Temperature reference

88–95°F Sourdough (31.10–35.00°C)

Bulk multiplier: 0.420× · Proof multiplier: 0.420× · Activity: extreme-mold-risk

Recommendation

Very hot — avoid. Mold risk rises sharply above 85°F. Fermentation outpaces structural development. Levain becomes unbalanced toward lactic acid producers, creating cloying sour flavor. Only use briefly for refreshing starters or if absolutely unavoidable. Move dough to cooler location, or skip this bake and wait for cooler conditions. If baking must happen, reduce levain to 8%, bulk 90 min max, get into refrigerator immediately after shaping.

Timing calculator at this temperature

Multiplier at 92°F
0.39×
Adjusted bulk ferment
1.6 h
Adjusted final proof
4.7 h
How the math works

Multipliers are piecewise-linear interpolations between reference points measured by Myhrvold et al. in Modernist Bread vol 3. 76°F is the baseline (1.0×); every 10°F drop roughly doubles fermentation time, and every 10°F rise roughly halves it.

How each style behaves at this temperature

Click any style to see its full timing at 88–95°F: