Which is the hottest month in Koya?

The hottest time of year in Koya is normally August. Expect maximum daytime temperatures to reach 31°C with high heat and humidity.

Which month has the most rain in Koya?

In terms of rainfall, June is usually the wettest month in Koya with 181mm on average. There are normally 20 days in June with some rain.

When is it sunniest in Koya?

The sunniest time of year in Koya is normally January with bright sunshine on average for 59% of daylight hours; that's 6 hours of sunshine per day.

When is the sea warmest in Koya?

The sea is usually at its warmest in Koya in August when the water temperature reaches 26°C.

Best time to visit Koya

Q: When is the best time to visit Koya?

The best times to visit Koya, Japan are in June, July and September Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 8 hours or more.

The best times to visit Koya, Japan are in June, July and September based on our default weather conditions. Update your weather preferences to see which months best match.

Koya by month

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

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When is the best time to visit Koya?

The best times to visit Koya, Japan are in June, July and September based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 8 hours or more [remove]

Change the criteria to reflect your weather preferences.

1.5
Jan
1.5
Feb
1.5
Mar
2.5
Apr
4
May
4
Jun
4
Jul
4
Aug
4
Sep
3.5
Oct
1.5
Nov
1.5
Dec

Change criteria

Max Day Temperature (°C)

6
Jan
7
Feb
10
Mar
17
Apr
21
May
23
Jun
27
Jul
29
Aug
25
Sep
20
Oct
15
Nov
9
Dec

Hours of Sunshine (daily)

5
Jan
5
Feb
5
Mar
6
Apr
6
May
5
Jun
5
Jul
6
Aug
5
Sep
5
Oct
5
Nov
5
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Japan (Koya) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

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