Race-day weather · Sunday, March 7, 2027

LA Marathon weather.

27 LA 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 Mar 1, six days out.

99 Typical score
at the start The median race morning since 2000: 53°F air + 46°F dew point at 7am, across 27 race mornings at the Los Angeles International weather station. No adjustment needed.
Start · 7am9953° air · 46° dew point
+2 hours · 9am10658° air · 48° dew point
+4 hours · 11am10962° air · 47° dew point

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 dayAdjusted finish
2:456:18/mi2:45 to 2:466:18–6:19/mi0% to 0.5% slower · score 104
3:006:52/mi3:00 to 3:016:52–6:54/mi0% to 0.5% slower · score 104
3:157:26/mi3:15 to 3:167:26–7:28/mi0% to 0.5% slower · score 104
3:308:01/mi3:30 to 3:318:01–8:03/mi0% to 0.5% slower · score 104
3:458:35/mi3:45 to 3:468:35–8:37/mi0% to 0.5% slower · score 105
4:009:09/mi4:00 to 4:019:09–9:12/mi0% to 0.5% slower · score 105
4:3010:18/mi4:30 to 4:3110:18–10:21/mi0% to 0.5% slower · score 105
5:0011:27/mi5:00 to 5:0111:27–11:30/mi0% to 0.5% slower · score 105
How I’d race a typical year

Run your goal pace. The weather will cost you a few seconds in the last 10K, not the first, so bank nothing early and take water at every station after mile 10.

Get my race-week notes

How I adjust pacing, fueling and the warm-up when race morning runs warm. One email when a new training note drops. No spam, unsubscribe anytime.

Almost in. Check your inbox to confirm your email.

LA Marathon weather history: every race morning since 2000

Every row in the table below is a measurement from the Los Angeles International weather station, taken nearest 7am (today’s first-wave start) and again three hours later. Start times have moved over the years, so treat 7am as a clock time, not always the gun. Across 27 race mornings:

  • A typical 7am reading is 53°F with a 46°F dew point, a combined score of 99.
  • The warmest was 2015: 71°F with a 38°F dew point at 7am, a score of 109.
  • The most humid was 2017, with a 55°F dew point.
  • The coldest was 2018, at 47°F.
  • On 12 of 27 race mornings the 7am score was above 100, enough to call for a pace adjustment. Three hours later, 17 of 27 were.
  • The weather changed the race itself in 2026 (optional mile 18 finish offered for heat) and 2015 (start moved 30 minutes earlier for heat).
  • The windiest start was 2000: ENE wind at 13 mph.
  • Rain fell in the first 5 hours on 3 of 27 race mornings. The most rain measured was 0.91 inches, in 2000.
LA Marathon weather by year · air / dew point (°F), combined score, wind and rain
YearDateAir / dew at 7amScoreAir / dew at 10amScoreWind at 7amRain
2026Mar 8Optional mile 18 finish offered for heat64° / 21°8576° / 23°99CalmDry
2025Mar 1648° / 43°9157° / 43°100CalmDry
2024Mar 1750° / 45°9559° / 50°109E 5 mphDry
2023Mar 1959° / 47°10659° / 53°112S 6 mphLight rain
2022Mar 2055° / 51°10663° / 47°110W 10 mphDry
2021Nov 757° / 53°11060° / 53°113CalmDry
2020Mar 853° / 47°10060° / 47°107NNE 3 mphDry
2019Mar 2454° / 51°10561° / 52°113CalmDry
2018Mar 1847° / 41°8855° / 44°99NE 6 mphDry
2017Mar 1956° / 55°11160° / 55°115CalmDry
2016Feb 1450° / 48°9857° / 56°1133 mphDry
2015Mar 15Start moved 30 minutes earlier for heat71° / 38°10977° / 40°117NE 6 mphDry
2014Mar 962° / 29°9171° / 29°100CalmDry
2013Mar 1755° / 49°10458° / 51°109CalmDry
2012Mar 1847° / 39°8650° / 35°85NNE 3 mphDry
2011Mar 2055° / 39°9454° / 46°100SE 12 mph0.59 in
2010Mar 2152° / 50°10262° / 50°112CalmDry
2009May 2560° / 52°11262° / 52°114W 5 mphDry
2008Mar 250° / 46°9660° / 48°108ENE 5 mphDry
2007Mar 457° / 21°7871° / 16°87ENE 7 mphDry
2006Mar 1949° / 39°8856° / 43°99CalmDry
2005Mar 653° / 53°10661° / 56°117ENE 7 mphDry
2004Mar 757° / 49°10677° / 47°124CalmDry
2003Mar 249° / 46°9561° / 45°106E 5 mphDry
2002Mar 351° / 17°6864° / 17°81CalmDry
2001Mar 453° / 48°10157° / 47°104E 9 mphDry
2000Mar 548° / 46°9550° / 47°97ENE 13 mph0.91 in

Readings from the Los Angeles International 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 7am. 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.

Want the next one built around you?

A forecast adjusts a pace. It doesn't know your training, how you handle heat, or how your last long run went. I write every plan by hand and set race-week pacing with each athlete. It starts with a free 20-minute call.

Book a free intro call

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, 202666Forecast at the startNo adjustment needed Detroit MarathonSunday, October 18, 202673Forecast 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 Boston MarathonMonday, April 19, 202784Typical startNo adjustment needed Grandma's MarathonSaturday, June 19, 2027112Typical startSlight penalty: 0.5% to 1% slower

All race-day weather pages

RunFitCoach is not affiliated with the ASICS Los Angeles Marathon or its organizers. Observations from the Los Angeles International ASOS station (NOAA/FAA) via the Iowa Environmental Mesonet. Data updated Thursday, October 15, 2026.

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

Free intro call, twenty minutes. No payment until we both say yes.

Book your intro call
Prefer to apply in writing? Start here