KNMI

KNMI is the Koninklijk Nederlands Meteorologisch Instituut, which describes itself as a national knowledge institute for weather, climate and seismology. Its homepage logo names the Ministry of Infrastructure and Water Management alongside it. The KNMI-app is available for iOS and Android and is described as paid for with tax money; the explainer page states no price and mentions no advertising.

It shows warnings coded yellow, orange and red up to 48 hours ahead, flags possible dangerous weather up to seven days out, and offers a precipitation radar, hourly forecasts for today and tomorrow and daily forecasts up to 14 days. The pages we read do not state a country, although the institute and ministry are Dutch by name. Source code of the app has been on GitLab since late January 2025.

• Colour-coded warnings. Warnings come as code yellow, orange or red, issued up to 48 hours ahead. Possible dangerous weather is also flagged up to seven days ahead, which gives an earlier but looser signal.
• Saved places. Users can save places under Mijn plaatsen and get push alerts for dangerous weather. Code red and orange alerts are on by default, while code yellow has to be switched on.
• Precipitation radar. The radar shows rain from two hours in the past to two hours ahead. That window is useful for deciding whether to leave now, but says nothing about the rest of the day.
• Hourly and daily forecasts. Hourly forecasts cover today and tomorrow and daily forecasts run up to 14 days. Anything beyond tomorrow is therefore shown only at daily resolution.
• Approximate location. The app asks for a location within a few kilometres, and using location is optional. Saved places let people use it without sharing a position at all.
• Open source code. The app source has been published on GitLab since late January 2025, and the Android package ID is nl.knmi.weer. Technically minded users can inspect how the app is built.
• Reusable content. Site content is covered by a CC0 dedication, and reuse requires attribution to bron: KNMI. That lowers the barrier for websites quoting the institute's material.

• A commuter in the Netherlands. The two-hour past and future radar shows incoming rain before a bike ride, and code orange or red alerts arrive by default for saved places.
• A privacy-conscious user. Location is optional and approximate, and the privacy statement says location data is not shared, sold or disclosed to third parties, including for advertising or analysis.
• A developer or journalist reusing content. Because site content is under CC0 with attribution to bron: KNMI, short extracts can be quoted with little legal friction, and the app code can be read on GitLab.

The app is available for iOS and Android, and the homepage links to the App Store and Play Store. After installing, you can save places under Mijn plaatsen and decide which alert levels you want pushed to you. Code red and orange are on by default, and code yellow is optional.

Allowing location is optional, and the app only asks for an approximate position within a few kilometres. The pages we read do not describe an account, a sign-up step or setup time. Because no account is mentioned, the quickest route is to install, add one or two places and review the alert settings.

KNMI is the Royal Netherlands Meteorological Institute, a knowledge body under the infrastructure ministry, and its app is described as paid for with tax money.

It issues code yellow, orange and red warnings up to 48 hours ahead and flags possible danger seven days out. The radar spans four hours in total and hourly forecasts stop at tomorrow. Source code has been on GitLab since January 2025.

In our weather apps ranking KNMI stands at #8 of 12: the products next to it are DWD WarnWetter above and Yr below. No numeric score is attached; established products follow the challengers in their ranked order.

The vendor states no country of establishment, so KNMI is left out of the regional count for this list.

Save places under Mijn plaatsen and alerts follow: red and orange are on by default, yellow is optional.

Radar runs two hours back and two hours ahead, and daily forecasts reach 14 days.

The explainer says location data is not shared, sold or disclosed to third parties, including for advertising or analysis.

Site content is dedicated under CC0 with attribution as bron: KNMI.

Android users find the app under the package nl.knmi.weer.

Charging model: Funded from public money; the explainer page states no price and mentions no advertising.

The explainer page describes the app as betaald met belastinggeld, paid with tax money, and states no price. It also does not mention advertising. We therefore cannot quote a charge, a subscription or in-app purchases, and the pages we read name none. Funding comes from public money, which means the app is not a commercial product competing on price. Content on the site is covered by a CC0 dedication, with attribution to bron: KNMI requested for reuse. If you plan to build on the institute's material, that dedication matters more than any fee schedule, since no licence payment is described.

Source: the pricing material on knmi.nl, as read for Best Weather Apps in 2026 and last reviewed on 13 November 2026.

The privacy statement says location data is not shared, sold or disclosed to third parties, including for advertising or analysis. It names no controller and no postal address and refers to a Privacy Coordinator reachable through a contact form.

The app asks only for an approximate location, and location use is optional. The source code has been on GitLab since late January 2025, so the behaviour can be inspected. Hosting location, retention periods and certifications are not described on the pages we read.

Integrations the vendor names (8):

• Apple App Store
• Google Play Store
• GitLab source code
• Push notifications
• Mijn plaatsen saved places
• Precipitation radar
• Warning levels yellow, orange, red
• CC0 content reuse

5 products in this guide come closest to KNMI on tags, pricing and region.

• Foreca (#5 of 12): Forecast site with a 15-day view, calendar feed and weather API. Watch out: the terms disclaim liability for decisions based on content, so Foreca is no basis for safety-critical choices.
• Meteoblue (#6 of 12): Basel forecast house using a many-model blend, now majority owned by Windyty. Best for: Buyers who value a long-running Basel modeller and public documentation.
• Yr (#9 of 12): Norwegian broadcaster and met institute forecasts for ten million places.
• Meteo-France (#10 of 12): French national weather service with vigilance alerts and 15-day forecasts. Best for: French residents and sailors wanting official vigilance plus marine and mountain pages.
• Weather Channel (#12 of 12): Not for: smaller buyers who want a transparent price list or a single-purpose tool. Ad-supported US forecast site with radar, allergy and air tools.

Read from the vendor’s own pages on 12 November 2026.

• knmi.nl/home: Institute description and ministry named in the logo
• knmi.nl/kennis-en-datacentrum/uitleg/knmi-app: Warnings, saved places, radar window, forecast ranges, location, funding wording and GitLab code
• knmi.nl/privacy: Location data not shared or sold, no controller or address named
• knmi.nl/copyright: CC0 dedication and attribution to bron: KNMI

Feature lists tell little, so positions rest on setup effort, the true price, portability and fit. That puts KNMI at #8 of 12. Method and commercial relationships are in our editorial process.