Onjuku Weather in September

September in Onjuku brings high temperatures, with daytime highs of 27°C (81°F) and nights around 23°C (73°F). Quite a bit of rainfall is expected, around 208 mm (8.2 in), so pack an umbrella.

Rainfall in Onjuku in September

Typically around 18 days of rainfall are expected, averaging 208 mm (8.2 in) for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.

Temperature in Onjuku in September

September in Onjuku sees highs of 27°C (81°F) and lows of 23°C (73°F) overnight. During September, the summer season is in full swing. This kind of day-to-night contrast is typical for this time of year. With overnight lows of 23°C (73°F), evenings stay pleasantly warm.

Sunshine in Onjuku in September

The city usually sees around 135 hours of sunlight, indicating a moderately sunny period.

Should you favor a climate that's both dry and comfortably warm, May and July typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit Japan, check out our Onjuku's climate page.

Onjuku Temperature in September

Min Temperature 23°C (73°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 61%  

Precipitation 208 mm (8.2 in)  

Rainy days 18 days  

Humidity 77% *  

Sunshine 135 hours *  

Percentage Sunshine *  

* Data from: Chiba, Japan (49 KM, 30 Miles).

What to Wear in Onjuku in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Onjuku in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Japan, check out our Onjuku's climate page.

More climate data for Onjuku

Temperature Rainfall Sunshine Humidity

See the full Onjuku climate overview or explore weather in Japan.