Weather forecast for todayIsumi, Japan

Weather forecast for today

Current condition 02:03 JST

  • 19°C
  • Feels like:
    19°C
Partly Cloudy
Partly Cloudy
  • Precipitation: 0mm
  • Wind: 10km/hSSE 150°
  • Humidity: 73%
  • Dewpoint: 14°C
  • Pressure: 1024.72mbar
  • Visibility: 16.09km
  • UV index: 0
  • ▼
In Isumi, at the moment, a mix of cloud cover and clear skies can be seen.
The temperature is an enjoyable 19°C. The current temperature is relatively far from the maximum of 26°C forecasted for today.

Monday 19. Oct 2026

  • 26°C
  • 23°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 4%
  • Precipitation: 0mm
  • Wind: 24km/hSW 221°
  • Humidity: 66%
  • UV index: 4
  • Sunrise: 05:47 JST
  • Sunset: 16:59 JST
  • ▼
On Monday, October 19, patchy light may appear briefly, but the overall trend is cloudy.
The temperature will peak at a moderately hot 26°C during the day, slightly dropping to a low of a warm 23°C at night.
Expect a warmer feel as the forecasted high matches September's 25.8°C, rather than October's average of 22°C.
Sunrise will be at 05:47 and sunset at 16:59; the daylight will last for 11h and 11min.

Hourly overview

Hourly temperatures

Warmest period: 12h - 15h 27°C.
Coldest hour: 3h 20°C.

Chance of precipitation

Highest chance: 0h 17%.

Hourly weather forecast

  • 4h
  • 20°C
  • Feels like:
    20°C
Cloudy
Cloudy
  • Precip. probability: 2%
  • Precipitation: 0mm
  • Wind: 10km/hS 187°
  • Humidity: 73%
  • Pressure: 1023mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
Sunrise: 05:47
  • 6h
  • 22°C
  • Feels like:
    22°C
Cloudy
Cloudy
  • Precip. probability: 1%
  • Precipitation: 0mm
  • Wind: 17km/hSSW 211°
  • Humidity: 69%
  • Pressure: 1023mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 8h
  • 23°C
  • Feels like:
    23°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0mm
  • Wind: 20km/hSW 217°
  • Humidity: 64%
  • Pressure: 1023mbar
  • Visibility: 16km
  • UV index: 1
  • ▼
  • 10h
  • 25°C
  • Feels like:
    27°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0mm
  • Wind: 22km/hSW 218°
  • Humidity: 61%
  • Pressure: 1022mbar
  • Visibility: 16km
  • UV index: 4
  • ▼
  • 12h
  • 26°C
  • Feels like:
    27°C
Cloudy
Cloudy
  • Precip. probability: 3%
  • Precipitation: 0mm
  • Wind: 24km/hSW 222°
  • Humidity: 61%
  • Pressure: 1020mbar
  • Visibility: 16km
  • UV index: 3
  • ▼
  • 14h
  • 25°C
  • Feels like:
    27°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0mm
  • Wind: 21km/hSW 216°
  • Humidity: 64%
  • Pressure: 1019mbar
  • Visibility: 16km
  • UV index: 2
  • ▼
  • 16h
  • 24°C
  • Feels like:
    25°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0mm
  • Wind: 21km/hSW 229°
  • Humidity: 70%
  • Pressure: 1019mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
Sunset: 16:59
  • 18h
  • 23°C
  • Feels like:
    24°C
Cloudy
Cloudy
  • Precip. probability: 4%
  • Precipitation: 0mm
  • Wind: 19km/hSW 224°
  • Humidity: 77%
  • Pressure: 1019mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 20h
  • 23°C
  • Feels like:
    24°C
Cloudy
Cloudy
  • Precip. probability: 10%
  • Precipitation: 0mm
  • Wind: 19km/hWSW 237°
  • Humidity: 81%
  • Pressure: 1019mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 22h
  • 23°C
  • Feels like:
    25°C
Cloudy
Cloudy
  • Precip. probability: 13%
  • Precipitation: 0mm
  • Wind: 19km/hSW 229°
  • Humidity: 84%
  • Pressure: 1019mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
Today, in Isumi, the weather will be cloudy.
The temperature will be between the highest temperature of 26°C and the lowest temperature of 20°C. The warmest part of the day is expected around noon.
The forecasted maximum is more consistent with September's typical high of 25.8°C than the average for October. Forecasts show a temperature also more close to September's average minimum of 23.5°C rather than the October average of 19.2°C.
Updated: Oct 18, 2026 @ 17:03:37 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

The current temperature (02:03 JST) is 19°C.

Today, expect a cloud-dominated atmosphere throughout.

Today, the highest temperature will be 26°C, while the lowest temperature will be 23°C.
The maximum temperature will be relatively higher than the average highest temperature of 22°C in October. The lowest temperature will be also relatively higher than the average low of 19.2°C.

On Monday, in Isumi, sunrise will be at 05:47 and sunset at 16:59 (JST).

In Isumi, Japan, today, there will be 11h and 11min of daylight.