Rock Island State Park, TN Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Rock Island State Park's primary NOAA station, ROCK ISLAND SP.
The climate verdict for Rock Island State Park
Water is the standout signal in Rock Island State Park, Tennessee: 59.4 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 59°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 59°F
- yearly average temperature, NOAA normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 59.4"
- yearly precipitation total
- 207 days
- growing season, frost-free days
Rock Island State Park: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00407808 · Rock Island State Park, TN 59°F mean · 59.4" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-WET · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 59°F
- RANK-UPPER #4,871
- PHOTO-FINISH ≈ Forest City
- PRCP-WET 59.4"
- SWING-MID 39°F
- COMF-MID 68/100
- LOAD-HEAT 3,622 HDD
- STN-1 USC00407808
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Forest City, NC ( -0.1 °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.
- Rock Island Sta… (this station) 59°F
- Cold Forest City, NC 59°F
- Hot Elida, NM 59°F
- Near Newport, TN 59°F
- Near Bridgeport, AL 59°F
Climate Living Index · Rock Island State Park
Rock Island State Park: 66/100 · grade C
Rock Island State Park publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Rock Island State Park, 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 | 59 calendar days | 89/100 · A |
| Annual temperature balance | 58.8°F · 8.7° from 67.5°F | 72/100 · B |
| Frost-free season | 207 days/year | 69/100 · C |
| Precipitation balance | 59.4 in · 24.4 from 35 in | 14/100 · F |
Rock Island State Park · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Rock Island State Park is a temperate Köppen climate: Cfa
Coldest-month mean 38.5°F and warmest-month mean 77.1°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
- 77.1°F
- Coldest month
- 38.5°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 Rock Island State Park sits across the climate record
Three NOAA fields for Rock Island State Park's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 29% warmest
- Among 6,861 stations, Rock Island State Park sits in the warmer third of annual means.
- Annual precipitation
- Top 6% wettest
- Rock Island State Park's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 70%
- Warmest-to-coldest month gap for Rock Island State Park is compact versus 6,861 complete station-years.
How Rock Island State Park compares across U.S. station-mapped locations
Rock Island State Park'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) | 29°F (-1°C) | 39°F (4°C) | 5.1" | 20.5 | 0.0 |
| February | 53°F (11°C) | 32°F (0°C) | 42°F (6°C) | 5.1" | 16.4 | 0.0 |
| March | 62°F (16°C) | 39°F (4°C) | 50°F (10°C) | 6.0" | 8.3 | 0.0 |
| April | 70°F (21°C) | 47°F (8°C) | 59°F (15°C) | 5.2" | 1.4 | 0.0 |
| May | 78°F (26°C) | 56°F (13°C) | 67°F (19°C) | 4.8" | 0.0 | 0.8 |
| June | 84°F (29°C) | 64°F (18°C) | 74°F (24°C) | 5.4" | 0.0 | 5.9 |
| July | 87°F (30°C) | 68°F (20°C) | 77°F (25°C) | 5.3" | 0.0 | 9.1 |
| August | 86°F (30°C) | 67°F (19°C) | 76°F (25°C) | 4.3" | 0.0 | 7.6 |
| September | 80°F (27°C) | 61°F (16°C) | 70°F (21°C) | 4.0" | 0.0 | 3.3 |
| October | 71°F (22°C) | 48°F (9°C) | 59°F (15°C) | 3.5" | 1.3 | 0.4 |
| November | 61°F (16°C) | 38°F (3°C) | 49°F (10°C) | 4.6" | 9.7 | 0.0 |
| December | 52°F (11°C) | 32°F (0°C) | 42°F (6°C) | 6.2" | 16.6 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 87°F around July 13, short of 90°F on every date, while 59 dates carry a normal low at or below freezing, the coldest 29°F near January 13.
The freezing stretch
The normal low stays at or below 32°F into February 14, then returns to freezing around December 18, covering 59 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
April 17 carries the biggest normal gap between afternoon and dawn, 24°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Rock Island State Park.
Where Rock Island State Park 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.
Rock Island State Park 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
Rock Island State Park spreads its precipitation across the year
Neither half of the year dominates here: June through August take 25% of the annual total and December through February 28%, with neither reaching the 35% that would mark a distinct wet season. Rock Island State Park has no dry season to plan around, though it does carry a 38.6°F seasonal spread.
The gap between the wettest and driest month still matters: December averages 6.2" 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 30
50% probability date
Last Spring Freeze
April 6
50% probability date
Growing Season
207 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,622
Higher = more heating needed
Cooling Degree Days
1,402
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TN closest to Rock Island State Park 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 (59°F here).
- Clovis, NM 59°F · 0.0°F off
- Helena, OK 59°F · 0.0°F off
- Murray, KY 59°F · 0.0°F off
- Paducah, KY 59°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (59.4" here), excluding temperature-peer places.
- Houston, MS 59.3" · 0.1" off
- Lake Lure, NC 59.3" · 0.1" off
- Leesville, LA 59.3" · 0.1" off
- Jena, LA 59.5" · 0.1" off
Data-derived climate profile
How Rock Island State Park's climate pattern fits together
heating led · wet · mid swing
Rock Island State Park's energy balance leans toward cold weather: 3,622 annual heating degree days against 1,402 for cooling. Its 38.6°F seasonal range still makes the monthly rows more useful than the annual average alone.
Rock Island State Park's frost-free season lasts about 207 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 Rock Island State Park's middle-range seasonal profile. The measured spread is 38.6°F. The annual average is 59°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Alongside its heating load, Rock Island State Park carries 59.4 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 Rock Island State Park'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 Rock Island State Park, not an official NOAA class or a year-ahead forecast.
Questions about Rock Island State Park's climate
How much rain does Rock Island State Park get? ▼
How much energy does heating and cooling require in Rock Island State Park? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Rock Island State Park's primary station: ROCK ISLAND SP (USC00407808). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Rock Island State Park; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Rock Island State Park 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.