Weather in Santiago de Querétaro in September

A good month. September works. It is not the peak, but nothing about it fights you. You should expect rain on 19 days of the month, which is more days wet than dry.

September ranks 10 of 12 — near the bottom of Santiago de Querétaro's year. December is the month that works, and the swing between the two is 42 points, which is a different holiday rather than a slightly better one. Worth keeping in perspective: September is the weakest month of Santiago de Querétaro's year and it is still a perfectly good one. The downside here is small.

Rain on 19 days, 4 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

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest September day reached 31.4 °C and the coldest night fell to 4.2 °C, and the wettest single day dropped 30 mm — roughly 24% of the month's rain in one day.

September is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest September on record still delivered 254 mm against 57 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 124 mm average is a reasonable planning figure, not a promise.

Wind is light at 7.4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 76%, high enough to notice on the warm days without dominating them.

How September sits in the year

Temperatures hold steady either side: 27 °C in August, 26.2 here, 25.8 in October. Nothing about the timing within the month matters much. Rain is the thing that moves: October brings 10 days less of it, so pushing the dates later buys drier weather.

Daylight in September

12.3 hours of daylight, losing 0.6 hours across the month. That is between Santiago de Querétaro's extremes of 13.4 and 10.9 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 24.3 °C between the year's warmest afternoons and coldest nights. At 1826 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.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

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

September in Santiago de Querétaro versus nearby

If Santiago de Querétaro is one option among several, the nearby comparison is worth making. Morelia is close enough to be a coin toss — 2.3 °C cooler, 6 days more rain. Mexico City is close enough to be a coin toss — 3.5 °C cooler, 7 days more rain.

So: September is a compromise. December is 33 points better and is what Santiago de Querétaro 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 Santiago de Querétaro

See all twelve months in Santiago de Querétaro, or where else to go in September.