Koya weather live forecast

Today's maximum temperature in Koya is expected to be 18°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Friday
5th Jun
18

14

0

4
Saturday
6th Jun
21

14

3

7
Sunday
7th Jun
18

14

1

4
Monday
8th Jun
22

14

2

4
Tuesday
9th Jun
19

13

6

7

5-day weather forecast updated at 04:02 on Thursday 4th June 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 Friday 5th June 2026

Expect mostly cloudy with rain in Koya, Japan with a maximum temperature of 18°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 25% chance of some rain and a light breeze of 9 kph from the south-east.

18
°C maximum temperature
14
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
4
UV index (Moderate)
25
% chance of some rain
<10
mm of rainfall expected
18
°C wind chill
9
kph wind from SE

Koya weather for Saturday 6th June 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 21°C, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 kph from the south-east.

21
°C maximum temperature
14
°C minimum temperature
broken clouds
3
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
21
°C wind chill
4
kph wind from SE

Koya weather for Sunday 7th June 2026

Expect mostly cloudy with rain in Koya, Japan with a maximum temperature of 18°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 20-30 mm of rainfall expected with 82% chance of some rain and a light breeze of 12 kph from the south-east.

18
°C maximum temperature
14
°C minimum temperature
mostly cloudy with rain
1
hour of sunshine
4
UV index (Moderate)
82
% chance of some rain
<30
mm of rainfall expected
18
°C wind chill
12
kph wind from SE

Koya weather for Monday 8th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 10-20 mm of rainfall expected with 70% chance of some rain and a light breeze of 9 kph from the west.

22
°C maximum temperature
14
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
4
UV index (Moderate)
70
% chance of some rain
<20
mm of rainfall expected
22
°C wind chill
9
kph wind from W

Koya weather for Tuesday 9th June 2026

Expect mostly cloudy with rain in Koya, Japan with a maximum temperature of 19°C, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 29% chance of some rain and a light breeze of 7 kph from the north.