Weather
Climate Avg| Time | Temp | Dew Pt | Humidity | Wind | Conditions |
|---|---|---|---|---|---|
| Start | 41.2 – 41.2°F | 35° Crisp | 79 – 79% | 6 mph N | Partly cloudy |
| 8:00 AM | 40.9 – 40.9°F | 34° Crisp | 78 – 78% | 5 mph N | Partly cloudy |
| 9:00 AM | 31.6 – 40.7°F | 33° Crisp | 75 – 97% | 5 mph E | Partly cloudy |
| 10:00 AM | 35.4 – 39°F | 35° Crisp | 85 – 95% | 3 mph SE | Partly cloudy |
| 11:00 AM | 37.4 – 39.7°F | 35° Crisp | 83 – 91% | 3 mph SW | Partly cloudy |
| Finish | 39.3 – 40.5°F | 36° Crisp | 82 – 87% | 4 mph SW | Partly cloudy |
Based on 3-year average for this date. Real forecast available in 120 days.
Elevation Profile
Course Stats
Mile Splits
| Mile | Grade |
|---|---|
| 1 | -0.9% |
| 2 | +2.1% |
| 3 | -0.1% |
| 4 | -0.1% |
| 5 | -0.3% |
| 6 | -1.7% |
| 7 | +0.2% |
| 8 | +0.2% |
| 9 | -0.7% |
| 10 | +0.1% |
| 11 | +0.3% |
| 12 | +0.5% |
| 13 | +0.5% |
| 14 | -0.4% |
| 15 | -0.5% |
| 16 | -0.3% |
| 17 | +0.4% |
| 18 | -0.5% |
| 19 | +0.3% |
| 20 | +0.3% |
| 21 | -0.6% |
| 22 | +0.4% |
| 23 | -0.5% |
| 24 | +0.0% |
| 25 | +0.1% |
| 26 | -0.2% |
| 27 | +0.0% |
RM Difficulty Index
Race-Day Weather History
Race-morning conditions on this date over the past 6 years: median 37°F with a 33°F dew point and 5 mph wind. Heat has rarely been a factor.
| Year | Temp | Dew Pt | Wind | Rain | Sky |
|---|---|---|---|---|---|
| 2025 | 41°F | 34°F | 5 mph | — | Partly cloudy |
| 2024 | 39°F | 36°F | 5 mph | — | Partly cloudy |
| 2023 | 33°F | 32°F | 3 mph | — | Partly cloudy |
| 2022 | 34°F | 27°F | 6 mph | — | Snow |
| 2020 | 39°F | 34°F | 2 mph | — | Partly cloudy |
| 2019 | 31°F | 23°F | 5 mph | — | Clear |
Morning conditions (race window) on the Seattle Marathon calendar date each year, from the ERA5 reanalysis archive — the race’s usual slot, not necessarily each edition’s exact day.
Seattle Marathon Pace Calculator & Race Plan
Seattle is a hilly marathon with 193 meters of gain, including climbs through neighborhoods and along the waterfront. Late November weather means rain is likely and temperatures in the 40s.
The hills are scattered throughout the course rather than concentrated in one section, so you need a plan that adjusts effort on every climb rather than just "survive the big hill." Our model handles this mile by mile.
Seattle Marathon FAQ
When is the next Seattle Marathon?›
The next Seattle Marathon is on Sunday, November 29, 2026.
How long is the Seattle Marathon?›
The Seattle Marathon is 26.2 miles (42.195 km), the standard marathon distance. It runs in Seattle, WA.
How much elevation gain does the Seattle Marathon have?›
The Seattle Marathon has about 632 ft (193 m) of climbing and 710 ft of descent, with a maximum grade of 2.14%.
Is the Seattle Marathon flat, downhill, or hilly?›
The Seattle Marathon is a net downhill course, dropping 79 ft (24 m) from start to finish, with 632 ft of climbing along the way.
How hard is the Seattle Marathon?›
Runner's Math scores the Seattle Marathon 37/100 (Moderate) — #15 of 38 marathon courses in our library, ranked by modeled time cost. The profile costs about 0:55 versus a flat course for a runner at 4:00-marathon pace.
What's the weather usually like at the Seattle Marathon?›
Over the past 6 years on this date, median race-morning conditions were 37°F with a 33°F dew point and 5 mph wind. Heat has rarely been a factor.