Brentwood, 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 Brentwood's primary NOAA station, BRENTWOOD.
The climate verdict for Brentwood
Water is the standout signal in Brentwood, Tennessee: 54.4 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 58°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 58°F
- average temperature, NOAA 1991-2020 normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 54.4"
- annual precipitation
- 194 days
- frost-free growing season
Brentwood: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00401039 · Brentwood, TN 58°F mean · 54.4" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-WET · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 58°F
- RANK-UPPER #4,734
- PHOTO-FINISH ≈ Smyrna
- PRCP-WET 54.4"
- SWING-MID 41°F
- COMF-MID 68/100
- LOAD-HEAT 3,983 HDD
- STN-1 USC00401039
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Smyrna, TN (+ 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.
- Brentwood (this station) 58°F
- Cold Samburg Wildlif…, TN 58°F
- Hot Paris, TN 58°F
- Near Smyrna, TN 58°F
- Near Ashland Hanover…, VA 58°F
Climate Living Index · Brentwood
Brentwood: 62/100 · grade C
Brentwood publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Brentwood, 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 | 106 calendar days | 73/100 · B |
| Annual temperature balance | 57.9°F · 9.6° from 67.5°F | 69/100 · C |
| Frost-free season | 194 days/year | 60/100 · C |
| Precipitation balance | 54.4 in · 19.4 from 35 in | 31/100 · F |
Brentwood · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Brentwood is a temperate Köppen climate: Cfa
Coldest-month mean 37.1°F and warmest-month mean 77.9°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
- 77.9°F
- Coldest month
- 37.1°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 Brentwood sits across the climate record
Three NOAA fields for Brentwood's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 69th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 12% wettest
- Brentwood's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 39th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Brentwood compares across U.S. station-mapped locations
Brentwood'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 | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 48°F (9°C) | 26°F (-3°C) | 37°F (3°C) | 4.7" | 23.6 | 0.0 |
| February | 53°F (12°C) | 28°F (-2°C) | 41°F (5°C) | 4.7" | 20.8 | 0.0 |
| March | 61°F (16°C) | 35°F (1°C) | 48°F (9°C) | 5.5" | 12.7 | 0.0 |
| April | 71°F (22°C) | 44°F (7°C) | 57°F (14°C) | 4.9" | 3.8 | 0.0 |
| May | 79°F (26°C) | 53°F (11°C) | 66°F (19°C) | 5.7" | 0.3 | 1.0 |
| June | 87°F (30°C) | 63°F (17°C) | 75°F (24°C) | 4.4" | 0.0 | 11.4 |
| July | 90°F (32°C) | 66°F (19°C) | 78°F (26°C) | 4.5" | 0.0 | 16.3 |
| August | 89°F (32°C) | 64°F (18°C) | 77°F (25°C) | 3.7" | 0.0 | 15.8 |
| September | 84°F (29°C) | 57°F (14°C) | 70°F (21°C) | 4.0" | 0.0 | 6.4 |
| October | 73°F (23°C) | 45°F (7°C) | 59°F (15°C) | 3.5" | 2.7 | 0.3 |
| November | 61°F (16°C) | 34°F (1°C) | 47°F (9°C) | 4.0" | 14.0 | 0.0 |
| December | 51°F (11°C) | 29°F (-2°C) | 40°F (5°C) | 4.9" | 20.4 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 90°F around July 7, short of 90°F on every date, while 106 dates carry a normal low at or below freezing, the coldest 26°F near January 20.
The freezing stretch
The normal low stays at or below 32°F into March 6, then returns to freezing around November 22, covering 106 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.
The widest day
November 2 carries the biggest normal gap between afternoon and dawn, 29°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Brentwood.
Where Brentwood Stands Nationally
The normal water year runs well above the national norm at roughly 54 inches.
Brentwood 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
Brentwood spreads its precipitation across the year
Neither half of the year dominates here: June through August take 23% of the annual total and December through February 26%, with neither reaching the 35% that would mark a distinct wet season. Brentwood has no dry season to plan around, though it does carry a 40.8°F seasonal spread.
The gap between the wettest and driest month still matters: May averages 5.7" and October 3.5". The three wettest months together take 30% 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.
Frost Dates & Growing Season
First Fall Freeze
October 26
50% probability date
Last Spring Freeze
April 15
50% probability date
Growing Season
194 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,983
Higher = more heating needed
Cooling Degree Days
1,421
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TN closest to Brentwood 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 (58°F here).
- Albuquerque, NM 58°F · 0.0°F off
- Buffalo, OK 58°F · 0.0°F off
- Lenoir, NC 58°F · 0.0°F off
- Marion, NC 58°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (54.4" here), excluding temperature-peer places.
- Bell, FL 54.4" · 0.0" off
- Dallas, GA 54.3" · 0.1" off
- Huntsville, AL 54.3" · 0.1" off
- Aberdeen, MS 54.3" · 0.1" off
Data-derived climate profile
How Brentwood's climate pattern fits together
heating led · wet · mid swing
Brentwood's energy balance leans toward cold weather: 3,983 annual heating degree days against 1,421 for cooling. Its 40.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Brentwood's frost-free season lasts about 194 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Brentwood's middle-range seasonal profile. The measured spread is 40.8°F. The annual average is 58°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Alongside its heating load, Brentwood carries 54.4 inches of precipitation in a normal year, inside PlainClimate's wet range. Snowfall is not added to the interpretation because its annual value is missing. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Brentwood's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Brentwood, not an official NOAA class or a year-ahead forecast.
Questions about Brentwood's climate
How much rain does Brentwood get? ▼
How many days above 90°F does Brentwood get? ▼
How much energy does heating and cooling require in Brentwood? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Brentwood's primary station: BRENTWOOD (USC00401039). 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 4708280). Match rule for Brentwood: 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 Brentwood 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.