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.

Tuesday
29th Sep
18

15

0

2
Wednesday
30th Sep
22

14

3

7
Thursday
1st Oct
22

14

3

7
Friday
2nd Oct
18

9

6

6
Saturday
3rd Oct
20

8

3

6

5-day weather forecast updated at 04:03 on Monday 28th 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 Tuesday 29th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 18°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 90% chance of some rain and little or no wind of 4 kph from the north-east.

18
°C maximum temperature
15
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
2
UV index (Low)
90
% chance of some rain
<30
mm of rainfall expected
0
no heat & humidity
4
kph wind from NE

Koya weather for Wednesday 30th September 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 22°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 east.

22
°C maximum temperature
14
°C minimum temperature
broken clouds
3
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
4
kph wind from E

Koya weather for Thursday 1st October 2026

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 22°C, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 24% chance of some rain and a light breeze of 8 kph from the north.

22
°C maximum temperature
14
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
7
UV index (High)
24
% chance of some rain
<2
mm of rainfall expected
22
°C wind chill
8
kph wind from N

Koya weather for Friday 2nd October 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 18°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north.

18
°C maximum temperature
9
°C minimum temperature
broken clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
18
°C wind chill
11
kph wind from N

Koya weather for Saturday 3rd October 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 5 kph from the south-east.