Typical race-morning air at Portland Marathon averages 12°C across the last 10 years (about 6°C to 15°C in that window). The morning can still warm as you run. Use that range for planning, not as a promise for race day.
MarathonForecasts live
Portland Marathon
Sunday, October 4, 2026Portland, Oregon, USA
Goal time
3:15:00
Adjusted time (preview)
About 317 m of climbing and 322 m of descent. Hilly.
72% within 2%2% over 6%10 climbs
Impacts
Based on the forecast, 14 days out.
Elevation
Heat
Wind
Total Impact
Race Pass: personalised finish time, adjusted splits, and your race-day pacing plan.
Race Day Forecast
The live outlook for this start.
17°C
Feels like 17°C
Race start: 12°C → 20°C
Forecast: clear, with moderate winds
Race Day Pacing
Personalized pacing with weather-adjusted strategy tailored to your fitness level.
Race Pass turns this into your personalised split plan, paced for this course and forecast
Live forecast, route, and elevation
Cloud Cover
0%
Wind
10.6km/h
Humidity
32%
WBGT
12.4°C
Race Day Pacing
Personalized pacing with weather-adjusted strategy tailored to your fitness level.
Race Pass turns this into your personalised split plan, paced for this course and forecast
Live forecast, route, and elevation
Race Timeline
Race starts 07:15
07:00
Starts 07:15
12°C
Feels 12°C
0.0 mm
11%
7.0 km/h
gust 12.6
08:00
9.7 km
13°C
Feels 13°C
0.0 mm
14%
6.8 km/h
gust 14.4
09:00
22.7 km
15°C
Feels 15°C
0.0 mm
17%
8.4 km/h
gust 18.4
10:00
35.7 km
19°C
Feels 19°C
0.0 mm
21%
12.6 km/h
gust 23.8
11:00
Finished
22°C
Feels 22°C
0.0 mm
23%
15.0 km/h
gust 27.0
Conditions over time
4 Oct 2026 · Hover or drag to explore
32% humidityDew -0.5°CWBGT 12.4°C0.0 mm (17%)
17°CFeels 17°C
07:15-10:30
TempDewWBGTRain
10.6 km/h
gust 19.2 km/h
WindGust
Race morning history
Last 10 years, around the 07:15 start hour. Typical early-October air averages 12°C (about 6°C to 15°C in that window). The bands are that history, not a forecast range. Hover or drag to explore.
Race-morning temperature
Most mornings
10-13°C
Almost all
8-15°C
Humidity
89%
Dew
10°C
WBGT
10°C
12°CAverage
07:15-10:33
Almost all (90%)Most mornings (70%)AverageRain
Blue is most mornings. Dashed lines are the rare tails. Pink is the average. The bands are historical race mornings, not a forecast range. Blue columns are rain on the right scale. This assumes a 3:18. You can set your own time in the app.
Typical race-morning wind
Where the wind usually came from on race morning, not where it was going.
S
Most frequent (18%)
Wind speed
0-6 km/h
6-13 km/h
13-21 km/h
21+ km/h
A start that feels cool is not a promise about the second half.
Related races
Same city, region or country, when we can resolve them. World majors also point to each other.
- Eugene Marathon
- Eugene Half Marathon
- Anchorage Mayor's Marathon
- Asheville Marathon
- Athens Ohio Marathon
- Austin Marathon
- Back Your Badge Marathon
- Bayshore Marathon
View race map for this area.
Pacing and conditions FAQ
Beyond conditions
Conditions are only part of the race-day loss
Pacing mistakes often add several minutes, sometimes more than conditions alone, especially when the course and conditions are not ideal.
What your plan includes
Everything you need to turn this race preview into a usable race-day plan.
Personalized pacing
Effort and pace guidance tuned to this course profile.
Weather-adjusted splits
Split targets that account for heat, wind, and elevation.
Heat adaptation & drafting
Adjust for your heat tolerance and drafting preferences.
Get your personalised race plan for Portland Marathon.
Pacing, splits, and race-day strategy personalised to your fitness and this course.
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