Koya weather live forecast

Today's maximum temperature in Koya is expected to be 23°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Wednesday
21st Oct
23

14

7

5
Thursday
22nd Oct
15

7

4

5
Friday
23rd Oct
16

7

0

4
Saturday
24th Oct
18

14

2

3
Sunday
25th Oct
21

15

3

4

5-day weather forecast updated at 04:02 on Tuesday 20th October 2026 GMT

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The 5-day weather forecast for Japan (Koya) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Koya weather forecast by day

Below are the detailed weather forecasts for Koya for the next 5 days.

Koya weather for Wednesday 21st October 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 23°C, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 5-10 mm of rainfall expected with 91% chance of some rain and a light breeze of 12 kph from the south-west.

23
°C maximum temperature
14
°C minimum temperature
isolated thunderstorms
7
hours of sunshine
5
UV index (Moderate)
91
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
12
kph wind from SW

Koya weather for Thursday 22nd October 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 15°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north.

15
°C maximum temperature
7
°C minimum temperature
broken clouds
4
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
15
°C wind chill
9
kph wind from N

Koya weather for Friday 23rd October 2026

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 16°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 87% chance of some rain and a light breeze of 8 kph from the south-east.

16
°C maximum temperature
7
°C minimum temperature
mostly cloudy with light rain
0
hours of sunshine
4
UV index (Moderate)
87
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
8
kph wind from SE

Koya weather for Saturday 24th October 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 18°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 30-40 mm of rainfall expected with 90% chance of some rain and a light breeze of 7 kph from the south.

18
°C maximum temperature
14
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
3
UV index (Moderate)
90
% chance of some rain
<40
mm of rainfall expected
0
no heat & humidity
7
kph wind from S

Koya weather for Sunday 25th October 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 55% chance of some rain and a light breeze of 7 kph from the north-west.