News Shiojiri Nagano Japan September 11, 2025

Weather Update for Shiojiri, Japan: A Look Ahead into the Next Few Days

As we dive into the weather forecast for Shiojiri, Japan, residents can expect a mix of mild temperatures, light rain, and overcast skies over the coming days. Let’s break down what lies ahead!

Thursday, September 12, 2025 - A Wet Start

On Thursday, Shiojiri will experience a maximum temperature of 21°C (69°F), while the minimum will hover around 16°C (60°F). The average temperature will maintain a comfortable 18°C (65°F). However, prepare for rain as the day unfolds, with precipitation likely to accumulate up to 4.8 mm in the evening, indicating a high chance of showers throughout the day. In fact, the chance of rain stands at 100%, so having an umbrella on hand is highly advisable.

Visibility will be significantly impacted in the early hours with fog reducing clarity to nearly zero. As daylight progresses, visibility will improve to around 10 km but will remain cloudy, with 83% cloud cover. The sunrise will occur at 5:28 AM, and sunset will be at 6:00 PM, providing just under 10 hours of daylight.

Wind speeds are light, with maximum gusts reaching 3-4 mph, originating from the Southeast. Due to these conditions, the UV index will be moderately low, registering a 1, but that still means a bit of protection is encouraged if you’re out during daylight hours.

For a more detailed view of the weather on Thursday, visit this link.

Friday, September 13, 2025 - Warmer Days Ahead

As we move into Friday, the weather will shift quite a bit. The maximum temperature will rise to a warm 29°C (84°F) with an expected low of 16°C (61°F). Perfect for outdoor activities, even with the looming possibility of occasional rain. The day will be mostly cloudy, and rain showers could appear intermittently, with a 75% chance of rain during the afternoon.

Expect to enjoy abundant daylight as the sun rises again at 5:29 AM and sets by 5:59 PM, offering nearly 10 hours of sun.

Humidity will remain relatively high throughout, making it feel a bit warmer. However, the real feel could reach 30°C (85°F) during the height of the day. Winds will be slightly stronger than Thursday, coming from the South and reaching around 9 mph.

For further insights on Friday's conditions, check out this link.

Saturday, September 14, 2025 - Transitioning to Pleasant Weather

Finally, on Saturday, Shiojiri will see a drop in temperature, with a maximum of 25°C (78°F) and a minimum of 15°C (60°F). The weather will shift towards clearer skies with less chance of rain, although light rain showers are still possible, especially in the afternoon.

The UV index will peak at 4, meaning moderate precautions are still recommended if spending extended periods outside. Winds will remain gentle, traveling at around 5 mph from the South-Southwest.

The sun will rise earlier at 5:30 AM and will set at 5:57 PM, granting ample daylight for weekend plans.

As we wrap up this weather overview, stay informed and prepared for a mix of rainy days and brief sunny spells. For the next 5 days’ weather, visit this link, and for an hour-by-hour breakdown, click here.

Stay safe and enjoy the beautiful scenes that Shiojiri has to offer, no matter the weather!