America's Finest City Half Marathon weather.
Typically 22°C on race morning; rain in 1 of the last 10 years. Race morning (07:00 to 11:00 local time) in San Diego on race day in each of the last 10 years; the 2027 race is on 15 Aug 2027.
- Typical
- 22°C (72°F)
- race-morning average
- Coolest
- 18°C (64°F)
- lowest reading, 07:00–11:00
- Warmest
- 27°C (81°F)
- highest reading, 07:00–11:00
- Wet years
- 1 of 10
- rain, drizzle or worse
- Humidity
- 70%
- 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 |
|---|---|---|---|---|---|---|
| 16 Aug 2026 | 23°C (74°F) | 21°C (70°F)–25°C (77°F) | 69% | 9 km/h | 0.0 mm | Clear |
| 17 Aug 2025 | 21°C (69°F) | 18°C (64°F)–23°C (73°F) | 69% | 7 km/h | 0.0 mm | Mainly clear |
| 18 Aug 2024 | 22°C (71°F) | 18°C (65°F)–25°C (76°F) | 70% | 7 km/h | 0.0 mm | Clear |
| 13 Aug 2023 | 22°C (72°F) | 20°C (68°F)–24°C (75°F) | 70% | 11 km/h | 0.0 mm | Overcast |
| 14 Aug 2022 | 24°C (75°F) | 22°C (71°F)–25°C (78°F) | 72% | 11 km/h | 0.0 mm | Clear |
| 15 Aug 2021 | 23°C (73°F) | 20°C (68°F)–24°C (75°F) | 73% | 9 km/h | 0.0 mm | Mainly clear |
| 16 Aug 2020 | 25°C (77°F) | 23°C (74°F)–26°C (79°F) | 63% | 15 km/h | 0.0 mm | Overcast |
| 18 Aug 2019 | 20°C (69°F) | 18°C (65°F)–22°C (72°F) | 69% | 8 km/h | 0.0 mm | Partly cloudy |
| 12 Aug 2018 | 25°C (77°F) | 23°C (74°F)–27°C (80°F) | 75% | 11 km/h | 0.2 mm | Light drizzle |
| 13 Aug 2017 | 21°C (70°F) | 19°C (66°F)–24°C (75°F) | 75% | 7 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. The half marathon starts at 06:15.
Kit and pacing
What it means
Warm: adjust your goal pace
Around 22°C on race morning costs most runners time. Plan to run a few seconds per kilometer slower than in cool weather, take on fluid and salt at every station, and wear light colors and sun cream.
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).