Your iPhone can notify you minutes before rain or snow starts — and again when it's about to stop. Most people have no idea this exists.

How to turn it on

1. Open the Weather app
2. Tap the ⋯ menu (top right)
3. Tap Notifications
4. Turn on Next-Hour Precipitation for your current location (and any saved locations you want)

You'll get a heads-up notification like "Rain expected in 10 minutes" — perfect for deciding whether to grab an umbrella before heading out.

Good to know

• Next-Hour Precipitation is available in the US, UK, Ireland, and parts of Australia and Europe
• You can also enable Severe Weather alerts from the same screen for storms, heat advisories, etc.
• Requires Location Services enabled for Weather (Settings → Privacy & Security → Location Services → Weather → Always)

For more details, see Apple's guide to weather notifications.