Climate Comfort Score
78/100
Good
NOAA 1991–2020 normals 55°F annual avg Public-domain federal data
- 55°F
- Avg annual temp
- 78/100
- Comfort score
- 47.0"
- Annual precip
- 185d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Erwin
Erwin, Tennessee averages 55°F a year and scores 78/100 on the comfort index - good, milder than 74% of U.S. cities.
- 55°F
- yearly average temperature, NOAA normal
- 78/100
- comfort score, milder than 74% of U.S. cities
- 47.0"
- annual precipitation · 9" snow
- 185 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
55°F (13°C)
Avg High
68°F
Avg Low
43°F
Annual Precip
47.0"
Annual Snow
9.3"
Comfort Score
78/100
Good
Avg Annual Temperature
55°F
30-year mean (NOAA NCEI)
Annual Precipitation
47.0"
Plus 9.3" of snow
Comfort score vs national 100-point ceiling (Erwin) 78.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Erwin area.
How Erwin compares to every U.S. city
Erwin's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
78 Top 26% higher than 74% 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 Erwin
MethodologyZooming out from Erwin'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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 47°F (8°C) | 25°F (-4°C) | 36°F (2°C) | 3.5" | 3.4" | 22.3 | 0.0 |
| February | 51°F (10°C) | 27°F (-3°C) | 39°F (4°C) | 3.3" | 2.5" | 19.2 | 0.0 |
| March | 59°F (15°C) | 33°F (1°C) | 46°F (8°C) | 3.8" | 0.9" | 14.1 | 0.0 |
| April | 68°F (20°C) | 41°F (5°C) | 55°F (13°C) | 4.0" | 0.0" | 4.3 | 0.0 |
| May | 76°F (25°C) | 50°F (10°C) | 63°F (17°C) | 4.8" | 0.0" | 0.5 | 0.2 |
| June | 83°F (28°C) | 58°F (15°C) | 71°F (21°C) | 5.1" | 0.0" | 0.0 | 3.1 |
| July | 85°F (30°C) | 62°F (17°C) | 74°F (23°C) | 5.5" | 0.0" | 0.0 | 6.1 |
| August | 85°F (29°C) | 61°F (16°C) | 73°F (23°C) | 4.8" | 0.0" | 0.0 | 5.5 |
| September | 80°F (27°C) | 55°F (13°C) | 68°F (20°C) | 3.3" | 0.0" | 0.0 | 2.5 |
| October | 70°F (21°C) | 43°F (6°C) | 57°F (14°C) | 2.5" | 0.0" | 2.9 | 0.1 |
| November | 59°F (15°C) | 33°F (0°C) | 46°F (8°C) | 2.8" | 0.1" | 15.1 | 0.0 |
| December | 50°F (10°C) | 28°F (-2°C) | 39°F (4°C) | 3.6" | 2.4" | 19.9 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 3.5"
Snow: 3.4"
12.0 days with precipitation
February 3.3"
Snow: 2.5"
11.0 days with precipitation
March 3.8"
Snow: 0.9"
11.9 days with precipitation
April 4.0"
10.9 days with precipitation
May 4.8"
13.4 days with precipitation
June 5.1"
13.3 days with precipitation
July 5.5"
13.8 days with precipitation
August 4.8"
12.3 days with precipitation
September 3.3"
9.6 days with precipitation
October 2.5"
8.4 days with precipitation
November 2.8"
Snow: 0.1"
9.3 days with precipitation
December 3.6"
Snow: 2.4"
11.6 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 23
50% probability date
Last Spring Freeze
April 21
50% probability date
Growing Season
185 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,390
Higher = more heating needed
Cooling Degree Days
908
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Erwin's climate means for you
Erwin runs 55°F a year - peaking in July, coldest in January.
- Gardeners get about 185 frost-free days, with the last spring freeze near April 21 - plan the planting calendar around it, not the regional average.
- Energy bills track 4,390 heating and 908 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: Erwin, TN
Erwin, Tennessee runs an annual average of 55°F, ranging from a mean daily high of 68°F to a mean daily low of 43°F, per NOAA's 1991–2020 climate normals. July is typically the warmest month of the year, while January is the coldest. Drawn from station USC00402934, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.
Erwin averages 47.0 inches of precipitation a year, with 9.3 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 185 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 21 and the first fall freeze near October 23. As for energy demand, 4,390 heating degree days and 908 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Erwin scores 78/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings July-driven heat, and deep winter brings January-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Erwin, TN? ▼
The average annual temperature in Erwin, Tennessee is 55°F. The warmest month averages 85°F (30°C) and the coldest averages 25°F (-4°C).
How much rain does Erwin get? ▼
Erwin receives 47.0 inches of precipitation annually, including 9.3 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Erwin? ▼
Erwin has a climate comfort score of 78/100 (Good), milder than 74% of U.S. cities in the PlainClimate database.
When is the growing season in Erwin? ▼
Erwin has approximately 185 frost-free days per year, with the last spring freeze around April 21 and the first fall freeze around October 23.
How much energy does heating and cooling require in Erwin? ▼
Erwin has 4,390 heating degree days and 908 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 Erwin climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00402934 near Erwin.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00402934. 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.