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.

Monday
28th Sep
21

18

0

5
Tuesday
29th Sep
18

14

0

1
Wednesday
30th Sep
21

14

0

7
Thursday
1st Oct
22

15

1

6
Friday
2nd Oct
17

10

3

1

5-day weather forecast updated at 04:03 on Sunday 27th September 2026 GMT

More about Koya

Koya by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Japan

Fred Olsen: Top cruise offers for 2026/2027

Sale

Explore latest offers on Fred Olsen Cruises in 2026/2027
Find last minute deals or early bird discounts
Filter offers by price, destination, ship & departure point

Go to Fred Olsen deal >>

View all Fred Olsen offers

Cruise deal finder

Destination

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 28th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 30-40 mm of rainfall expected with 97% chance of some rain and little or no wind of 5 kph from the south-west.

21
°C maximum temperature
18
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
5
UV index (Moderate)
97
% chance of some rain
<40
mm of rainfall expected
0
no heat & humidity
5
kph wind from SW

Koya weather for Tuesday 29th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 18°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 86% chance of some rain and little or no wind of 5 kph from the north-east.

18
°C maximum temperature
14
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
1
UV index (Low)
86
% chance of some rain
<30
mm of rainfall expected
18
°C wind chill
5
kph wind from NE

Koya weather for Wednesday 30th September 2026

Expect mostly cloudy with rain in Koya, Japan with a maximum temperature of 21°C, maximum UV of 7 (High) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 43% chance of some rain and little or no wind of 5 kph from the north-east.

21
°C maximum temperature
14
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
7
UV index (High)
43
% chance of some rain
<10
mm of rainfall expected
21
°C wind chill
5
kph wind from NE

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 6 (High) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 45% chance of some rain and little or no wind of 6 kph from the north-west.

22
°C maximum temperature
15
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
6
UV index (High)
45
% chance of some rain
<5
mm of rainfall expected
22
°C wind chill
6
kph wind from NW

Koya weather for Friday 2nd October 2026

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 17°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 12% chance of some rain and a light breeze of 10 kph from the north.