Zion, USA

Zion sits in dry, desert-edge country in USA, and the 2015–2024 weather record gives its sunshine a clear shape: the June peak reaches a 100/100 sun score, with daytime highs around 28°C — a solid base for a trip built around landscapes and trails.

July is the heat peak, averaging 30°C highs; January is the cool end, when nights dip to around -7°C. Rain is most likely in March, when about 29% of days see meaningful rainfall, and least likely in June (3%). If 24°C is your bar for proper warmth, count on June–September.

The seasonal arc is clear in the data: summer averages 29°C against winter's 4°C, while rain-day odds move from 21% in winter and 20% in spring to 11% in summer and 12% through autumn. That makes summer the statistical sweet spot (season score 99), with autumn a workable second; winter is where the odds thin out. A practical compromise is September — the edge of the warm window, averaging 24°C with a 97 sun score.

Best months to visit Zion

Ranked purely on sunshine odds, the podium is June at 100/100, then July at 99 and August at 98. The dependable window is wider than the podium, though: April–October all score 70 or better. The month to avoid on pure weather odds is January (57/100).

Put against its 44 desert peers in June, it lands in the sunnier half of the group, ahead of 93% of them.

Month-by-month breakdown for Zion → · More destinations for June →

The live forecast backs this up: of the next 16 days, 5 look mostly clear and 2 carry meaningful rain risk, in a 1–16°C band. Today's cached sun score is 63/100.