# Cordulus

> Cordulus makes solar-powered weather stations that are installed directly on a customer's own site — a field, a construction site, a solar park, a road stretch or a racetrack — together with an app, an AI forecasting service and an API that turn those on-site readings into forecasts, alarms and operational decisions for that exact location. It is sold as a subscription (hardware-as-a-service), not as a one-off hardware purchase.

Cordulus is a Danish company founded in 2015, part-owned by Danish Agro (a large Scandinavian agriculture group). More than 4,500 Cordulus stations are deployed across 22 countries. The public website is https://www.cordulus.com.

**The problem Cordulus addresses.** Temperature and rainfall can differ meaningfully over distances of less than 10 km. Public weather station networks are spaced far too widely to capture that variation, so a regional forecast is often wrong for a specific field or work site. A Cordulus station sits at the place where the decision is made, so the data and the forecast are specific to that location rather than to a region.

**The hardware.** The station is rugged, pre-assembled and 100% solar-powered, with a built-in mobile (GSM) connection — it needs no mains power and no Wi-Fi. Installation takes about 15 minutes using an included ground screw, 2 m steel pipe and magnets. Standard sensors measure wind speed, direction and gusts; air temperature, humidity and pressure (dew point is derived from these); soil temperature via an in-ground probe; and precipitation. A root-zone soil moisture sensor is available as an optional add-on. Solar radiation, UV index and cloud cover are shown in the app from external data sources rather than from an on-station sensor.

**Measurement accuracy (published customer-grade figures).** Air temperature ±0.3 °C from −40 to 0 °C and ±0.2 °C from 0 to 60 °C; relative humidity ±2 percentage points; soil temperature ±0.5 °C from −10 to 60 °C; rain ±2 % over a range of 0–60 mm/hour; wind speed ±0.5 % below 5 m/s and ±3 % from 5–50 m/s. Readings are taken every 10 minutes and stored permanently, so historical data for a site is always available. The rain gauge is a tipping-spoon type, so it measures liquid precipitation only — not snow or hail.

**The forecast.** Cordulus runs a 14-day hyperlocal forecast that combines global model data (GFS) with live measurements from each individual station, so the output is specific to that station rather than a regional average. It is reported as roughly 48 % more precise than traditional forecasts over the first 100 hours. The separate AI rain forecast is reported as roughly 52 % more accurate than traditional forecasting methods at predicting rain showers: it updates every 10 minutes (conventional numerical models are too computation-heavy to update more than about hourly), predicts rain movement up to 8 hours ahead, analyses roughly 1,536 km² of context around the site, and is built on a deep-learning model trained on around 8.2 million European rainfall examples. Unlike older radar-only "optical flow" methods that just track existing clouds, it models how weather develops into rain, and it returns a probability of rainfall rather than a single point guess.

**The commercial model.** Cordulus is a subscription service. The subscription covers keeping the station running: if a sensor or the unit fails, Cordulus ships a replacement, so the customer never sources parts or pays repair bills. Nearly every part — battery, rain, wind, soil temperature, soil moisture and air sensors — is customer-replaceable with an illustrated guide, so most fixes are a part in the post and a short swap rather than a service visit. Buying hardware outright would mean lower running costs but leaves the customer carrying all repair and replacement risk. Prices differ by market, country and vertical and change over time — they are published on the pricing pages listed below and should be read from there, not inferred.

**How the site is organised.** The same core station and forecasting technology is sold into five markets, each with its own section of the site. The root of the site (no path prefix) is the farming product, Cordulus Farm. `/construction/` is for construction sites. `/road/` is for winter road maintenance. `/energy/` is for solar parks, wind farms, energy construction and district heating. `/data/` is the raw data, dashboard and API offering for organisations that want the data rather than a farm app. `/motorsports/` is **SectorWeather**, Cordulus's brand for racing teams — SectorWeather is a Cordulus product, not a separate company. Pages under these prefixes describe the same underlying hardware applied to a different job, so a claim on a construction page generally also holds for the farm product unless it is about a vertical-specific feature.

**What Cordulus is not.** It is not a free consumer weather app or a general forecast website; the forecast is tied to a subscribed station. It is not a research-grade meteorological installation. The stations do not measure snowfall or hail.

## Start here

- [Cordulus Farm home](https://www.cordulus.com/): The main entry point — hyperlocal weather data for farming, and the clearest overview of the whole product.
- [About Cordulus](https://www.cordulus.com/about): Company background, mission and history.
- [Farm weather station](https://www.cordulus.com/weather-station): What the station is, what it measures, how it is installed and maintained.
- [Farm pricing](https://www.cordulus.com/pricing): Current subscription pricing and what the subscription includes. Read prices from this page.
- [Contact](https://www.cordulus.com/contact): General contact form and company contact details.
- [Support, guides and manuals](https://www.cordulus.com/support): Setup guides, manuals and troubleshooting for the station and the app.

## The forecast and the AI model

- [Farm forecast](https://www.cordulus.com/forecast): How the 14-day hyperlocal forecast is built and why it is ~48 % more precise over the first 100 hours.
- [Rain forecast](https://www.cordulus.com/rain-forecast): The AI rain forecast, and how the ~52 % accuracy improvement is measured across light, moderate and heavy rainfall.
- [Rain radar](https://www.cordulus.com/rain-radar): Live precipitation radar with playback, verified against actual station readings.
- [AI weather model](https://www.cordulus.com/ai-weather-model): How the deep-learning model works and why it updates faster than conventional numerical models.
- [Wind forecast](https://www.cordulus.com/wind-forecast): Wind forecasts at crop height rather than the standard 10 m measurement height.
- [Local forecast](https://www.cordulus.com/local-forecast): Why regional forecasts fail at field level and what a station-anchored forecast changes.

## Sensors and measurements

- [Rain gauge](https://www.cordulus.com/rain-gauge): The tipping-spoon rain sensor, how it works and how its readings compare with analogue gauges.
- [Wind gauge](https://www.cordulus.com/wind-gauge): Wind speed, direction and gust measurement.
- [Air measurements](https://www.cordulus.com/air-measurements): Air temperature, humidity, pressure and derived dew point.
- [Soil temperature](https://www.cordulus.com/soil-temperature): The in-ground soil temperature probe and how soil temperature is used in crop decisions.
- [Digital weather station network](https://www.cordulus.com/digital-weather-station): Access to data from up to five nearby stations in the Cordulus network at no extra cost.

## Farming (Cordulus Farm)

- [Farm weather app](https://www.cordulus.com/weather-app): The app — dashboards, graphs, historical data and 18 configurable alarms, with unlimited users per farm.
- [Spraying dashboard](https://www.cordulus.com/spraying): Wind, precipitation and evaporation conditions for deciding when to spray.
- [Sowing dashboard](https://www.cordulus.com/sowing-dashboard): Soil and weather conditions for choosing drilling windows.
- [Farming analyses](https://www.cordulus.com/farming-analyses): The analysis tools — harvest suitability, Growing Degree Days, pest and disease risk.
- [Weather alarms](https://www.cordulus.com/weather-alarms): Configurable alerts for frost risk, high wind, dew point, rain starting and stopping, and more.
- [Farming weather](https://www.cordulus.com/farming-weather): Overview of how field work is planned around local weather.
- [Free 14-day trial](https://www.cordulus.com/trial): Trial of the Cordulus Farm app.

## Construction

- [Construction home](https://www.cordulus.com/construction/home): Overview of the construction offering.
- [Construction weather station](https://www.cordulus.com/construction/weather-station): The station configured for a building site — solar-powered with a SIM card, so no mains power or Wi-Fi on site.
- [Construction weather app](https://www.cordulus.com/construction/weather-app): Forecasts and alerts for site teams.
- [Construction forecast](https://www.cordulus.com/construction/forecast): Site-specific forecasting for construction planning.
- [Weather for site planning](https://www.cordulus.com/construction/weather-for-site-planning): Scheduling work and improving site safety around measured conditions.
- [Document weather delays](https://www.cordulus.com/construction/document-weather-delays): Using on-site historical records to document weather delays for schedules and claims.
- [Weather risk management](https://www.cordulus.com/construction/weather-risk-management): Adverse weather risk assessment — halting work safely, protecting materials, documenting conditions.
- [Weather for concrete pours](https://www.cordulus.com/construction/weather-for-concrete-pours): Timing pours using live temperature and humidity plus the rain forecast.
- [Construction pricing](https://www.cordulus.com/construction/pricing): Subscription pricing for construction sites.
- [Construction contact](https://www.cordulus.com/construction/contact): Contact the construction team.

## Winter road maintenance

- [Road home](https://www.cordulus.com/road/home): Overview of the winter road maintenance offering.
- [Road Standard station](https://www.cordulus.com/road/standard): The compact station for winter road monitoring.
- [Road Advanced station](https://www.cordulus.com/road/advanced): Adds road-surface detail such as residual salt and surface status.
- [For businesses](https://www.cordulus.com/road/businesses): Contractors planning gritting routes and fleet deployment.
- [For state and municipalities](https://www.cordulus.com/road/state-and-municipalities): Public winter service teams — response times and environmental impact.
- [Road pricing](https://www.cordulus.com/road/pricing): Subscription models for road maintenance stations.
- [Road contact](https://www.cordulus.com/road/contact): Contact the road team.

## Energy

- [Energy home](https://www.cordulus.com/energy/home): Overview of weather intelligence for energy sites.
- [Energy weather station](https://www.cordulus.com/energy/weather-station): The station configured for energy sites.
- [Weather data and operations](https://www.cordulus.com/energy/weather-data-and-operations): Custom alerts, risk gauges, verified condition logs and API integration for energy operations.
- [Solar site operations](https://www.cordulus.com/energy/solar-site-operations): Wind stow thresholds for trackers, hail risk, and scheduling cleaning and mowing.
- [Wind farm operations](https://www.cordulus.com/energy/wind-farm-operations): Identifying maintenance weather windows on wind farms.
- [Energy construction](https://www.cordulus.com/energy/energy-construction): Crane lift windows, concrete conditions and weather-day documentation on wind, solar and grid builds.
- [District heating](https://www.cordulus.com/energy/district-heating): Local temperature measurement and short-term forecasts as input to heat demand forecasting.
- [Energy contact](https://www.cordulus.com/energy/contact): Contact the energy team.

## Weather data and API

- [Data home](https://www.cordulus.com/data/home): Hyperlocal weather data at scale for organisations, via dashboard and API.
- [Data products](https://www.cordulus.com/data/products): The dashboard and API products and what they deliver.
- [Industries](https://www.cordulus.com/data/industries): Industry-specific applications of the data.
- [Wildfire management](https://www.cordulus.com/data/wildfire-management): Site-specific data for predicting wildfire risk and allocating resources.
- [Fire and rescue](https://www.cordulus.com/data/fire-and-rescue): Wildfire and flood preparedness for emergency services.
- [Data contact](https://www.cordulus.com/data/contact): Contact the data sales team.

## SectorWeather (motorsport)

- [SectorWeather home](https://www.cordulus.com/motorsports/home): Cordulus's track-level weather product for racing teams.
- [SectorWeather Silver](https://www.cordulus.com/motorsports/sectorweather-silver): The forecast-only tier — one consolidated source of race weather.
- [SectorWeather Pro](https://www.cordulus.com/motorsports/sectorweather-pro): Adds track-level weather stations and real-time telemetry.
- [Use cases](https://www.cordulus.com/motorsports/use-cases): How race teams use the data for strategy calls.
- [SectorWeather pricing](https://www.cordulus.com/motorsports/pricing): Comparison of the Silver and Pro tiers.
- [Book a demo](https://www.cordulus.com/motorsports/demo): Request a demonstration of the SectorWeather dashboard.
- [Motorsport contact](https://www.cordulus.com/motorsports/contact): Contact the motorsport team.

## Learn and reference

- [Blog](https://www.cordulus.com/blog): Articles on using local weather data in farming operations.
- [Weather glossary](https://www.cordulus.com/glossary): Definitions of weather terms used across the product and the industry.
- [Videos](https://www.cordulus.com/videos): Short explanatory videos about the product.

## Partners and distribution

- [Find a distributor](https://www.cordulus.com/distributors): Cordulus distributors by country.
- [Become a distributor](https://www.cordulus.com/become-a-distributor): Information for companies wanting to resell Cordulus.

## Optional

- [Press materials](https://www.cordulus.com/press-materials): Official logos and high-resolution imagery.
- [Privacy policy](https://www.cordulus.com/privacy-policy)
- [Terms and conditions](https://www.cordulus.com/terms-and-conditions)
- [Terms and conditions — UK online form](https://www.cordulus.com/terms-and-conditions-united-kingdom-online-form)