"It's Raining? [Rain Cloud Radar - Know When and How Much It Will Rain]" is a free application designed to provide you with real-time information on rainfall, helping you make informed decisions to avoid getting caught in the rain. Whether you're planning a jog, heading to the store, or simply trying to keep your laundry dry, this app is here to assist you.

Use Cases

This app is incredibly handy in various scenarios:

Jogging: Is it going to rain while you're planning to jog?
Convenience Store: Want to head to a convenience store but unsure when the rain will stop?
Travel: Are you considering whether to stay or leave during a cloudy day at your tourist destination?
Umbrella: Is it okay to use a folding umbrella?
Shelter: Can you make it through if you seek shelter from the rain?
Laundry: Want to bring in your laundry before unexpected rain?
Morning Run: Should you wake up early tomorrow due to anticipated rain?
Workout: Don’t want to run in the morning, but will it clear up?
Travel Weather: What’s the weather like at your travel destination?
Heavy Rain: Will heavy rains worsen?

Key Features

Precipitation Graph

This feature provides a clear view of the peak times of rain. You can easily determine how much rain is expected in the next few minutes and when it will stop. There’s no need to manually adjust the time; simply tap on the graph to see the state of rain clouds at any given moment.

Is It Raining Now? Notification

Receive notifications about expected rainfall and timing at your current location. This helps you prepare by bringing in laundry or securing items before sudden rain. Notifications are designed not to trigger while traveling at high speeds, ensuring you’re not disturbed unnecessarily.

Heavy Rain Notification

Stay updated every time heavy rain escalates. This feature aids in disaster preparedness.

Will It Rain Tomorrow? Notification

Get alerts about potential rain at your specified location and time tomorrow. Useful for deciding whether to run or wake up early. If forecasts change, you’ll receive updates to help you reschedule accordingly.

Pinpoint Weather

View weather conditions up to five days ahead, every three hours. Specify locations across Japan by long-tapping anywhere. Ideal for planning activities and checking weather at your travel destinations.

Specify Expected Rainfall

Set thresholds for notifications, such as ignoring light showers under 2 mm/h. Perfect for those who prefer minimal disruptions.

Automatic Adjustment of Rain Cloud Concentration

Automatically adjusts the density of rain clouds on the radar map based on local rainfall amounts, making it easier to read. Manually adjust the darkness to your preference.

Tap All Over Japan

Long-tap any location in Japan to check rainfall amounts and observe changes in the precipitation graph to identify peak times.

Features for Runners and Cyclists

Includes modes to automatically update the rain cloud radar and graphs to the current time and location, allowing you to check rainfall conditions no matter where you are.

Permissions

Location Information

Used for displaying current rainfall information and sending notifications about rain at your current location. Even without granting permission, most features can still be accessed using the “Fix Your Location” setting.

The forecast rainfall graph and rain cloud radar images are created using high-resolution precipitation nowcast data from the Japan Meteorological Agency.
Map data utilizes Google Maps Platform.
Pinpoint weather information leverages Open Weather Map and DarkSky web services.