Grand Coteau, LA Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Grand Coteau's primary NOAA station, GRAND COTEAU.
The climate verdict for Grand Coteau
Water is the standout signal in Grand Coteau, Louisiana: 61.6 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 68°F. Its climate comfort score of 73/100 (good) lands mid-pack nationally, exceeding 66% of station-mapped location scores.
- 68°F
- yearly average temperature, NOAA normal
- 73/100
- comfort score, above 66% of station-mapped location scores
- 61.6"
- annual precipitation
- 268 days
- frost-free growing season
Grand Coteau: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00163800 · Grand Coteau, LA 68°F mean · 61.6" precip
TEMP-MILD · RANK-WARM · PHOTO-FINISH · PRCP-WET · SWING-NARROW · COMF-MID · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 68°F
- RANK-WARM #6,381
- PHOTO-FINISH ≈ Gulfport - Bilo…
- PRCP-WET 61.6"
- SWING-NARROW 30°F
- COMF-MID 73/100
- LOAD-MIX H/C balanced
- STN-1 USC00163800
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Gulfport - Biloxi, MS (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every LA station list.
- Grand Coteau (this station) 68°F
- Hot Natchitoches, LA 68°F
- Near Gulfport - Bilo…, MS 68°F
- Near High Springs, FL 68°F
- Near Marianna, FL 68°F
Grand Coteau sits in Louisiana, the #3 hottest U.S. state at 67.3°F statewide annual average - see all 50 hottest states ranked by NOAA normals
Climate Living Index · Grand Coteau
Grand Coteau: 73/100 · grade B
Grand Coteau publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Grand Coteau, not an official NOAA rating. Rankings still use Comfort Score 73/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 68.3°F · 0.8° from 67.5°F | 96/100 · A |
| Frost-free season | 268 days/year | 94/100 · A |
| Normal heat + freeze calendar | 88 calendar days | 80/100 · B |
| Precipitation balance | 61.6 in · 26.6 from 35 in | 8/100 · F |
Grand Coteau · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Grand Coteau is a temperate Köppen climate: Cfa
Coldest-month mean 52.5°F and warmest-month mean 82.1°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 82.1°F
- Coldest month
- 52.5°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · balanced station
Where Grand Coteau sits across the climate record
Three NOAA fields for Grand Coteau's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 7% warmest
- Among 6,861 stations, Grand Coteau sits in the warmer third of annual means.
- Annual precipitation
- Top 4% wettest
- Grand Coteau's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 91%
- Warmest-to-coldest month gap for Grand Coteau is compact versus 6,861 complete station-years.
How Grand Coteau compares across U.S. station-mapped locations
Grand Coteau's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
73 Top 34% score exceeds 66% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). This entry sits in this band.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Grand Coteau's measured station temperature trend
MethodologyAcross 87 complete annual observations from 1884 to 2021, GRAND COTEAU warmed at a fitted rate of 0.07°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Grand Coteau primary station fitted change +0.07 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 64°F (18°C) | 41°F (5°C) | 53°F (11°C) | 6.5" | 6.8 | 0.0 |
| February | 67°F (20°C) | 45°F (7°C) | 56°F (13°C) | 4.5" | 3.2 | 0.0 |
| March | 74°F (23°C) | 51°F (10°C) | 62°F (17°C) | 3.8" | 1.0 | 0.0 |
| April | 79°F (26°C) | 57°F (14°C) | 68°F (20°C) | 5.3" | 0.0 | 0.4 |
| May | 86°F (30°C) | 65°F (18°C) | 75°F (24°C) | 5.7" | 0.0 | 6.1 |
| June | 90°F (32°C) | 70°F (21°C) | 80°F (27°C) | 7.0" | 0.0 | 19.6 |
| July | 92°F (33°C) | 73°F (23°C) | 82°F (28°C) | 4.4" | 0.0 | 24.6 |
| August | 92°F (33°C) | 72°F (22°C) | 82°F (28°C) | 4.4" | 0.0 | 25.6 |
| September | 88°F (31°C) | 68°F (20°C) | 78°F (26°C) | 5.1" | 0.0 | 14.8 |
| October | 81°F (27°C) | 58°F (14°C) | 70°F (21°C) | 5.0" | 0.1 | 2.0 |
| November | 71°F (22°C) | 48°F (9°C) | 60°F (16°C) | 5.0" | 1.9 | 0.0 |
| December | 65°F (18°C) | 43°F (6°C) | 54°F (12°C) | 4.9" | 5.1 | 0.0 |
The year, day by day
The year in Grand Coteau runs from a mild 41°F around January 12 to 93°F at the peak near August 3, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 10 through September 5, covering 88 dates. The broader mild season, normal highs of 70°F or more, runs February 28 to November 19.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 41°F around January 12.
Where the wet dates fall
The likeliest wet date is August 31, when 36% of years recorded at least a hundredth of an inch. The driest is April 1 at 23%. Summed across the calendar, that is about 109 wet dates a year.
The widest day
October 25 carries the biggest normal gap between afternoon and dawn, 24°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Grand Coteau.
Where Grand Coteau Stands Nationally
This is one of the wettest normals climates ranked: about 62 inches of precipitation in a normal year, a total fewer than one station in ten surpasses.
Heat is a defining feature of the normals calendar — the normal daily high reaches 90°F on roughly 88 days a year, more than four out of five ranked stations record.
Grand Coteau earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
9.4 days with precipitation
8.1 days with precipitation
7.9 days with precipitation
7.0 days with precipitation
8.4 days with precipitation
10.4 days with precipitation
10.4 days with precipitation
10.2 days with precipitation
10.3 days with precipitation
7.7 days with precipitation
8.8 days with precipitation
10.1 days with precipitation
Grand Coteau spreads its precipitation across the year
Neither half of the year dominates here: June through August take 26% of the annual total and December through February 26%, with neither reaching the 35% that would mark a distinct wet season. Grand Coteau has no dry season to plan around, though it does carry an unusually narrow 29.6°F seasonal spread.
The gap between the wettest and driest month still matters: June averages 7.0" and March 3.8". The three wettest months together take 31% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Grand Coteau, it arrives in quantity
61.6" of precipitation falls across only about 109 wet days here, averaging 0.57 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 109 a year, 30% of all days
- Average depth per wet day
- 0.57 inches
- Most wet days
- June, about 10
- Fewest wet days
- April, about 7
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Frost Dates & Growing Season
First Fall Freeze
November 23
50% probability date
Last Spring Freeze
February 28
50% probability date
Growing Season
268 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,467
Higher = more heating needed
Cooling Degree Days
2,698
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside LA closest to Grand Coteau on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (68°F here).
- High Springs, FL 68°F · 0.0°F off
- Marianna, FL 68°F · 0.0°F off
- Groveton, TX 68°F · 0.1°F off
- Green Valley, AZ 68°F · 0.1°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (61.6" here), excluding temperature-peer places.
- Hazlehurst, MS 61.6" · 0.0" off
- Raleigh, MS 61.6" · 0.0" off
- Frisco, NC 61.6" · 0.1" off
- Liberty, MS 61.7" · 0.1" off
Data-derived climate profile
How Grand Coteau's climate pattern fits together
mixed demand · wet · low swing
Water is prominent even though neither heating nor cooling wholly defines the record. Grand Coteau averages 61.6 inches of precipitation a year. Snowfall is not added to the interpretation because its annual value is missing. The monthly table supplies the seasonal distribution hidden by that annual total.
Grand Coteau's 29.6°F seasonal spread is compact even though precipitation is abundant. July and January mark the typical warm and cold ends of the calendar. The annual average is 68°F. Temperature is relatively steady; the monthly rows show how rain and snow observations vary across the calendar.
Grand Coteau combines a compact 29.6°F annual temperature range with meaningful demand on both sides of the thermostat: 1,467 heating and 2,698 cooling degree days. The balance matters more here than either annual total in isolation.
The frost-free window extends for about 268 days. That is a long calendar measure, but it is not a forecast and does not combine heat, rainfall, soil, or local elevation into a planting recommendation.
These labels group NOAA 1991-2020 normals from Grand Coteau's primary station, where heating and cooling demand are close enough that neither season sets the character on its own. On a balanced station like Grand Coteau, the bands are descriptive ranges rather than an official NOAA classification or a forecast.
Questions about Grand Coteau's climate
How much rain does Grand Coteau get? ▼
How many days above 90°F does Grand Coteau get? ▼
How much energy does heating and cooling require in Grand Coteau? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Grand Coteau's primary station: GRAND COTEAU (USC00163800). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 2230760). Match rule for Grand Coteau: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Grand Coteau comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.