About this app
Thank you for choosing Wind Chill. You take the time to check conditions before heading out, and that is a smart habit. Check how cold it feels, review local weather and plan for cold days with a practical wind chill calculator.
CALCULATE THE COLD
Enter air temperature and wind speed to calculate wind chill before a walk, a commute or time outdoors. The manual calculator works offline and requires no account.
– Choose Fahrenheit or Celsius
– Enter wind speed in MPH, KPH or knots
– See results in both degrees Fahrenheit and Celsius
– Learn when the wind chill formula applies
– Return to your last inputs
– Review your five most recent results
CHECK WEATHER FOR YOUR LOCATION
Explore U.S. weather with NOAA and National Weather Service observations and forecasts. Fetch weather when you need it, then check the source and observation time.
– Use Current Location or a saved place
– Keep favorite weather locations ready to select
– Use saved coordinates without location permission
– Review available temperature, wind, humidity and visibility
– See whether observations are fresh, aging or stale
LOOK AHEAD WITH FORECASTS
Daily and hourly forecasts help you compare the air temperature with the cold you may feel when the wind picks up.
– Browse daily forecast periods
– Check hourly temperature, wind and precipitation
– View air temperature and calculated wind chill together
– Follow separate temperature and wind chill chart lines
– Switch hourly temperatures between Fahrenheit and Celsius
– See an "as low as" estimate when forecast wind varies
PLAN WITH SNOWDAY
Put winter conditions in one place for a useful planning check. The compact Weather section gets you to the inputs quickly, with detailed guidance in the top-right Help view.
– Fetch available weather and calculate in one step
– Enter or adjust all five conditions yourself
– Keep your manual values when fetching weather
– Use inputs truncated to one decimal place
– Review estimated snow and liquid for 24 hours
– Look ahead with a 48-hour projection
– Review school, federal facility and road impact scores
– Share a readable summary of your results
SnowDay offers planning estimates, not official closure predictions. Its 48-hour figures project the 24-hour estimate.
COMPARE NEARBY WEATHER STATIONS
A nearby report can add useful context to a cold day. Browse NOAA stations around your selected location and inspect the measurements they provide.
– Search by station name or identifier
– Compare distance and observation age
– Sort by wind chill or available data
– Open temperature, wind, pressure and visibility details
KEEP A RECORD
Save useful checks and revisit them when you want to compare conditions.
– Save manual calculations and weather-based records
– Search records by location, result or station
– Filter your saved entries
– Share a result or email a summary
– Import and export JSON records
– Export CSV files for a spreadsheet
ON IPHONE, IPAD AND APPLE WATCH
– Familiar tabs on iPhone and a sidebar on iPad
– Support for larger text and VoiceOver
– Light and dark appearances
– Cached Home Screen weather widgets with Pro
– An offline Apple Watch calculator
– Records saved locally on your watch, with individual sharing
START FREE, ADD PRO WHEN YOU WANT MORE
The manual calculator, recent results, Help and offline Watch tools are included. Try three free iPhone weather fetches on this device. Pro adds unlimited fetches, forecasts, Hourly, stations, saved places, records, SnowDay and widgets. Choose Monthly Pro or a Lifetime purchase, with Restore Purchases available.
Weather can be delayed or unavailable. Check official forecasts, warnings, school announcements and road information before making plans.
For monthly subscriptions:
Monthly Pro is a 1-month auto-renewable subscription.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
App Store Screenshots
Latest App Store Release Notes
Thank you for using Wind Chill to check the cold before heading out. You plan ahead, and that care makes a difference to your day. This update gives SnowDay a tidier layout, simpler controls and more consistent numbers, so you can spend less time working through the screen.
A MORE COMPACT SNOWDAY
The top Weather section takes up less room, bringing the conditions and calculation closer to hand.
– Choose Current Location or a saved place from the compact source row.
– See the weather status without working through a long introduction.
– Fetch available conditions and calculate from one button.
– Reach temperature, wind, visibility, precipitation chance and liquid inputs sooner.
– Keep useful weather notes and missing-data messages beside the fetch controls.
HELP WHERE YOU EXPECT IT
The longer instructions now live in SnowDay Help, available from the top right. Open it when you want the details, then return to your inputs.
– Learn what each condition contributes to the estimate.
– Understand liquid-water equivalent and snow-to-liquid ratios.
– See how the 24-hour figures relate to the 48-hour projection.
– Find answers about location access, manual entry and recalculating.
– Review the limits of school, federal facility and road impact scores.
ONE DECIMAL PLACE FOR INPUTS
SnowDay now keeps fetched weather and manual entries to one decimal place across all five condition fields. Extra decimal digits are removed without rounding up.
– 12.39 becomes 12.3.
– A negative temperature such as -12.39 becomes -12.3.
– Temperature, wind, visibility, precipitation chance and liquid follow the same rule.
– Calculations use the numbers shown in the fields.
– Typed and pasted values follow the same format.
– Help explains what happens when a small liquid amount becomes 0.0 inches.
A positive liquid amount below 0.1 inches becomes zero. SnowDay then uses its precipitation-chance fallback, so check the liquid field before calculating when small amounts matter.
SIMPLER ACTIONS, FAMILIAR TABS
SnowDay buttons now use clear text labels. The tab symbols remain, so your usual routes through the app stay easy to recognize.
– Fetch Weather & Calculate tells you what happens next.
– Calculate is easy to find below your condition fields.
– Share Results offers a readable summary of an estimate.
– Open Help at the top right whenever you need guidance.
– Text labels keep the focus on the action you want to take.
KEEP YOUR MANUAL CHANGES
You can still combine fetched weather with values you enter yourself. Refresh the available weather while keeping your manual choices.
– Keep a temperature or wind value you entered.
– Retain your visibility, precipitation chance or liquid amount.
– Read a note identifying manual values that were preserved.
– Fill missing conditions before running a calculation.
– Use the same selected weather source across SnowDay, Forecast and Hourly.
MORE TOOLS FOR COLD DAYS
Your other Wind Chill tools remain available, with Pro access required for advanced weather features.
– Calculate wind chill offline from air temperature and wind speed.
– Choose Fahrenheit or Celsius and familiar wind units.
– Review U.S. NOAA and National Weather Service data where available.
– Compare forecast air temperature with calculated hourly wind chill.
– Check nearby stations and observation times.
– Save places, revisit records and share useful details.
– Use the Apple Watch calculator offline.
SnowDay is a planning aid. Its impact scores are estimates, and the 48-hour outlook is a projection rather than a separate forecast. Check official school and workplace announcements, road information and current weather warnings before making plans.
App Store Information
- App Store category: Weather
- Genres: Weather, Travel
- Availability: Free
- Current version: 8.2
- Requires: iOS 17.6 or later
- Content rating: 4+
- Last updated: 2026-10-18
Developed by Verosocial. App details can change; verify the current App Store listing before publication.









