Tri-Cities Marathon

Richland, WA, USA · October 25, 2026

45°·58° high·Light·Dry

Race Day Weather

45°at start

61° high

Light

Dry

Cool temperatures, light winds

Runners will face a steady temperature rise from 45°F to 60°F, with humidity averaging 64%. Light winds from the WSW at 8 mph will have minimal impact. The cool conditions allow for a strong start, but hydration should be prioritized as temperatures increase.

Race day forecast available in 41 days

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Race Info

Area Map

Course Map

FAQ

When is the 2026 Tri-Cities Marathon?

The 2026 Tri-Cities Marathon will be held on Sunday October 25, 2026.

What will the weather be like for the 2026 Tri-Cities Marathon?

The forecast calls for a high of 65°F and a low of 45°F with a 5% chance of rain.

Historical Weather

Based on 1 years of data

Avg Temp

46°F

L:24° H:46°

RunScore

Conditions

Rain Freq

0%

0 of 1 yrs

Wind1mph

Dew29°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Conditions	Low / High	Rain	Dew Point	Score
2023 Tri-Cities Marathon Clear conditions throughout the day. 2023		24°/46°	-	27°

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