Juneau Marathon weather.
Typically 14°C on race morning; rain in 3 of the last 10 years. Race morning (07:00 to 11:00 local time) in Douglas on race day in each of the last 10 years; the 2027 race is on 31 Jul 2027.
- Typical
- 14°C (57°F)
- race-morning average
- Coolest
- 10°C (50°F)
- lowest reading, 07:00–11:00
- Warmest
- 23°C (73°F)
- highest reading, 07:00–11:00
- Wet years
- 3 of 10
- rain, drizzle or worse
- Humidity
- 86%
- typical
- Wind
- 7 km/h
- typical, at 10 m
Race morning, 07:00–11:00
Year by year
| Race day | Average | Low–high | Humidity | Wind | Rain | Conditions |
|---|---|---|---|---|---|---|
| 1 Aug 2026 | 13°C (55°F) | 11°C (53°F)–15°C (58°F) | 93% | 7 km/h | 0.0 mm | Overcast |
| 2 Aug 2025 | 14°C (56°F) | 11°C (52°F)–16°C (60°F) | 80% | 7 km/h | 0.0 mm | Clear |
| 3 Aug 2024 | 12°C (54°F) | 10°C (51°F)–14°C (57°F) | 86% | 6 km/h | 0.0 mm | Overcast |
| 29 Jul 2023 | 17°C (62°F) | 16°C (60°F)–19°C (66°F) | 79% | 7 km/h | 0.0 mm | Clear |
| 30 Jul 2022 | 15°C (58°F) | 15°C (58°F)–15°C (59°F) | 98% | 7 km/h | 1.2 mm | Light drizzle |
| 31 Jul 2021 | 20°C (68°F) | 16°C (62°F)–23°C (73°F) | 74% | 5 km/h | 0.0 mm | Clear |
| 1 Aug 2020 | 16°C (60°F) | 15°C (60°F)–17°C (62°F) | 89% | 13 km/h | 0.2 mm | Light drizzle |
| 3 Aug 2019 | 14°C (58°F) | 13°C (55°F)–16°C (61°F) | 87% | 6 km/h | 0.0 mm | Partly cloudy |
| 28 Jul 2018 | 14°C (58°F) | 14°C (56°F)–16°C (60°F) | 88% | 8 km/h | 0.0 mm | Overcast |
| 29 Jul 2017 | 12°C (54°F) | 12°C (53°F)–13°C (55°F) | 83% | 5 km/h | 1.8 mm | Light drizzle |
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 12:00.
Kit and pacing
What it means
Mild: start a touch conservatively
Around 14°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.
Have a warm-day plan
In the warmest of these years it reached 23°C by late morning. Decide in advance how much you'd slow down if the forecast is warm, rather than on the course.
Be ready for rain
It rained on 3 of the last 10 race mornings. A bin bag or cheap poncho keeps you dry in the start pen; anti-chafe balm and socks that don't hold water help over the distance, and a cap keeps rain out of your eyes.
The weather varies a lot
Race mornings here have ranged by 8°C from year to year. Pack for both, and settle your kit and pacing from the forecast in the last few days.
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).