WEATHERblaze

Ōsaka Historical Weather Data & Climate

Historical Climate Data for 42 Cities
1981–2025
Japan

Quick Climate Facts

(19812025)
Hottest City
🔥
Taishi
Jul High 32.0°C
Coldest City
❄️
Toyono
Jan Low -4.0°C
Wettest City
🌧
Taishi
1719 mm/yr
Driest City
🏜️
Misaki
1461 mm/yr
Hottest Month
🌡
August
Avg 25.6°C
Max 32.4°C
Coldest Month
🧊
February
Avg 6.0°C
Min -3.6°C
Cities With Data
🏙️
42
cities in Ōsaka
Data Coverage
📅
45 yrs
19812025

Ōsaka Climate Overview

Ōsaka has a warm temperate climate with warm summers and cold winters.

Ōsaka has an average annual temperature of 14.6°C across all 42 cities, with approximately 1673 mm of annual precipitation and average humidity of 82%. Temperatures peak in August and drop to their lowest in February, while rainfall is highest during summer months.

The warmest city is Taishi with average July highs of 32.0°C, while Toyono is the coldest with average January lows of -4.0°C. Humidity remains high throughout the year creating cold and damp conditions. These seasonal patterns make summer pleasant for travel, while winters can bring frost and occasional snowfall.

🏙️ Cities in Ōsaka — Weather History

📊 Ōsaka Monthly Climate Data

Monthly Climate Data
Month🌤️HighLowAvgHumid %Rain (mm)Wind (m/s)Solar (kWh/m²)
January🌤️13.3°C-3.5°C4.9°C83%672.42.30
February🌤️15.5°C-3.6°C6.0°C81%772.53.00
March18.8°C-2.3°C8.2°C80%1202.53.90
April23.4°C0.5°C11.9°C79%1342.34.90
May🌧️26.6°C6.3°C16.4°C80%1702.05.20
June🌧️29.3°C11.9°C20.6°C83%2181.74.80
July🌧️31.9°C17.7°C24.8°C85%2011.75.10
August🌧️32.4°C18.7°C25.6°C84%1611.75.20
September🌧️30.4°C13.2°C21.8°C84%2141.84.10
October🌧️25.9°C6.5°C16.2°C83%1522.03.30
November21.2°C1.2°C11.2°C83%912.02.60
December🌤️16.4°C-2.0°C7.2°C83%692.22.20

Showing average climate conditions across 45 years (1981–2025) · averaged across all 42 cities in Ōsaka

🌦 Weather in Ōsaka Across Seasons

❄️ Winter in Ōsaka

February is Ōsaka's coldest month, with average lows reaching -3.6°C.
🌡️December to February (avg) · -3.0°C15.1°C

🧥 Expect frosty nights and below-freezing temperatures during this Cold Winter period.

☀️ Summer in Ōsaka

Summer temperatures in Ōsaka peak in August, climbing to 32.4°C.
🌡️July to September (avg) · 16.5°C31.6°C

🌤️ Early mornings and evenings are most comfortable during this Hot Summer season.

🌧️ Rainy Season in Ōsaka

Ōsaka sees its highest rainfall in June, receiving approximately 218 mm of precipitation.
🌧️June to September (avg) ·  up to 218 mm

☔ Heavy Rainfall expected — carry rain gear and plan outdoor activities around these months.

📈 Ōsaka Monthly Averages

🌡️ Temperature Patterns

Region-wide monthly averages across 42 cities · 19812025 · °C

🌡️ Ōsaka Monthly Temperature Guide

August is the hottest month in Ōsaka, with average highs reaching 32.4°C, while February is the coldest with lows dropping to -3.6°C.

Temperatures rise steadily from spring, peak in August, and gradually decline through autumn into winter.

These seasonal patterns make summer pleasant for travel, while winters can bring frost and occasional snowfall.

🌧️ Rainfall Distribution

Region-wide monthly rainfall · 19812025 · mm/month

💨 Humidity & Wind Speed

Monthly averages · 19812025

🌧 Rainfall & Humidity in Ōsaka

Ōsaka receives its highest rainfall in June, while humidity peaks during summer months.
🌧️ Wettest: June218 mm☀️ Driest: January67 mm

💧 Humidity peaks at 85% in July · annual avg 82%

📅 Ōsaka Yearly Climate Trends

The warmest year on record was 2024 (avg: 16.3°C), while the coldest year was 1986 (avg: 13.2°C).

📊 Key Climate Trends

  • 🌡️ Ōsaka's temperature shows a slight warming trend over the past decade
  • 📈 Minimum temperatures show a slight warming trend in recent years
  • 🌧️ Rainfall has increased noticeably in recent years compared to earlier periods

🌡️ Annual Temperature Trend

View Range:

Averaged across all 42 cities in Ōsaka · Last 10 years · °C

Ōsaka's temperature shows a slight warming trend over the past decade. The region-wide average sits at 14.6°C with annual rainfall averaging 1673 mm.

🌧️ Annual Precipitation

View Range:

Averaged across all 42 cities in Ōsaka · Last 10 years · mm/year

Annual rainfall in Ōsaka shows noticeable variation. Rainfall has increased noticeably in recent years compared to earlier periods.
📅 Yearly Climate Data Overview

🔥 hottest  ·  ❄️ coldest  ·  🌧️ wettest

ℹ️ Values are averages across all 42 cities in Ōsaka for each year.

YearMin TempAvg TempMax TempRainfall (mm)Avg HumidityAvg Wind
2025
6.8°C15.7°C24.5°C183282%2.0 m/s
2024 🔥 🌧️
7.4°C16.3°C25.2°C225084%2.0 m/s
2023
6.8°C15.9°C25.0°C203882%1.9 m/s
2022
5.8°C14.9°C23.9°C157682%1.9 m/s
2021
6.4°C15.1°C23.8°C215683%2.1 m/s
2020
6.4°C15.1°C23.8°C196182%2.0 m/s
2019
6.2°C15.2°C24.1°C176282%2.0 m/s
2018
5.6°C15.2°C24.8°C203082%2.1 m/s
2017
5.5°C14.3°C23.1°C171182%2.0 m/s
2016
5.8°C15.1°C24.4°C187183%2.0 m/s

Showing 1 to 10 of 45 years

🏙️ Explore More Cities in Ōsaka

❓ Frequently Asked Questions

What is the hottest city in Ōsaka?
Taishi is the hottest city in Ōsaka with an average July high of 32.0°C based on 45 years of data. View Taishi weather history →
What is the coldest city in Ōsaka?
Toyono is the coldest city with average January lows of -4.0°C. View Toyono weather history →
Which city in Ōsaka gets the most rain?
Taishi is the wettest city in Ōsaka with approximately 1719 mm of annual precipitation on average.
What is the warmest month in Ōsaka?
August is the warmest month in Ōsaka, with region-wide average highs of 32.4°C and average lows of 18.7°C.
What is the coldest month in Ōsaka?
February is the coldest month in Ōsaka with average lows of -3.6°C and average highs of 15.5°C.
What is the rainiest month in Ōsaka?
June is the rainiest month in Ōsaka with approximately 218 mm on average, while January is the driest with 67 mm.
How many cities in Ōsaka have weather data?
WeatherBlaze has historical weather data for 42 cities in Ōsaka, covering 45 years of climate records from 1981 to 2025.
Where does this climate data come from?
All data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis data. It includes monthly temperature, precipitation, humidity, wind speed, and solar radiation.

📡 Data Source

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.

Parameters included:
  • Temperature (Min, Max)
  • Precipitation
  • Relative Humidity
  • Wind Speed
  • Solar Radiation
Data specifications:
  • Resolution: Monthly
  • Spatial: 0.5° × 0.625°
  • Source: MERRA-2
  • Coverage: 19812025
  • Cities: 42 in Ōsaka