Three Hearts Marathon

Radenci, Slovenia · May 15, 2027

58°·64° high·Light·Rain possible

Weather

Three Hearts Marathon race day weather

58°at start

64° high

Breezy

Rain possible

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Cool start, warming finish

Runners will face a temperature increase from 58°F at the start to 64°F by midday, with high humidity at 66%. Winds will be light, not significantly affecting performance. With a chance of light rain, it's advisable to stay hydrated and consider pacing conservatively as temperatures rise.

Race day forecast available in 168 days

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Distance: 26.2mi

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About the Three Hearts Marathon

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.

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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

Three Hearts Marathon 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.

What is the weather usually like for the Three Hearts Marathon?

Over the 6 years racecast.io has race-day weather for (2019 to 2026), it averaged 58°F at the start and 67°F by a typical finish. Rain fell during race hours in 2 of those years (2022 and 2026).

What was the hottest Three Hearts Marathon?

Of the 6 years on record, 2022 was the warmest, reaching 79°F during race hours. The coldest start was 2026, at 52°F.

What was the windiest Three Hearts Marathon?

Of the 6 years on record, 2026 was the windiest, with wind averaging 8 mph during race hours. The calmest was 2019, at 3 mph.

Three Hearts Marathon weather history

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°