Clarksdale, MS: the heat pump payback math
In Clarksdale, the math is close enough that it comes down to how long you plan to stay. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,500 after a $2,000 federal tax credit. Lower bills claw that back: about $262 saved annually, for a payback of roughly 13.4 years. It's a genuine toss-up here — Clarksdale's numbers don't point clearly either way.
Clarksdale's weather, in the numbers that matter
2314 heating degree days pile up here every year, so Clarksdale has a mild winter by US standards; the cooling side runs to 2389 cooling degree days, where summers are hot enough that cooling matters as much as heating. 12.2°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 8.6°F on file. Worked through the model, that's a seasonal COP of 2.99 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, Clarksdale sits firmly in cold-climate territory, so that's the class of unit priced here. These numbers come from FLETCHER FIELD AIRPORT, the closest NOAA station, 8 miles out.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 1,960 kWh a year to keep it warm, plus cooling, for a combined electric bill near $618 a year. The gas furnace it replaces burns roughly 24 Mcf a year at 16.64 per Mcf here, for a running cost near $880 a year (electricity here runs 15.47¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is roughly 51.6 years, leaving the 15-year total $426 ahead.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Clarksdale — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Clarksdale's answer improves. The saving here runs about $767 a year, which recovers the extra $8,000 spent going electric in roughly 10.4 years.
How Clarksdale compares nationally
Among 3206 cities, Clarksdale's winter puts it at rank 2270 for severity, while its size puts it at rank 2535 for population — 1 in both cases being the extreme. That's the mildest third of cities covered, where utility rates carry more of the answer than climate does.
Next step for 13,861 people in Clarksdale
Clarksdale, Mississippi is home to about 13,861 people, and the figures above are the same ones a local HVAC contractor uses to size and quote a system — this site doesn't guess where a real quote would land, it just tells you whether it's worth asking for one. In Clarksdale, nothing is lost by holding off until the current equipment genuinely fails.
Ask a local HVAC contractor for a quote before committing either way.
More on how this number was built
Nothing above is a black box: the methodology guide shows the full arithmetic behind Clarksdale's 2.99 seasonal COP and payback figure. Clarksdale's 12.2°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.