Jamestown, TN Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Jamestown's primary NOAA station, JAMESTOWN.
The climate verdict for Jamestown
Water is the standout signal in Jamestown, Tennessee: 59.2 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 55°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 55°F
- annual average temperature (NOAA normal)
- 68/100
- comfort score, above 56% of station-mapped location scores
- 59.2"
- annual precipitation · 19" snow
- 185 days
- growing season, frost-free days
Jamestown: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00404590 · Jamestown, TN 55°F mean · 59.2" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-WET · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 55°F
- RANK-UPPER #4,185
- PHOTO-FINISH ≈ Lynchburg
- PRCP-WET 59.2"
- SWING-MID 39°F
- COMF-MID 68/100
- LOAD-HEAT 4,486 HDD
- STN-1 USC00404590
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Lynchburg, VA (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every TN station list.
- Jamestown (this station) 55°F
- Cold Oneida, TN 55°F
- Hot Manchester, KY 55°F
- Near Lynchburg, VA 55°F
- Near Twin Arrows, AZ 55°F
Climate Living Index · Jamestown
Jamestown: 54/100 · grade D
Jamestown publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Jamestown, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 104 calendar days | 74/100 · B |
| Annual temperature balance | 55.2°F · 12.3° from 67.5°F | 60/100 · C |
| Frost-free season | 185 days/year | 54/100 · D |
| Snowfall burden | 18.9 inches/year | 50/100 · D |
| Precipitation balance | 59.2 in · 24.2 from 35 in | 15/100 · F |
Jamestown · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Jamestown is a temperate Köppen climate: Cfa
Coldest-month mean 34.7°F and warmest-month mean 74.1°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 74.1°F
- Coldest month
- 34.7°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Jamestown sits across the climate record
Three NOAA fields for Jamestown's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 61st percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 6% wettest
- Jamestown's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 33rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Jamestown compares across U.S. station-mapped locations
Jamestown's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 45°F (7°C) | 25°F (-4°C) | 35°F (2°C) | 5.0" | 3.2" | 23.0 | 0.0 |
| February | 49°F (9°C) | 27°F (-3°C) | 38°F (3°C) | 4.9" | 5.7" | 20.6 | 0.0 |
| March | 58°F (14°C) | 34°F (1°C) | 46°F (8°C) | 5.5" | 4.8" | 14.5 | 0.0 |
| April | 68°F (20°C) | 42°F (6°C) | 55°F (13°C) | 5.5" | 0.1" | 5.2 | 0.0 |
| May | 75°F (24°C) | 53°F (11°C) | 64°F (18°C) | 5.3" | 0.0" | 0.5 | 0.0 |
| June | 82°F (28°C) | 60°F (16°C) | 71°F (22°C) | 5.5" | 0.0" | 0.0 | 1.2 |
| July | 84°F (29°C) | 64°F (18°C) | 74°F (23°C) | 5.3" | 0.0" | 0.0 | 3.2 |
| August | 84°F (29°C) | 63°F (17°C) | 74°F (23°C) | 4.6" | 0.0" | 0.0 | 3.2 |
| September | 78°F (26°C) | 56°F (13°C) | 67°F (19°C) | 4.0" | 0.0" | 0.0 | 0.9 |
| October | 69°F (20°C) | 44°F (7°C) | 56°F (13°C) | 3.2" | 0.0" | 3.8 | 0.2 |
| November | 57°F (14°C) | 34°F (1°C) | 46°F (8°C) | 4.1" | 0.3" | 14.7 | 0.0 |
| December | 48°F (9°C) | 28°F (-2°C) | 38°F (3°C) | 6.3" | 4.8" | 20.8 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 85°F around August 1, short of 90°F on every date, while 104 dates carry a normal low at or below freezing, the coldest 24°F near January 23.
The freezing stretch
The normal low stays at or below 32°F into March 6, then returns to freezing around November 24, covering 104 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is January 1, when 46% of years recorded at least a hundredth of an inch. The driest is September 9 at 29%. Summed across the calendar, that is about 141 wet dates a year.
The widest day
April 6 carries the biggest normal gap between afternoon and dawn, 26°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Jamestown.
Where Jamestown Stands Nationally
This is one of the wettest normals climates ranked: about 59 inches of precipitation in a normal year, a total fewer than one station in ten surpasses.
Jamestown earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 3.2"
13.8 days with precipitation
Snow: 5.7"
12.7 days with precipitation
Snow: 4.8"
13.3 days with precipitation
Snow: 0.1"
12.2 days with precipitation
12.7 days with precipitation
12.4 days with precipitation
11.6 days with precipitation
9.8 days with precipitation
9.0 days with precipitation
8.9 days with precipitation
Snow: 0.3"
10.3 days with precipitation
Snow: 4.8"
13.7 days with precipitation
Jamestown spreads its precipitation across the year
Neither half of the year dominates here: June through August take 26% of the annual total and December through February 27%, with neither reaching the 35% that would mark a distinct wet season. Jamestown has no dry season to plan around, though it does carry a 39.4°F seasonal spread.
The gap between the wettest and driest month still matters: December averages 6.3" and October 3.2". The three wettest months together take 29% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Jamestown, it arrives in quantity
59.2" of precipitation falls across only about 140 wet days here, averaging 0.42 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 140 a year, 38% of all days
- Average depth per wet day
- 0.42 inches
- Most wet days
- January, about 14
- Fewest wet days
- October, about 9
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Winter brings real snow to Jamestown
Jamestown averages 18.9 inches of snowfall a year, with February the snowiest month on the normals, spread across roughly 12 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 18.9 inches of depth.
- Days recording measurable snow: about 12 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 3% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
October 22
50% probability date
Last Spring Freeze
April 20
50% probability date
Growing Season
185 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,486
Higher = more heating needed
Cooling Degree Days
960
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TN closest to Jamestown on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (55°F here).
- Augusta, KY 55°F · 0.0°F off
- Ava, MO 55°F · 0.0°F off
- Brandenburg, KY 55°F · 0.0°F off
- Brevard, NC 55°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (59.2" here), excluding temperature-peer places.
- Olive Branch, MS 59.2" · 0.0" off
- Boone, NC 59.1" · 0.0" off
- Warren, AR 59.1" · 0.1" off
- Murphy, NC 59.3" · 0.1" off
Snow and freeze rhythm
When cold and snow define Jamestown
heating led · wet · mid swing
Jamestown's energy balance leans toward cold weather: 4,486 annual heating degree days against 960 for cooling. Its 39.4°F seasonal range still makes the monthly rows more useful than the annual average alone.
Jamestown's frost-free season lasts about 185 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Jamestown coldest normal
January
The monthly mean of 35°F (2°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Jamestown typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Jamestown snow peak
February
Jamestown averages 18.9 inches of snow a year, with February the snowiest month on the normals.
Questions about Jamestown's climate
How much snow does Jamestown get? ▼
How cold does Jamestown get in winter? ▼
How much energy does heating and cooling require in Jamestown? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Jamestown's primary station: JAMESTOWN (USC00404590). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 4737780). Match rule for Jamestown: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Jamestown comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.