How Hot Was the Summer of 2025? A 5-Year Comparison
“Was this summer abnormal?” ── Looking into that uneasy feeling
How did you experience the summer of 2025?
“Every year is hot, but somehow this year felt different…”
To answer that question, we analyzed weather data from 2020 to 2025.
Here’s a clear look at where the summer of 2025 stands in the past five years.
Comparing Extreme Heat Over the Past 6 Summers
▶ Data Points Analyzed
- Average temperature (July & August)
- Number of days above 35°C (extreme heat days)
- Number of nights above 25°C (tropical nights)
- Average relative humidity
Based on data from the Japan Meteorological Agency
▶ Graph Overview
Summer Trends (2020–2025)
-
2020
- Relatively mild
- Prolonged rainy season caused a cooler summer
-
2021
- Fewer hot days
- High humidity made it feel sticky and uncomfortable
-
2022
- Many extreme heat days
- Severe heat began unusually early in June
-
2023
- Record-breaking heat
- Heatstroke cases hit an all-time high
-
2024
- Temperatures close to average
- Felt hotter due to persistently high humidity
-
2025
- Markedly hotter overall
- Nights stayed warm, with relentless heat and humidity
Why 2025 Felt “Especially Unusual”
- Nights stayed hot → Keeping the air conditioner on all night became common
- Heat × Humidity combo → Many days felt like over 40°C
For many people, the real struggle wasn’t just daytime heat but the sleepless, sweltering nights that disrupted daily routines.
Preparing for Future Summers
The 2025 experience is a reminder: heat countermeasures are essential.
- Prevent indoor heatstroke with circulators and heat-shielding curtains
- Use smartwatches and thermometers to track your body and room conditions
- Clean your air conditioner filters frequently
Related Articles You May Like
- Comparing Temperatures: 2024 vs. 2025
- The Hidden Danger of High Humidity in Summer
- Why Tropical Nights Are Especially Risky
Conclusion: Data vs. Experience
Instead of simply saying, “It was hot,”
understanding the gap between how it felt and what the data shows can help us prepare for the future.
The summer of 2025 wasn’t just hot—it may be remembered as a truly abnormal summer.