Weather forecast for todayKaratsu, Japan

Weather forecast for today

Current condition 00:48 JST

  • 19°C
  • Feels like:
    19°C
Clear
Clear
  • Precipitation: 0mm
  • Wind: 10km/hSE 130°
  • Humidity: 69%
  • Dewpoint: 13°C
  • Pressure: 1023.71mbar
  • Visibility: 16.09km
  • UV index: 0
  • ▼
Currently, in Karatsu, the sky is a flawless clear blue with no cloud formations.
The temperature is a breezy 19°C. The current temperature is relatively far from today's maximum-forecasted 28°C.

Sunday 18. Oct 2026

  • 28°C
  • 22°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 4%
  • Precipitation: 0mm
  • Wind: 14km/hSSW 192°
  • Humidity: 62%
  • UV index: 6
  • Sunrise: 06:26 JST
  • Sunset: 17:43 JST
  • ▼
Today, in Karatsu, occasional cloudiness will be present, but there will still be plenty of sun.
Temperature fluctuations between a temperate 28°C and a delightful 22°C are expected.
The maximum heat index, which measures the combined effect of heat and moisture, is assessed at a humid 30°C. Note that heat index values are valued for light wind and location in the shade.
Today, the temperature forecast of 28°C will better match September's climate average than that of October.
Sunrise will be at 06:26 and sunset at 17:43; the daylight will last for 11h and 17min.

Hourly overview

Hourly temperatures

Warmest hour: 16h 29°C.
Coldest period: 4h - 7h 18°C.

Chance of precipitation

Highest chance: 22h 6%.

Hourly weather forecast

  • 2h
  • 19°C
  • Feels like:
    19°C
Mostly Clear
Mostly Clear
  • Precip. probability: 2%
  • Precipitation: 0mm
  • Wind: 9km/hSSE 148°
  • Humidity: 72%
  • Pressure: 1023mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 4h
  • 18°C
  • Feels like:
    18°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0mm
  • Wind: 7km/hSE 141°
  • Humidity: 77%
  • Pressure: 1022mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 6h
  • 18°C
  • Feels like:
    18°C
Mostly Clear
Mostly Clear
  • Precip. probability: 2%
  • Precipitation: 0mm
  • Wind: 6km/hSE 146°
  • Humidity: 82%
  • Pressure: 1023mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
Sunrise: 06:26
  • 8h
  • 20°C
  • Feels like:
    20°C
Mostly Sunny
Mostly Sunny
  • Precip. probability: 3%
  • Precipitation: 0mm
  • Wind: 6km/hSSE 158°
  • Humidity: 74%
  • Pressure: 1023mbar
  • Visibility: 16km
  • UV index: 1
  • ▼
  • 10h
  • 24°C
  • Feels like:
    24°C
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0mm
  • Wind: 7km/hS 175°
  • Humidity: 59%
  • Pressure: 1022mbar
  • Visibility: 16km
  • UV index: 4
  • ▼
  • 12h
  • 27°C
  • Feels like:
    28°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0mm
  • Wind: 10km/hSSW 199°
  • Humidity: 55%
  • Pressure: 1021mbar
  • Visibility: 16km
  • UV index: 6
  • ▼
  • 14h
  • 27°C
  • Feels like:
    29°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0mm
  • Wind: 12km/hSSW 209°
  • Humidity: 57%
  • Pressure: 1019mbar
  • Visibility: 16km
  • UV index: 4
  • ▼
  • 16h
  • 27°C
  • Feels like:
    29°C
Cloudy
Cloudy
  • Precip. probability: 1%
  • Precipitation: 0mm
  • Wind: 14km/hSSW 210°
  • Humidity: 60%
  • Pressure: 1019mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
Sunset: 17:43
  • 18h
  • 26°C
  • Feels like:
    27°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 4%
  • Precipitation: 0mm
  • Wind: 13km/hSSW 205°
  • Humidity: 67%
  • Pressure: 1019mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 20h
  • 24°C
  • Feels like:
    26°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0mm
  • Wind: 12km/hSSW 195°
  • Humidity: 76%
  • Pressure: 1020mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 22h
  • 24°C
  • Feels like:
    25°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0mm
  • Wind: 12km/hS 190°
  • Humidity: 79%
  • Pressure: 1020mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
Today, in Karatsu, primarily cloud-filled and occasionally dry and sunny weather is predicted.
The temperature will be between the highest temperature of 27°C and the lowest temperature of 18°C. The warmest part of the day will be from 12h to 16h.
The temperature will feel more in line with September's average high than the expected maximum for October. Today, the night will be also more close to September's average minimum of 21.5°C than October's usual value of 17.3°C.
Updated: Oct 17, 2026 @ 15:48:31 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

The temperature at 00:48 JST is 19°C.

Today, in Karatsu, sunlight and clouds will take turns dominating the sky.

Today, the highest temperature in Karatsu will be 28°C, while the lowest temperature will be 22°C. The maximum heat index, which factors the actual air temperature with the relative humidity, is evaluated at 30°C.
The maximum temperature will be notably higher than the average highest temperature of 21.5°C in October. The lowest temperature will be a few degrees higher than the average low of 17.3°C.

On Sunday, in Karatsu, sunrise will be at 06:26 and sunset at 17:43 (JST).

In Karatsu, the length of the day today will be 11h and 17min.