Climate Comfort Score
75/100
Good
NOAA 1991–2020 normals 68°F annual avg Public-domain federal data
Marrero, LA Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 68°F
- Avg annual temp
- 75/100
- Comfort score
- 66.1"
- Annual precip
- 305d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Marrero
Marrero, Louisiana averages 68°F a year and scores 75/100 on the comfort index - good, milder than 72% of U.S. cities.
- 68°F
- average temperature, NOAA 1991-2020 normal
- 75/100
- comfort score, milder than 72% of U.S. cities
- 66.1"
- precipitation, annual total
- 305 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
68°F (20°C)
Avg High
77°F
Avg Low
59°F
Annual Precip
66.1"
Comfort Score
75/100
Good
Avg Annual Temperature
68°F
30-year mean (NOAA NCEI)
Annual Precipitation
66.1"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Marrero) 75.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Marrero area.
How Marrero compares to every U.S. city
Marrero's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
75 Top 28% higher than 72% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Marrero
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Marrero captures average conditions across the spread shown, the most recent decade is warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
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) | 43°F (6°C) | 53°F (11°C) | 5.3" | 5.8 | 0.0 |
| February | 66°F (19°C) | 47°F (8°C) | 56°F (14°C) | 4.2" | 1.6 | 0.0 |
| March | 72°F (22°C) | 53°F (11°C) | 62°F (17°C) | 5.2" | 0.7 | 0.1 |
| April | 78°F (25°C) | 58°F (15°C) | 68°F (20°C) | 5.3" | 0.0 | 0.0 |
| May | 84°F (29°C) | 66°F (19°C) | 75°F (24°C) | 5.5" | 0.0 | 4.9 |
| June | 89°F (31°C) | 72°F (22°C) | 80°F (27°C) | 7.2" | 0.0 | 17.8 |
| July | 90°F (32°C) | 74°F (23°C) | 82°F (28°C) | 7.5" | 0.0 | 22.5 |
| August | 90°F (32°C) | 74°F (23°C) | 82°F (28°C) | 6.9" | 0.0 | 21.6 |
| September | 87°F (30°C) | 70°F (21°C) | 78°F (26°C) | 6.3" | 0.0 | 11.2 |
| October | 79°F (26°C) | 61°F (16°C) | 70°F (21°C) | 3.8" | 0.0 | 1.0 |
| November | 70°F (21°C) | 51°F (10°C) | 60°F (16°C) | 3.8" | 0.5 | 0.0 |
| December | 64°F (18°C) | 46°F (8°C) | 55°F (13°C) | 5.1" | 2.6 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 5.3"
February 4.2"
March 5.2"
April 5.3"
May 5.5"
June 7.2"
July 7.5"
August 6.9"
September 6.3"
October 3.8"
November 3.8"
December 5.1"
Frost Dates & Growing Season
First Fall Freeze
December 12
50% probability date
Last Spring Freeze
February 10
50% probability date
Growing Season
305 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,407
Higher = more heating needed
Cooling Degree Days
2,673
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Marrero's climate means for you
Marrero runs 68°F a year - peaking in July, coldest in January.
- Gardeners get about 305 frost-free days, with the last spring freeze near February 10 - plan the planting calendar around it, not the regional average.
- Energy bills track 1,407 heating and 2,673 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Marrero, LA
Based on station USC00165926 feeding NOAA's 1991–2020 climate normals, Marrero, Louisiana averages 68°F a year, ranging from a mean daily high of 77°F to a mean daily low of 59°F. July is typically the warmest month of the year, while January is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Marrero sees about 66.1 inches of precipitation a year, predominantly as rainfall. The frost-free season averages 305 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near February 10 and the first fall freeze near December 12. On the energy side, 1,407 heating degree days and 2,673 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Marrero scores 75/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, July-driven heat peaks in summer, and January-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in Marrero, LA? ▼
The average annual temperature in Marrero, Louisiana is 68°F. The warmest month averages 90°F (32°C) and the coldest averages 43°F (6°C).
How much rain does Marrero get? ▼
Marrero receives 66.1 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Marrero? ▼
Marrero has a climate comfort score of 75/100 (Good), milder than 72% of U.S. cities in the PlainClimate database.
When is the growing season in Marrero? ▼
Marrero has approximately 305 frost-free days per year, with the last spring freeze around February 10 and the first fall freeze around December 12.
How much energy does heating and cooling require in Marrero? ▼
Marrero has 1,407 heating degree days and 2,673 cooling degree days annually, a fairly balanced heating/cooling split. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Marrero climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00165926 near Marrero.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00165926. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.