Summer Sourdough Crushed Ice & Water Temp Chart for a Hot 80 Degree (80°F / 27°C) Kitchen — Stand Mixer Knead 8-Min (78°F DDT)
4-factor Desired Dough Temperature (DDT) and 80 cal/g latent heat crushed-ice calculation for hitting 78°F dough in a hot 80°F room.
Heat flows in two directions in a 80 deg F (26.7°C) kitchen: heat flows from the 80 deg F flour and levain into the dough, and stand mixer knead 8-min (78°f ddt) adds +14°F of its own. To land the finished dough on 78°F, the 316g of liquid water must enter at 58°F (14.4°C). Cooling from 76°F tap water down to 58°F means melting 34g of ice into the 350g batch and leaving 316g of liquid water; each gram of ice absorbs 80 cal on melting alone.
- Required Water Temp
- 58°F (14.4°C)To hit 78°F DDT in 80°F room
- 350g Batch Ice Split
- 34g Ice / 316g WBased on 76°F tap water & 80 cal/g latent heat
- Mixer Friction Factor
- +14°FStand Mixer Knead 8-Min
- Target Final Dough Temp
- 78°F (25.6°C)Locks fermentation clock & protease rate
Water Temperature Solver: 80°F (26.7°C) Room, Stand Mixer Knead 8-Min (78°F DDT) (+14°F)
Each row re-solves the 4-factor equation at a different batch size; the 58°F target stays constant while the ice mass scales.
| Batch Water Weight | Required Mix Temperature | Crushed Ice Weight | Liquid Water Needed | Final Dough Temperature |
|---|---|---|---|---|
| 300g water (80°F / +14°F) [Anchor] | 58°F (14.4°C) | 29g crushed ice | 271g tap water (@ 76°F) | 78°F (25.6°C) final dough |
| 350g water (80°F / +14°F) Quarter Batch | 58°F (14.4°C) | 34g crushed ice | 316g tap water (@ 76°F) | 78°F (25.6°C) final dough |
| 500g water (80°F / +14°F) Three-Quarter Batch | 58°F (14.4°C) | 48g crushed ice | 452g tap water (@ 76°F) | 78°F (25.6°C) final dough |
| 250g water (80°F / +14°F) Half Batch | 58°F (14.4°C) | 24g crushed ice | 226g tap water (@ 76°F) | 78°F (25.6°C) final dough |
| 400g water (80°F / +14°F) Double Batch | 58°F (14.4°C) | 38g crushed ice | 362g tap water (@ 76°F) | 78°F (25.6°C) final dough |
Real-Time Dough & Starter Scaling Sandbox
Scale this What Water Temp for Sourdough in a 8 specification up or down on your digital scale with zero hydration drift.
Baking Sourdough in a Hot 80°F Room: Why You Need 58°F Water (34g Ice)
The Desired Dough Temperature equation treats the dough as a single thermal mass with four contributions. For this 80°F (26.7 Celsius) kitchen, three of them — room, flour and levain — are each 80°F, and the fourth is the +14°F that stand mixer knead 8-min (78°f ddt) adds through shear. Solving for the water temperature is the only way to hit 78°F exactly.
Mixing temperature is not dough temperature. The 14°F allowance for stand mixer knead 8-min (78°f ddt) assumes the heat is distributed through the mass rather than concentrated in the dough hook's path, so a slow first minute of mixing keeps the correction honest.
Thermal Control Protocol for Stand Mixer Knead 8-Min (78°F DDT) in a 80°F Room
- Measure the Room First: Confirm the kitchen really is 80°F (26.7 Celsius) with a thermometer on the counter, not on the window, because radiant sun can read several degrees warmer than the working surface.
- Temper Flour and Levain: Bring both to 80°F before mixing. Cold flour is the most common reason a 78°F target is missed in a 80°F (26.7 Celsius) kitchen.
- Combine 34g Crushed Ice with 316g Tap Water: Mix the ice into the 76°F water first and let it chill completely before it touches the flour.
- Mix and Check: After stand mixer knead 8-min, probe the dough — it should read 78°F (±1°F) given the +14°F friction allowance.
Diagnostic Answers: What Water Temp for Sourdough in a 80°F (27°
What is the DDT formula for a 80°F kitchen using Stand Mixer Knead 8-Min (78°F DDT)?
Target water temperature = (4 × 78°F) − (80°F room + 80°F flour + 80°F levain + 14°F friction) = 58°F (14.4°C).
Does humidity in a 80°F (26.7°C) kitchen change the water temperature?
Marginally. On a humid morning the dough surface loses less moisture and cools a little less, so half a degree less cold water is usually right. Treat it as a refinement, not a correction.
Do I need crushed ice or is a cold fridge fine?
Crushed ice, always. Chilling the bowl in the refrigerator removes heat far too slowly for a 350g batch; the 80 cal/g latent heat of fusion in 34g of crushed ice does the job in under a minute.