Iwanai Weather in May

May in Iwanai brings moderate temperatures around 15°C (59°F) during the day, dropping to 7°C (45°F) at night, with quite a bit of rainfall expected, averaging around 88 mm (3.5 in) for the month.

Rainfall in Iwanai in May

Historically, the month has about 18 days of rain, averaging 88 mm (3.5 in) in total. With rain spread across many days but low totals, showers are typically short and light rather than heavy.

Temperature in Iwanai in May

Expect highs of 15°C (59°F) in Iwanai in May, with nights dropping to around 7°C (45°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With overnight lows of 7°C (45°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Iwanai in May

The days are predominantly sunny, with an estimated total of around 199 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Should you favor a climate that's both dry and comfortably warm, June, July, August and September 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.