Climate and monthly weather forecast
San Juan Ostuncalco, Guatemala

San Juan Ostuncalco, located in Guatemala, carries the signature of an Aw Köppen climate classification. Known more commonly as the Tropical wet and dry or savanna climate, this area experiences considerable variations in weather parameters on a monthly basis. Year-round temperatures fluctuate from a low juncture of 2.1°C (35.8°F) to a high of 20.3°C (68.5°F). Notably, daylight hours oscillate minimally in the range of 13 hours to 11.3 hours throughout the year.

An assessment of rain distribution reveals divergences from merely 4mm (0.16") in January to a significant 265mm (10.43") in the month of September. Despite differences, there is a definitive pattern, particularly the onset of a dry spell from January to March followed by a surge in precipitation between April and October. The thermometric analysis showcases a distinct peak in April with a temperature high of 20.3°C (68.5°F). However, these high temperatures see a downward tug to 17.3°C (63.1°F) by December.

The optimum period to plan a visit would undoubtedly be between November and March. Considering the overall weather pattern, these months offer the double advantage of low precipitation levels coupled with a comfortable temperature range. November, with 22mm (0.87") rainfall, marks the beginning of the dry spell that extends till March. The temperatures during this period remain quite congenial, ranging from 17.3°C (63.1°F) to 19°C (66.2°F) providing a pleasant climate for visitors.

Travelers may want to avoid planning a trip during the rainy season, which generally spans from April to October. During these months, rainfall increases significantly, reaching its pinnacle of 265mm (10.43") in September. Simultaneously, the temperature remains on the higher side, with the temperature in April at 20.3°C (68.5°F) marking the beginning of this humid period.

Spring, between March to May, indicates an evident temperature escalation, starting from a minimum of 4°C (39.2°F) in March and reaching a maximum of 20.3°C (68.5°F) in April. However, rainfall follows an inverse pattern with a surge from merely 14mm (0.55") in March to a substantial 180mm (7.09") in May. The daylight hours increase during this period from 12.1 hours to 12.8 hours, marking longer days.

The summer months of June to August witness a solidification of the humid trend with temperatures hovering between 18.8°C (65.8°F) and 19.2°C (66.6°F). The rainfall persists in copious quantities between 184mm (7.24") in July to a substantial 194mm (7.64") in August, making it less than ideal for outdoor activities. Daylight hours reach their peak at 13 hours in June and start their descent to 12.6 hours by August.

Autumn, spanning from September to November, indicates a continuation of the rainy trend with a peak of 265mm (10.43") in September, gradually receding to a mere 22mm (0.87") by November. Correspondingly, there is a slight drop in temperature from 18.6°C (65.5°F) to 18°C (64.4°F) as autumn progresses.

Winter in San Juan Ostuncalco is characterized by its lowest temperatures and marked reduction in rainfall. A temperature drop to 17.3°C (63.1°F) in December and a low rainfall of 7mm (0.28") mark the advent of winter. Daylight hours in December hover around 11.3 hours. Despite the decline in temperature, this period is marked by a relative dry spell, making it appealing to visitors.

The start of the new year in San Juan Ostuncalco, Guatemala greets locals and visitors with more daylight hours. Temperatures remain considerably stable, marking the pattern for the next few months. Occasional rainfall, though moderate at just 4mm (0.16"), adds to the overall freshness of the atmosphere. Weather in January »

As February arrives, there's a marginal increase in monthly average temperatures, indicating a transition towards a warmer period. The daylight hours lengthen, aligning with the progress of the season. Although the rainfall amount increases slightly to 5mm (0.2"), it does not significantly alter the overall weather conditions. Weather in February »

March signifies the onset of a noticeable change in the weather pattern of San Juan Ostuncalco, Guatemala. Higher temperatures become prevalent while daylight hours prolong. However, the rainfall leaps to 14mm (0.55") from 5mm (0.2") in February, signaling a shift from the dry season. Weather in March »

In April, the dominant weather feature in San Juan Ostuncalco, Guatemala is the escalation in precipitation. The rainfall swells to a substantial 48mm (1.89") from just 14mm (0.55") in March, introducing the city into the rainy season fully. Weather in April »

A significant weather change occurs in San Juan Ostuncalco, Guatemala in May. Characterized by its peak in rainfall to a whopping 180mm (7.09"), the intensity of the rainy season reaches its climax in May. The increased temperature combined with high precipitation levels creates a thriving environment for flora and fauna. Weather in May »

With rainfall hitting a high of 243mm (9.57"), June earns the distinction of being the wettest month in San Juan Ostuncalco, Guatemala. The high precipitation level coincides with a peak in daily daylight hours, creating a unique combination. Weather in June »

Despite a moderate decrease in rainfall amounts from 243mm (9.57") to 184mm (7.24"), July continues to experience high rainfall in San Juan Ostuncalco, Guatemala. The temperature remains stable, and the daylight hours begin to decline. Weather in July »

August in San Juan Ostuncalco, Guatemala is characterized by a further decrease in rainfall to 194mm (7.64"). Despite the decrease, rainfall in August is still notable when pitted against earlier months. Daylight hours and temperatures remain relatively stable. Weather in August »

September signals a definitive drop in rainfall to 265mm (10.43"), signaling the end of the wet season in San Juan Ostuncalco, Guatemala. The decrease in rainfall is accompanied by a steady reduction in daylight hours. Temperatures, on the other hand, maintain a steady pattern throughout the month. Weather in September »

October ushers in drier weather conditions in San Juan Ostuncalco, Guatemala as the rainfall drops to 165mm (6.5"). A steady pattern of reducing daylight hours persists, hinting at the changing season. The weather remains relatively stable, even as temperatures start to drop slightly. Weather in October »

November marks the onset of cooler, drier weather with a significant drop in rainfall to just 22mm (0.87") in San Juan Ostuncalco, Guatemala. Daylight hours also decrease drastically, evidencing the onset of the dry season. November stands out with a notable decrease in rainfall and temperatures. Weather in November »

As the year concludes in San Juan Ostuncalco, Guatemala, December brings with it the lowest rainfall levels, dropping to a mere 7mm (0.28"). A slight decrease in daylight hours accompanies the falling temperatures, completing the transition towards the dry season. Weather in December »