Can You Make Toffee in Humid Weather?

What it means

• Toffee is hygroscopic: at the hard-crack stage it holds very little water, so it pulls moisture from humid air and can turn tacky.
• A common rule of thumb is to cook candy a degree or two higher on very humid days to compensate.
• The bigger risk comes after cooking—unwrapped toffee softens quickly in humid conditions.

Action steps

1. Cook to a solid hard-crack, aiming for the higher end (around 305–310°F / 152–154°C).
2. Work quickly and avoid a steamy kitchen; run air conditioning or a dehumidifier if you can.
3. Cool the toffee away from stovetop steam.
4. Store the finished, set pieces airtight as soon as possible.

Risks & deadlines

• In high humidity, undercooked toffee may never set firm—hit the full hard-crack temperature.
• Left exposed to humid air, finished toffee gets sticky fast; seal it airtight.