Chicago Fall Colors in Context: Using GHCNd Data!#

Tonight, Ben Blaiszik (@BenBlaiszik) mentioned the following:

Ben fall picture

So, I sat down to see if I could answer this question, using the Global Historical Climatology Network daily (GHCNd) dataset.

The Data#

This dataset is commonly used for calculating climatological normals, with long records and worldwide spatial coverage. It is provided by NOAA, with a version stored on the cloud (Amazon Web Services).


We use calendar for months, core components of the scientific python stack, hvplot for visualization, Dask for parallel and distributed computing, and Cartopy for mapping.

import calendar

import numpy as np
import pandas as pd
import holoviews as hv
import hvplot.pandas
from distributed import LocalCluster
import as ccrs