Snohomish River Run 5K

Snohomish, WA, USA · October 17, 2027·
partly-cloudy-day48°·50° high·Light·Rain possible
10
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Race Day Weather

partly-cloudy-day
48°at start
56° high
Light
Rain possible
Your goal
0:00:00

Cool start — fast day potential, chance of rain

A cool 48°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temperatures rising to 56°F through the course will gradually increase perceived effort in the second half. There's a chance of rain, so have a backup gear plan ready. Moderate humidity at 78% is worth noting for effort level, especially in later miles.

Race day forecast available in 346 days
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Pace Calculator

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Race Plan

Get your personalized Snohomish River Run 5K race plan

A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

Race Info

The Snohomish River Run 5K starts and finishes on First Street in downtown Snohomish. After running along First Street, it heads out on Lowell Snohomish River Road for an out-and-back on a flat, open road before returning to the finish. It is the shortest race on the same Sunday as the marathon, half marathon and 10K.

Race weekend

Sunday, October 17
7:30 AMMarathon (26.2 mi)8:00 AMHalf Marathon (13.1 mi)9:00 AM10K (6.2 mi)
9:30 AM5K (3.1 mi)

FAQ

When is the 2027 Snohomish River Run 5K?

The 2027 Snohomish River Run 5K will be held on Sunday October 17, 2027.

What will the weather be like for the 2027 Snohomish River Run 5K?

The forecast calls for a high of 58°F and a low of 43°F with a 29% chance of rain. Check our detailed hourly forecast above for the best 5K race plan.

Historical Weather

Based on 15 years of data
Avg Temp
52°F
L:51° H:53°
RunScore
9
Conditions
Rain Freq
13%
2 of 15 yrs
Wind6mph
Dew45°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
clear-day
44°/48°-
10
2025
partly-cloudy-day
49°/50°-
10
2024
clear-day
55°/59°-
8
2023
clear-day
58°/61°-
7
2022
clear-day
62°/68°-
7
2021
cloudy
54°/55°-
9
2020
rain
52°/53°Light
8
2019
cloudy
49°/50°-
10
2018
clear-day
48°/52°-
10
2017
clear-day
46°/50°-
10
2016
cloudy
49°/50°-
10
2015
clear-day
54°/57°-
9
2014
cloudy
48°/49°-
10
2013
rain
46°/46°Light
10
2012
partly-cloudy-day
53°/54°-
9