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
22nd Sep
19

15

5

7
Wednesday
23rd Sep
21

15

3

5
Thursday
24th Sep
22

15

6

6
Friday
25th Sep
22

14

5

4
Saturday
26th Sep
19

16

0

3

5-day weather forecast updated at 04:05 on Monday 21st 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 Tuesday 22nd September 2026

Expect sunshine and showers in Koya, Japan with a maximum temperature of 19°C, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 15% chance of some rain and a light breeze of 12 kph from the north.

19
°C maximum temperature
15
°C minimum temperature
sunshine and showers
5
hours of sunshine
7
UV index (High)
15
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
12
kph wind from N

Koya weather for Wednesday 23rd September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 66% chance of some rain and little or no wind of 4 kph from the south.

21
°C maximum temperature
15
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
5
UV index (Moderate)
66
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
4
kph wind from S

Koya weather for Thursday 24th September 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 22°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north.

22
°C maximum temperature
15
°C minimum temperature
broken clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
6
kph wind from N

Koya weather for Friday 25th September 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 kph from the west.

22
°C maximum temperature
14
°C minimum temperature
broken clouds
5
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
4
kph wind from W

Koya weather for Saturday 26th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 19°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 83% chance of some rain and little or no wind of 5 kph from the south-east.