Sayama, Osaka, Japan Climate Change Severity

48
High
The current climate change severity in Sayama is High, with a 4% improvement in the climate score compared to last 15 years. This suggests improved conditions, with more favorable environmental indicators and a reduction in negative impacts.
Data: Jan. to Aug. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Sayama Weather Condition Changes (Historic Vs 2025)

2025
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2025

Over the past 15 year(s), Sayama temperature has changed by around +5.3%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Aug. (Historical Vs 2025)

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
4326
-39.5%
cloudyCloudy
6638
-42.4%
rainyRainy
105108
2.8%
snowySnowy
00
0%
mistyMisty
00
0%

Disclaimer: Other weather conditions not shown may affect the total day count.

Climate Change Indicators:

Over the past 15 years, Sayama has experienced measurable shifts in key climate parameters, contributing to the current severity score of 48 (within the High severity category). While the score remains High, certain factors have improved over time. Here’s a breakdown of the specific changes observed:

Severity Score

48/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Sayama experienced significant changes:

Temperature change of

+0.8 °C

Variation in annual rainfall

-17.2 %

Change in average humidity

-9.5 %

PM2.5 levels surged by

-8.1 %

Heatwave changed by

+12.4 day(s)

Coldwave changed by

-2 day(s)

Wind speeds changed by

+1.3 km/h

These indicators show improvement in key parametes of climate, but Sayama remains in the High severity category. Continuous focus on climate resilience is necessary to avoid further worsening and ensure sustainability.

Check how we calculate Climate Change Severity
Based on data from Jan. to Aug.

Sayama Weather Forecast 30 Days (September - October 2025)
Sayama, Osaka, Japan

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Tue. 30, Sep.
partly cloudyPartly Cloudy
Temperature Icon27°/20°
Humidity Icon62%
Wind Icon10km/h
Wed. 1, Oct.
sunnySunny
Temperature Icon27°/21°
Humidity Icon61%
Wind Icon15km/h
Thu. 2, Oct.
partly cloudyPartly Cloudy
Temperature Icon27°/20°
Humidity Icon57%
Wind Icon14km/h
Fri. 3, Oct.
partly cloudyPartly Cloudy
Temperature Icon23°/21°
Humidity Icon66%
Wind Icon7km/h
Sat. 4, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon26°/20°
Humidity Icon70%
Wind Icon8km/h
Sun. 5, Oct.
cloudyCloudy
Temperature Icon29°/21°
Humidity Icon75%
Wind Icon11km/h
Mon. 6, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon28°/23°
Humidity Icon69%
Wind Icon12km/h
Tue. 7, Oct.
partly cloudyPartly Cloudy
Temperature Icon30°/23°
Humidity Icon68%
Wind Icon10km/h
Wed. 8, Oct.
cloudyCloudy
Temperature Icon29°/23°
Humidity Icon66%
Wind Icon16km/h
Thu. 9, Oct.
partly cloudyPartly Cloudy
Temperature Icon24°/21°
Humidity Icon63%
Wind Icon21km/h
Fri. 10, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/19°
Humidity Icon67%
Wind Icon11km/h
Sat. 11, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon24°/18°
Humidity Icon73%
Wind Icon14km/h
Sun. 12, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon26°/20°
Humidity Icon64%
Wind Icon9km/h
Mon. 13, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon28°/18°
Humidity Icon58%
Wind Icon18km/h
Tue. 14, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon24°/22°
Humidity Icon68%
Wind Icon31km/h
Wed. 15, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon23°/15°
Humidity Icon72%
Wind Icon14km/h
Thu. 16, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon23°/14°
Humidity Icon71%
Wind Icon12km/h
Fri. 17, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/15°
Humidity Icon75%
Wind Icon13km/h
Sat. 18, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/14°
Humidity Icon70%
Wind Icon12km/h
Sun. 19, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/15°
Humidity Icon73%
Wind Icon15km/h
Mon. 20, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/15°
Humidity Icon71%
Wind Icon15km/h
Tue. 21, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/14°
Humidity Icon71%
Wind Icon12km/h
Wed. 22, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/15°
Humidity Icon73%
Wind Icon15km/h
Thu. 23, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/15°
Humidity Icon74%
Wind Icon17km/h
Fri. 24, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/14°
Humidity Icon70%
Wind Icon13km/h
Sat. 25, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/14°
Humidity Icon73%
Wind Icon15km/h
Sun. 26, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/13°
Humidity Icon71%
Wind Icon13km/h
Mon. 27, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/12°
Humidity Icon70%
Wind Icon13km/h
Tue. 28, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/13°
Humidity Icon71%
Wind Icon13km/h
Wed. 29, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon19°/13°
Humidity Icon72%
Wind Icon15km/h
Thu. 30, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/12°
Humidity Icon69%
Wind Icon14km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onTue. 7, Oct.

29.7°C

Low will be onThu. 30, Oct.

11.8°C

HumidityHumidity

High will be onSun. 5, Oct.

75%

Low will be onThu. 2, Oct.

57%

Wind SpeedWind Speed

High will be onTue. 14, Oct.

31.3km/h

Low will be onFri. 3, Oct.

6.5km/h

PrecipitationPrecipitation

High will be onWed. 22, Oct.

13.1mm

Low will be onFri. 3, Oct.

0.01mm

Ultraviolet IndexUV

High will be onTue. 7, Oct.

7

Low will be onFri. 3, Oct.

0.3

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