Climate Comfort Score
68/100
Good
NOAA 1991–2020 normals 59°F annual avg Public-domain federal data
Rock Island SP, TN Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 59°F
- Avg annual temp
- 68/100
- Comfort score
- 59.4"
- Annual precip
- 207d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Rock Island SP
Rock Island SP, Tennessee averages 59°F a year and scores 68/100 on the comfort index - good, milder than 58% of U.S. cities.
- 59°F
- yearly average temperature, NOAA normal
- 68/100
- comfort score, milder than 58% of U.S. cities
- 59.4"
- yearly precipitation total
- 207 days
- frost-free days per growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
59°F (15°C)
Avg High
69°F
Avg Low
49°F
Annual Precip
59.4"
Comfort Score
68/100
Good
Avg Annual Temperature
59°F
30-year mean (NOAA NCEI)
Annual Precipitation
59.4"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Rock Island SP) 68.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Rock Island SP area.
How Rock Island SP compares to every U.S. city
Rock Island SP's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 42% higher than 58% 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 Rock Island SP
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Rock Island SP'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 | 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 |
Monthly Precipitation
Average monthly rainfall
January 5.1"
February 5.1"
March 6.0"
April 5.2"
May 4.8"
June 5.4"
July 5.3"
August 4.3"
September 4.0"
October 3.5"
November 4.6"
December 6.2"
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
Nearby Cities
What Rock Island SP's climate means for you
Rock Island SP runs 59°F a year - peaking in July, coldest in January.
- Gardeners get about 207 frost-free days, with the last spring freeze near April 6 - plan the planting calendar around it, not the regional average.
- Energy bills track 3,622 heating and 1,402 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: Rock Island SP, TN
Based on station USC00407808 feeding NOAA's 1991–2020 climate normals, Rock Island SP, Tennessee averages 59°F a year, ranging from a mean daily high of 69°F to a mean daily low of 49°F. July is typically the warmest month of the year, while January is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Beyond temperature, Rock Island SP averages 59.4 inches of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 207 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 6 and the first fall freeze near October 30. Turning to energy use, 3,622 heating degree days and 1,402 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Rock Island SP scores 68/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above turn that into a planning tool: expect the mildest highs and lows in the shoulder seasons, July-driven heat at the peak of summer, and January-driven cold at the depth of winter. Every number here is a thirty-year average, not a forecast, so any given year can and does run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Rock Island SP, TN? ▼
The average annual temperature in Rock Island SP, Tennessee is 59°F. The warmest month averages 87°F (30°C) and the coldest averages 29°F (-1°C).
How much rain does Rock Island SP get? ▼
Rock Island SP receives 59.4 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Rock Island SP? ▼
Rock Island SP has a climate comfort score of 68/100 (Good), milder than 58% of U.S. cities in the PlainClimate database.
When is the growing season in Rock Island SP? ▼
Rock Island SP has approximately 207 frost-free days per year, with the last spring freeze around April 6 and the first fall freeze around October 30.
How much energy does heating and cooling require in Rock Island SP? ▼
Rock Island SP has 3,622 heating degree days and 1,402 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 Rock Island SP climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00407808 near Rock Island SP.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00407808. 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.