Osaka Half Marathon weather.
Typically 5°C on race morning; dry every year. Race morning (07:00 to 11:00 local time) in Osaka on race day in each of the last 10 years; the 2027 race is on 31 Jan 2027.
- Typical
- 5°C (41°F)
- race-morning average
- Coolest
- -3°C (27°F)
- lowest reading, 07:00–11:00
- Warmest
- 10°C (50°F)
- highest reading, 07:00–11:00
- Wet years
- 0 of 10
- rain, drizzle or worse
- Humidity
- 74%
- typical
- Wind
- 9 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 Feb 2026 | 4°C (40°F) | 1°C (33°F)–7°C (44°F) | 59% | 9 km/h | 0.0 mm | Clear |
| 2 Feb 2025 | 6°C (43°F) | 5°C (40°F)–9°C (47°F) | 86% | 9 km/h | 0.3 mm | Overcast |
| 28 Jan 2024 | 3°C (37°F) | -2°C (28°F)–8°C (46°F) | 85% | 6 km/h | 0.0 mm | Mainly clear |
| 29 Jan 2023 | 2°C (35°F) | -2°C (29°F)–5°C (42°F) | 72% | 13 km/h | 0.0 mm | Clear |
| 30 Jan 2022 | 5°C (41°F) | 3°C (37°F)–7°C (45°F) | 70% | 10 km/h | 0.0 mm | Overcast |
| 31 Jan 2021 | 6°C (42°F) | 3°C (37°F)–9°C (48°F) | 73% | 3 km/h | 0.0 mm | Overcast |
| 2 Feb 2020 | 5°C (41°F) | 2°C (35°F)–9°C (47°F) | 76% | 6 km/h | 0.0 mm | Mainly clear |
| 3 Feb 2019 | 4°C (39°F) | -1°C (31°F)–9°C (48°F) | 78% | 10 km/h | 0.0 mm | Clear |
| 28 Jan 2018 | 0°C (32°F) | -3°C (27°F)–3°C (37°F) | 75% | 8 km/h | 0.0 mm | Overcast |
| 29 Jan 2017 | 5°C (42°F) | 1°C (33°F)–10°C (50°F) | 74% | 9 km/h | 0.0 mm | Overcast |
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.
Kit and pacing
What it means
Good racing weather
Around 5°C is close to ideal for a fast time. Shorts and a vest are enough once you're moving; bring a throwaway layer for the wait in the start pen.
It can be cold
The coolest morning here dropped to -3°C. Pack gloves and a throwaway layer even if the forecast looks kind.
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).