What is the maximum temperature for hiking?

There is no value that holds for everyone: it is the temperature beyond which your day stops. Every household has its own; ours is around twenty-four degrees, and above it we no longer walk in the afternoon.

How do you find your heat ceiling?

Find the last summer when you stopped going out in the afternoon, look up the maximum temperature of those days in a record, and write it down in degrees. Then, on hourly records, count the hours of your activity day that stay below that ceiling.

Is the north always cooler?

What decides is not the region but the temperature beyond which your day stops. A place further north does not guarantee a usable day; read it in records, at the exact spot of the trip.

What is your heat ceiling?

Your heat ceiling is the maximum temperature beyond which your day of travel stops working. It is not a matter of comfort: it is time lost.

Every household has one, and most people know theirs without having put it into words: it is the temperature of the last summer when you stopped going out in the afternoon.

A temperature, not a region

Looking for “somewhere cool” by region tells you nothing about your day. What decides is not where you go, it is the temperature beyond which the day stops. It isn't the north you're looking for develops the idea, and the definition is the temperature ceiling.

What heat takes away: hours

The ceiling translates not into comfort but into time you can actually use: what is left of a day once the heat has been taken out. The consequence nobody anticipates: a long trip somewhere hot can contain less usable time than a shorter trip somewhere cool. Heat does not make a trip less pleasant, it makes it shorter.

Under a Nordic sky, by contrast, it stays light so late that you can set off again after dinner.

Finding your ceiling

Five moves.

Find the last summer when you stopped going out in the afternoon. That is your ceiling, as you know it without having put it into words.
Put it in degrees. Look up the maximum temperature of those days in a record, and write it down. A ceiling in impressions can be compared with nothing.
Read the hourly records for the month you are considering, not the monthly average. Count the hours of the activity day that stay below your ceiling. Prefer recent records to climate normals, which already lag behind the current climate.
Compare that usable time with the day your programme assumes. A programme that assumes a long day outdoors is not the same programme depending on how many hours stay below your ceiling. Is your itinerary too packed? gives the counts to run on everything else.
Decide. Move the day to the morning, shorten it, or change month or zone.

As a benchmark: ours is around twenty-four degrees (our trips), and above it we no longer walk in the afternoon. Yours is probably somewhere else.

What the ceiling does not say

The ceiling says nothing about rain, wind or crowds. Rain is counted separately, in rain hours. A valley and the pass next to it do not share a climate: check the exact spot before booking.

Rain is counted separately, in hours: Rain days or rain hours?.

What you can do with it

You are preparing a trip. In the itineraries we calculate, the heat ceiling is a parameter you choose, like the duration or the daily load. Early access.
You are an operator or a software vendor. The heat ceiling is one of the parameters the engine takes as input. The engine, demo and API.

What we do not know

The benchmark is ours, and the ceiling is a parameter of the engine, set per traveller: we give no value that holds for everyone.

We express the ceiling as air temperature. We have not measured the effect of humidity, shade or altitude on yours.

Ours holds for walking. We do not know whether it changes for a city visit or a day in the car.

Method definition and personal benchmark from our trips. No climate figures are used on this page.

A figure looks wrong to you, or your own ceiling says something else? Write to us — corrections are published.

Method — Method definition and personal benchmark from our trips. The ceiling cited, around twenty-four degrees, is a parameter of the engine, set per traveller; no climate figures are used on this page.