Santa Rosa Marathon

Santa Rosa, CA, USA · August 23, 2026

58°·75° high·Light·Dry

Weather

Race Day Weather

58°at start

79° high

Light

Dry

Cool start, warming finish

Runners will face a temperature rise from 58°F at the start to 78°F by the finish, with an average humidity of 67%. Winds will be light at 7 mph from the SW, with occasional gusts up to 20 mph. Runners should start conservatively and stay hydrated to manage the increasing heat.

Race day forecast available in 28 days

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

3 PM

Pre-raceRace windowPost-race

Pace Calculator

Distance: 26.2mi

Target Finish Time

0:00:00

HH:MM:SS

Pace

—

Weather Adj.

—

Common Goals:

Get forecast alerts for Santa Rosa Marathon

We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

Race Info

The Santa Rosa Marathon offers runners a scenic journey through California's renowned wine country, featuring a flat and fast course that winds through downtown Santa Rosa, along the Santa Rosa Creek Trail, and into the picturesque vineyards of west Sonoma County. A unique highlight is the route's passage through the barrel room of DeLoach Vineyards, providing a memorable experience for participants. The event fosters a festive atmosphere with a post-race celebration at Old Courthouse Square, where runners can enjoy complimentary beverages and a bottle of wine from DeLoach Vineyards.

Website

Course Map

FAQ

When is the 2026 Santa Rosa Marathon?

The 2026 Santa Rosa Marathon will be held on Sunday August 23, 2026.

What will the weather be like for the 2026 Santa Rosa Marathon?

The forecast calls for a high of 81°F and a low of 58°F with a 0% chance of rain.

Historical Weather

Based on 16 years of data

Avg Temp

77°F

L:55° H:77°

RunScore

Conditions

Rain Freq

1 of 16 yrs

Wind8mph

Dew55°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Santa Rosa Marathon Clearing in the afternoon. 2025	56°/78°	-	55°
2024 Santa Rosa Marathon Clear conditions throughout the day. 2024	50°/85°	-	52°
2023 Santa Rosa Marathon Clearing in the afternoon. 2023	55°/82°	-	54°
2022 Santa Rosa Marathon Clearing in the afternoon. 2022	56°/77°	-	54°
2021 Santa Rosa Marathon Partly cloudy throughout the day. 2021	55°/70°	-	55°
2019 Santa Rosa Marathon Clearing in the afternoon. 2019	55°/85°	-	57°
2018 Santa Rosa Marathon Partly cloudy throughout the day. 2018	53°/65°	-	53°
2017 Santa Rosa Marathon Clear conditions throughout the day. 2017	55°/93°	-	53°
2016 Santa Rosa Marathon Clearing in the afternoon. 2016	58°/76°	-	42°
2015 Santa Rosa Marathon Clearing in the afternoon with afternoon rain. 2015	60°/73°	Light	55°
2014 Santa Rosa Marathon Clearing in the afternoon. 2014	58°/75°	-	54°
2013 Santa Rosa Marathon Partly cloudy throughout the day. 2013	57°/77°	-	58°
2012 Santa Rosa Marathon Clearing in the afternoon. 2012	53°/72°	-	50°
2011 Santa Rosa Marathon Clearing in the afternoon with late afternoon rain. 2011	51°/79°	-	53°
2010 Santa Rosa Marathon Clearing in the afternoon. 2010	51°/76°	-	49°
2009 Santa Rosa Marathon Clearing in the afternoon. 2009	52°/73°	-	52°