Weather in Guadalajara

Guadalajara is in Mexico at 20.7°N. The 2001–2020 NASA POWER daily record describes a monsoon climate with a sharp wet-dry split. May is the warmest month (average 24.8°C, high 32.8°C) and January is the coolest (average 16.6°C, low 9.1°C).

Rain is the monsoon runs from June to September, inside an annual total of 804 mm. The wettest month is July at 205 mm; the driest is April at 1 mm. On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are March, April, and December.

When the score favours a visit

The three months with the highest comfort score are March, April, and December: March (20.7°C average, 8 mm, 38% humidity); April (23.4°C average, 1 mm, 33% humidity); December (16.9°C average, 7 mm, 57% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the monsoon itself — fewer crowds, greener landscape, heavier rain — aim at June–September instead of the score.

Temperature through the year

Monthly average highs run from 24.0°C in January to 32.8°C in May. Nights follow the same curve: 9.1°C in January and 16.8°C in May.

Across the year the mean afternoon high is 27.1°C. If you want the smallest day–night shock, look at months where the high and low sit close together; May nights still hold 16.8°C.

Monsoon and dry months

The monsoon in Guadalajara starts in June and ends in September (June, July, August, and September). July is the core of it at 205 mm. April is the other extreme, with 1 mm.

Humidity peaks near 79%. That usually lines up with the wetter months rather than the hottest ones.

Distinctive months in Guadalajara

The year bottoms out in January. Plan for 9.1°C at night and 24.0°C in the afternoon. April is the driest month, averaging only 1 mm across 0 rainy days. Highs sit near 31.9°C. Peak heat arrives in May: 32.8°C by day, 16.8°C at night, and 39% humidity.

June is when the monsoon typically starts in Guadalajara: highs near 29.6°C, and rainfall jumps to 149 mm (21 rainy days). July is the wettest month — 205 mm and 28 rainy days, with 75% humidity. October brings 52 mm and 11 rainy days; temperatures run from 13.7°C to 25.8°C.

Guadalajara and other cities in Mexico

León is about 180 km away: Guadalajara is 2.3°C warmer than León in its hottest month and 120 mm wetter over the year than León. León’s wettest month is July (174 mm) versus July here.

Querétaro is about 308 km away: Guadalajara is 2.7°C warmer than Querétaro in its hottest month and 122 mm wetter over the year than Querétaro. Querétaro’s wettest month is July (158 mm) versus July here.

Mexico City is about 462 km away: Guadalajara is 6.9°C warmer than Mexico City in its hottest month and a similar annual rainfall (793 mm in Mexico City). Mexico City’s wettest month is July (154 mm) versus July here.