Warm Water Temperature Chart for Sourdough in a Cold 64 Degree (64°F / 18°C) Kitchen — Stand Mixer Low Speed (78°F DDT)
Winter thermal compensation: using 112°F (44.4°C) mix water to overcome 64°F flour and hit a 78°F Desired Dough Temperature.
If you mix with 60°F tap water in a 64°F (17.8 Celsius) kitchen using stand mixer low speed (78°f ddt), the dough will land well above 78°F and ferment far too fast. The arithmetic 4 × 78°F − (64 + 64 + 64 + 8) gives the required 112°F (44.4°C) mix temperature instead. Mixing all 350g of water at 112°F (44.4°C) is enough; crushed ice would be overkill.
- Required Water Temp
- 112°F (44.4°C)To hit 78°F DDT in 64°F room
- 350g Batch Ice Split
- 0g Ice / 350g WaterBased on 60°F tap water & 80 cal/g latent heat
- Mixer Friction Factor
- +8°FStand Mixer Low Speed
- Target Final Dough Temp
- 78°F (25.6°C)Locks fermentation clock & protease rate
Desired Dough Temperature Grid at 64°F (17.8°C) Using Stand Mixer Low Speed (78°F DDT)
Read the ice column as a direct instruction: weigh that much crushed ice and make up the balance with 60°F tap water.
| Total Water | Calculated Temp | Ice Quantity | Tap Water Quantity | Dough Temp Target |
|---|---|---|---|---|
| 300g water (64°F / +8°F) [Baseline] | 112°F (44.4°C) | 0g (no ice needed) | 300g tap water (@ 60°F) | 78°F (25.6°C) final dough |
| 350g water (64°F / +8°F) Down 50g | 112°F (44.4°C) | 0g (no ice needed) | 350g tap water (@ 60°F) | 78°F (25.6°C) final dough |
| 500g water (64°F / +8°F) Up 50g | 112°F (44.4°C) | 0g (no ice needed) | 500g tap water (@ 60°F) | 78°F (25.6°C) final dough |
| 250g water (64°F / +8°F) Down 100g | 112°F (44.4°C) | 0g (no ice needed) | 250g tap water (@ 60°F) | 78°F (25.6°C) final dough |
| 400g water (64°F / +8°F) Up 150g | 112°F (44.4°C) | 0g (no ice needed) | 400g tap water (@ 60°F) | 78°F (25.6°C) final dough |
Custom Batch Recalculation Engine
Fine-tune starter hydration between 50% stiff and 125% liquid while keeping your desired dough temp (ddt) & ice solver ratios locked.
Cold Kitchen Calorimetry: Why a 64°F Room Needs 112°F Mix Water (Stand Mixer Low Speed (78°F DDT))
Heat capacity differences matter at the margin. Flour and water do not absorb thermal energy identically, so the lumped-parameter approach behind the 4-factor DDT equation treats them as a single averaged mass. The practical error is typically within 1°F, which is why probing the finished dough with a probe thermometer is the final check rather than the first.
Humidity shifts the effective room temperature slightly. A dry 64 degrees (17.8°C) day pulls moisture out of the dough surface and cools it a little, so a humid morning may want half a degree less cold water than the table suggests.
Thermal Control Protocol for Stand Mixer Low Speed (78°F DDT) in a 64°F Room
- Check for Sunlight: A 64°F (17.8 Celsius) reading taken in direct sun is unreliable — move the bowl to the work surface and re-probe before you trust the arithmetic.
- Equalise the Levain: Pull the starter out of the refrigerator and let it come toward 64°F, because the levain is a third of the 4-factor equation and a cold levain silently drags the whole dough down.
- Set the Kettle: Bring 350g of water to 112°F (44.4°C) and use it immediately.
- Mix, Probe and Trust: Run stand mixer low speed (78°f ddt) (+8°F), then confirm the dough reads 78°F ± 1°F before the fermentation clock starts.
Technical Q&A: Warm Water Temperature Chart for Sourdough in a
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 0g of crushed ice does the job in under a minute.
How much ice do I add to 350g of bread water in a 64°F room (Stand Mixer Low Speed (78°F DDT))?
No ice is needed — use 350g of liquid water tempered to 112°F (44.4°C).
Can I mix the ice directly into the flour?
Yes, and it is often the better technique. Mixing 0g of crushed ice into the 350g of water and flour together chills the mass faster than adding cold water to warm flour, and the 80 cal/g phase change is fully captured.