Guides
Guides to reading the temperature
Explanations rather than forecasts. Each guide answers one question completely — what the number means, where the thresholds actually sit, and what to do with the answer.
- How to type the degree symbol Shortcuts for every device, and the lookalike characters that quietly break your text.
- What temperature pipes freeze at The real threshold is near 20 °F, not 32 °F — and how many hours of it you can take.
- How to keep pipes from freezing An ordered checklist for tonight, the summer jobs, and the measures that waste your time.
- Wind chill, explained The chart, the formula, the frostbite times — and why wind chill says nothing about your pipes.
- What "feels like" means One label, two formulas, and a rule for which of the two numbers your decision actually needs.
- Is Apple Weather accurate? Where the data comes from, and the difference between a wrong forecast and a distant one.
- iPhone weather widgets Home Screen, Lock Screen and StandBy, size by size — plus why a widget looks stale.
- Window condensation Inside, outside, or between the panes — three problems, and only one is a fault.
- Ideal indoor temperature Comfortable, safe and cheap are three different numbers. Here is each one.
- What counts as below freezing Zero in both scales, and why water freezes above it and stays liquid below it.
- Coldest temperatures recorded The station records, the satellite readings, and why they are different measurements.
- Weather in April The month of the late frost. Growth is well underway and soft, which makes April frosts more damaging than colder January ones.
- Weather in August Often the warmest month at the coast, because the sea has finally caught up, while inland has already started cooling.
- Weather in December Shortest days of the northern year, but not yet the coldest — the cold is still accumulating.
- Weather in February Often colder than January in continental interiors, and the month with the widest gap between what the calendar implies and what the air is doing.
- Weather in January The coldest month across most of the northern hemisphere, and the one where the lag between the shortest day and the coldest day becomes obvious.
- Weather in July The warmest month for most of the northern hemisphere, and the one where humidity rather than temperature decides how it feels.
- Weather in June Longest days of the northern year, but not the warmest — another instance of the lag between light and heat.
- Weather in March The most variable month of the northern year. March can deliver a hard frost and a shirtsleeve afternoon in the same week.
- Weather in May Comfortable days, cool nights, and the month most travel guides quietly recommend for the northern hemisphere.
- Weather in November The steepest decline of the year in continental climates — often six to nine degrees colder than October in the same place.
- Weather in October The month the first frost usually arrives in the northern tier, and the month evening events start needing coats.
- Weather in September Warm days and rapidly cooling nights. The month where the chilling threshold matters more than the frost date.
- First frost dates It is a 50 percent probability, not a deadline. Half of all years frost earlier.
- The extreme cold scale One ordered scale from a cold night to absolute zero, with what freezes at each step.
- Why your street differs Five reasons a correct forecast is still wrong in your garden.
- Temperature inversions Cold air under warm — why valleys frost first and mornings turn foggy.
- Best time of year to visit Choose by climate type, not destination list, so the reasoning travels anywhere.
- Mount Washington weather Three air masses, one summit, and the wind record that stood for 62 years.
- What is a cold front? What passes and in what order — and how to tell it has happened.
- Guides Plain explanations of the temperature questions that come up around a house, a garden and a forecast: freezing pipes, wind chill, feels-like, condensation and frost.