Should I open my windows today?

Open Window Today checks your local AQI, PM2.5, humidity, temperature and rain in real time, then gives you a plain-English Yes, No or Wait — so you always know the right call. Windows should be open when AQI is under 100, humidity is below 65%, temperature is between 15-30°C, and it's not raining.

Is Open Window Today free?

All 32 home checks are completely free with no sign-in required. Just type your city and get instant results. Premium features like hourly breakdowns, email digests, and alerts are available for $7.99/month with the first month free.

How does the migraine weather card work?

The migraine risk card monitors barometric pressure changes. A drop of more than 6 hPa over 6 hours indicates medium risk, while drops exceeding 10 hPa indicate high risk. This is based on clinical research linking barometric pressure changes to migraine onset.

What air quality index is safe for opening windows?

An AQI below 100 is generally safe for opening windows. AQI below 50 is considered Good, 50-100 is Moderate. Open Window Today uses US EPA AQI calculated from PM2.5 concentration readings from the OpenWeatherMap Air Pollution API.

Can I dry clothes outside today?

Open Window Today checks humidity (needs to be below 65%), wind speed (under 30 km/h to prevent blowing away), and rain status. When all conditions pass, you get a Yes verdict with the specific humidity and wind readings.

Is it safe for asthma sufferers to go outside?

The asthma safety card checks AQI (above 100 is high risk), temperature (below 5°C is a documented cold-air trigger per BTS/Asthma Australia guidelines), and humidity levels. It gives a clear Yes, No, or Wait with the specific reason.

How accurate is the pollen forecast?

Pollen risk on Open Window Today is estimated from temperature, humidity and wind data — not from live pollen sensor readings. Warm, dry, breezy conditions indicate higher risk. For severe allergies, we recommend also checking your local pollen authority.

What countries does Open Window Today work in?

Open Window Today works in 120+ countries worldwide. It uses the OpenWeatherMap API which has global coverage. You can search any city, suburb, or neighbourhood and get suburb-level precision results.

How often is the weather data updated?

Weather data is fetched fresh on every search from the OpenWeatherMap API. The app auto-refreshes every 10 minutes if you have an active city. The 48-hour forecast updates with each search as well.

Can I use Open Window Today offline?

Yes, Open Window Today is a Progressive Web App (PWA) that can be installed on your phone and works offline with cached data from your last search. Install it from your browser's 'Add to Home Screen' option.

Open Window Today — 32 instant home cards for windows, laundry, health & more

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Unlimited saved cities — home, work, family anywhere

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Hourly breakdown per card — best time today to do laundry?

📧

Daily email digest — morning briefing at 7 AM for your city

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7-day history — see past conditions for any card

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Condition alerts — notify me when AQI drops or UV peaks

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Compare two cities — side-by-side card view

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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.

⚡

Results in under a second

Live weather fetched fresh on every search

🔒

No account. No tracking.

Location used only to fetch weather — never stored

🌍

Works in 120+ countries

Any city, any suburb, any language

📅

48-hour forecast included

See how all 32 cards change over the next two days

Type your city above and tap → — all 32 cards update live · Sign in for premium features

How it works

Step 01

📍

Type your city

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

Step 02

🔬

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).

Step 03

✅

Get 32 instant cards

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

Step 04

📲

Share with anyone

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

Trusted by people who just want answers

★★★★★

"The migraine card literally changed my life. I take my medication earlier on pressure-drop days now. Fewer migraines in 3 months than all of last year."

Rachel S.

@rachelchronicmigraine

★★★★★

"I check the laundry card every morning before I hang anything out. Saved me from soggy clothes so many times. Why didn't this exist before?"

Sarah T.

@sarahtidies · TikTok

★★★★★

"The plant card has genuinely saved three of my favourite plants this year. I used to guess — now I know. This is the only weather tool I use."

Marcus R.

@balconygrower · Instagram

★★★★★

"I painted my fence on a 'good' day from a regular weather app. It bubbled and peeled within a week. Since using the paint card on Open Window Today — two perfect results, no re-dos."

Dave T.

@davestoolshed · YouTube

★★★★★

"As someone with asthma, the asthma safety card has become part of my daily routine. On bad AQI days it reminds me to keep my inhaler close. It's genuinely protective."

Priya M.

@priya_homelife · Instagram

★★★★★

"I used to stare at weather apps for minutes trying to figure out if I should take my kids to the park. Now I open this, see green, and we go. Simple. Brilliant."

James K.

@dadofthree_au · Twitter

★★★★★

"The solar panel card is underrated. I schedule my washing machine and dishwasher around it now. My electricity bill has noticeably dropped. Didn't expect that from a weather site."

Lena W.

@lenasustainableliving

★★★★★

"My elderly mother lives alone and I share the 'safe for elderly' card with her every morning on WhatsApp. It's become a daily ritual. She loves it and so do I."

Aarav S.

@aaravs · Melbourne

Good questions. Real answers.

How is Open Window Today different from a weather app?

Weather apps tell you what's happening outside. Open Window Today tells you what to do about it. We run live data through 32 home-specific cards — each one has its own thresholds for Yes, No or Wait. You get decisions, not data dumps.

How do you decide whether to open my windows?

Five things must all pass: air quality (AQI under 100), humidity (80% or below), temperature (15–30°C), no rain, no snow. All five need to pass for a Yes. If any fail, you get a No with the specific reason why.

How does the migraine risk card work?

Barometric pressure drops are a clinically documented migraine trigger. We compare the current reading against the forecast and flag drops greater than 5–8 hPa — the threshold most commonly associated with migraine onset.

What does "air quality" mean?

We measure PM2.5 particles and translate them into the US EPA AQI scale (0–500). Under 50 is great. Above 100 means we recommend keeping windows closed. We show it as Good / Moderate / Poor so it's always clear.

Does it work anywhere in the world?

Yes — we use global OpenWeatherMap data. Type any city anywhere and get live results. Logic works globally with thresholds that make sense across climates.

Do I need to create an account?

No. All 32 cards are free with no sign-in required. Just type your city and get results instantly.

How do saved locations work?

Click the 📌 Save city button next to any result. Your locations are stored in your browser (localStorage) — no account needed, nothing sent to our servers. Save up to 5: home, work, family, holidays.

How often is the data refreshed?

Conditions are fetched fresh every time you search. The page also shows a 48-hour forecast strip so you can plan ahead — tap any time slot to see how all 32 cards change.

How does the pollen / hay fever card work?

We don't have access to live pollen sensor data — those networks are sparse and expensive. Instead, we derive a pollen risk estimate from weather conditions that strongly correlate with high pollen counts: temperature above 12°C, humidity below 75%, no rain, and light wind. This approach captures the majority of high-pollen days but is not a substitute for local pollen monitoring services — especially during severe allergy season. The card clearly labels readings as "Estimated" to reflect this. For medically accurate pollen counts, check your national meteorological or allergy authority.

Your home,smarter every day.

How it works

Trusted by people who just want answers

Good questions. Real answers.

Your home,
smarter every day.