Kōchi has a warm temperate climate with warm summers and mild winters.
Kōchi has an average annual temperature of 15.7°C across all 14 cities, with approximately 1990 mm of annual precipitation and average humidity of 80%. Temperatures peak in August and drop to their lowest in January, while rainfall is highest during summer months.
The warmest city is Sukumo with average July highs of 28.9°C, while Sakawa is the coldest with average January lows of -2.4°C. Humidity remains high throughout the year creating warm and humid conditions. These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
| Month | 🌤️ | Avg High | Avg Temp | Avg Low | Record High | Record Low | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|---|---|
| January | 🌤️ | 8.5°C | 5.4°C | 2.2°C | 21.7°C | -9.0°C | 80% | 61 | 3.0 | 2.60 |
| February | ⛅ | 9.6°C | 6.1°C | 2.6°C | 21.7°C | -11.0°C | 78% | 88 | 3.0 | 3.30 |
| March | ⛅ | 13.2°C | 9.3°C | 5.4°C | 22.8°C | -7.9°C | 77% | 142 | 3.0 | 4.10 |
| April | 🌧️ | 17.7°C | 13.8°C | 10.0°C | 27.0°C | -4.9°C | 77% | 171 | 2.7 | 4.90 |
| May | 🌧️ | 21.6°C | 18.0°C | 14.5°C | 32.2°C | 1.5°C | 79% | 209 | 2.4 | 5.20 |
| June | 🌧️ | 24.6°C | 21.7°C | 18.8°C | 33.2°C | 6.9°C | 84% | 291 | 2.2 | 4.60 |
| July | 🌧️ | 28.1°C | 25.4°C | 22.8°C | 37.6°C | 13.0°C | 85% | 253 | 2.1 | 5.20 |
| August | 🌧️ | 28.9°C | 26.3°C | 23.6°C | 36.4°C | 11.8°C | 84% | 213 | 2.3 | 5.20 |
| September | 🌧️ | 26.3°C | 23.5°C | 20.7°C | 33.4°C | 5.0°C | 82% | 250 | 2.4 | 4.20 |
| October | 🌧️ | 21.4°C | 18.2°C | 15.0°C | 30.1°C | -0.8°C | 79% | 153 | 2.6 | 3.50 |
| November | ⛅ | 16.3°C | 13.0°C | 9.7°C | 27.0°C | -3.9°C | 79% | 98 | 2.6 | 2.80 |
| December | 🌤️ | 10.9°C | 7.7°C | 4.5°C | 22.6°C | -7.8°C | 80% | 62 | 2.8 | 2.40 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 14 cities in Kōchi
🧥 Light layers are sufficient — this Mild Winter stays cool without prolonged hard freezes.
🌤️ Conditions are ideal for outdoor activities throughout the day in this Mild Summer.
☔ Heavy Rainfall expected — carry rain gear and plan outdoor activities around these months.
Region-wide monthly averages across 14 cities · 1981–2025 · °C
Temperatures rise steadily from spring, peak in August, and gradually decline through autumn into winter.
These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
Region-wide monthly rainfall · 1981–2025 · mm/month
💧 Humidity peaks at 85% in July · annual avg 80%
Monthly averages · 1981–2025
Across 45 years, Kōchi's temperature shows a slight warming trend over the past decade. 2024 was the warmest year overall and 1984 the coolest.
The warmest year on record was 2024 (avg: 17.2°C), while the coldest year was 1984 (avg: 14.6°C).
Averaged across all 14 cities in Kōchi · Last 30 years · °C
Averaged across all 14 cities in Kōchi · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 14 cities in Kōchi for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 | 19.8°C | 16.7°C | 13.5°C | 34.2°C | -7.8°C | 2105 | 81% | 2.5 m/s |
2024 🔥 | 20.3°C | 17.2°C | 14.0°C | 35.8°C | -5.7°C | 2404 | 82% | 2.5 m/s |
2023 | 19.7°C | 16.5°C | 13.3°C | 36.0°C | -8.7°C | 2355 | 80% | 2.4 m/s |
2022 | 19.4°C | 16.2°C | 13.0°C | 33.0°C | -7.0°C | 1670 | 80% | 2.4 m/s |
2021 | 19.4°C | 16.2°C | 13.0°C | 32.9°C | -7.8°C | 2368 | 80% | 2.6 m/s |
2020 | 19.5°C | 16.3°C | 13.0°C | 36.4°C | -5.0°C | 2205 | 80% | 2.5 m/s |
2019 | 19.6°C | 16.4°C | 13.2°C | 32.9°C | -4.3°C | 1964 | 80% | 2.5 m/s |
2018 | 19.2°C | 16.1°C | 12.9°C | 35.5°C | -8.7°C | 2357 | 81% | 2.6 m/s |
2017 | 18.9°C | 15.7°C | 12.4°C | 34.4°C | -6.2°C | 1998 | 79% | 2.5 m/s |
2016 | 19.7°C | 16.6°C | 13.5°C | 34.2°C | -8.2°C | 2327 | 81% | 2.4 m/s |
Showing 1 to 10 of 45 years
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.
