Climate drives among-year variation in natural selection on flowering time

In total, we recorded 2411 flowering events, and followed 606 individuals 1987–1996, and 228 individuals 2006–2017. climate_1961_2017: This data set includes climatic data from nearby stations for the period 1961-2017. Weather data for March, April and May 1961–2017 was obtained from the Swedish Meteorological and Hydrological Institute (www.smhi.se (smhi.se/) ). Daily mean, minimum and maximum temperature values were averaged from two meteorological stations: Oxelösund (58.6777 N, 17.1223 E, 41 km from the study population) and Södertälje (59.2142 N, 17.6289 E, 29 km from the study population).

Daily precipitation values were obtained from a third station located in Åda (58.9279 N, 17.5358 E, 5 km from the study population). We calculated 12 variables from weather data: monthly averages of daily minimum, mean and maximum temperatures, and monthly sums of precipitation, for March, April and May in the year of flowering. See the article for further information.