Koya weather live forecast

Today's maximum temperature in Koya is expected to be 20°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Monday
22nd Jun
20

15

2

6
Tuesday
23rd Jun
20

14

3

6
Wednesday
24th Jun
21

13

4

5
Thursday
25th Jun
20

16

0

1
Friday
26th Jun
23

17

2

3

5-day weather forecast updated at 04:03 on Sunday 21st 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 22nd June 2026

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 20°C, maximum UV of 6 (High) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 18% chance of some rain and a light breeze of 11 kph from the north-west.

20
°C maximum temperature
15
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
6
UV index (High)
18
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
11
kph wind from NW

Koya weather for Tuesday 23rd June 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 20°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north.

20
°C maximum temperature
14
°C minimum temperature
broken clouds
3
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
6
kph wind from N

Koya weather for Wednesday 24th June 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the south-east.

21
°C maximum temperature
13
°C minimum temperature
broken clouds
4
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
6
kph wind from SE

Koya weather for Thursday 25th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 20°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 40-50 mm of rainfall expected with 80% chance of some rain and a light breeze of 8 kph from the south.

20
°C maximum temperature
16
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
1
UV index (Low)
80
% chance of some rain
<50
mm of rainfall expected
0
no heat & humidity
8
kph wind from S

Koya weather for Friday 26th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 23°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 40-50 mm of rainfall expected with 74% chance of some rain and little or no wind of 6 kph from the west.