Historical weather data for Basel can be downloaded freely without any restrictions.
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Start year
Start month
Start day
Number of days
Pick a starting month and day, and then select the number of days that should be compared.
Your activated locations are listed here. You can switch to another location by clicking on the name, or compare data with the current location by checking the box.
Variable
Parameter for growing degree days (GDD)
Adjust base and limit parameter for growing degree calculation. A limit-value lower than base, calculates the temperature cold sum.
Aggregatation
Units
This "GDD forecast" analyses past years and combines regular and seasonal forecast. Seasonal GDD forecasts can be compared with characteristic past years to estimate if the upcoming season will be warmer, colder or roughly the same.
meteoblue NEMS or ECMWF ERA5 are used as a base for analysis. Seasonal weather forecasts are displayed from various national weather services to give a wide overview. The GDD forecast graph contains 4 sections:
As a general recommendation seasonal forecasts should be used with care. The presented GDD forecast is merely a trend to estimate how this season might develop. Please consider some recommendations: