Lake Chabot Trail Run weather.
Typically 13°C on race morning; rain in 1 of the last 10 years. Race morning (07:00 to 11:00 local time) in Castro Valley on race day in each of the last 10 years; the 2026 race is on 7 Nov 2026.
- Typical
- 13°C (55°F)
- race-morning average
- Coolest
- 4°C (39°F)
- lowest reading, 07:00–11:00
- Warmest
- 18°C (64°F)
- highest reading, 07:00–11:00
- Wet years
- 1 of 10
- rain, drizzle or worse
- Humidity
- 91%
- typical
- Wind
- 4 km/h
- typical, at 10 m
Race morning, 07:00–11:00
Year by year
| Race day | Average | Low–high | Humidity | Wind | Rain | Conditions |
|---|---|---|---|---|---|---|
| 8 Nov 2025 | 13°C (56°F) | 10°C (50°F)–18°C (64°F) | 85% | 2 km/h | 0.0 mm | Clear |
| 9 Nov 2024 | 11°C (51°F) | 7°C (44°F)–16°C (60°F) | 50% | 3 km/h | 0.0 mm | Mainly clear |
| 4 Nov 2023 | 15°C (60°F) | 14°C (57°F)–17°C (63°F) | 93% | 4 km/h | 0.0 mm | Overcast |
| 5 Nov 2022 | 13°C (55°F) | 12°C (54°F)–14°C (56°F) | 95% | 7 km/h | 0.1 mm | Overcast |
| 6 Nov 2021 | 13°C (56°F) | 12°C (54°F)–14°C (57°F) | 91% | 4 km/h | 0.2 mm | Overcast |
| 7 Nov 2020 | 10°C (49°F) | 8°C (46°F)–12°C (54°F) | 80% | 8 km/h | 0.0 mm | Clear |
| 9 Nov 2019 | 11°C (51°F) | 9°C (48°F)–13°C (55°F) | 92% | 5 km/h | 0.0 mm | Overcast |
| 10 Nov 2018 | 10°C (49°F) | 4°C (40°F)–17°C (62°F) | 30% | 6 km/h | 0.0 mm | Clear |
| 4 Nov 2017 | 13°C (56°F) | 13°C (55°F)–13°C (56°F) | 91% | 8 km/h | 4.9 mm | Heavy drizzle |
| 5 Nov 2016 | 13°C (56°F) | 11°C (52°F)–17°C (62°F) | 91% | 4 km/h | 0.0 mm | Partly cloudy |
Each row is the race's date that year where we know it, else the same weekday nearest its usual date. Temperatures and humidity are averaged over 07:00 to 11:00 local time, rain is the total over those hours, and conditions are the commonest over the morning. The marathon starts at 08:30.
Kit and pacing
What it means
Mild: start a touch conservatively
Around 13°C feels fine at the start but warms up by the second half. Drink from the early stations rather than waiting until you're thirsty, and wear the lightest kit you have.
General guidance from past years' numbers. Check the forecast in race week.
Weather data by Open-Meteo.com, from its historical weather archive (CC BY 4.0).