How to keep a weather and wellbeing diary

A simple daily checklist for noting how you feel next to the weather — and how to read it after a few weeks without fooling yourself.

What to note every day (under a minute)

Date and time of the note.
How you feel on one simple scale — for example good / okay / headache / bad.
Air pressure now (hPa) and whether it rose or fell over the last 24 hours.
Temperature and humidity, roughly.
Sleep — hours, and whether it was restful.
Other things that might matter to you: coffee, alcohol, skipped meals, stress, long screen time, travel.

A sample week

Day	Feeling	Pressure	24 h change	Sleep	Other
Mon	Good	1018 hPa	+2	7 h	—
Tue	Okay	1011 hPa	−7	6 h	Long day at screen
Wed	Headache	1002 hPa	−9	5 h	Skipped lunch
Thu	Okay	1006 hPa	+4	7 h	—
Fri	Good	1015 hPa	+9	8 h	—

Normal sea-level pressure is around 1013 hPa. Day-to-day changes of a few hPa are common; changes of 6–10 hPa or more within a day usually come with a weather front.

Why a diary and not a guess

Many people feel that the weather affects them — before rain, in a heatwave, when the wind changes. Memory is a poor witness here: we remember the bad day that came with a storm and forget the stormy days that were fine. A short daily note, written the same way every day, gives you something real to look at.

How to read it after a few weeks

Wait for enough notes. One week tells you almost nothing. Four to six weeks with a few weather changes is a reasonable start.
Count both sides. On how many bad days did the pressure drop sharply? And on how many sharp drops did you feel fine? Both numbers matter.
Look at the other columns too. If most bad days also had short sleep or skipped meals, the weather may not be the main reason.
Treat it as a hint, not a verdict. A pattern in your diary is a reason to pay attention — not proof of a cause.

What a diary can and cannot do

A diary helps you notice patterns and plan your day — a quieter evening, an earlier night, water within reach. It does not diagnose anything and it is not a treatment. If headaches are frequent, strong or new for you, talk to a doctor; your notes will make that conversation easier.

Making it effortless

The hardest part is not the analysis — it is writing the pressure down every day. Calmsky does that half for you: you tap how you feel, and it saves the air pressure from that very moment next to your note. It also shows the pressure 48 hours ahead and gives a gentle heads-up before a sharp drop. Calmsky is not a medical device and does not give medical advice.