Typical race-morning air at RUN Barnstaple Marathon averages 15°C across the last 10 years (about 10°C to 19°C in that window). The morning can still warm as you run. Use that range for planning, not as a promise for race day.
MarathonForecasts live
RUN Barnstaple Marathon
Sunday, September 27, 2026Barnstaple, Devon, UK
Goal time
3:15:00
Adjusted time (preview)
About 52 m of climbing and 52 m of descent. Mostly flat.
Almost all within 2%No grades over 6%Two climbs
Impacts
Based on the forecast, 6 days out.
Elevation
Heat
Wind
Total Impact
Race Pass: personalised finish time, adjusted splits, and your race-day pacing plan.
Race Day Forecast
The live outlook for this start.
17°C
Feels like 17°C
Race start: 16°C → 18°C
Forecast: mostly cloudy, with rain likely, with moderate winds
Race Day Pacing
Personalized pacing with weather-adjusted strategy tailored to your fitness level.
Race Pass turns this into your personalised split plan, paced for this course and forecast
Live forecast, route, and elevation
Cloud Cover
51%
Wind
16.5km/h
Humidity
86%
WBGT
15.7°C
Race Day Pacing
Personalized pacing with weather-adjusted strategy tailored to your fitness level.
Race Pass turns this into your personalised split plan, paced for this course and forecast
Live forecast, route, and elevation
Race Timeline
Race starts 09:00
08:00
Starts 09:00
12°C
Feels 12°C
0.0 mm
0%
11.3 km/h
gust 14.3
09:00
Starts 09:00
16°C
Feels 16°C
0.1 mm
46%
11.9 km/h
gust 25.6
10:00
13.0 km
17°C
Feels 17°C
0.0 mm
58%
15.8 km/h
gust 30.2
11:00
26.0 km
18°C
Feels 18°C
0.1 mm
56%
19.0 km/h
gust 38.7
12:00
38.9 km
18°C
Feels 18°C
0.1 mm
56%
19.5 km/h
gust 39.0
13:00
Finished
18°C
Feels 18°C
0.1 mm
57%
19.3 km/h
gust 40.0
Conditions over time
27 Sept 2026 · Hover or drag to explore
86% humidityDew 14.3°CWBGT 15.7°C0.1 mm (54%)
17°CFeels 17°C
09:00-12:15
TempDewWBGTRain
16.5 km/h
gust 31.3 km/h
WindGust
Race morning history
Last 10 years, around the 09:00 start hour. Typical late-September air averages 15°C (about 10°C to 19°C in that window). The bands are that history, not a forecast range. Hover or drag to explore.
Race-morning temperature
Most mornings
13-16°C
Almost all
12-18°C
Humidity
80%
Dew
11°C
WBGT
12°C
Rain
0.0 mm/h
15°CAverage
09:00-12:18
Almost all (90%)Most mornings (70%)AverageRain
Blue is most mornings. Dashed lines are the rare tails. Pink is the average. The bands are historical race mornings, not a forecast range. Blue columns are rain on the right scale. This assumes a 3:18. You can set your own time in the app.
Typical race-morning wind
Where the wind usually came from on race morning, not where it was going.
SE
Most frequent (20%)
Wind speed
0-6 km/h
6-13 km/h
13-21 km/h
21+ km/h
A start that feels cool is not a promise about the second half.
Related races
Same city, region or country, when we can resolve them. World majors also point to each other.
- Abingdon Marathon
- ABP Newport Marathon
- Belfast City Marathon
- Blackpool Festival Marathon
- Brighton Marathon
- Chester Marathon
- Edinburgh Marathon
- Great Welsh Marathon
View race map for this area.
Pacing and conditions FAQ
Beyond conditions
Conditions are only part of the race-day loss
Pacing mistakes often add several minutes, sometimes more than conditions alone, especially when the course and conditions are not ideal.
What your plan includes
Everything you need to turn this race preview into a usable race-day plan.
Personalized pacing
Effort and pace guidance tuned to this course profile.
Weather-adjusted splits
Split targets that account for heat, wind, and elevation.
Heat adaptation & drafting
Adjust for your heat tolerance and drafting preferences.
Get your personalised race plan for RUN Barnstaple Marathon.
Pacing, splits, and race-day strategy personalised to your fitness and this course.
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