Kielder Half Marathon

Northumberland, England, UK · October 3, 2027
partly-cloudy-day49°·52° high·Breezy·Rain possible
9
Register

Kielder Half Marathon race day weather

partly-cloudy-day
49°at start
53° high
Breezy
Rain possible
Your goal
0:00:00

Cool start — fast day potential, moderate wind, chance of rain

A cool 49°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Moderate winds around 12mph may affect pacing on open sections of the course. There's a chance of rain, so have a backup gear plan ready. High humidity (84%) will make it harder to cool down through sweat — increase fluid intake accordingly.

Race day forecast available in 316 days
partly-cloudy-day10
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9

Pace Calculator

13.1mi
0:00:00
HH:MM:SS
Pace
—

Enter a finish time to see what race day does to it.

Common Goals:

Get forecast alerts for Kielder Half Marathon

We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

About the Kielder Half Marathon

The Kielder Half Marathon is a trail half marathon on the Sunday of race weekend, starting at Kielder Dam and finishing at Kielder Waterside. The course follows paths and forest tracks in Kielder Forest around the shore of Kielder Water, the largest man-made lake in northern Europe.

Race weekend

Saturday, October 2
1:00 PM10K (6.2 mi)
1:00 PMGravel Duathlon (31.3 mi)
Sunday, October 3
10:15 AMHalf Marathon (13.1 mi)
10:45 AMJunior Osprey Run (0.9 mi)
10:45 AMJunior Falcon Run (1.6 mi)

Kielder Half Marathon FAQ

When is the 2027 Kielder Half Marathon?

The 2027 Kielder Half Marathon will be held on Sunday October 3, 2027.

What is the time limit for the Kielder Half Marathon?

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

What will the weather be like for the 2027 Kielder Half Marathon?

The forecast calls for a high of 55°F and a low of 44°F with a 17% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

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

Over the 10 years racecast.io has race-day weather for (2014 to 2026), it averaged 49°F at the start and 53°F by a typical finish. Rain fell during race hours in 2 of those years (2023 and 2024).

What was the hottest Kielder Half Marathon?

Of the 10 years on record, 2022 was the warmest, reaching 56°F during race hours. The coldest start was 2015, at 45°F.

What was the windiest Kielder Half Marathon?

Of the 10 years on record, 2025 was the windiest, with wind averaging 22 mph during race hours. The calmest was 2023, at 3 mph.

Kielder Half Marathon weather history

Based on 10 years of data
Avg Temp
51°F
L:49° H:53°
RunScore
9
Conditions
Rain Freq
20%
2 of 10 yrs
Wind10mph
Dew46°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
cloudy
50°/55°-
8
2025
partly-cloudy-day
51°/54°-
7
2024
cloudy
51°/53°Light
9
2023
partly-cloudy-day
52°/55°Light
8
2022
partly-cloudy-day
53°/56°-
8
2021
partly-cloudy-day
47°/51°-
9
2019
partly-cloudy-day
48°/50°-
9
2017
partly-cloudy-day
52°/55°-
9
2015
partly-cloudy-day
45°/50°-
10
2014
partly-cloudy-day
47°/51°-
10