Clarksville & Montgomery County, Tennessee · data checked 6 November 2026
The year in a Clarksville house
A Clarksville house sees about 78 nights a year at or below freezing, almost all from November to March, while the Cumberland River's biggest recorded crests have come in February and May.
Nights at or below 32°F78.4 a year
Rain and snow, inches53.50 a year
Heating degree days3,757 a year
Top 12 Cumberland crests, by monthrecord 62.58 ft
| Month | Nights at or below 32°F | Precipitation, inches | Heating degree days | Top-12 river crests |
|---|---|---|---|---|
| Jan | 21.1 | 4.03 | 859 | 1 |
| Feb | 16.9 | 4.51 | 670 | 6 |
| Mar | 9.6 | 4.78 | 484 | 2 |
| Apr | 1.7 | 4.97 | 210 | 0 |
| May | 0.0 | 5.59 | 53 | 3 |
| Jun | 0.0 | 4.65 | 2 | 0 |
| Jul | 0.0 | 4.59 | 0 | 0 |
| Aug | 0.0 | 3.69 | 0 | 0 |
| Sep | 0.0 | 3.35 | 21 | 0 |
| Oct | 1.1 | 4.31 | 199 | 0 |
| Nov | 10.0 | 4.11 | 502 | 0 |
| Dec | 18.1 | 4.92 | 757 | 0 |
Sources: NOAA NCEI 1991–2020 monthly normals, Clarksville WWTP station (freeze nights, precipitation, heating degree days, rounded); NWS gauge CKVT1 historic crests (our count of the 12 listed by month).
Winter21.1freezing nights in an average January, the year's coldest month
Spring62.58 ftthe Cumberland's record crest at Clarksville, 4 May 2010; flood stage is 46 ft
Summer$139.90CGW water and sewer for 10,000 gallons inside the city, against $76.95 for 5,000
FallNov 1median date of the first 32°F night; insulate crawlspace pipes before itYour bill4 charts
$76.95What does a CGW water and sewer bill cost?CGW water and sewer bill for 5,000 gallons inside the city, July 1, 2024 rates
$139.90Why does the water bill jump in summer?CGW inside-city water and sewer bill at 10,000 gallons, July 1, 2024 rates
9,300 galHow do you check the water meter for a leak?yearly water lost to leaks in an average US household (EPA, page updated March 2026)
$142.60What do gas and electric cost in Clarksville?CDE Lightband residential bill for 1,000 kWh, November 2026 rates, before taxes
Your water4 charts
5.67 gpgHow hard is Clarksville's tap water?average hardness of CGW tap water in 2025 (97 mg/L as calcium carbonate)
49 ppbWhat Clarksville's 2025 water report showsTTHM running annual average in 2025, the reading closest to its limit (80 ppb)
AI picture0 leadDoes a Clarksville house have a lead service line?lead service lines in CGW's public map layer, our count of 83,135 records on 6 Nov 2026
1 a yearHow often should a Montgomery County well be tested?TDEC's recommended bacteria test frequency for a private well (page updated 25 Aug 2026)
Your pipes7 charts
78.4 nightsWhen does Clarksville freeze, and how often?average nights a year at or below 32°F, Clarksville WWTP station, NOAA 1991–2020
AI picture27.8°FWhy crawlspace pipes freeze in Clarksvilleaverage January low, Clarksville WWTP station, NOAA 1991–2020 normals
55°FLeaving a Clarksville house empty for the winterminimum thermostat setting the Red Cross advises when you are away in cold weather
62.58 ftHow high does the Cumberland get at Clarksville?record crest, Cumberland River at Clarksville (NWS gauge CKVT1), May 4, 2010
70 ftWhy does Clarksville get sinkholes?maximum preserved thickness of the Ste. Genevieve Limestone, USGS state geologic map
AI picture$400Who issues septic permits in Montgomery County?TDEC permit fee, new conventional septic system up to 1,000 gpd (archived Aug 2026)
$25,000Who can pull a plumbing permit in Clarksville?project cost at which Tennessee requires a contractor's license (archived Apr 2026)
Your heater4 charts
AI picture$388 a yearWhat does a water heater cost to run in Clarksville?energy for a 50-gal electric tank at the federal minimum, CDE rate of Nov 2026
AI picture$900 offIs a heat pump water heater worth it here?TVA EnergyRight discount on a qualifying ENERGY STAR heat pump water heater, Oct 2026
AI picture120°FWhat temperature should your water heater be?setting DOE says most households need at the water heater (archived DOE page, May 2026)
AI picture6 monthsHow often should you flush a water heater?when the electric heater manual says to drain and flush first; then at least once a year