Three Hearts Marathon

Radenci, Slovenia · May 15, 2027

58°·64° high·Light·Rain possible

Weather

Race Day Weather

58°at start

64° high

Breezy

Rain possible

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Mild temps, light rain possible

Runners will face a temperature range from 56°F to 64°F, with average humidity at 66%. A light rain is possible, with an intensity of 0.02 in/hr. With a steady headwind throughout, runners should consider adjusting their pace and increase hydration frequency to combat the humidity.

Race day forecast available in 209 days

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Distance: 26.2mi

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Race Info

The Three Hearts Marathon (Maraton treh src) has run in Radenci, Slovenia since 1981. The race starts and finishes at the Zdravilišče Radenci spa resort and follows a single loop that crosses into Bad Radkersburg, Austria before returning to Slovenia. It has served as the Slovenian national marathon championship in even-numbered years since 1998, sharing that role with the Ljubljana Marathon. The men's course record is 2:15:26, set by Kenya's David Biwott in 2006; the women's record is 2:38:10, set by Kenya's Sheila Chebet in 2024.

Website

Race weekend

Saturday, May 15

9:00 AMMarathon (26.2 mi)

9:00 AMHalf Marathon (13.1 mi)

9:00 AMThree Hearts Relay (45.5 mi)

9:15 AM10K (6.2 mi)

9:15 AM5K (3.3 mi)

9:20 AMNordic Walking (6.2 mi)

Course Map

FAQ

When is the 2027 Three Hearts Marathon?

The 2027 Three Hearts Marathon will be held on Saturday May 15, 2027.

What will the weather be like for the 2027 Three Hearts Marathon?

The forecast calls for a high of 70°F and a low of 52°F with a 16% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 6 years of data

Avg Temp

63°F

L:58° H:67°

RunScore

Conditions

Rain Freq

33%

2 of 6 yrs

Wind5mph

Dew50°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Three Hearts Marathon Partly cloudy throughout the day with rain. 2026	52°/58°	Light	44°
2025 Three Hearts Marathon Partly cloudy throughout the day. 2025	56°/62°	-	38°
2024 Three Hearts Marathon Partly cloudy throughout the day. 2024	55°/70°	-	54°
2023 Three Hearts Marathon Partly cloudy throughout the day with morning rain. 2023	63°/71°	-	57°
2022 Three Hearts Marathon Partly cloudy throughout the day with rain in the morning and afternoon. 2022	69°/79°	Light	59°
2019 Three Hearts Marathon Partly cloudy throughout the day. 2019	53°/63°	-	50°