Chalmette, LA Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Chalmette's primary NOAA station, CHALMETTE.
The climate verdict for Chalmette
Warm-season cooling demand defines Chalmette, Louisiana, running at more than twice its heating total. The NOAA normal records an annual average of 70°F. It scores 76/100 for climate comfort (good), putting it in the top third of station-mapped location scores and exceeding 69% of them.
- 70°F
- yearly average temperature, NOAA normal
- 76/100
- comfort score, above 69% of station-mapped location scores
- 70.4"
- precipitation, annual total
- 310 days
- frost-free growing season
Chalmette: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00166130 · Chalmette, LA 70°F mean · 70.4" precip
TEMP-MILD · RANK-WARM · PHOTO-FINISH · PRCP-WET · SWING-MID · COMF-TOP · LOAD-COOL · STN-1 · BOOK-FULL
- TEMP-MILD 70°F
- RANK-WARM #6,518
- PHOTO-FINISH ≈ Victoria Fire D…
- PRCP-WET 70.4"
- SWING-MID 32°F
- COMF-TOP 76/100
- LOAD-COOL 3,111 CDD
- STN-1 USC00166130
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Victoria Fire Dept, TX (+ 0.1 °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.
- Chalmette (this station) 70°F
- Cold Lake Charles, LA 70°F
- Hot San Antonio Kel…, TX 70°F
- Near Victoria Fire D…, TX 70°F
- Near Danevang, TX 70°F
Chalmette 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 · Chalmette
Chalmette: 70/100 · grade B
Chalmette publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Chalmette, not an official NOAA rating. Rankings still use Comfort Score 76/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 310 days/year | 100/100 · A |
| Annual temperature balance | 69.9°F · 2.4° from 67.5°F | 92/100 · A |
| Normal heat + freeze calendar | 97 calendar days | 77/100 · B |
| Precipitation balance | 70.4 in · 35.4 from 35 in | 0/100 · F |
Chalmette · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Chalmette is a temperate Köppen climate: Cfa
Coldest-month mean 52.7°F and warmest-month mean 84.2°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
- 84.2°F
- Coldest month
- 52.7°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 · cooling-led station
Where Chalmette sits across the climate record
Three NOAA fields for Chalmette's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 5% warmest
- Among 6,861 stations, Chalmette sits in the warmer third of annual means.
- Annual precipitation
- Top 2% wettest
- Chalmette's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 88%
- Warmest-to-coldest month gap for Chalmette is compact versus 6,861 complete station-years.
How Chalmette compares across U.S. station-mapped locations
Chalmette's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
76 Top 31% score exceeds 69% 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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 62°F (17°C) | 44°F (6°C) | 53°F (12°C) | 5.8" | 4.7 | 0.0 |
| February | 66°F (19°C) | 47°F (8°C) | 56°F (13°C) | 4.6" | 0.0 | 0.0 |
| March | 73°F (23°C) | 53°F (11°C) | 63°F (17°C) | 4.9" | 0.0 | 0.0 |
| April | 79°F (26°C) | 60°F (16°C) | 70°F (21°C) | 5.3" | 0.0 | 0.0 |
| May | 87°F (30°C) | 68°F (20°C) | 77°F (25°C) | 6.3" | 0.0 | 15.7 |
| June | 91°F (33°C) | 74°F (24°C) | 83°F (28°C) | 8.0" | 0.0 | 24.3 |
| July | 92°F (33°C) | 76°F (24°C) | 84°F (29°C) | 9.0" | 0.0 | 26.3 |
| August | 92°F (33°C) | 76°F (25°C) | 84°F (29°C) | 7.4" | 0.0 | 27.0 |
| September | 88°F (31°C) | 73°F (23°C) | 81°F (27°C) | 5.2" | 0.0 | 20.3 |
| October | 81°F (27°C) | 64°F (18°C) | 73°F (23°C) | 4.7" | 0.0 | 5.2 |
| November | 72°F (22°C) | 52°F (11°C) | 62°F (17°C) | 4.3" | 0.5 | 0.0 |
| December | 65°F (18°C) | 46°F (8°C) | 55°F (13°C) | 4.9" | 1.0 | 0.0 |
The year, day by day
The year in Chalmette runs from a mild 43°F around January 14 to 93°F at the peak near August 1, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from May 31 through September 4, covering 97 dates. The broader mild season, normal highs of 70°F or more, runs March 6 to November 21.
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 43°F around January 14.
The widest day
March 18 carries the biggest normal gap between afternoon and dawn, 20°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Chalmette.
Where Chalmette Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 97 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
This is one of the wettest normals climates ranked: about 70 inches of precipitation in a normal year, a total fewer than one station in ten surpasses.
Chalmette earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
Chalmette spreads its precipitation across the year
Neither half of the year dominates here: June through August take 35% of the annual total and December through February 22%, with neither reaching the 35% that would mark a distinct wet season. Chalmette has no dry season to plan around, though it does carry a 31.5°F seasonal spread.
The gap between the wettest and driest month still matters: July averages 9.0" and November 4.3". The three wettest months together take 35% 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.
Frost Dates & Growing Season
First Fall Freeze
December 17
50% probability date
Last Spring Freeze
February 10
50% probability date
Growing Season
310 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,289
Higher = more heating needed
Cooling Degree Days
3,111
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside LA closest to Chalmette 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 (70°F here).
- Fernandina Beach, FL 70°F · 0.1°F off
- Inverness, FL 70°F · 0.1°F off
- Lisbon, FL 70°F · 0.2°F off
- Conroe, TX 70°F · 0.2°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (70.4" here), excluding temperature-peer places.
- Langlois, OR 70.3" · 0.0" off
- Pascagoula, MS 70.4" · 0.1" off
- Astoria, OR 70.3" · 0.1" off
- Seward, AK 69.7" · 0.7" off
Data-derived climate profile
How Chalmette's climate pattern fits together
cooling led · wet · mid swing
Air-conditioning demand is the clearest thermal signal here. Chalmette accumulates 3,111 cooling degree days, more than twice its 1,289 heating total; the monthly table shows when that imbalance builds rather than treating it as a year-round condition.
Warm-season demand is paired with a wet annual normal: 70.4 inches of precipitation at Chalmette. Snowfall is not added to the interpretation because its annual value is missing. The month-by-month bars distinguish a concentrated wet season from moisture spread across the calendar.
August and January mark the typical warm and cold ends of the calendar in Chalmette's middle-range seasonal profile. The measured spread is 31.5°F. The annual average is 70°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
The frost-free window extends for about 310 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 Chalmette's primary station, so the summer figures are a thirty-year average rather than a ceiling: individual years have run hotter and will again. For Chalmette that means a descriptive range only — not an official NOAA classification and not a prediction for next summer.
Questions about Chalmette's climate
How much rain does Chalmette get? ▼
How many days above 90°F does Chalmette get? ▼
How much energy does heating and cooling require in Chalmette? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Chalmette's primary station: CHALMETTE (USC00166130). 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 a census-designated place (GEOID 2214135), not an incorporated municipality. Match rule for Chalmette: 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 Chalmette 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.