Jacksonville Half Marathon

Jacksonville, FL, USA · December 12, 2026·
partly-cloudy-day55°·58° high·Breezy·Dry
8
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Jacksonville Half Marathon race day weather

partly-cloudy-day
55°at start
66° high
Breezy
Dry
Your goal
0:00:00

Comfortable temps, warming through the race

Mild 55°F temps at gun time mean comfortable early miles without overheating risk. Temperatures rising to 66°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. Moderate humidity at 76% is worth noting for effort level, especially in later miles.

Race day forecast available in 20 days
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Pace Calculator

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Race Plan

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A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

About the Jacksonville Half Marathon

The Jacksonville Half Marathon starts at The Bolles School on San Jose Boulevard and runs through Jacksonville's Mandarin neighborhood, with the return leg along the St. Johns River. The USATF-certified course is flat, with plenty of shade and no steep hills, bridges or overpasses. Runners finish on the track inside the Bolles School stadium.

Race weekend

Saturday, December 12
7:00 AMMarathon (26.2 mi)
7:00 AMHalf Marathon (13.1 mi)
7:00 AM5K (3.1 mi)

Jacksonville Half Marathon FAQ

When is the 2026 Jacksonville Half Marathon?

The 2026 Jacksonville Half Marathon will be held on Saturday December 12, 2026.

What is the time limit for the Jacksonville Half Marathon?

The time limit for the Jacksonville Half Marathon is 4 hours.

What will the weather be like for the 2026 Jacksonville Half Marathon?

The forecast calls for a high of 69°F and a low of 55°F with a 6% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

What is the weather usually like for the Jacksonville Half Marathon?

Over the 14 years racecast.io has race-day weather for (2010 to 2025), it averaged 57°F at the start and 59°F by a typical finish. Rain fell during race hours in 2 of those years (2012 and 2013).

What was the hottest Jacksonville Half Marathon?

Of the 14 years on record, 2013 was the warmest, reaching 71°F during race hours. The coldest start was 2010, at 44°F.

What was the windiest Jacksonville Half Marathon?

Of the 14 years on record, 2020 was the windiest, with wind averaging 15 mph during race hours. The calmest was 2025, at 0 mph.

Jacksonville Half Marathon weather history

Based on 14 years of data
Avg Temp
58°F
L:56° H:59°
RunScore
7
Conditions
Rain Freq
14%
2 of 14 yrs
Wind8mph
Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
partly-cloudy-night
46°/54°-
10
2024
partly-cloudy-night
59°/62°-
6
2023
partly-cloudy-night
65°/68°-
4
2022
cloudy
59°/60°-
7
2021
partly-cloudy-night
66°/69°-
4
2020
clear-night
45°/46°-
9
2018
partly-cloudy-night
53°/56°-
9
2017
cloudy
53°/55°-
10
2016
cloudy
67°/70°-
4
2014
partly-cloudy-night
61°/64°-
6
2013
cloudy
70°/71°Moderate
4
2012
rain
57°/59°Light
7
2011
clear-night
48°/49°-
9
2010
cloudy
43°/44°-
9