Weather in El Paso in September

A good month. September works. It is not the peak, but nothing about it fights you. Highs average 31.8 °C, lows 18.1 °C, and rain falls on 7 days — nothing in the month is working against you.

September ranks 9 of 12 in El Paso: past the worst of the year but short of March, 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 31.8 °C days and 18.1 °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: 5 days clear 35 °C, so a serious heatwave is normal rather than notable. Across the twenty years measured, the hottest September day reached 39.2 °C and the coldest night fell to 9.3 °C, and the wettest single day dropped 33 mm — roughly 80% of the month's rain in one day.

September is moderately variable: 12 mm in the driest year against 108 mm in the wettest, around an average of 41 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 8.9 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: 3 °C cooler than August, with October dropping another 4.9 °C. The first week and the last are not the same trip.

Daylight in September

12.4 hours of daylight, losing 1 hours across the month. That is between El Paso's extremes of 14.2 and 10.1 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 36.1 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage. At 1133 m the air is thin enough to matter — sun that burns faster than the temperature suggests, and nights that cool off quickly.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

September in El Paso versus nearby

If El Paso is one option among several, the nearby comparison is worth making. Chihuahua is close enough to be a coin toss — 2.5 °C cooler, 4 days more rain. Albuquerque is a better bet in September — 2 °C cooler, the same number of rain days.

So: September is a compromise. March is 31 points better and is what El Paso 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 El Paso

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