Climate Comfort Score
83/100
Excellent
NOAA 1991–2020 normals 60°F annual avg Public-domain federal data
Mammoth Cave, KY Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 60°F
- Avg annual temp
- 83/100
- Comfort score
- 53.5"
- Annual precip
- 204d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Mammoth Cave
Mammoth Cave, Kentucky averages 60°F a year and scores 83/100 on the comfort index - excellent, milder than 85% of U.S. cities.
- 60°F
- annual average temperature (NOAA normal)
- 83/100
- comfort score, milder than 85% of U.S. cities
- 53.5"
- annual precipitation · 4" snow
- 204 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
60°F (16°C)
Avg High
72°F
Avg Low
49°F
Annual Precip
53.5"
Annual Snow
4.0"
Comfort Score
83/100
Excellent
Avg Annual Temperature
60°F
30-year mean (NOAA NCEI)
Annual Precipitation
53.5"
Plus 4.0" of snow
Comfort score vs national 100-point ceiling (Mammoth Cave) 83.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the Mammoth Cave area.
How Mammoth Cave compares to every U.S. city
Mammoth Cave's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
83 Top 15% higher than 85% 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 Mammoth Cave
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Mammoth Cave's current NOAA 1991-2020 normal sits within that longer spread, and the most recent decade runs 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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 48°F (9°C) | 29°F (-1°C) | 39°F (4°C) | 3.7" | 0.7" | 20.4 | 0.0 |
| February | 53°F (12°C) | 32°F (0°C) | 43°F (6°C) | 4.5" | 1.4" | 16.0 | 0.0 |
| March | 62°F (17°C) | 40°F (4°C) | 51°F (11°C) | 5.0" | 0.6" | 10.6 | 0.0 |
| April | 73°F (23°C) | 48°F (9°C) | 61°F (16°C) | 4.9" | 0.0" | 2.5 | 0.1 |
| May | 81°F (27°C) | 57°F (14°C) | 69°F (21°C) | 5.2" | 0.0" | 0.1 | 2.6 |
| June | 88°F (31°C) | 64°F (18°C) | 76°F (25°C) | 4.8" | 0.0" | 0.0 | 11.0 |
| July | 91°F (33°C) | 68°F (20°C) | 80°F (26°C) | 4.9" | 0.0" | 0.0 | 17.5 |
| August | 90°F (32°C) | 67°F (19°C) | 79°F (26°C) | 3.8" | 0.0" | 0.0 | 14.8 |
| September | 85°F (29°C) | 60°F (16°C) | 73°F (23°C) | 4.0" | 0.0" | 0.0 | 7.2 |
| October | 74°F (23°C) | 49°F (10°C) | 62°F (16°C) | 3.8" | 0.0" | 1.8 | 0.5 |
| November | 61°F (16°C) | 40°F (4°C) | 51°F (10°C) | 4.1" | 0.0" | 9.1 | 0.0 |
| December | 51°F (11°C) | 33°F (1°C) | 42°F (6°C) | 4.8" | 1.3" | 17.3 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 3.7"
Snow: 0.7"
11.5 days with precipitation
February 4.5"
Snow: 1.4"
10.8 days with precipitation
March 5.0"
Snow: 0.6"
12.9 days with precipitation
April 4.9"
11.9 days with precipitation
May 5.2"
12.1 days with precipitation
June 4.8"
11.9 days with precipitation
July 4.9"
10.7 days with precipitation
August 3.8"
9.1 days with precipitation
September 4.0"
7.9 days with precipitation
October 3.8"
9.0 days with precipitation
November 4.1"
9.5 days with precipitation
December 4.8"
Snow: 1.3"
11.5 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 30
50% probability date
Last Spring Freeze
April 9
50% probability date
Growing Season
204 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,482
Higher = more heating needed
Cooling Degree Days
1,773
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Mammoth Cave's climate means for you
Mammoth Cave runs 60°F a year - peaking in July, coldest in January.
- Gardeners get about 204 frost-free days, with the last spring freeze near April 9 - plan the planting calendar around it, not the regional average.
- Energy bills track 3,482 heating and 1,773 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: Mammoth Cave, KY
The NOAA 1991–2020 climate normals describe Mammoth Cave, Kentucky as a location with an annual average temperature of 60°F, ranging from a mean daily high of 72°F to a mean daily low of 49°F. July is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00155097, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Mammoth Cave receives roughly 53.5 inches of precipitation each year, with 4.0 inches typically falling as snow. The frost-free season averages 204 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 9 and the first fall freeze near October 30. For energy use, 3,482 heating degree days and 1,773 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Mammoth Cave scores 83/100 (Excellent), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows, shoulder seasons for mild highs and lows, peak summer for July-driven heat, or deep winter for January-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.
Frequently Asked Questions
What is the average temperature in Mammoth Cave, KY? ▼
The average annual temperature in Mammoth Cave, Kentucky is 60°F. The warmest month averages 91°F (33°C) and the coldest averages 29°F (-1°C).
How much rain does Mammoth Cave get? ▼
Mammoth Cave receives 53.5 inches of precipitation annually, including 4.0 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Mammoth Cave? ▼
Mammoth Cave has a climate comfort score of 83/100 (Excellent), milder than 85% of U.S. cities in the PlainClimate database.
When is the growing season in Mammoth Cave? ▼
Mammoth Cave has approximately 204 frost-free days per year, with the last spring freeze around April 9 and the first fall freeze around October 30.
How much energy does heating and cooling require in Mammoth Cave? ▼
Mammoth Cave has 3,482 heating degree days and 1,773 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 Mammoth Cave climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00155097 near Mammoth Cave.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00155097. 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.