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The adidas Half Marathon is the half-marathon race of the Singapore International Marathon weekend, held in early December. Until 2025 the weekend was the Standard Chartered Singapore Marathon; in 2026 it became the BYD Singapore International Marathon presented by adidas, run by a new organiser, SG International Marathon Pte. Ltd. The half marathon starts at 4:30 on the Saturday morning at the F1 Pit Building and finishes at the National Stadium in Kallang, so it runs point to point. The cut-off is 3 hours 45 minutes. Entries for the 2026 half marathon were sold out. The full marathon starts at the same place and time on the Sunday and finishes in the same stadium; it is the 44th edition of the race, which began in 1982. The 10K and 5K are run on the Friday evening of the same weekend.
Weather
Typical climate for the race month — an estimate, not a forecast or a race-day record
December in Singapore is hot, humid and wet: highs average about 30°C and lows about 24°C, with relative humidity near 85% and rain on most days, which is why the start is at 4:30 in the morning.
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Fun Facts
- ▸ The 2026 weekend was the first title-sponsor change in 22 years for the race that had been the Standard Chartered Singapore Marathon.
- ▸ The 2026 weekend ran over three days, with the 10K on Friday evening, the half marathon on Saturday and the marathon on Sunday.
- ▸ The Singapore marathon was first held in 1982, and 2026 was its 44th edition.
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