Most of the difference is colder weather — your heating ran more. You used 889 therms this period against 822 in December.
Charges and taxes for the period; any previous balance is not part of the change.
Colder weather
This period had 529 heating degree days against 486 — 9% colder. At the same gas per degree of cold, that alone is about 63 therms more.
Weather adjustment
The weather adjustment credit went from $0.0124 to $0.0161 a therm. It evens out the delivery part of your bill when weather strays from normal (505 degree days is normal for this period), softening bills in extreme winters.
Usage beyond the weather
Even allowing for the cold, you used about 5 therms more than your home usually does. Common causes: a higher thermostat, a new gas appliance, guests, or a leak. If you ever smell gas, leave and call (979) 555-0199 from outside.
Budget billing
About $225.00 a month, from the last twelve bills, settled once a year.
Payment arrangement
Spread this bill over the next few without collection activity.
Energy assistance referral
Local agencies; a pledge pauses collections while it is processed.
Emergency line for anything that smells like gas: (979) 555-0199.
| Dec 2025 | Jan 2026 | |
|---|---|---|
| Therms billed | 821.54 | 888.97 |
| … the weather alone predicts | 884.23 | |
| Heating degree days | 486 | 529 |
| Normal degree days | 455 | 505 |
| Base load (summer) | 113.0 th | |
| Gas cost (PGA) / th | $0.41200 | $0.41200 |
| Weather adjustment / th | −$0.01240 | −$0.01610 |
| Customer charge | $48.00 | $48.00 |
| Distribution, first 500 th | $0.10850 | $0.10850 |
| Distribution, beyond | $0.08420 | $0.08420 |
| GRIP rider / th | $0.03070 | $0.03070 |
| Charges and taxes | $483.32 | $514.74 |
Starting from the Dec 2025 bill, the engine re-prices it at the volume the weather predicts, then at the volume used, then swaps in this period’s gas cost, weather adjustment, and each base rate in turn. Every step is priced line by line and rounded the way the biller writes lines, so the steps add to the real difference — +$31.42 — to the cent. It reproduces every issued bill in the system exactly.