French Phrase
On aura environ 20 degrés.
Meaning
This sentence predicts the temperature for a future time, saying that it will be roughly twenty degrees (Celsius). It is a neutral, everyday way to talk about the weather forecast.
When to use
Use it when you discuss tomorrow’s weather, a weekend outing, or any future event where temperature matters. It works in casual conversation, radio forecasts, or travel planning.
✦Grammar Breakdown
Onauraenviron20degrés
Impersonal "on"
"On" is the French equivalent of the English "we/one/people" and is frequently used in spoken language to make general statements.
Future simple of "avoir"
"Avoir" in the future simple (aura) is used here not to mean "to have" but as an impersonal construction to talk about future weather.
"environ" (approximation)
"Environ" is an adverb meaning "about, roughly" and normally precedes the number it modifies.
Number + noun agreement
The noun "degrés" stays in the plural form when the number is greater than one; no article is needed in this weather expression.
🗨In Conversation
Quel temps fera-t-il demain ?
What will the weather be like tomorrow?
On aura environ 20 degrés.
It will be about 20 degrees.
✕Common Mistakes
Il aura environ 20 degrés.
While grammatically correct, native speakers rarely use "il aura" for weather; "il fera" or "on aura" sounds more natural.
20 degrés environ.
"Environ" normally comes before the number; placing it after sounds less idiomatic.
On aura environ 20 degré.
The noun must stay plural (degrés) when the number is greater than one.
↔Alternatives
Il fera environ 20 degrés.
It will be about 20 degrees.
La température sera d'environ 20 degrés.
The temperature will be about 20 degrees.
On peut s'attendre à environ 20 degrés.
We can expect about 20 degrees.
Cultural Tip
In French weather talk, "il fait" is used for the current temperature (Il fait 20 degrés) while "il fera" or the impersonal "on aura" is preferred for future forecasts. Native speakers often drop the word "Celsius" because it is understood in France. Using "on" makes the sentence sound informal and conversational, which is typical in everyday speech.