Climate and monthly weather forecast
Iztapa, Guatemala

Iztapa, nestled in the rain shadow of the volcanic peaks of Guatemala, is classified as having a Tropical wet and dry climate as per the Köppen climate classification. The ampleness of sunlight, insistent heat, and wild fluctuations in rainfall largely define the region’s climatic narrative. Monthly high temperatures in Iztapa remain relatively constant, wavering between 31.4°C (88.5°F) to 33.2°C (91.8°F). Meanwhile, the lower threshold of temperature bears a mild increase from 20.3°C (68.5°F) January to 24°C (75.2°F) by May, subsequently dropping back to 21.1°C (70°F) in December.

The daylight duration undergoes modest growth and shrinkage across the year, starting at 11.3 hours in December, gradually extending to reach a peak of 12.9 hours between June and July, and thereafter receding to 11.4 hours in November. In stark contrast to the gentle undulations of daylight and temperature, the rainfall pattern in Iztapa presents a roller coaster ride. It starts from a bone-dry zero millimetre in January, slowly accresces to reach a heart-stopping pinnacle of 320mm (12.6") in September, before eventually reducing back to a scanty 3mm (0.12") by December.

Lending further uniqueness to the climate are the monthlong drought in January and February, and the torrential September rains when the intensity of rainfall more than doubles from its prior month's volume.

Visitors interested in exploring the vibrant landscapes of Iztapa might want to schedule their trip between November and February. This time frame offers the combined advantage of prolonged daylight hours — 11.4 hours in November increasing to 11.7 hours in February, temperate weather — highs drifting between 31.4°C (88.5°F) to 32.5°C (90.5°F), and less rain — a negligible 3mm (0.12") in December to zero in January and February, making outdoor excursions comfortable and enjoyable.

Planning a trip to Iztapa between June and September might not be a fantastic idea due to the high likelihood of torrential downpours. July and August receive close to 250mm (9.84") of rainfall, and September tops it with an astronomical 320mm (12.6"). Despite having the highest daylight hours - 12.9 hours, the intrusive showers and highs fluctuating between 31.4°C (88.5°F) to 32.1°C (89.8°F) could, unfortunately, dampen the holiday spirit.

March to May in Iztapa is characterized by an escalating warming trend. It transitions from the cool of 20.7°C (69.3°F) nights in March to the heat of 24°C (75.2°F) nights by May. Daytimes hover between 32.5°C (90.5°F) to 32.7°C (90.9°F). The period also marks the onset of the rainy season, with precipitation volumes jumping from a meagre 6mm (0.24") in March to a torrential 136mm (5.35") by May.

Summers in Iztapa, spanning from June to August, are hot, steamy and drenched. Day temperatures fluctuate in the narrow band between 31.9°C (89.4°F) and 32.1°C (89.8°F), while nights remain warm at between 23.5°C (74.3°F) and 23.9°C (75°F). Rainfall in these months is significant, escalating from 241mm (9.49") in June to a staggering 320mm (12.6") by September.

Autumn in Iztapa, from September to November, observes a cooling trend. Temperatures range from a high of 31.4°C (88.5°F) to a low of 22.2°C (72°F). While September remains extremely humid with 320mm (12.6") of rainfall, precipitation abruptly nosedives to 31mm (1.22") in November, signalling the end of the monsoon.

Winter in Iztapa, from December to February, boasts temperate weather conditions. Nights cool down to an average of between 20.3°C (68.5°F) and 21.1°C (70°F) while days remain warm, with highs ranging from 32°C (89.6°F) to 32.1°C (89.8°F). A nearly rain-free season with scanty precipitation of 3mm (0.12") in December to none in January and February makes it perfect for outdoor activities.

The city of Iztapa inaugurates the year with warm and inviting weather. Residents and tourists can look forward to long sunny intervals, punctuated by refreshingly cool nights. The month experiences a high average temperature of 32.1°C (89.8°F) and low temperatures around 20.3°C (68.5°F). Weather in January »

The progression of Iztapa’s weather into February remains relatively consistent with that of January. Length of daylight slightly increases which results in a yet slightly warmer environment. Dominated by a dry pattern, inhabitants continue enjoying uninterrupted outdoor activities. Weather in February »

Into the transitionary month of March, Iztapa starts experiencing rainfalls, a departure from the preceding dry climatic conditions. The weather dynamics from February to March change quite perceptibly, with slight increments in the temperature pattern. Weather in March »

In April, Iztapa witnesses a noticeable jump in rainfall, up to 38mm (1.5") from scarcely 6mm (0.24") the preceding month. This notable increment signifies an ushering in of the wet period in Iztapa’s calendar. The trend magnifies the importance of rain-specific gear for locals and visitors alike in future days. Weather in April »

The weather in Iztapa comes to its full stride in May, characterized by a heavy rainfall of 136mm (5.35"). This comes with a considerable escalation in temperature, making it the warmest month of the year. The increased rainfall marks the peak of the wet season daring all to adapt. Weather in May »

June's weather intensifies further, rendering it the wettest month, with Iztapa receiving a rainfall of up to 288mm (11.34"). This strong rain climate dominates the overall monthly weather profile. Despite the significant rainfall, the overall temperature remains fairly constant. Weather in June »

The trend in July’s weather in Iztapa indicates a welcome downwards shift in rainfall. This revisits more friendly outdoor conditions, compared to the heavily rained upon June. The city experiences a slight reduction in temperature, without affecting the overall comfort that the warmth offers. Weather in July »

Iztapa's weather pattern during August presents a consistent precipitation routine with July. This rainfall level, even though significant, is appreciably lower than the peak witnessed in June. The decrease in rainfall further progresses, marking a move towards a relatively drier season. Weather in August »

September’s weather in Iztapa undergoes a slight escalation, making it the second rainiest month of the year with rainfall of 320mm (12.6"). Persistent warm temperatures accompany the notable increase in precipitation levels. Weather in September »

October's weather in Iztapa brings a remarkable decrease in rainfall, reducing to 244mm (9.61") from the intense 320mm (12.6") of September. However, it is still heavy enough to warrant keeping a raincoat at hand. The reduction in rainfall signals the gradual end of the wet season. Weather in October »

On entering November, Iztapa's weather springs a significant drop in precipitation levels. Now experiencing only 31mm (1.22") of rainfall, the city fast transitions out of the wet season. The marked decline highlights November’s arrival as the onset of dry weather. Weather in November »

December's weather in Iztapa marks a return to consistently dry conditions, with minimal rainfall of only 3mm (0.12"). The shift from the preceding wet months of the year is notably striking. The city thus dawns its holiday-ready fascia, with warm days and cool, comfortable nights. Weather in December »