Okayama Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Okayama.
Climate overview of Okayama
Okayama, Okayama, Japan, sees big temperature differences between seasons, with August peaking at 33°C (91°F) and January dropping to 11°C (52°F).
The city has a wet climate, receiving around 1350 mm (53 in) of rain/snowfall per year. Despite the high annual total, it has very warm summers and cold winters. June is the wettest month. The sunniest month is May, with 6.9 hours of sunshine per day on average.
Okayama Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Okayama - and find the best time to visit.
Monthly Temperature in Okayama
Visitors to Okayama can expect significant temperature changes throughout the year. On average, daytime temperatures range from a very warm 33°C (91°F) in August to a chilly 11°C (52°F) in January.
Nighttime temperatures range from 25°C (77°F) in August to 3°C (37°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Okayama
Okayama is known for its substantial rain/snowfall, with annual precipitation reaching 1350 mm (53 in). The seasons in Okayama bring significant changes in precipitation. The wettest month, June, receives heavy rainfall, with an average of 187 mm (7.4 in) of precipitation. This rainfall is distributed across 17 rainy days.
In contrast, the driest month, January, experiences much less rainfall, totaling 53 mm (2.1 in) over 19 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Okayama Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Okayama
Okayama enjoys sunny spells year-round. May sees up to 6.9 hours of daily sunshine, perfect for a sunny trip. February, the least sunny month, still offers a generous 4.8 hours of sun despite this cloudier time of the year.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Okayama by Month
The relative humidity is high throughout the year in Okayama.
The city experiences its highest humidity in July, reaching 74%. In April, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Okayama
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May, September, October and November
- Warmest weather: August
- Most sunshine: May and August
- Seasonal pattern: Very warm summers and cold winters
Frequently asked questions about the climate in Okayama
What is the best time to visit Okayama?
April, May, September, October and November typically offer the most optimal weather in Okayama. In contrast, July and August tend to have less optimal conditions. Okayama has very warm summers and cold winters.
What temperatures can I expect in Okayama?
Daytime highs range from 11°C (52°F) in January to 33°C (91°F) in August. Nighttime lows range from 3°C (37°F) to 25°C (77°F). Temperatures vary considerably through the year.
How much rain does Okayama get?
Annual rainfall is around 1350 mm (53 in). June is the wettest month with 187 mm (7.4 in), while January is the driest with 53 mm (2.1 in).
How sunny is Okayama?
Okayama receives around 2,041 hours of sunshine per year. May is the sunniest month with 206 hours, while February is the cloudiest with just 144 hours. Overall, Okayama enjoys abundant sunshine.
Okayama 3-Day Forecast
Okayama on the map
Okayama is highlighted - select any city to see its climate.
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