Roisan
No weather alerts today for Roisan · Source: Italian Civil Protection Department
Today, the most reliable forecast for Roisan is
iLMeteo.it
At the province level
Rain nearby, right now
The nearest rain core is less than 1 km north of the centre of Roisan, with light intensity.
Observed data from the latest radar sweep (08:10) · Radar-DPC, Italian Civil Protection
Yesterday in Aosta
Observed data for 23 AugustThe reference provincial capital for Roisan is Aosta
Why trust this recommendation?
Every day we compare the forecasts of 5 weather services against the actual weather in Roisan. iLMeteo.it gets it wrong less often than the others: over the latest period it got 6 out of 10 forecasts right.
Weather service ranking
Most accurate yesterday
iLMeteo.it nailed it.
Most reliable this week
iLMeteo.it was the most accurate.
Yesterday's report card
23 AugustForecasts made the day before for Aosta, compared with what actually happened
- 3BMeteoHighoffLowoffRaincorrect
- Meteo Aeronautica MilitareHighoffLowoffRaincorrect
- iLMeteo.itHighspot onLowoffRaincorrect
- Meteo.itHighoffLowoffRaincorrect
- Apple WeatherHighoffLowoffRainwrong
Spot on = within 2 degrees · Close = within 4 degrees
Ongoing streaks
- iLMeteo.it has called the rain right for 4 days in a row
The weather in Roisan
There was no shortage of rain in Roisan. At the top of the table we find iLMeteo.it, the most reliable for this area. A pleasant breeze accompanied the days. Looking at nearby towns such as Saint-Christophe and Aosta, iLMeteo.it's lead is confirmed.
Updated on 25 August 2026
Sun and moon today
3 fewer minutes of daylight than yesterday
Waxing gibbous, 93% illuminated
Map of Roisan
Loading map…
Nearby towns
How was this calculated?
The score is calculated by interpolating data from 8 nearby provinces, weighted by geographic distance.
Provinces considered:
Localities in Roisan
Get to know Roisan
How predictable is the weather around here? Over the last two months, forecasts for the Aosta area were right 50% of the time on average. It is among the hardest areas to forecast in Italy: 106th out of 107.
How much to trust forecasts, depending on how far ahead they are:
- For tomorrow50% · fairly reliable
- 2 days ahead50% · fairly reliable
- 5 days ahead49% · take with a grain of salt
How does it work? Every day we collect weather forecasts and compare them against real data to determine which service is most reliable for Roisan.