Race Day Weather Impact Tool
Combine temperature, wind, and humidity to estimate the full weather impact on your race performance. Get a realistic pace adjustment for race day conditions.
Fetch race day forecast
Enter your race location and date to auto-fill weather conditions.
Or enter conditions manually
Most courses have a mix. Select the dominant direction or the net effect.
Be prepared for any race day conditions
Weather can make or break a race. Having the right gear means you can adapt to whatever conditions arrive.
Garmin Forerunner 265
Real-time pace tracking to adjust your strategy when conditions change. AMOLED display stays readable in bright sun.
View on AmazonHydration Vest
Essential for warm race days when aid stations aren't enough. Carry your own water and nutrition.
View on AmazonSiS Energy Gels
Race nutrition you can carry in a belt or vest. Plan your fuelling around weather-adjusted pace targets.
View on Amazon
I'm Doing My Best Running Jersey
Lightweight, breathable unisex sports jersey in neon yellow. Designed for runners who keep showing up.
Free worldwide shipping on select orders
How the Race Day Weather Impact Tool works
Race day weather impact combines the individual effects of temperature (heat stress model), wind (headwind/tailwind adjustment), and humidity (wet-bulb calculation) into a single pace adjustment estimate.
Frequently asked questions
How do I use this before a race?
Enter the forecast temperature, humidity, and any expected headwind for race day. The tool calculates a combined pace adjustment - add this to your target pace to set a realistic race goal for the conditions.