Race day on this page is Oct 18, 2026.
MarathonForecasts live
IRONMAN California
Sunday, October 18, 2026Sacramento, California, USA
Goal time
3:15:00
Adjusted time (preview)
About 34 m of climbing and 39 m of descent. Mostly flat.
Almost all within 2%No grades over 6%No counted climbs
Impacts
Based on the forecast, 3 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.
19°C
Feels like 19°C
Race start: 17°C → 21°C
Forecast: clear
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
8%
Wind
6.5km/h
Humidity
41%
WBGT
14.7°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 07:00
06:00
Starts 07:00
14°C
Feels 14°C
0.0 mm
0%
10.2 km/h
gust 13.2
07:00
Starts 07:00
17°C
Feels 17°C
0.0 mm
0%
5.2 km/h
gust 8.3
08:00
13.0 km
17°C
Feels 17°C
0.0 mm
0%
5.2 km/h
gust 8.2
09:00
26.0 km
19°C
Feels 19°C
0.0 mm
0%
5.4 km/h
gust 8.4
10:00
38.9 km
21°C
Feels 21°C
0.0 mm
0%
6.0 km/h
gust 9.0
11:00
Finished
23°C
Feels 23°C
0.0 mm
0%
5.9 km/h
gust 9.0
Conditions over time
18 Oct 2026 · Hover or drag to explore
41% humidityDew 4.9°CWBGT 14.7°C0.0 mm (0%)
19°CFeels 19°C
07:00-10:15
TempDewWBGTRain
6.5 km/h
gust 9.3 km/h
WindGust
Historical weather
Mean of race-window hours across the last 10 years, ±5 days around 18 October. Sticky years still count. This is not a forecast.
14°C
10 - 19°C range
Clear on average
Historical: clear
Historical average
10 years · ±5d around 18 October
2016-2025
Cloud Cover
20%
0 - 100% range
Wind
7km/h
2 - 27 km/h range • prevailing NW
Humidity
71%
33 - 95% range
WBGT
12.8°C
9.2 - 13.8°C range
Race morning history
Last 10 years, around the 07:00 start hour. Typical mid-October air averages 14°C (about 7°C to 22°C in that window). The bands are that history, not a forecast range. Hover or drag to explore.
Race-morning temperature
Most mornings
11-15°C
Almost all
10-17°C
Humidity
74%
Dew
8°C
WBGT
11°C
13°CAverage
07:00-10:18
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.
NNW
Most frequent (30%)
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.
- California International Marathon (CIM)
- Big Sur International Marathon
- Long Beach Marathon
- Los Angeles Marathon
- Mountains 2 Beach Marathon
- Napa Valley Marathon
- Rock 'n' Roll San Diego Marathon
- San Francisco Marathon
View race map for this area.
Make sense of the conditions
- Dew point, WBGT and running in the heat
Read the heat and humidity before deciding what pace makes sense.
- When drafting helps your running pace
A group can help, but its pace and the conditions still need to suit you.
- Pacing the climbs and descents
Use the course profile to think about effort, not just splits.
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 IRONMAN California.
Pacing, splits, and race-day strategy personalised to your fitness and this course.
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