Should I open my windows today?

We check the air quality, humidity, temperature and rain where you are, then give you a Yes, No or Wait. Windows are usually fine to open when the air is clean, the day is comfortable and it's not raining.

Is Open Window Today free?

Yes, all 32 cards are free with no sign-in needed. We support the site with ads and Amazon affiliate links when we recommend products.

How does the migraine card work?

It watches for sudden drops in air pressure, which is a known migraine trigger. When a big drop is coming, the card warns you so you can take medication early.

What air quality is safe for opening windows?

Under 100 on the air quality scale is generally safe. Under 50 is great. Above 100 we'd suggest keeping windows closed.

Can I dry clothes outside today?

We check the humidity, wind and rain. If it's dry enough, breezy enough and not raining, you get a Yes.

Is it safe to go outside if I have asthma?

The asthma card checks the air quality, the temperature and the humidity, and tells you Yes, No or Wait with one line on why.

What countries does Open Window Today work in?

120+ countries. Search any town, suburb or city and you'll get a result.

Can I use it offline?

Yes, install it on your phone via Add to Home Screen. It works offline with the last data it loaded.

Open Window Today, Know exactly what to do at home, right now

Example · Results update live for your city

🪟Yes ✓

Open your windows?

AQI 38 and 22°C. Clean air at a comfortable temp. Open up.

👕Yes ✓

Dry clothes outside?

48% humidity and 14 km/h. Ideal drying conditions.

🌿No ✗

Water the garden today?

Rain is watering your garden. Save the water.

💊Wait ⏳

Migraine risk today?

Pressure dropping 4 hPa. Moderate change. Stay hydrated.

⚡

Answers in one second

No menus, no setup. Just type your city and tap.

🔒

Your data is yours.

We never sell your location. Nothing shared, ever.

🌍

Works anywhere

120+ countries. Search any town, suburb or city.

📅

See the next 48 hours

Tap any time slot to see how today's answer changes.

Type your city above and tap →. All 32 cards update live

How it works

Type your city

We look at conditions for your exact location, not a regional average. Your street, your air, your home.

We read 8 live signals

Real-time AQI, temperature, humidity, wind, rain, UV and pressure, fetched fresh every search. Pollen risk is derived from these conditions, not live sensors.

Get 32 instant cards

Yes, No, or Wait. Each card gives you one clear reason you can act on immediately. No numbers. No jargon.

Share with anyone

Share any card to WhatsApp, X, Facebook or Telegram in one tap. Perfect for daily check-ins with family.

People who use it every day

Early users · 2026

"The migraine card honestly changed my life. I take my pills earlier on pressure-drop days now. Way fewer headaches this year."

Rachel S.

London

"I have asthma. I check this every morning before I open the windows or go for a walk. On bad days it reminds me to grab my inhaler. Simple and useful."

Priya M.

Mumbai

"The solar card is the surprise winner. I now run the washing when it says yes. My power bill is genuinely lower. Didn't expect that from a weather site."

Lena W.

Berlin

"I garden a lot and the watering card saves me from overwatering. It tells me when rain is coming so I don't waste water. Small thing, but I check it daily."

Tom H.

Brisbane

"During bushfire season this was the first thing I opened each morning. Knowing the air quality before letting the kids out made a real difference for us."

Sarah K.

Sydney

Common questions

How is this different from a weather app?

A weather app shows you the temperature. We tell you what to do with it. We take the live data and give you 32 simple Yes/No answers: should I open my windows, hang the washing, walk the dog, water the garden? Just decisions, no homework.

How do you decide if I should open my windows?

We check five things: the air quality, how humid it is, how warm it is, whether it's raining, and whether it's snowing. All five have to be okay for a Yes. If even one isn't, we tell you a No and explain why in one line.

Why does the migraine card work the way it does?

Sudden drops in air pressure are a known migraine trigger. We compare today's reading to what's coming next. When the drop is big enough to bother people who get pressure-related migraines, we flag it, so you can take your medication early.

What does "air quality" actually mean?

It's a number that tells you how clean the air is. Under 50 is great. Over 100 and we'd say keep your windows shut. We show it as Good, Moderate or Poor so you don't have to remember any numbers.

Does this work where I live?

Probably yes. We cover 120+ countries. Type any city, suburb or small town and you'll get a result. The thresholds we use work the same in tropical, temperate and cold climates.

Do I need to sign up?

No. All 32 cards are free, no account needed, no email asked. Just type your city and get answers.

Can I save my favourite cities?

Yes, tap the 📌 Save city button. Your saved cities live on your phone, not on our servers. Save your home, your office, your parents' place, wherever you're heading on holiday.

How fresh is the data?

Every search pulls live data: temperatures, air quality and rain are all current. We also show the next 48 hours so you can plan ahead. Tap any time slot to see how the cards change.

How accurate is the pollen card?

Honestly, it's an educated guess. There are no pollen sensors in most places, so we use weather signs that usually mean high pollen: warm, dry, breezy days with no rain. It's right most of the time but not as accurate as a local pollen service. If you have severe hay fever, double-check with your local allergy authority. We label this card as "Estimated" so you always know.

Know what to do
before you step outside

How it works

People who use it every day

Common questions

Practical guides for real decisions

Know what to dobefore you step outside

How it works

People who use it every day

Common questions

Practical guides for real decisions

Know what to do
before you step outside