Iwanai Weather in August

Iwanai in August sees high temperatures, with highs around 25°C (77°F) and overnight lows of 18°C (64°F). Rainfall is at its peak this month, around 171 mm (6.7 in) on average, so waterproofs are essential.

Rainfall in Iwanai in August

This month is known for its intense rain, often falling heavily. Having a poncho will help you stay dry during the showers. Historically, the month has about 18 days of rain, averaging 171 mm (6.7 in) in total. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Iwanai in August

In August, expect high temperatures in Iwanai, with highs of 25°C (77°F) and lows of 18°C (64°F) at night. The month of August belongs to the summer season. Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 18°C (64°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping. On average, it has the peak temperatures of the year.

Sunshine in Iwanai in August

The city usually sees around 172 hours of sunlight, indicating a moderately sunny period.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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

Iwanai Temperature in August

Min Temperature 18°C (64°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 61%  

Precipitation 171 mm (6.7 in)  

Rainy days 18 days  

Humidity 75% *  

Sunshine 172 hours *  

Percentage Sunshine *  

* Data from: Sapporo, Japan (69 KM, 43 Miles).

What to Wear in Iwanai in August

Pleasant temperatures in August mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Iwanai in August

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

Swimming

7/10

Camping

6/10

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 Iwanai's climate page.

More climate data for Iwanai

Temperature Rainfall Sunshine Humidity

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