Weather in Hermosillo in January

Prime time. If you get to pick your dates, January is the one. Highs average 24.6 °C, lows 9.6 °C, and rain falls on 3 days — nothing in the month is working against you.

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

Rain falls on only 3 days, so an itinerary with no wet-weather fallback is a reasonable risk. 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: the day swings 15 °C from low to high, which means one bag has to cover both. Across the twenty years measured, the hottest January day reached 34.6 °C and the coldest night fell to -1.6 °C, and the wettest single day dropped 33 mm — roughly 206% of the month's rain in one day.

This is the volatile part. January rainfall has ranged from 0 mm to 57 mm across the twenty years measured — a 57 mm spread around an average of 16 mm. The average is real but almost no individual January looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 7.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 43%.

How January sits in the year

Temperatures hold steady either side: 23.9 °C in December, 24.6 here, 25.8 in February. Nothing about the timing within the month matters much.

Daylight in January

January sits at the dark end of Hermosillo's year — 10.5 hours of daylight against 14 at midsummer, gaining 0.4 hours across the month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

An inland climate

With no coast nearby, the year swings a fair way — 30.1 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage. Within January itself the daily swing is 15 °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.

January in Hermosillo versus nearby

If Hermosillo is one option among several, the nearby comparison is worth making. Tucson is close enough to be a coin toss — 5.2 °C cooler, 1 day more rain. Chihuahua is close enough to be a coin toss — 5.3 °C cooler, 1 day less rain.

So: January is effectively as good as it gets here — 4 points behind December, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Hermosillo

See all twelve months in Hermosillo, or where else to go in January.