | 5 | <1 | 13 h 40 min |
| June | 90°F | 75°F | 82.2°F | 6.86 | 12 | 20 | <1 | 14 h |
| July | 92°F | 76°F | 84.1°F | 7.32 | 15 | 25 | <1 | 13 h 50 min |
| August | 92°F | 76°F | 84.0°F | 6.84 | 15 | 24 | <1 | 13 h 20 min |
| September | 89°F | 73°F | 80.8°F | 6.81 | 11 | 14 | <1 | 12 h 20 min |
| October | 81°F | 63°F | 72.1°F | 3.74 | 7 | 2 | <1 | 11 h 30 min |
| November | 72°F | 53°F | 62.3°F | 4.15 | 7 | <1 | <1 | 10 h 40 min |
| December | 65°F | 48°F | 56.4°F | 5.40 | 9 | <1 | 1 | 10 h 10 min |
| Year (annual) | 79°F | 62°F | 70.3°F | 65.94 | 111 | 90 | 7 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 17°C | 7°C | 12.2°C | 146 mm |
| February | 19°C | 9°C | 14.1°C | 103 mm |
| March | 23°C | 12°C | 17.4°C | 131 mm |
| April | 26°C | 16°C | 20.8°C | 132 mm |
| May | 30°C | 20°C | 24.8°C | 118 mm |
| June | 32°C | 24°C | 27.9°C | 174 mm |
| July | 33°C | 25°C | 28.9°C | 186 mm |
| August | 33°C | 25°C | 28.9°C | 174 mm |
| September | 32°C | 23°C | 27.1°C | 173 mm |
| October | 27°C | 17°C | 22.3°C | 95 mm |
| November | 22°C | 12°C | 16.8°C | 105 mm |
| December | 18°C | 9°C | 13.6°C | 137 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00168941; 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 Terrytown?
Normal highs sit between 65°F and 85°F in February, March, April, October, November and December. Of those, April has the fewest days with rain (7).
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 USC00168941.
When is the last frost in Terrytown?
In Terrytown, the last spring frost (32°F) comes after February 1 in half of years and after March 6 in one year in ten; the first autumn frost comes before December 31 in half of years and before December 1 in one year in ten. A night at 32°F or colder comes at all in 90% of years here (NOAA).
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- February 11 year in 10 after March 6; 9 in 10 after January 2
- First autumn frost, half of years before
- December 311 year in 10 before December 1; 9 in 10 before January 29
NOAA puts the median frost-free season at 330 days, and the season without a hard freeze (28°F) at 361 days.
A hard freeze (28°F) comes after January 23 in half of springs and before January 8 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Terrytown in zone 9b in ZIP code 70056. By the map's own method, the average of each year's coldest night over 1991-2020, Terrytown's NOAA station is in zone 9b: the coldest night of a typical year reaches 27°F (18 complete years).
Frost dates for every NOAA station in Louisiana · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00168941; 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 Terrytown?
In a normal year in Terrytown, 90 days a year reach 90°F (1 of them 100°F or more), 7 nights fall to 32°F or colder and 111 days bring measurable precipitation.
- Days at 90°F or more
- 90a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 7a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 111a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00168941.
How sunny is Terrytown?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Terrytown, 4.7 kWh per square metre a day. October is the sunniest month (85%) and February the cloudiest (73%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 3.0 |
| February | 73% | 3.6 |
| March | 79% | 4.9 |
| April | 81% | 5.8 |
| May | 84% | 6.5 |
| June | 79% | 6.1 |
| July | 75% | 5.6 |
| August | 76% | 5.4 |
| September | 81% | 5.1 |
| October | 85% | 4.5 |
| November | 82% | 3.5 |
| December | 74% | 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 Terrytown need?
A normal year in Terrytown brings 1,206 heating degree days, 78% fewer than the median U.S. place (5,373), and 3,150 cooling degree days, 3.5 times the median (908). One month needs 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 7,565 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 357 | 15 |
| February | 236 | 25 |
| March | 120 | 72 |
| April | 32 | 167 |
| May | 2 | 366 |
| June | 0 | 517 |
| July | 0 | 591 |
| August | 0 | 591 |
| September | 0 | 476 |
| October | 23 | 245 |
| November | 141 | 58 |
| December | 296 | 29 |
| Year (annual) | 1,206 | 3,150 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00168941. 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 Terrytown's climate compare?
Terrytown is warmer than 61 of the other 64 places with their own NOAA record in Louisiana, and wetter than 55. Across the 7,247 U.S. stations with normals, its annual mean of 70.3°F is warmer than 95%.
In the Köppen classification computed from these normals, Terrytown 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 Terrytown share this climate record?
6 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.
- Harvey, LA21,710 people · 2 mi SW
- Gretna, LA17,185 people · 1 mi W
- Timberlane, LA11,169 people · 2 mi S
- Belle Chasse, LA11,046 people · 4 mi SE
- Westwego, LA8,231 people · 7 mi W
- New Orleans Station, LA2,414 people · 6 mi S
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 Terrytown's climate
What is the coldest month in Terrytown?
January, with a normal high of 63°F and a normal low of 45°F. The warmest is July (92°F by day, 76°F at night).
Does it snow in Terrytown?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Terrytown?
July, with 7.32 in of precipitation in a normal year; the driest is October with 3.74 in.
What plant hardiness zone is Terrytown in?
The USDA's 2023 map puts Terrytown in zone 9b in ZIP code 70056. By the same method at Terrytown's NOAA station, the coldest night of a typical year reaches 27°F (18 years, 1991-2020): zone 9b.
How late can frost come in Terrytown?
In half of years the last 32°F night comes after February 1; in one year in ten it comes after March 6. Waiting until March 6 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Louisiana climateThe statewide normals and every place in the state
- Chalmette, LA4 miles from this station, 69.9°F a year
- Marrero, LA10 miles from this station, 68.4°F a year
- St Bernard, LA12 miles from this station, 68.6°F a year
- New Orleans, LA14 miles from this station, 70.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made