Weather in Sedona in September

A good month. September works. It is not the peak, but nothing about it fights you. Highs average 30.8 °C, lows 14.8 °C, and rain falls on 7 days — nothing in the month is working against you.

September ranks 6 of 12 in Sedona: past the worst of the year but short of April, which is the month to book if the dates are open.

Rain on 7 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 30.8 °C days and 14.8 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 18 days top 30 °C — hot spells arrive, but they break; the day swings 15.9 °C from low to high, which means one bag has to cover both. Across the twenty years measured, the hottest September day reached 40.8 °C and the coldest night fell to 2.9 °C, and the wettest single day dropped 31 mm — roughly 86% of the month's rain in one day.

September is moderately variable: 1 mm in the driest year against 87 mm in the wettest, around an average of 36 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 2.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 46%.

How September sits in the year

The month is on the way down: 2.7 °C cooler than August, with October dropping another 6.4 °C. The first week and the last are not the same trip. Rain has already shifted: 7 days fewer than August had.

Daylight in September

12.4 hours of daylight, losing 1.1 hours across the month. That is between Sedona's extremes of 14.5 and 9.8 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 35.2 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage. At 1326 m the air is thin enough to matter — sun that burns faster than the temperature suggests, and nights that cool off quickly. Within September itself the daily swing is 15.9 °C, so mornings and afternoons need different clothes.

How busy it gets

Shoulder. The value months — prices ease off and you get the place closer to itself.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

September in Sedona versus nearby

If Sedona is one option among several, the nearby comparison is worth making. Phoenix is the weaker option in September — 7.8 °C warmer, 3 days less rain. Tucson is the weaker option in September — 4.2 °C warmer, 1 day more rain.

So: September is a compromise. April is 25 points better and is what Sedona is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Sedona

See all twelve months in Sedona, or where else to go in September.