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Two things define June here. The mistral comes down the Rhone valley and this city sits where it lands, but regulars are clear that it is mostly a winter and early spring wind - on a May or June trip you might meet it for a couple of days, and it is unpleasant rather than disabling, pushing hard sun and clear blue sky in behind it. Our wind column sits at 19.4 kph, which is that pattern flattened into an average. The other is lavender, in flower from about mid-June into mid-July, so the second half of the month is the half to book. The heat is real at 29.8C, with mid-thirties in a bad week, though 56.1 percent humidity keeps it reading as 29C, and nights fall right back to 15.9C. Rain is 45.7mm across 6.4 days. The record: 13.1 hours of sun and AQI 51.

Regulars are specific that this city catches the mistral coming down the Rhone valley even in deep summer, a strong wind that isn't exactly pleasant but comes with a real upside - clear blue skies and sunshine typically follow it rather than cloud or rain. Our row backs that hot, genuinely dry read, 32.8C reading as a hot 32C, over 18.8C nights, with rain minimal at 22.6mm across 4 days and humidity down to 48 percent. Regulars are consistent the wind can arrive at any point in summer without warning, strong enough to notice but not disruptive enough to change plans. This remains a genuinely great month for the Avignon Festival and evenings on outdoor terraces once the day's heat eases. The record: 13.4 hours of sun, a 20.3 kph wind and AQI 43.

Avignon-forum threads on January travel describe a real weather lottery this time of year, especially through the Rhone valley - posters say it can turn genuinely cold, but blue skies and sunshine are just as common a version of the month as grey and wet. One account recalls a surprise snowfall severe enough to shut down the nearby Nimes airport for a day, though regulars stress that's a rare outlier. Wind is the more reliable feature to plan around, the Mistral capable of making an already cold day feel considerably colder, worth factoring into how many layers to bring. The historic Palais des Papes and old town streets are perfectly walkable in January's cold, provided a visitor dresses for genuine winter. The record: 11.3C days feeling like 7C, 1.9C nights, 38mm across 7.1 days, 0.1cm of rare snowfall, 75 percent humidity and wind averaging over 20 km/h.

Mid-April in Avignon is usually a very pleasant month, with the standing caveats that a showery day happens and the mistral may blow. Avignon catches it coming down the Rhone valley, and regulars describe real physical force up on the Rocher des Doms and an evening that can feel five degrees colder than the thermometer says - our row's 6.9C night reading as 4C under a 20.8 kph average is the same effect, smaller. Their advice is not to reorganise the trip around it: it is a strong wind, unpleasant rather than disabling, a thin windbreaker handles it, and the compensation is the sky it leaves behind, scoured clear and blue. The record: 19.9C days, 57.2mm across 7.9 precipitation days, 10.4 hours of sun and AQI 42.

September is the month the Avignon forum recommends without qualification for inland Provence: very warm sunny days without midsummer's humidity, and cool nights that let you recover before the next one. Crowds melt in the first week as French schools go back - the difference between late August and mid-September is described as significant. Two local phenomena to know: a mini-Mistral can blow up from the north and make a day feel chilly, though it rarely lasts beyond 24 to 36 hours; and from mid-September the episodes mediterraneens begin, very localised torrential rain that occasionally floods rivers. A waterproof earns its place against wind and water both. The record: 27C days, 13.3C nights, 5.5 precipitation days carrying 82.1mm, 10.2 hours of sun.