Koya weather live forecast

Today's maximum temperature in Koya is expected to be 19°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Tuesday
30th Sep
19

14

4

6
Wednesday
1st Oct
19

14

3

6
Thursday
2nd Oct
21

13

8

6
Friday
3rd Oct
20

15

0

2
Saturday
4th Oct
20

16

1

2

5-day weather forecast updated at 04:04 on Monday 29th September 2025 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 30th September 2025

Expect broken clouds in Koya, Japan with a maximum temperature of 19°C, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north.

19
°C maximum temperature
14
°C minimum temperature
broken clouds
4
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 1st October 2025

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 19°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 44% chance of some rain and little or no wind of 5 kph from the north-west.

19
°C maximum temperature
14
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
6
UV index (High)
44
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
5
kph wind from NW

Koya weather for Thursday 2nd October 2025

Expect broken clouds in Koya, Japan with a maximum temperature of 21°C, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north.

21
°C maximum temperature
13
°C minimum temperature
broken clouds
8
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
8
kph wind from N

Koya weather for Friday 3rd October 2025

Expect overcast skies in Koya, Japan with a maximum temperature of 20°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the south-east.

20
°C maximum temperature
15
°C minimum temperature
overcast skies
0
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
7
kph wind from SE

Koya weather for Saturday 4th October 2025

Expect overcast skies in Koya, Japan with a maximum temperature of 20°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the south-east.

20
°C maximum temperature
16
°C minimum temperature
overcast skies
1
hour of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
8
kph wind from SE

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Metric (°C / mm) | Imperial (°F / inches)

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Japan - quick facts
Flight time^✝	11.5 to 15 hours
Time difference	UK +9 hours
Language(s)	Japanese
Currency	Japanese Yen
Electricity	A + B plug (100V)
Driving side	Left
Why visit?	Culture Nature Nightlife
Tourist info	Japan National Tourism Organization