Weather in Aspen in July

Prime time. If you get to pick your dates, July is the one. Highs average 26.9 °C, lows 11.2 °C, and rain falls on 13 days — nothing in the month is working against you.

July ranks 3 of 12 in Aspen. Only June scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 13 days, 0 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: 5 days top 30 °C — hot spells arrive, but they break; the day swings 15.8 °C from low to high, which means one bag has to cover both. Across the twenty years measured, the hottest July day reached 34.2 °C and the coldest night fell to 4.2 °C.

July is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest July on record still delivered 91 mm against 23 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 46 mm average is a reasonable planning figure, not a promise.

Wind is light at 1.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 56%.

How July sits in the year

This is a turning point in the year — June and August sit on opposite sides of it, so the month contains the change rather than following it. Rain has already shifted: 8 days more than June had.

Daylight in July

July is at or near the longest days of Aspen's year: 14.7 hours of daylight, losing 0.6 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

An inland climate

With no coast nearby, the year swings a fair way — 39.6 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage. At 2405 m, altitude is doing as much work here as latitude: thinner air means fierce sun by day and heat that leaves the moment it sets. Within July itself the daily swing is 15.8 °C, so mornings and afternoons need different clothes.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

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

July in Aspen versus nearby

If Aspen is one option among several, the nearby comparison is worth making. Denver is the weaker option in July — 6.5 °C warmer, 1 day more rain. Moab is the weaker option in July — 10.2 °C warmer, 5 days less rain.

So: July works, with June the better month by 13 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Aspen

See all twelve months in Aspen, or where else to go in July.