Three Hearts Marathon

Radenci, Slovenia · May 16, 2026
partly-cloudy-day57°·65° high·Light·Dry
9
Weather
Course
FAQ
History

Race Day Weather

partly-cloudy-day
57°at start
65° high
Light
Dry

Cool conditions, steady effort

Runners will face temperatures ranging from 55°F to 65°F, with a moderate humidity of 67% and a dew point of 49°F. Winds will be light at 6 mph from the SSE, with occasional gusts up to 14 mph. To optimize performance, runners should pace themselves conservatively in the warmer late race phase.

Race day forecast available in 13 days
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9

Get forecast alerts for Three Hearts Marathon

We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

Race Info

Website
Area Map

Course Map

Course Map Unavailable

We don't have course map data for Three Hearts Marathon yet. If you have a GPX file (or other format) for this race, we'd love to add it!

FAQ

Ask a Question about the Three Hearts Marathon

Racecast Concierge (free during beta)

Ask a question about the Three Hearts Marathon and we'll do the hard part and find the answer for you within 48 hours.

By using Racecast Concierge, you agree to receive email alerts pertaining to the Three Hearts Marathon and general racecast.io updates.

When is the 2026 Three Hearts Marathon?

The 2026 Three Hearts Marathon will be held on Saturday May 16, 2026.

What will the weather be like for the 2026 Three Hearts Marathon?

The forecast calls for a high of 65°F and a low of 51°F with a 0% chance of rain.

Historical Weather

Based on 4 years of data
Avg Temp
72°F
L:61° H:73°
RunScore
8
Conditions
Rain Freq
25%
1 of 4 yrs
Wind5mph
Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore

2025 Three Hearts Marathon

Partly cloudy throughout the day.

2025
cloudy
56°/63°-
9

2024 Three Hearts Marathon

Partly cloudy throughout the day.

2024
partly-cloudy-day
55°/75°-
8

2023 Three Hearts Marathon

Partly cloudy throughout the day with morning rain.

2023
clear-day
63°/74°-
8

2022 Three Hearts Marathon

Partly cloudy throughout the day with rain in the morning and afternoon.

2022
rain
69°/81°Light
8

Race Day Alerts

Get notified when the Three Hearts Marathon forecast shifts — so you can adjust your gear, pacing, and strategy.

Forecast shift alerts (temp, wind, rain)
Updates as weather changes leading up to race day
Max one message per day
Text Alerts

USA, UK, and Canada only. Standard rates apply.

or
Email Alerts

By subscribing you agree to receive race forecasts and racecast.io updates.

Submit a correction

Spot something wrong or missing for the Three Hearts Marathon? Let us know and we'll update it.

You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR

Submit a race

Missing a race? Send it in and we'll add it to Racecast.