Climate Comfort Score
73/100
Good
NOAA 1991–2020 normals 58°F annual avg Public-domain federal data
- 58°F
- Avg annual temp
- 73/100
- Comfort score
- 58.7"
- Annual precip
- 210d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Dayton
Dayton, Tennessee averages 58°F a year and scores 73/100 on the comfort index - good, milder than 68% of U.S. cities.
- 58°F
- annual average temperature (NOAA normal)
- 73/100
- comfort score, milder than 68% of U.S. cities
- 58.7"
- annual precipitation · 2" snow
- 210 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
58°F (15°C)
Avg High
69°F
Avg Low
48°F
Annual Precip
58.7"
Annual Snow
1.6"
Comfort Score
73/100
Good
Avg Annual Temperature
58°F
30-year mean (NOAA NCEI)
Annual Precipitation
58.7"
Plus 1.6" of snow
Comfort score vs national 100-point ceiling (Dayton) 73.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Dayton area.
How Dayton compares to every U.S. city
Dayton's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
73 Top 32% higher than 68% 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 Dayton
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Dayton'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 | 47°F (9°C) | 28°F (-2°C) | 38°F (3°C) | 5.2" | 0.3" | 19.7 | 0.0 |
| February | 52°F (11°C) | 31°F (0°C) | 42°F (5°C) | 5.1" | 0.6" | 14.7 | 0.0 |
| March | 61°F (16°C) | 38°F (3°C) | 49°F (10°C) | 5.3" | 0.4" | 8.6 | 0.0 |
| April | 71°F (21°C) | 46°F (8°C) | 58°F (15°C) | 5.4" | 0.0" | 1.4 | 0.1 |
| May | 78°F (26°C) | 55°F (13°C) | 67°F (19°C) | 4.8" | 0.0" | 0.0 | 0.4 |
| June | 85°F (29°C) | 63°F (17°C) | 74°F (23°C) | 4.5" | 0.0" | 0.0 | 5.7 |
| July | 88°F (31°C) | 67°F (19°C) | 77°F (25°C) | 5.3" | 0.0" | 0.0 | 12.0 |
| August | 87°F (31°C) | 66°F (19°C) | 77°F (25°C) | 3.9" | 0.0" | 0.0 | 10.7 |
| September | 82°F (28°C) | 60°F (15°C) | 71°F (22°C) | 4.8" | 0.0" | 0.0 | 4.0 |
| October | 71°F (22°C) | 48°F (9°C) | 59°F (15°C) | 3.6" | 0.0" | 1.2 | 0.2 |
| November | 59°F (15°C) | 37°F (3°C) | 48°F (9°C) | 4.8" | 0.0" | 9.1 | 0.0 |
| December | 50°F (10°C) | 31°F (0°C) | 41°F (5°C) | 6.0" | 0.3" | 17.7 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 5.2"
Snow: 0.3"
10.9 days with precipitation
February 5.1"
Snow: 0.6"
10.6 days with precipitation
March 5.3"
Snow: 0.4"
11.4 days with precipitation
April 5.4"
10.4 days with precipitation
May 4.8"
11.1 days with precipitation
June 4.5"
11.7 days with precipitation
July 5.3"
13.2 days with precipitation
August 3.9"
10.9 days with precipitation
September 4.8"
9.1 days with precipitation
October 3.6"
8.4 days with precipitation
November 4.8"
8.7 days with precipitation
December 6.0"
Snow: 0.3"
11.3 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 31
50% probability date
Last Spring Freeze
April 4
50% probability date
Growing Season
210 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,762
Higher = more heating needed
Cooling Degree Days
1,385
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Dayton's climate means for you
Dayton runs 58°F a year - peaking in July, coldest in January.
- Gardeners get about 210 frost-free days, with the last spring freeze near April 4 - plan the planting calendar around it, not the regional average.
- Energy bills track 3,762 heating and 1,385 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: Dayton, TN
In Dayton, Tennessee, the NOAA 1991–2020 climate normals put the annual average temperature at 58°F, ranging from a mean daily high of 69°F to a mean daily low of 48°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00402360, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Dayton sees about 58.7 inches of precipitation a year, with 1.6 inches typically falling as snow. The frost-free season averages 210 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 4 and the first fall freeze near October 31. On the energy side, 3,762 heating degree days and 1,385 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Dayton scores 73/100 (Good), 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 Dayton, TN? ▼
The average annual temperature in Dayton, Tennessee is 58°F. The warmest month averages 88°F (31°C) and the coldest averages 28°F (-2°C).
How much rain does Dayton get? ▼
Dayton receives 58.7 inches of precipitation annually, including 1.6 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Dayton? ▼
Dayton has a climate comfort score of 73/100 (Good), milder than 68% of U.S. cities in the PlainClimate database.
When is the growing season in Dayton? ▼
Dayton has approximately 210 frost-free days per year, with the last spring freeze around April 4 and the first fall freeze around October 31.
How much energy does heating and cooling require in Dayton? ▼
Dayton has 3,762 heating degree days and 1,385 cooling degree days annually, a heating-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 Dayton climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00402360 near Dayton.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00402360. 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.