Climate Comfort Score
77/100
Good
NOAA 1991–2020 normals 79°F annual avg Public-domain federal data
Marathon, FL Climate
Explore average temperature, rainfall, and comfort score sourced from NOAA NCEI's 1991–2020 climate normals →
- 79°F
- Avg annual temp
- 77/100
- Comfort score
- 39.7"
- Annual precip
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Marathon
Marathon, Florida averages 79°F a year and scores 77/100 on the comfort index - good, milder than 72% of U.S. cities.
- 79°F
- yearly average temperature, NOAA normal
- 77/100
- comfort score, milder than 72% of U.S. cities
- 39.7"
- annual precipitation
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
79°F (26°C)
Avg High
85°F
Avg Low
73°F
Annual Precip
39.7"
Comfort Score
77/100
Good
Avg Annual Temperature
79°F
30-year mean (NOAA NCEI)
Annual Precipitation
39.7"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Marathon) 77.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Marathon area.
How Marathon compares to every U.S. city
Marathon's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
77 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 Marathon
MethodologyZooming out from Marathon's own normal, the chart below shows how the U.S. land temperature anomaly has tracked the global mean since 1900 - the most recent decade sits warmer than the 30-year mean shown here.
- 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 | 76°F (24°C) | 64°F (18°C) | 70°F (21°C) | 1.6" | 0.0 | 0.0 |
| February | 78°F (26°C) | 66°F (19°C) | 72°F (22°C) | 1.7" | 0.0 | 0.0 |
| March | 81°F (27°C) | 69°F (20°C) | 75°F (24°C) | 1.3" | 0.0 | 0.0 |
| April | 84°F (29°C) | 73°F (23°C) | 78°F (26°C) | 2.1" | 0.0 | 1.9 |
| May | 88°F (31°C) | 76°F (24°C) | 82°F (28°C) | 3.4" | 0.0 | 7.4 |
| June | 90°F (32°C) | 79°F (26°C) | 84°F (29°C) | 4.2" | 0.0 | 19.0 |
| July | 91°F (33°C) | 79°F (26°C) | 85°F (30°C) | 3.8" | 0.0 | 25.5 |
| August | 92°F (33°C) | 80°F (27°C) | 86°F (30°C) | 5.3" | 0.0 | 27.4 |
| September | 90°F (32°C) | 78°F (26°C) | 84°F (29°C) | 6.4" | 0.0 | 19.0 |
| October | 86°F (30°C) | 76°F (24°C) | 81°F (27°C) | 5.9" | 0.0 | 4.6 |
| November | 81°F (27°C) | 71°F (22°C) | 76°F (24°C) | 1.8" | 0.0 | 0.0 |
| December | 78°F (26°C) | 68°F (20°C) | 73°F (23°C) | 2.2" | 0.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.6"
7.9 days with precipitation
February 1.7"
6.0 days with precipitation
March 1.3"
5.8 days with precipitation
April 2.1"
5.0 days with precipitation
May 3.4"
7.9 days with precipitation
June 4.2"
10.4 days with precipitation
July 3.8"
12.5 days with precipitation
August 5.3"
14.3 days with precipitation
September 6.4"
15.1 days with precipitation
October 5.9"
11.7 days with precipitation
November 1.8"
7.1 days with precipitation
December 2.2"
8.3 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
N/A
50% probability date
Last Spring Freeze
N/A
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
71
Higher = more heating needed
Cooling Degree Days
5,128
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
What Marathon's climate means for you
Marathon runs 79°F a year - peaking in August, coldest in January.
- Energy bills track 71 heating and 5,128 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: Marathon, FL
The NOAA 1991–2020 climate normals describe Marathon, Florida as a location with an annual average temperature of 79°F, ranging from a mean daily high of 85°F to a mean daily low of 73°F. August is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USW00012896, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Marathon sees about 39.7 inches of precipitation a year, predominantly as rainfall. Growing-season length varies with elevation and microclimate. On the energy side, 71 heating degree days and 5,128 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Marathon scores 77/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings August-driven heat, and winter brings January-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in Marathon, FL? ▼
The average annual temperature in Marathon, Florida is 79°F. The warmest month averages 92°F (33°C) and the coldest averages 64°F (18°C).
How much rain does Marathon get? ▼
Marathon receives 39.7 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Marathon? ▼
Marathon has a climate comfort score of 77/100 (Good), milder than 72% of U.S. cities in the PlainClimate database.
When is the growing season in Marathon? ▼
Growing season data is not available for Marathon.
How much energy does heating and cooling require in Marathon? ▼
Marathon has 71 heating degree days and 5,128 cooling degree days annually, a cooling-dominated climate. 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 Marathon climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00012896 near Marathon.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00012896. 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.