Humidity and temperature change your charge temperature every season. RoastWeather calculates today's exact adjustment for your roaster so your beans taste consistent year-round.
Live Example
Estimates based on thermodynamic principles and community practice. Always observe your roast curve and adjust to your machine.
Features
Today's ambient temperature, absolute humidity, and barometric pressure combined into one charge temperature number for your roaster.
Drying end, first crack window, and development time ratio — adjusted for your batch size and today's conditions.
Cold+Dry, Hot+Humid, Cold+Humid, Hot+Dry flags with specific heat and airflow guidance for each combination.
See which day this week gives the best roasting conditions. Plan around humidity spikes before they ruin a batch. (Pro)
48-hour absolute humidity trend with pre-acclimation alerts. Know if your stored beans absorbed moisture before you roast. (Pro)
Log every roast with ambient metadata. Compare the same beans across different weather conditions to dial in your profile. (Pro)
Supported Roasters
How It Works
Pick your machine. RoastWeather knows each roaster's baseline charge temperature and behavior
Weather data fetched automatically from Open-Meteo. Temperature, humidity, and pressure updated hourly
See today's charge temp, phase timing, and any cross-effect warnings before you load the drum
Free to use. Pro features $4.99/month.
Download on the App Store