Aichi has a warm temperate climate with warm summers and mild winters.
Aichi has an average annual temperature of 15.0°C across all 52 cities, with approximately 1716 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 autumn months.
The warmest city is Asuke with average July highs of 29.3°C, while Toyoyama is the coldest with average January lows of -3.3°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 | 🌤️ | 7.5°C | 3.8°C | 0.2°C | 19.4°C | -12.0°C | 81% | 67 | 3.3 | 2.40 |
| February | 🌤️ | 8.5°C | 4.4°C | 0.4°C | 20.2°C | -10.9°C | 79% | 75 | 3.4 | 3.10 |
| March | ⛅ | 12.6°C | 7.8°C | 3.1°C | 22.8°C | -7.7°C | 77% | 127 | 3.2 | 4.00 |
| April | ⛅ | 17.8°C | 12.9°C | 7.9°C | 26.2°C | -4.5°C | 77% | 147 | 2.9 | 4.80 |
| May | 🌧️ | 22.1°C | 17.5°C | 12.9°C | 29.9°C | -0.9°C | 78% | 173 | 2.5 | 5.10 |
| June | 🌧️ | 25.5°C | 21.6°C | 17.8°C | 33.9°C | 6.8°C | 82% | 215 | 2.1 | 4.80 |
| July | 🌧️ | 29.0°C | 25.6°C | 22.2°C | 38.7°C | 13.0°C | 84% | 214 | 2.0 | 4.90 |
| August | 🌧️ | 30.2°C | 26.8°C | 23.3°C | 39.5°C | 12.1°C | 82% | 163 | 2.1 | 5.10 |
| September | 🌧️ | 27.1°C | 23.5°C | 19.9°C | 34.0°C | 6.5°C | 82% | 218 | 2.3 | 4.00 |
| October | 🌧️ | 21.7°C | 17.6°C | 13.6°C | 30.5°C | 0.1°C | 80% | 156 | 2.4 | 3.30 |
| November | ⛅ | 16.1°C | 11.9°C | 7.7°C | 25.6°C | -3.4°C | 80% | 92 | 2.6 | 2.60 |
| December | 🌤️ | 10.4°C | 6.5°C | 2.6°C | 22.8°C | -10.2°C | 82% | 69 | 3.0 | 2.20 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 52 cities in Aichi
🧥 Light layers are sufficient — this Mild Winter stays cool without prolonged hard freezes.
🌤️ Early mornings and evenings are most comfortable during this Hot Summer season.
☔ Heavy Rainfall expected — carry rain gear and plan outdoor activities around these months.
Region-wide monthly averages across 52 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 84% in July · annual avg 80%
Monthly averages · 1981–2025
Across 45 years, Aichi's temperature shows a slight warming trend over the past decade. 2024 was the warmest year overall and 1986 the coolest.
The warmest year on record was 2024 (avg: 16.6°C), while the coldest year was 1986 (avg: 13.9°C).
Averaged across all 52 cities in Aichi · Last 30 years · °C
Averaged across all 52 cities in Aichi · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 52 cities in Aichi for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 | 19.8°C | 16.1°C | 12.3°C | 35.2°C | -6.5°C | 1999 | 81% | 2.5 m/s |
2024 🔥 🌧️ | 20.3°C | 16.6°C | 12.9°C | 34.1°C | -5.3°C | 2467 | 82% | 2.5 m/s |
2023 | 20.2°C | 16.2°C | 12.2°C | 34.1°C | -7.4°C | 2101 | 80% | 2.5 m/s |
2022 | 19.4°C | 15.6°C | 11.8°C | 34.5°C | -9.1°C | 1844 | 81% | 2.5 m/s |
2021 | 19.5°C | 15.7°C | 11.8°C | 33.6°C | -6.4°C | 2230 | 81% | 2.6 m/s |
2020 | 19.6°C | 15.7°C | 11.8°C | 37.8°C | -6.0°C | 2060 | 81% | 2.5 m/s |
2019 | 19.6°C | 15.7°C | 11.7°C | 34.7°C | -5.3°C | 1771 | 80% | 2.6 m/s |
2018 | 19.5°C | 15.6°C | 11.7°C | 38.7°C | -9.2°C | 2007 | 80% | 2.6 m/s |
2017 | 18.8°C | 14.8°C | 10.8°C | 33.0°C | -7.8°C | 1785 | 80% | 2.6 m/s |
2016 | 19.7°C | 15.8°C | 11.8°C | 34.6°C | -7.9°C | 1925 | 81% | 2.6 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.
