Chelmsford Marathon

Chelmsford, England, UK · October 11, 2026
partly-cloudy-day50°·58° high·Breezy·Dry
7
Register

Race Day Weather

partly-cloudy-day
50°at start
58° high
Breezy
Dry

Cool conditions, wind adjustments needed

Runners will face a temperature range from 49°F to 59°F, with humidity at 71%. Wind will be a factor, starting as a headwind in miles 1-4 and again in miles 7-10, so pacing adjustments will be crucial early on. A tailwind will assist in miles 13-14 and 21-27, providing opportunities for faster splits. Hydration should be prioritized given the humidity, especially in the later miles.

partly-cloudy-night7
partly-cloudy-day7
partly-cloudy-day7
partly-cloudy-day7
partly-cloudy-day7
partly-cloudy-day7
partly-cloudy-day7
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day8

Pace Calculator

Distance: 26.2mi
0:00:00
HH:MM:SS
Pace
—
Weather Adj.
—
Common Goals:

Get forecast alerts for Chelmsford 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 Chelmsford Marathon is a single-lap road race that starts and finishes in Central Park, Chelmsford, Essex, running through the park's tree-lined avenues and out into the surrounding Essex countryside. A half marathon runs an out-and-back course on the same morning, starting half an hour after the marathon's 9:00 AM gun. The race has run each October since at least 2016 and raises funds for Little Havens Children's Hospice.

FAQ

When is the 2026 Chelmsford Marathon?

The 2026 Chelmsford Marathon will be held on Sunday October 11, 2026.

Is the Chelmsford Marathon a Boston Marathon Qualifier?

Yes, the Chelmsford Marathon is an official Boston Marathon qualifier.

What is the time limit for the Chelmsford Marathon?

The time limit for the Chelmsford Marathon is 6 hours.

What will the weather be like for the 2026 Chelmsford Marathon?

The forecast calls for a high of 58°F and a low of 46°F with a 10% chance of rain.

Historical Weather

Based on 11 years of data
Avg Temp
58°F
L:52° H:59°
RunScore
8
Conditions
Rain Freq
55%
6 of 11 yrs
Wind11mph
Dew48°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
cloudy
50°/60°-
9
2024
clear-day
44°/50°-
8
2023
clear-day
41°/49°-
8
2022
clear-day
52°/60°-
9
2021
partly-cloudy-day
53°/60°Light
8
2019
partly-cloudy-day
57°/62°Light
7
2018
cloudy
54°/58°Light
8
2017
clear-day
57°/67°Light
7
2016
cloudy
54°/61°Light
7
2015
partly-cloudy-day
50°/56°-
9
2014
partly-cloudy-day
61°/65°Light
6