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.

Monday
15th Jun
18

12

2

7
Tuesday
16th Jun
21

13

6

6
Wednesday
17th Jun
20

14

3

7
Thursday
18th Jun
22

15

2

7
Friday
19th Jun
22

16

3

7

5-day weather forecast updated at 04:02 on Sunday 14th 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 Monday 15th June 2026

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 18°C, maximum UV of 7 (High) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 49% chance of some rain and little or no wind of 5 kph from the east.

18
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
7
UV index (High)
49
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
5
kph wind from E

Koya weather for Tuesday 16th June 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 21°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the south-east.

21
°C maximum temperature
13
°C minimum temperature
broken clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
5
kph wind from SE

Koya weather for Wednesday 17th June 2026

Expect mostly cloudy with rain in Koya, Japan with a maximum temperature of 20°C, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 10-20 mm of rainfall expected with 48% chance of some rain and a light breeze of 9 kph from the south-east.

20
°C maximum temperature
14
°C minimum temperature
mostly cloudy with rain
3
hours of sunshine
7
UV index (High)
48
% chance of some rain
<20
mm of rainfall expected
20
°C wind chill
9
kph wind from SE

Koya weather for Thursday 18th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 22°C, maximum UV of 7 (High) and 2 hours of bright sunshine. There are 20-30 mm of rainfall expected with 71% chance of some rain and little or no wind of 6 kph from the south-east.

22
°C maximum temperature
15
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
7
UV index (High)
71
% chance of some rain
<30
mm of rainfall expected
22
°C wind chill
6
kph wind from SE

Koya weather for Friday 19th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 22°C, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 69% chance of some rain and little or no wind of 4 kph from the south.