Napa Valley Marathon

Napa, CA, USA · March 7, 2027

47°·63° high·Light·Dry

Weather

Race Day Weather

47°at start

65° high

Light

Dry

Cool start, warming finish

Runners will face a cool start at 48°F, with temperatures rising to 58°F by the finish. Winds will be light at 7 mph from the WNW, posing minimal impact on performance. With humidity at 59%, runners should maintain hydration throughout, especially as the temperature rises. The tailwind from Miles 1-6 and 8-23 will aid pacing, while crosswinds in Miles 7 and 24-27 will require focus and adjustment.

Race day forecast available in 121 days

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Distance: 26.2mi

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Race Info

The Napa Valley Marathon is an annual marathon, half marathon, and 5K in Napa County, California. The USATF-certified marathon course begins in Calistoga at the northwestern tip of Napa County, and then traverses the Silverado Trail, ending in downtown Napa. The race's course is primarily rolling hills or flat as it moves through rural California Wine Country. The Napa Valley Marathon has been run in March since 1979, accepts only about 3,000 runners, and is widely considered one of the most scenic marathons in the United States. The men's and women's winners of the race win their weight in wine. Wikipedia

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FAQ

When is the 2027 Napa Valley Marathon?

The 2027 Napa Valley Marathon will be held on Sunday March 7, 2027.

Is the Napa Valley Marathon a Boston Marathon Qualifier?

Yes, the Napa Valley Marathon is an official Boston Marathon qualifier.

What is the time limit for the Napa Valley Marathon?

The time limit for the Napa Valley Marathon is 6 hours.

What will the weather be like for the 2027 Napa Valley Marathon?

The forecast calls for a high of 67°F and a low of 47°F with a 10% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

What is the elevation profile of the Napa Valley Marathon?

The Napa Valley Marathon has 564ft of total elevation gain. View the interactive course map above for a detailed elevation profile.

Historical Weather

Based on 26 years of data

Avg Temp

59°F

L:46° H:59°

RunScore

Conditions

Rain Freq

50%

13 of 26 yrs

Wind9mph

Dew44°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Napa Valley Marathon Partly cloudy throughout the day. 2026	56°/64°	-	54°
2025 Napa Valley Marathon Partly cloudy throughout the day with morning rain. 2025	47°/58°	-	43°
2024 Napa Valley Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2024	40°/53°	Light	42°
2023 Napa Valley Marathon Partly cloudy throughout the day with rain clearing later. 2023	43°/50°	Light	37°
2022 Napa Valley Marathon Clear conditions throughout the day. 2022	39°/61°	-	39°
2020 Napa Valley Marathon Partly cloudy throughout the day. 2020	44°/60°	-	35°
2019 Napa Valley Marathon Cloudy skies throughout the day. 2019	53°/57°	Light	53°
2018 Napa Valley Marathon Partly cloudy throughout the day. 2018	33°/53°	-	38°
2017 Napa Valley Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2017	43°/48°	Light	38°
2016 Napa Valley Marathon Partly cloudy throughout the day with rain. 2016	50°/57°	Light	47°
2015 Napa Valley Marathon Clear conditions throughout the day. 2015	40°/64°	-	40°
2014 Napa Valley Marathon Partly cloudy throughout the day. 2014	54°/57°	Light	53°
2013 Napa Valley Marathon Partly cloudy throughout the day. 2013	50°/64°	-	48°
2012 Napa Valley Marathon Clear conditions throughout the day. 2012	44°/70°	-	44°
2011 Napa Valley Marathon Cloudy skies throughout the day with a chance of rain throughout the day. 2011	54°/59°	Light	53°
2010 Napa Valley Marathon Clear conditions throughout the day. 2010	45°/62°	-	45°
2009 Napa Valley Marathon Cloudy skies throughout the day with a chance of rain throughout the day. 2009	52°/55°	Light	51°
2008 Napa Valley Marathon Clear conditions throughout the day with morning rain. 2008	48°/66°	Light	27°
2007 Napa Valley Marathon Clear conditions throughout the day. 2007	48°/65°	-	46°
2006 Napa Valley Marathon Cloudy skies throughout the day with a chance of rain throughout the day. 2006	47°/50°	Moderate	43°
2005 Napa Valley Marathon Clear conditions throughout the day. 2005	46°/71°	Light	50°
2004 Napa Valley Marathon Clear conditions throughout the day with early morning rain. 2004	45°/73°	-	49°
2003 Napa Valley Marathon Clear conditions throughout the day with morning rain. 2003	39°/62°	-	42°
2002 Napa Valley Marathon Clear conditions throughout the day. 2002	40°/65°	-	39°
2001 Napa Valley Marathon Cloudy skies throughout the day with a chance of rain throughout the day. 2001	51°/54°	Light	50°
2000 Napa Valley Marathon Cloudy skies throughout the day with early morning rain. 2000	47°/48°	Light	41°

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