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Speedwell Recalibrated data sets re-base historical data to current reference site conditions by correcting for discontinuities arising from site moves or instrument changes.

Generate graphs of up to 50 years of historical weather data. Or graph the difference between two sites.

A real-time grid showing how a range of weather reference sites are performing against their proxies.

Extract weekly, or monthly statistics such as cumulative temperature, HDDs, CDDs.

Monitor the behaviour of a weather reference site against its synthetic proxy in real time. Critical for understanding energy reference sites or weather derivatives sites.

Visualise the evolution of a weather variable over any period and compare with averages, extremes and last year at the click of a button.

Definitive feeds of observed weather data available as hourly, daily or as weekly/monthly summaries.

Interrogate our extensive historical archive to find historical patterns: e.g. understand the chance of seeing a warm February after a cold January.

Access data sets going back to 1900 for correlation analysis.

Calculate the historical values of any weather index

See our list of standard data packs

Speedwell carries archived data for 1000s of sites worldwide. View our dataset availability here.

Probabilistic forecasts and historic datasets based on weighted baskets of user specified reference sites.

Calculate daily, monthly correlations and auto-correlations.