Race-day weather · Sunday, April 18, 2027

Jersey City Marathon weather.

4 Jersey City Marathon race mornings since 2023, 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 Apr 12, six days out.

91 Typical score
at the start The median race morning since 2023: 49°F air + 42°F dew point at 7am, across 4 race mornings at the Newark Liberty International Airport weather station. No adjustment needed.
Start · 7am9149° air · 42° dew point
+2 hours · 9am9654° air · 42° dew point
+4 hours · 11am9658° air · 39° dew point

The Jersey City 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 2023, 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/miNo changescore 94
3:006:52/miNo changescore 93
3:157:26/miNo changescore 94
3:308:01/miNo changescore 94
3:458:35/miNo changescore 94
4:009:09/miNo changescore 94
4:3010:18/miNo changescore 94
5:0011:27/miNo changescore 94
How I’d race a typical year

Race the plan as written. This is the weather marathons are built for, and the only real risk is going out too fast because the first miles feel free. Hold goal pace through halfway and let the second half decide itself.

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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Jersey City Marathon weather history: every race morning since 2023

Every row in the table below is a measurement from the Newark Liberty International Airport 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 4 race mornings:

  • A typical 7am reading is 49°F with a 42°F dew point, a combined score of 91.
  • The warmest was 2023: 57°F with a 55°F dew point at 7am, a score of 112.
  • The most humid was 2023, with a 55°F dew point.
  • The coldest was 2025, at 43°F.
  • On 1 of 4 race mornings the 7am score was above 100, enough to call for a pace adjustment. Three hours later, 1 of 4 were.
  • The windiest start was 2024: WSW wind at 12 mph.
  • Rain fell in the first 5 hours on 1 of 4 race mornings (1 more saw only a trace). The most rain measured was 0.13 inches, in 2023.
Jersey City Marathon weather by year · air / dew point (°F), combined score, wind and rain
YearDateAir / dew at 7amScoreAir / dew at 10amScoreWind at 7amRain
2026Apr 1950° / 48°9853° / 40°93NE 3 mphTrace
2025Apr 1343° / 35°7849° / 37°86NNW 8 mphDry
2024Apr 1448° / 33°8161° / 34°95WSW 12 mphDry
2023Apr 2357° / 55°11258° / 54°112NNE 5 mph0.13 in

Readings from the Newark Liberty International Airport 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.

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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 Atlanta MarathonSunday, March 7, 202797Typical startNo adjustment needed Boston MarathonMonday, April 19, 202784Typical startNo adjustment needed Rock 'n' Roll Nashville MarathonSaturday, April 24, 2027111Typical startSlight penalty: 0.5% to 1% slower Eugene MarathonSunday, April 25, 202789Typical startNo adjustment needed Big Sur MarathonSunday, April 25, 202796Typical 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 OC MarathonSunday, May 2, 2027110Typical startBarely a penalty: 0% to 0.5% slower Colfax MarathonSunday, May 16, 202781Typical startNo adjustment needed Rock 'n' Roll San Diego MarathonSunday, June 6, 2027119Typical startSlight penalty: 0.5% to 1% slower 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, Rock 'n' Roll Nashville Marathon, Eugene Marathon, Big Sur Marathon, Flying Pig Marathon, Pittsburgh Marathon, OC Marathon, Colfax Marathon, Rock 'n' Roll San Diego Marathon, Grandma's Marathon, San Francisco Marathon. All race-day weather pages.

RunFitCoach is not affiliated with the The Jersey City Marathon & Half Marathon Marquee Experience at Newport or its organizers. Observations from the Newark Liberty International Airport 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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