Galliano, Louisiana climate: Normal weather by month, frost dates and records
Galliano's normal year runs from 45°F January nights to 89°F August afternoons, with 66.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 20.8°C, January lows of 7°C, August highs of 32°C, 1,694 mm of precipitation a year.
- NOAA stationGalliano
- Station IDUSC00163433
- Location29.46°N 90.31°W
- Elevation5 ft (2 m)
- Population (census place)6,563
On October 23, the normal high in Galliano is 78°F and the normal low 60°F, and the chance of measurable rain or snow is 23%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Galliano.
- Jan 63° 45°
- Feb 66° 48°
- Mar 71° 55°
- Apr 77° 61°
- May 83° 68°
- Jun 88° 74°
- Jul 89° 76°
- Aug 89° 76°
- Sep 86° 72°
- Oct 80° 63°
- Nov 71° 52°
- Dec 65° 47°
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 Galliano each month?
August is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 45°F. The most precipitation falls in July (9.19 in), the least in November (3.48 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 63°F | 45°F | 53.9°F | 5.58 | 9 | <1 | 4 | 10 h 30 min |
| February | 66°F | 48°F | 57.3°F | 4.16 | 9 | <1 | 2 | 11 h 10 min |
| March | 71°F | 55°F | 63.0°F | 4.66 | 8 | <1 | <1 | 12 h |
| April | 77°F | 61°F | 68.6°F | 4.37 | 6 | <1 | <1 | 12 h 50 min |
| May | 83°F | 68°F | 75.5°F | 5.09 | 7 | 1 | <1 | 13 h 40 min |
| June | 88°F | 74°F | 80.8°F | 6.87 | 12 | 9 | <1 | 14 h |
| July | 89°F | 76°F | 82.4°F | 9.19 | 16 | 16 | <1 | 13 h 50 min |
| August | 89°F | 76°F | 82.5°F | 7.64 | 15 | 17 | <1 | 13 h 10 min |
| September | 86°F | 72°F | 79.4°F | 6.62 | 11 | 6 | <1 | 12 h 20 min |
| October | 80°F | 63°F | 71.2°F | 4.34 | 8 | 1 | <1 | 11 h 30 min |
| November | 71°F | 52°F | 61.7°F | 3.48 | 7 | <1 | 1 | 10 h 40 min |
| December | 65°F | 47°F | 56.2°F | 4.68 | 9 | <1 | 2 | 10 h 20 min |
| Year (annual) | 77°F | 61°F | 69.4°F | 66.68 | 115 | 49 | 9 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 17°C | 7°C | 12.2°C | 142 mm |
| February | 19°C | 9°C | 14.1°C | 106 mm |
| March | 22°C | 13°C | 17.2°C | 118 mm |
| April | 25°C | 16°C | 20.3°C | 111 mm |
| May | 28°C | 20°C | 24.2°C | 129 mm |
| June | 31°C | 23°C | 27.1°C | 174 mm |
| July | 32°C | 24°C | 28.0°C | 233 mm |
| August | 32°C | 24°C | 28.1°C | 194 mm |
| September | 30°C | 22°C | 26.3°C | 168 mm |
| October | 26°C | 17°C | 21.8°C | 110 mm |
| November | 22°C | 11°C | 16.5°C | 88 mm |
| December | 18°C | 9°C | 13.4°C | 119 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00163433; 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 Galliano?
Normal highs sit between 65°F and 85°F in February, March, April, May, October and November. Of those, April has the fewest days with rain (6).
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 USC00163433.
When is the last frost in Galliano?
In Galliano, the last spring frost (32°F) comes after February 8 in half of years and after March 12 in one year in ten; the first autumn frost comes before December 19 in half of years and before November 20 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
- February 81 year in 10 after March 12; 9 in 10 after January 11
- First autumn frost, half of years before
- December 191 year in 10 before November 20; 9 in 10 before January 22
NOAA puts the median frost-free season at 311 days, and the season without a hard freeze (28°F) at 343 days.
A hard freeze (28°F) comes after January 28 in half of springs and before January 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Galliano in zone 9b in ZIP code 70354, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Galliano's NOAA station is in zone 9b: the coldest night of a typical year reaches 26°F (24 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 USC00163433; 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 Galliano?
In a normal year in Galliano, 49 days a year reach 90°F, 9 nights fall to 32°F or colder and 115 days bring measurable precipitation.
- Days at 90°F or more
- 49a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 9a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 115a normal year
The highest temperature in this station's record (since 1968) is 100°F, on July 16, 1971; the lowest is 10°F, on December 23, 1989.
The wettest calendar year on that record is 1991, with 90.16 in.
Source: NOAA NCEI 1991-2020 annual normals, station USC00163433; records: ACIS (NOAA Regional Climate Centers), station USC00163433. Records use complete months only; a month missing more than three days is left out.
How sunny is Galliano?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Galliano, 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 Galliano need?
A normal year in Galliano brings 1,267 heating degree days, 76% fewer than the median U.S. place (5,373), and 2,886 cooling degree days, 3.2 times the median (908). Two months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 7,261 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 361 | 16 |
| February | 244 | 27 |
| March | 135 | 73 |
| April | 40 | 148 |
| May | 2 | 329 |
| June | 0 | 475 |
| July | 0 | 541 |
| August | 0 | 543 |
| September | 0 | 431 |
| October | 28 | 220 |
| November | 157 | 58 |
| December | 300 | 26 |
| Year (annual) | 1,267 | 2,886 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00163433. 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 Galliano been warmer than normal lately?
Over 33 complete years from 1969 to 2019, the station's annual mean temperature rose at a fitted 4.7°F per century (+0.26°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 Galliano's climate compare?
Galliano is warmer than 53 of the other 64 places with their own NOAA record in Louisiana, and wetter than 58. Across the 7,247 U.S. stations with normals, its annual mean of 69.4°F is warmer than 94%.
In the Köppen classification computed from these normals, Galliano 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 Galliano 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.
- Larose, LA5,937 people · 8 mi NW
- Cut Off, LA5,157 people · 4 mi N
- Chauvin, LA2,531 people · 17 mi W
- Golden Meadow, LA1,634 people · 6 mi S
- Montegut, LA1,264 people · 15 mi W
- Grand Isle, LA991 people · 24 mi SE
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 Galliano's climate
What is the coldest month in Galliano?
January, with a normal high of 63°F and a normal low of 45°F. The warmest is August (89°F by day, 76°F at night).
Does it snow in Galliano?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Galliano?
July, with 9.19 in of precipitation in a normal year; the driest is November with 3.48 in.
What plant hardiness zone is Galliano in?
The USDA's 2023 map puts Galliano in zone 9b in ZIP code 70354, the nearest ZIP area. By the same method at Galliano's NOAA station, the coldest night of a typical year reaches 26°F (24 years, 1991-2020): zone 9b.
How late can frost come in Galliano?
In half of years the last 32°F night comes after February 8; in one year in ten it comes after March 12. Waiting until March 12 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Louisiana climateThe statewide normals and every place in the state
- Marrero, LA25 miles from this station, 68.4°F a year
- Lsu Citrus Research Station, LA30 miles from this station, 69.9°F a year
- Houma, LA33 miles from this station, 69.6°F a year
- Thibodaux, LA35 miles from this station, 70.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made