Key Summary- Guatemala’s climate is a story of altitude: steamy tropical lowlands give way to temperate highland (Cwb) zones where cities enjoy perpetual springlike weather.
- The Pacific slope and Petén lowlands fall under tropical savanna (Aw) and monsoon (Am) classifications, while the Caribbean coast stays wet and humid most of the year.
- A well-defined dry season from November to April creates the most comfortable window for exploring Mayan ruins, colonial streets, and coffee-country landscapes.
Guatemala sits squarely in the tropics, between 14°N and 18°N latitude, but its rugged spine of volcanoes and highlands completely reworks the climate you would expect at these latitudes. The Köppen climate map reveals three main zones. The northern Petén and the narrow Caribbean lowlands are primarily tropical monsoon (Am), with copious year-round rainfall and a brief, somewhat drier interlude around February and March. The Pacific coastal plain and interior valleys leaning toward the east are largely tropical savanna (Aw), defined by a sharp contrast between a very wet season and a baked, rainless winter. Running through the core of the country, the tierras templadas highlands settle into a subtropical highland climate (Cwb), where altitude trumps latitude and daytime highs moderate into a comfortably warm range while nights stay cool. Humidity in the lowlands remains stubbornly high, while the central highlands feel fresh and crisp, especially when the late-afternoon clouds roll in.
Seasonal rhythms pivot on rainfall rather than temperature. The dry season, roughly November through April, brings gloriously clear skies and dusty landscapes to the Pacific lowlands and highlands alike. In the Petén, this is the time when trails to the ancient temples of Tikal are firm and the forest canopy thins just enough for dazzling light to reach the stone. On the Caribbean coast around the Río Dulce and Livingston, however, it only gets modestly drier, and you should still expect frequent, heavy showers even in February. The wet season from May to October operates in two gears. Early rains in May and June often arrive as dramatic but short-lived afternoon downpours that turn the highlands intensely green, with temperatures ranging from a mild 18°C to 24°C (64°F to 75°F). September and October tend to bring the heaviest, most persistent rainfall, when Pacific storms can turn cobbled city streets into streams, make some rural roads unreliable, and keep the Petén lowlands oppressively muggy with highs around 30°C (86°F) and stifling humidity. On the plus side, this is when the coffee fincas are at their most lush and the highlands’ market towns feel utterly fresh-washed.
For most travel, the dry-season months from November to April are the clear sweet spot. The famously springlike highland cities such as Antigua and the shores of Lake Atitlán see daytime temperatures ideal for wandering, though evenings can dip cool enough for a light jacket. The Petén lowlands are more tolerable for climbing temples when the rains have paused. The wet season is less straightforward; May and June can still be very rewarding with vivid green scenery and fewer visitors, provided you bring a sturdy raincoat and plan mornings for outdoor activity. September and October are the months we suggest keeping maximum flexibility, as heavy tropical rainfall can slow down transport and turn jungle paths to thick mud. Packing smart means lightweight, breathable fabrics for the lowlands and a quality rain layer year-round if you plan to visit the Caribbean slope. In the highlands, a sweater or fleece earns its space in your bag every evening. Guatemala’s climate, mapped clearly by our Köppen charts, rewards travellers who match their itinerary to the seasonal pulse. Explore WeatherBox’s interactive maps and monthly data to pinpoint the best timing for the landscapes you want to experience.
