It started
with a rock.
MyWeatherRock.com. Built by PJM.
Then we gave it a forecast engine, a classroom, an arcade, and a wardrobe. A whole world of weather, with two googly eyes at the center of it.
Useful by nature.Weird by choice.
The face
is funny.
The weather
is serious.
Start with the question that brought you here: what’s the weather doing? Then go as deep as you want. This is a working weather tool with a personality, built to be useful every day.
Now. Next hour.
Next week.
Current conditions, feels-like temperature, hourly detail, and a 10-day outlook. Rain timing and amounts help turn a forecast into a plan.
Watch the
sky move.
Live radar, futurecast, satellite clouds, temperature and wind layers, alerts, and hurricane tracking. Look beyond a single number on a screen.
Your people.
Their weather.
Track other towns with a rock for each place. Check on home, a parent, or a college town. Optional browser notifications flag watches and warnings while the site is open.
For the
weather nerds.
Rock Lab opens the instrument panel: cloud cover, visibility, air quality, pressure, wind, and more. Local water readings bring in tides or inland conditions where available.
Yes, the rock
has a school.
Rocktucation makes the sky something you can understand. From a little one’s first rainy day to the physics of cloud formation, there’s a way in for curious humans of different ages.
First Weather
Big pictures, short explanations, read-aloud pages, simple activities, and games. An invitation to start noticing the sky.
Foundation
Plain-language lessons on rain chances, dew point, fronts, clouds, and more, with things to try and questions to test what sticks.
Working
Get into the mechanisms, measurements, and formulas. Interactive explainers, simulators, and experiments make the deeper science tangible.
Teachers.
Take it with you.
Free lesson PDFs, worksheets, answer keys, and printable coloring and tracing pages for younger learners. Built for classrooms and kitchen tables. No account required.
Get teaching resourcesA daily reason to look up
Snow looks white.
The crystals?
Clear.
That’s the spirit of a Rocktoid: a small fact that changes how you see something ordinary. A daily discovery on the forecast, with a whole archive for the “just one more” crowd.
Fall down the Rocktoid rabbit holeWeather words.
Human language.
Rocktionary and the Weather Terms library turn unfamiliar forecast language into something you can actually use.
Decode the forecastThe sky has a past.
Explore Weather History, then browse weather by town to put a place around your curiosity. There’s a snow-day calculator for the question every kid is already asking.
Explore weather historyTry the snow-day calculator
Keep asking why.
Why is the sky blue? Why does snow quiet the world? Why do forecasts disagree? The explainers follow the question past the obvious answer.
Read the explainersYou can lose
to a rock.
We thought checking the weather could come with a little play. Rockreation is a pocket-sized arcade where weather knowledge, quick guesses, and a very patient opponent share the screen.
- Tic Tac ToeClassic game. Unconventional opponent.
- Name That SkyPut a name to what’s happening overhead.
- Rock, Time, WeatherA weather-minded twist on a familiar showdown.
- Rocktoid or RubbishSeparate the weather facts from the nonsense.
- Warmer or ColderTwo towns. One temperature judgment.
Personality.
With receipts.
The Weather Journal gives the rock an editorial desk: weather reporting, plain-English explainers, field reports, and updates on what’s being built.
And when it comes to the forecast, you can read the report card.
Show the work.
- The prediction
- Written down
- The actual weather
- Checked against it
- The results
- Published openly
The Receipts looks at forecast performance, model comparisons, and whether confidence matches reality. The numbers stay on the site where you can see their dates and context.
See the forecast scorecardThe rock
has a
wardrobe.
Of course we made shirts. The Rock Shop takes the same dry humor and weather-obsessed personality off the screen: graphic tees, quote tees, all-over-print button-ups, and polos.
Merchandise is optional and sold separately. The forecast, school, facts, and games are free to use.
Made by us.
Out there
for everyone.
Free forecast. Free school. Free play.
MyWeatherRock is a PJM community project built around a simple idea: useful things can have a sense of humor. We build it, keep it running, and keep giving people more reasons to come back.
No account needed for the weather tools. Save it to your home screen and keep the rock close. Fresh forecasts still need a connection.