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.

Friday
25th Sep
23

13

2

5
Saturday
26th Sep
19

16

0

1
Sunday
27th Sep
20

17

0

4
Monday
28th Sep
20

17

1

2
Tuesday
29th Sep
20

16

0

5

5-day weather forecast updated at 04:02 on Thursday 24th September 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 25th September 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 23°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 kph from the north-east.

23
°C maximum temperature
13
°C minimum temperature
broken clouds
2
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
23
°C wind chill
4
kph wind from NE

Koya weather for Saturday 26th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 19°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 89% chance of some rain and little or no wind of 4 kph from the south-east.

19
°C maximum temperature
16
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
1
UV index (Low)
89
% chance of some rain
<20
mm of rainfall expected
19
°C wind chill
4
kph wind from SE

Koya weather for Sunday 27th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 83% chance of some rain and little or no wind of 4 kph from the south-west.

20
°C maximum temperature
17
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
4
UV index (Moderate)
83
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
4
kph wind from SW

Koya weather for Monday 28th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 20°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 59% chance of some rain and little or no wind of 4 kph from the north-west.

20
°C maximum temperature
17
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
2
UV index (Low)
59
% chance of some rain
<10
mm of rainfall expected
20
°C wind chill
4
kph wind from NW

Koya weather for Tuesday 29th September 2026

Expect cloudy with some rain in Koya, Japan with a maximum temperature of 20°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 53% chance of some rain and little or no wind of 5 kph from the north-east.