Weatherproof Your Herd’s Welfare.

Temperature is only half the story. Humidity changes everything — and HealTHI gives UK dairy teams the THI forecast, shed-level readings, and reports they need before heat stress hits performance.

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Learn About THI

What is the Temperature Humidity Index (THI)?

THI combines temperature and humidity into one practical stress signal. Dairy cows can experience significant heat stress from around 22°C when humidity pushes THI above 68 — often before the shed feels dangerously hot to people.

The Hidden Costs of Heat Stress.

Reduced Milk Yields

Heat stress can cost around 2.2kg of milk per cow daily — losses that compound fast across a full herd.

Crashing Fertility Rates

When cows are heat stressed, conception rates can fall from 25% to 7%, making climate control a reproduction issue too.

Increased Lameness

Cows stand longer to shed heat, increasing hoof pressure and raising the risk of lameness across the group.

How the HealTHI App Works to help you stay on top of the heat

Instant THI status for the day

Plan ventilation, shade, feed timing, and welfare checks around precise THI windows today and the expected forecast for the rest of day and the rest of the week.

Custom insights for your farm

Alerts on severe levels with insights on expected heat stress levels, overnight relief and potential impact on animal beahaviour to watch out for.

Instant THI status for the day

Easy visualisation of 7 day and 14 day historic THI levels to quickly scan how the trend has been, which can be informative to plan for the upcoming days.