Will a heat pump pay off in Forest Grove, OR?
In Forest Grove, the math is close enough that it comes down to how long you plan to stay. Against a like-for-like gas furnace and AC swap, going electric costs $3,500 more up front here (already netting out a $2,000 tax credit). Forest Grove's residents would see roughly $251 a year back in running costs, putting the payback around 13.9 years. It's a genuine toss-up here — Forest Grove's numbers don't point clearly either way.
How cold Forest Grove actually gets
Degree days tell the story here: Forest Grove racks up 4589 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 411 cooling degree days on the cooling side. 15.1°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 12.9°F on file. Worked through the model, that's a seasonal COP of 3.06 on the cold-climate unit fit for this climate. A cold-climate unit is the right call in Forest Grove — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Source: NOAA station PORTLAND-HILLSBORO AIRPORT, 7.9 miles from Forest Grove — the closest one on record.
The month-to-month numbers for Forest Grove
A 2000-square-foot house here would pull roughly 3,797 heating kilowatt-hours annually on top of cooling, totalling about $628 a year on electricity. The gas furnace it replaces burns roughly 48 Mcf a year at 16.71 per Mcf here, for a running cost near $879 a year (electricity here runs 15.14¢/kWh). Buy it outright, not incrementally, and payback stretches to 53.7 years; over 15 years the net position sits $269 ahead.
Electric resistance heat in Forest Grove, compared
Gas isn't universal in Forest Grove — many houses run on electric heat already. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. The saving here runs about $1,212 a year, which recovers the extra $8,000 spent going electric in roughly 6.6 years.
Forest Grove against the rest of the country
Ranked against the other 3206 cities covered, Forest Grove comes in at 1100 for heating severity — 1 would be the coldest place in the dataset — and 1472 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.
Next step for 27,076 people in Forest Grove
Forest Grove, Oregon is home to about 27,076 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 Forest Grove, 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
Every constant behind this page — the 3.06 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Forest Grove's 15.1°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.