Articles — HistoricalClimate

Airports as Weather Stations: A Century of Standardization

Why the main airport is almost always the city's primary weather station — and why that choice shapes the data.

Aug 9, 2026

Compare the old normals to the new ones and the trend is visible. A short data-driven look.

Jul 31, 2026

USDA Plant Hardiness Zones and NOAA climate normals measure different things. Both are useful — but for different questions.

Jul 23, 2026

Averages smooth out reality. Here are three things normals miss — and how to read around them.

Jul 15, 2026

Considering a move or a long trip? A structured comparison beats reading two pages side by side.

Jul 7, 2026

The solar peak is June 21, but cities hit their hottest averages weeks later. Here's why.

Jun 29, 2026

Mountains wring moisture out of air. Rain shadows are the reason some American cities are lush and others arid.

Jun 22, 2026

Atlantic hurricane season runs June through November. The climate normals quietly reveal which cities take the hardest hits.

Jun 15, 2026

Every number on this site comes from a specific weather station — usually the city's main airport. Your yard is not the airport.

Jun 8, 2026

Minneapolis, Anchorage, and Buffalo all compete — but 'cold' means different things to each.

Jun 1, 2026

Every city page on this site has the same monthly table. Here's how to get the most information out of it in 30 seconds.

May 25, 2026

Oceans are temperature flywheels. They warm slowly in summer and cool slowly in winter — and coastal cities benefit.

May 18, 2026