Shiojiri Weather in September

During September, Shiojiri experiences high daytime temperatures of 24°C (75°F) and cooler nights around 14°C (57°F). As part of the summer season, expect quite a bit of rainfall. Around 205 mm (8.1 in) is typical.

Rainfall in Shiojiri in September

Historically, the month has about 19 days of rain, averaging 205 mm (8.1 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 Shiojiri in September

September in Shiojiri sees highs of 24°C (75°F) and lows of 14°C (57°F) overnight. Experience the summer season in September. This kind of day-to-night contrast is typical for this time of year. At 14°C (57°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.

Sunshine in Shiojiri in September

The area enjoys a moderate level of sunlight, with around 142 hours. It's a good balance between sunny and cloudy days.

If you prefer enjoying temperate temperatures and rain-free days, May and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.