Unlabeled

Red maples: when half the leaves turn, by latitude, 2016–2025

At 45.5° N in Wisconsin, a typical red maple was half turned by September 18; at 32.5° N in Alabama, not until November 22, 65 days later.

What does this axis measure?
What does this axis measure?
Red maples: when half the leaves turn, by latitude, 2016–2025: 26 points, a scatter chart.
Reveal the axesHide the axes
y ↑
Half the leaves turned (day of year)
x →
Latitude (degrees north)
Show the story, the data and the sourceHide the story, the data and the source
The data: 26 points
Latitude (degrees north)Half the leaves turned (day of year)
29.79289
30.32317
32.54326
35.46313
35.69310
36.21302
36.62300
37.38282
37.57307
38.35306
38.95318
39.12293
40.16299
40.86298
41.26284
41.75281
42.37292
42.54287
43.01272
43.69283
44.07276
44.9301
45.49272
45.5261
46.23275
47.14264
Source
USA National Phenology Network, Plant and Animal Phenology Data, Status and Intensity, red maple 'Colored leaves', Nature's Notebook observations; data provided by the USA-NPN and the many participants who contribute to its Nature's Notebook program; first half-turned day per tree and site medians calculated by Unlabeled
Licence
CC BY 4.0 (USA-NPN Data Use Policy); observers' visit-by-visit shares of colored leaves read from the NPN Data API, the day each tree first reached half and each site's median computed by Unlabeled
Read
2026-11-05
Drawn
26 points as the puzzle showed them · scatter
  • Ran in puzzle #42 on November 7, 2026. Play it