Koya weather live forecast

Today's maximum temperature in Koya is expected to be 21°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Tuesday
20th Oct
21

17

3

2
Wednesday
21st Oct
23

13

7

5
Thursday
22nd Oct
14

6

4

5
Friday
23rd Oct
16

6

2

3
Saturday
24th Oct
17

14

0

5

5-day weather forecast updated at 04:02 on Monday 19th 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 Tuesday 20th October 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 21°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 69% chance of some rain and little or no wind of 6 kph from the south.

21
°C maximum temperature
17
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
2
UV index (Low)
69
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
6
kph wind from S

Koya weather for Wednesday 21st October 2026

Expect sunshine and showers 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 90% chance of some rain and a light breeze of 11 kph from the south-west.

23
°C maximum temperature
13
°C minimum temperature
sunshine and showers
7
hours of sunshine
5
UV index (Moderate)
90
% chance of some rain
<10
mm of rainfall expected
23
°C wind chill
11
kph wind from SW

Koya weather for Thursday 22nd October 2026

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 14°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 2% chance of some rain and a light breeze of 9 kph from the north.

14
°C maximum temperature
6
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
5
UV index (Moderate)
2
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
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 3 (Moderate) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 63% chance of some rain and a light breeze of 7 kph from the south-east.

16
°C maximum temperature
6
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
3
UV index (Moderate)
63
% chance of some rain
<2
mm of rainfall expected
16
°C wind chill
7
kph wind from SE

Koya weather for Saturday 24th October 2026

Expect cloudy with some rain in Koya, Japan with a maximum temperature of 17°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 74% chance of some rain and little or no wind of 6 kph from the south-east.