Race-day weather · Sunday, June 6, 2027

Rock 'n' Roll San Diego Marathon weather.

26 Rock 'n' Roll San Diego Marathon race mornings since 2000, measured hour by hour: temperature, dew point, wind, rain, and what the weather cost runners. The forecast for the 2027 race goes live here on May 31, six days out.

119 Typical score
at the start The median race morning since 2000: 62°F air + 57°F dew point at 6:15am, across 26 race mornings at the San Diego International (Lindbergh Field) weather station. Slight penalty: 0.5% to 1% slower.
Start · 6:15am11962° air · 57° dew point
+2 hours · 8:15am11963° air · 56° dew point
+4 hours · 10:15am12064° air · 56° dew point

The Rock 'n' Roll San Diego Marathon course, mile by mile: the elevation, every climb, and how I’d run each stretch.

Your goal pace on a typical race morning

Built from the median race morning since 2000, averaged across the hours you’d be running. Where the weather costs time, each cell gives the adjusted finish time and the pace per mile to run instead. Six days out, the real forecast replaces it.

Goal on a cool dayStarting 6:15amStarting 6:50am
2:456:18/mi2:46 to 2:476:19–6:21/mi0.5% to 1% slower · score 1192:46 to 2:476:19–6:21/mi0.5% to 1% slower · score 119
3:006:52/mi3:01 to 3:026:54–6:56/mi0.5% to 1% slower · score 1193:01 to 3:026:54–6:56/mi0.5% to 1% slower · score 119
3:157:26/mi3:16 to 3:177:28–7:31/mi0.5% to 1% slower · score 1193:16 to 3:177:28–7:31/mi0.5% to 1% slower · score 119
3:308:01/mi3:31 to 3:328:03–8:05/mi0.5% to 1% slower · score 1193:31 to 3:328:03–8:05/mi0.5% to 1% slower · score 119
3:458:35/mi3:46 to 3:478:37–8:40/mi0.5% to 1% slower · score 1193:46 to 3:478:37–8:40/mi0.5% to 1% slower · score 119
4:009:09/mi4:01 to 4:029:12–9:15/mi0.5% to 1% slower · score 1194:01 to 4:029:12–9:15/mi0.5% to 1% slower · score 119
4:3010:18/mi4:31 to 4:3310:21–10:24/mi0.5% to 1% slower · score 1194:31 to 4:3310:21–10:24/mi0.5% to 1% slower · score 120
5:0011:27/mi5:01 to 5:0311:30–11:33/mi0.5% to 1% slower · score 1205:01 to 5:0311:30–11:33/mi0.5% to 1% slower · score 120
How I’d race a typical year

Start 2 to 3 seconds per mile slower than goal through the first 10 miles. Drink early, because by the time you feel the heat the deficit is already there, and race the last 10K on feel.

Race week, start to finish: how I’d run the three-week taper, what to take in during the race, how much to slow down in heat and humidity, and what the four weeks after should look like.

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Rock 'n' Roll San Diego Marathon weather history: every race morning since 2000

Every row in the table below is a measurement from the San Diego International (Lindbergh Field) weather station, taken nearest 6:15am (today’s first-wave start) and again three hours later. Start times have moved over the years, so treat 6:15am as a clock time, not always the gun. Across 26 race mornings:

  • A typical 6:15am reading is 62°F with a 57°F dew point, a combined score of 119.
  • The warmest was 2025: 67°F with a 64°F dew point at 6:15am, a score of 131.
  • The most humid was 2025, with a 64°F dew point.
  • The coldest was 2011, at 59°F.
  • On 26 of 26 race mornings the 6:15am score was above 100, enough to call for a pace adjustment. Three hours later, 26 of 26 were.
  • The windiest start was 2005: S wind at 9 mph.
  • Rain fell in the first 5 hours on 1 of 26 race mornings.
Rock 'n' Roll San Diego Marathon weather by year · air / dew point (°F), combined score, wind and rain
YearDateAir / dew at 6:15amScoreAir / dew at 9:15amScoreWind at 6:15amRain
2026May 3162° / 57°11963° / 57°120SW 5 mphDry
2025Jun 167° / 64°13170° / 64°134CalmLight rain
2024Jun 261° / 55°11662° / 54°116WSW 3 mphDry
2023Jun 462° / 55°11763° / 56°119NW 5 mphDry
2022Jun 562° / 56°11864° / 56°120WSW 3 mphDry
2021Oct 2463° / 52°11564° / 52°116E 3 mphDry
2020–Cancelled (COVID-19)
2019Jun 261° / 51°11262° / 52°114SSW 6 mphDry
2018Jun 363° / 57°12068° / 57°125N 3 mphDry
2017Jun 462° / 59°12163° / 59°122W 3 mphDry
2016Jun 563° / 59°12264° / 59°123NNE 3 mphDry
2015May 3166° / 56°12263° / 56°119CalmDry
2014Jun 164° / 58°12267° / 57°124CalmDry
2013Jun 263° / 57°12063° / 57°120SSW 6 mphDry
2012Jun 362° / 55°11762° / 56°118CalmDry
2011Jun 559° / 50°10966° / 49°115CalmDry
2010Jun 663° / 58°12166° / 59°125NNW 3 mphDry
2009May 3159° / 57°11662° / 57°119WNW 6 mphDry
2008Jun 162° / 51°11363° / 52°115NNW 5 mphDry
2007Jun 360° / 52°11262° / 52°1143 mphDry
2006Jun 464° / 61°12564° / 59°123CalmDry
2005Jun 564° / 53°11764° / 56°120S 9 mphDry
2004Jun 664° / 56°12066° / 55°121SE 8 mphDry
2003Jun 161° / 57°11861° / 57°1183 mphDry
2002Jun 262° / 53°11562° / 53°115SSW 5 mphDry
2001Jun 363° / 57°12063° / 56°119W 8 mphDry
2000Jun 463° / 59°12269° / 58°127N 6 mphDry

Readings from the San Diego International (Lindbergh Field) ASOS weather station (NOAA/FAA, via the Iowa Environmental Mesonet), the observation nearest each hour. Scores above 100 call for a pace adjustment. Rain is the total the station measured in the 5 hours after 6:15am. Download every hour as a CSV.

How the score works

Add the air temperature to the dew point, both in Fahrenheit. That combined score is closer to what your body feels than the temperature alone, because dew point decides whether your sweat can evaporate, and evaporating sweat is how you shed heat at race pace. The bands below are the same ones my heat pace calculator uses, and that page has the full chart and the physiology behind it.

Combined score → how much to slow down
  • 100 or lessNo pace adjustment
  • 101 – 1100% to 0.5% slower
  • 111 – 1200.5% to 1% slower
  • 121 – 1301% to 2% slower
  • 131 – 1402% to 3% slower
  • 141 – 1503% to 4.5% slower
  • 151 – 1604.5% to 6% slower
  • 161 – 1706% to 8% slower
  • 171 – 1808% to 10% slower
  • Above 180Hard running is not recommended

The bands are a coach's rule of thumb, not a lab measurement. Treat each range as a starting point and let effort make the final call.

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Other race-day weather pages

Twin Cities MarathonSunday, October 4, 202695Race day at the startNo adjustment needed Chicago MarathonSunday, October 11, 2026113Race day at the startSlight penalty: 0.5% to 1% slower Columbus MarathonSunday, October 18, 202664Forecast at the startNo adjustment needed Detroit MarathonSunday, October 18, 202672Forecast at the startNo adjustment needed Marine Corps MarathonSunday, October 25, 202694Typical startNo adjustment needed NYC MarathonSunday, November 1, 202683Typical startNo adjustment needed Philadelphia MarathonSunday, November 22, 202673Typical startNo adjustment needed California International MarathonSunday, December 6, 202683Typical startNo adjustment needed Honolulu MarathonSunday, December 13, 2026136Typical startReal penalty: 2% to 3% slower Houston MarathonSunday, January 17, 202784Typical startNo adjustment needed LA MarathonSunday, March 7, 202799Typical startNo adjustment needed Boston MarathonMonday, April 19, 202784Typical startNo adjustment needed Eugene MarathonSunday, April 25, 202789Typical startNo adjustment needed Flying Pig MarathonSunday, May 2, 2027102Typical startBarely a penalty: 0% to 0.5% slower Pittsburgh MarathonSunday, May 2, 202799Typical startNo adjustment needed Grandma's MarathonSaturday, June 19, 2027112Typical startSlight penalty: 0.5% to 1% slower San Francisco MarathonSunday, July 25, 2027109Typical startBarely a penalty: 0% to 0.5% slower

Course guides, mile by mile: Twin Cities Marathon, Chicago Marathon, Columbus Marathon, Detroit Marathon, Marine Corps Marathon, NYC Marathon, Philadelphia Marathon, California International Marathon, Honolulu Marathon, Houston Marathon, LA Marathon, Boston Marathon, Eugene Marathon, Flying Pig Marathon, Pittsburgh Marathon, Grandma's Marathon, San Francisco Marathon. All race-day weather pages.

RunFitCoach is not affiliated with the Rock 'n' Roll San Diego Marathon or its organizers. Observations from the San Diego International (Lindbergh Field) ASOS station (NOAA/FAA) via the Iowa Environmental Mesonet. Data updated Saturday, October 17, 2026.

Heat is one variable. I plan for all of them.

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