Mt. Umunhum Trail Marathon

San Jose, CA, USA • February 7, 2026

Race Day Weather

52°

65° high

Breezy

Dry

Cool and comfortable, hydrate wisely

Runners will face a temperature range from 52°F to 65°F, with 81% humidity and a dew point of 51°F. Winds will be light at 7 mph from the SW, providing minimal impact. Given the humidity, it's advisable for runners to adjust their pace conservatively and prioritize hydration throughout the race.

5 AM

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10 AM

11 AM

12 PM

1 PM

2 PM

3 PM

Pre-raceRace windowPost-race

Course Map

FAQ

When is the 2026 Mt. Umunhum Trail Marathon?

The 2026 Mt. Umunhum Trail Marathon will be held on Saturday February 7, 2026.

Is the Mt. Umunhum Trail Marathon a Boston Marathon Qualifier?

No, the Mt. Umunhum Trail Marathon is NOT a Boston Marathon qualifier.

Historical Weather

Based on 4 years of data

Avg Temp

61°F

L:48° H:61°

RunScore

Conditions

Rain Freq

0 of 4 yrs

Wind9mph

Dew45°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Mt. Umunhum Trail Marathon Cloudy skies throughout the day with morning rain. 2025	55°/61°	-	50°
2024 Mt. Umunhum Trail Marathon Cloudy skies throughout the day with late afternoon rain. 2024	48°/58°	-	41°
2023 Mt. Umunhum Trail Marathon Cloudy skies throughout the day with rain. 2023	49°/65°	-	49°
2022 Mt. Umunhum Trail Marathon Partly cloudy throughout the day. 2022	41°/62°	-	37°