era5.temp.rh.wind.extract: Temperature, RH, and Wind extraction
In benkraj/ERA5.helpers:

This function allows you to extract out just the Temperature, RH, and Wind from ERA5 data—can be used with map to do many points on a grid (but beware of too many files open)

1	era5.temp.rh.wind.extract(latitude, longitude, date.start, date.end)

`latitude`	Latitude of point (it will find closest ERA5 grid point)
`longitude`	Longitude of point
`date.start`	Start of ERA5 data—NOT date of interest—date in file
`date.end`	As above

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dry.2015 <- map2_dfr(grid.subset2$Var1, grid.subset2$Var2, era5.temp.rh.wind.extract, date.start = "2015-03-01", date.end="2015-05-31")
This is pulling out all temps, RH, and winds (converting to u/v wind) for each point in the grid from every night of interest.