Climate and monthly weather forecast
Guanajuato, Mexico

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The climate of Guanajuato

Guanajuato, Mexico is situated within the Mid-latitude steppe, as classified by the Köppen climate system, featuring a prevalent BSk climate type. Chronologically, the climate exhibits a moderately dry stretch from January to April, followed by a wetter spell navigable from May through to October, and culminating in a somewhat dry period over November and December.

Different weather elements show fluctuations throughout the year. Monthly average temperatures oscillate from 7°C (44.6°F) to 14.4°C (57.9°F) for lows and from 19.8°C (67.6°F) to 28.2°C (82.8°F) for highs. The highest temperatures occur in May while January and December present the coldest conditions. A shift in humidity can be seen from 36% in April to 76% in September. Notably, rainfall varies from a low 3mm (0.12") in January to a high 87mm (3.43") in July, displaying seasonal shifts in precipitation.

There's a discernible rise in daylight hours from 11 hours in January to 13.4 hours in June, with a gradual decrease subsequently. Interestingly, UV index reaches its peak of 6 during the hotter months from April to May, dipping to a minimal 4 during the colder months. It's noteworthy to mention that Guanajuato experiences high visibility of around 10km (6.2mi), except from September to November when visibility decreases slightly to 8km (5mi) to 9km (5.6mi).

The best time to visit Guanajuato

Travelers seeking to experience Guanajuato in pleasing weather conditions are advised to schedule their visit during April and May. During these months, the city basks in sophisticated warmth paired with a generous sunshine duration of 9.7 hours. The UV index is high, presenting excellent conditions for sightseeing and exploration. It is worth noting that this period also witnesses reduced rainfall, thus keeping the thoroughfares accessible and navigable.

The worst time to visit Guanajuato

The residents of Guanajuato experience their wettest period from June through September, characterized by an average rainfall of 73mm (2.87"). This escalation in precipitation, paired with increased humidity of over 70%, makes these months less appealing to travelers. Those not partial to wet conditions should abstain from visiting during this time. Wind speed also intensifies with gusts reaching 15.5km/h (9.6mph).

Spring weather in Guanajuato

Spring's arrival decorates Guanajuato, Mexico, with favorable weather for outdoors enjoyment. March witnesses temperatures ranging from 9.6°C (49.3°F) to 24.8°C (76.6°F), culminating in a high of 14.3°C (57.7°F) to 28.2°C (82.8°F) by May. While the humidity starts decreasing from 44% in March to a minimum of 36% in April, rainfall remains subdued, making spring an attractive season for outdoor activities.

Summer weather in Guanajuato

Summer commences with a steep rise in humidity to 61% in June and persists above 70% till September. Concurrently, temperatures experience stability, ranging from 13.3°C (55.9°F) to 26.1°C (79°F) marking the commencement of the rainy season as rainfall pushes up to 81mm (3.19") in June and peaks at 87mm (3.43") in July. As the summer progresses, the daylight hours slightly retreat from 13.4 hours in June to 12.8 hours by August.

Autumn weather in Guanajuato

The Autumn season in Guanajuato observes a downward transition of several weather parameters. Average temperatures that soared from 13.3°C (55.9°F) to 24.1°C (75.4°F) in September slip to 10.6°C (51.1°F) to 22.5°C (72.5°F) by November with reduced daylight hours at 11.7 hours. Rainfall also tricks down from a substantial 62mm (2.44") in September to an insignificant 14mm (0.55") in November. And as autumn advances, the humidity drops from 76% to 65%.

Winter weather in Guanajuato

Winter features a relatively dry and cooler period in Guanajuato. Temperature ranges from 8.9°C (48°F) to 21.1°C (70°F) in December which further decreases to 7°C (44.6°F) to 19.8°C (67.6°F) in January. A consistent decline in daylight underscores the progress of winter, bottoming out at 10.9 hours in December. Rainfall plunges to its lowest of 4mm (0.16") in December, indicating winter's dry nature. Humidity also reduces sequentially, reaching a low of 53% in January before inching upwards again.

Weather in January

Guanajuato, Mexico experiences mild climate distinctions round the year with January standing at the helm of winter. Noticeably, the month’s humidity at 53% makes it the driest period of the year. Temperatures range between 7°C (44.6°F) in the chilly mornings to high of 19.8°C (67.6°F) during the day. Weather in January »

Weather in February

Shifts in climate become evident as February ushers in slightly warmer temperatures. February in Guanajuato sees the average rainfall scale from 3mm (0.12") in January to 12mm (0.47"), heralding the onset of the rainy season that lasts till September. Weather in February »

Weather in March

As spring steps in March, weather patterns take a more pronounced turn. The average high temperature increases to 24.8°C (76.6°F). Consequently, this increasing warmth is balanced by a total 15mm (0.59") of rainfall. Concurrently, the days continue to stretch, indulging visitors to experience more of antique Guanajuato mysteries. Weather in March »

Weather in April

Guanajuato in April personifies the grandeur of the Mexican Spring. This month witnesses the lowest average relative humidity of 36%, ideally complimenting the sunny days. The wind rattles at a relatively higher speed of 10.8km/h (6.7mph), adding an invigorating touch to the warm month. Weather in April »

Weather in May

The city of Guanajuato starts to experience a significant shift in weather as May approaches. The month's maximum average temperature hits an annual high of 28.2°C (82.8°F). Consequently, the rainfall in May also sees a stark increase up to 30mm (1.18"), signifying the beginning of the rainy season. Weather in May »

Weather in June

Guanajuato embraces the summer solstice in June as the year progresses. June is characterized by persistent showers with the highest rainfall recorded at 81mm (3.19"). Regular rainfall coupled with increased humidity creates an atmospheric glow across the city's classic skyline, enhancing its beauty manifold. Weather in June »

Weather in July

July in Guanajuato is immersed in an vibrant rainy mood backed by high humidity. The showers rise slightly from June to reach the year's peak at 87mm (3.43"). Though dampness often prevails, the city's scratchy outline exhibits an ethereal charm during this month. Weather in July »

Weather in August

As summer makes way for fall, August brings with it a slight reprieve from the heavy rains. With the maximum average temperature at 24.4°C (75.9°F), the month experiences a total rainfall of 69mm (2.72"). The city gears up for the festive season with pleasant weather and considerable daylight hours. Weather in August »

Weather in September

September rings in lower temperatures and a gradual decline in rainfall in Guanajuato, indicating the end of the wet season. Local and travelers alike are greeted with a 23.2°C (73.8°F) daily average high and 62mm (2.44") cumulative rainfall. Weather in September »

Weather in October

With fall in full swing, October introduces the city to a refreshing spirit with lesser showers. From 62mm (2.44") rainfall in September, the total precipitation sees a significant drop to 38mm (1.5") in October. The diminished showers are complemented by a pleasant 22.5°C (72.5°F) maximum average temperature. Weather in October »

Weather in November

November ushers in a transition from fall to winter, making it ideal for tourists seeking a milder climate. With a drop in maximum temperature to 21.1°C (70°F), the city observes a total precipitation of 14mm (0.55"). This substantial reduction in rainfall is relayed by increasingly refreshing and crisp weather. Weather in November »

Weather in December

Closing the annual weather cycle, December in Guanajuato, observes winter in its full form. It exhibits the city's second-lowest monthly average temperature, 20.3°C (68.5°F), accompanied by a significantly dry period of 4mm (0.16") total rainfall. Weather in December »
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Frequently asked questions

What month is the coldest in Guanajuato?

The month of January, characterized by an average high of 19.8°C (67.6°F) and a low of 7°C (44.6°F), is recognized as the coldest in Guanajuato.

What is the driest month in Guanajuato?

The month with the least rainfall in Guanajuato, Mexico, is January, when the rain falls for 3.2 days and typically collects 3mm (0.12") of precipitation.

How many days does it rain in Guanajuato?

Throughout the year, there are 116.2 rainfall days, and 425mm (16.73") of precipitation is accumulated.

What are the months with the most sunshine in Guanajuato?

January, May and December, with an average of 9.8h of sunshine, are months with the most sunshine.

What are the months with the lowest UV index in Guanajuato?

The months with the lowest UV index in Guanajuato are January, November and December, with an average maximum UV index of 4.

What is the least humid month in Guanajuato?

April is the least humid month, with an average relative humidity of 36%.

When is the highest UV index in Guanajuato?

April and May, with an average maximum UV index of 6, are months with the highest UV index in Guanajuato.

What part of the year is the hottest in Guanajuato?

Guanajuato, Mexico, experiences its average highest temperatures in May, reaching a peak of 28.2°C (82.8°F) and a minimum of 14.3°C (57.7°F).

When are the longest days in Guanajuato?

June has the longest days of the year, with an average of 13h and 24min of daylight.

What is the rainiest month in Guanajuato?

The month with the most rainfall is July, when the rain falls for 19.8 days and typically aggregates up to 87mm (3.43") of precipitation.

What is the month with the least sunshine in Guanajuato?

With an average of 9.2h of sunshine, July has the least sunshine of the year in Guanajuato, Mexico.

What is the most humid month in Guanajuato?

September is the most humid month, with an average relative humidity of 76%.

What is the month with the shortest days in Guanajuato?

The month with the shortest days in Guanajuato, Mexico, is December, with an average of 10h and 54min of daylight.

Is there Daylight Saving Time (DST) in Guanajuato?

Guanajuato, Mexico, does not utilize Daylight Saving Time (DST). CST timezone is used over the entire year.

Average temperature
Guanajuato, Mexico

Average temperature - Guanajuato, Mexico

The warmest month (with the highest average high temperature) is May (28.2°C).
The month with the lowest average high temperature is January (19.8°C).

The month with the highest average low temperature is June (14.4°C).
The coldest month (with the lowest average low temperature) is January (7°C).

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Average pressure
Guanajuato, Mexico

Average pressure - Guanajuato, Mexico

The month with the highest atmospheric pressure is January (1018.5mbar).
The month with the lowest atmospheric pressure is May (1013.6mbar).

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Average wind speed
Guanajuato, Mexico

Average wind speed - Guanajuato, Mexico

The windiest month (with the highest average wind speed) is April (10.8km/h).
The calmest month (with the lowest average wind speed) is December (9.1km/h).

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Average humidity
Guanajuato, Mexico

Average humidity - Guanajuato, Mexico

The month with the highest relative humidity is September (76%).
The month with the lowest relative humidity is April (36%).

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Average rainfall
Guanajuato, Mexico

Average rainfall - Guanajuato, Mexico

The wettest month (with the highest rainfall) is July (87mm).
The driest month (with the least rainfall) is January (3mm).

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Average rainfall days
Guanajuato, Mexico

Average rainfall days - Guanajuato, Mexico

The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is December (1.8 days).

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Average daylight / Average sunshine
Guanajuato, Mexico

Average daylight / Average sunshine - Guanajuato, Mexico

The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).

The months with the most sunshine are January, May and December (Average sunshine: 9h and 48min).
The month with the least sunshine is July (Average sunshine: 9h and 12min).

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Average sunshine days
Guanajuato, Mexico

Average sunshine days - Guanajuato, Mexico

The month with the most sunshine days is December (28.5 days).
The month with the least sunshine days is July (9.1 days).

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Average UV index
Guanajuato, Mexico

Average UV index - Guanajuato, Mexico

The months with the highest UV index are April and May (UV index 6).
The months with the lowest UV index are January, November and December (UV index 4).

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Average visibility
Guanajuato, Mexico

Average visibility - Guanajuato, Mexico

The months with the highest visibility are January, February, March, April, May, June, November and December (10km).
The month with the lowest visibility is September (8km).

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Guanajuato, Mexico

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