Home / Editor's Pick /

Understanding the app: How to read rain forecasts

08:00
9 May 2023

Understanding the app
How to read rain forecasts

Rainfall warning

A common question we get asked is what does the percentage of rain really mean in a weather app? Well, we’re here to debunk the misconceptions.

It is important to remember that the percentage shows the chance of rain at that time, in your forecast area.

A 30% chance means a 30% chance that it will rain in your forecast area, and a 70% chance that it will stay dry.

When there are showers in the forecast, rather than a solid band of rain, there is a great deal of uncertainty. This is because showers can be extremely localised, forming and dissipating over short time periods.

Often with showers, the chance of precipitation could be fairly low, but the risk could be throughout the entirety of the day.

So, if you’re unsure about whether you’re at risk of catching a shower, stay updated via our WeatherRadar, where you can see where the showers are developing real-time.

Weather & Radar editorial team
More on the topic
Split image showing a night-time waterfall beneath sweeping star trails on the left, and a bright double rainbow over a calm lakeside with mountains, pier, and mist on the right.
Sunday 30 November 2025

Your weather - Your shots

From rainbow light to starlight
Split image showing an alpine winter landscape and a European weather map with snow and rain areas.
Monday 1 December 2025

Winter begins today

Wintry weather only in a few places
A split image showing a close-up of a full moon on the left, and on the right a UK and Ireland weather map with blue and white patches indicating widespread rain or cloud. Several moon and cloud icons appear over different regions, with temperatures marked mostly between 4°C and 8°C.
Thursday 4 December 2025

Cold Moon rises tonight

Third and final supermoon of the year
All weather news
This might also interest you
Mammatus clouds
Thursday 21 August 2025

Unusual view

Mammatus clouds over Ireland
Split weather map showing UK wind speeds in orange-red shades up to 40 mph on the left and warning levels in green-yellow on the right, with a central wind warning sign.
Wednesday 22 October 2025

Warnings active

Storm Benjamin impacts the UK
plit image showing a double rainbow over a rocky shoreline on the left and sheep grazing in a green field under stormy clouds on the right.
Sunday 2 November 2025

Your weather - Your shots

Mixed conditions on an unsettled week
All articles
Weather & Radar

Weather & Radar is also available on

Google Play StoreApp Store

Company

Contact us Privacy Policy Legal info Accessibility statement

Services

Uploader

Socials

facebooktwitteryouTubelinkList