Climate and monthly weather forecast
Retalhuleu, Guatemala

Retalhuleu, a city located in Guatemala, exhibits a climate that is primarily classified as Aw by the Köppen climate classification. This reveals that the predominate climate is Tropical wet and dry or savanna. This translates to two significant seasons within the city every year: a dry season and a wet season. The temperatures fluctuate between 24°C (75.2°F) to 32°C (89.6°F) throughout the year showing limited variation in temperature.

The influence of the tropical savanna climate manifests itself in the rainfall patterns, with some months witnessing considerably more rainfall than others. The maximum rainfall measures at an impressive 460mm (18.11"), typically observed in the month of September. Notably, the months of May to October show significant rainfall, with each month recording over 200mm (7.87") on average. In contrast, the dry months, which include February, December and January, receive less than 50mm (1.97") of rainfall, creating a stark contrast between the seasons.

Hence, Retalhuleu experiences a substantial shift in weather conditions between the rainy and the dry seasons. Additionally, the city also experiences generous amounts of sunlight throughout the year, with daylight hours varying from 11.3 to 13 over the yearly cycle.

Based on the weather conditions, the best time to visit Retalhuleu would be during the months from December to February. During these months, the city reports the least amount of rainfall, making it the ideal time for outdoor activities and sightseeing without interruptions from rainfall. Furthermore, the temperatures remain consistently warm, averaging between 24°C (75.2°F) to 31°C (87.8°F), providing pleasant conditions for visitors.

On the other hand, the worst time to visit Retalhuleu would arguably be during the months with the highest rainfall. This includes the period from May to October with rainfall ranging from 200mm (7.87") to 460mm (18.11"), increasing the chances of flood-like conditions and disrupting travel plans. Additionally, the temperatures are slightly higher during these months, adding humidity to the mix.

Although the concept of spring is not traditionally recognized in tropical climates, the months of March and April can be considered as the spring months for the purpose of climate analysis. During these months, Retalhuleu experiences temperatures ranging from 26°C (78.8°F) to 32°C (89.6°F). Rainfall begins to increase during this period but remains manageable, ranging from 50mm (1.97") to 80mm (3.15").

Again, as with tropical climates, the concept of summer is not universally applicable, but for comparison purposes, the months from May to August can be labeled as summer months. Here, temperatures continue to hover around the 30°C (86°F) mark. However, rainfall magnifies considerably, especially towards July and August, when rainfall averages 360mm (14.17") to 380mm (14.96").

Retalhuleu's "autumn" months, September and October, present the most challenging weather conditions. Rainfall hits its peak with 460mm (18.11") recorded in September and a significant 360mm (14.17") in October. The temperatures continue to stay within the range of 24°C (75.2°F) to 29°C (84.2°F).

The winter months, interpreted as November, December, and January, bring relief from the heavy rainfall of the preceding months. With temperatures averaging between 24°C (75.2°F) to 31°C (87.8°F) and a significant drop in rainfall to 50mm (1.97"), these months create a marked shift from the earlier high-rainfall period, making it an attractive period for travel.

The new year in Retalhuleu, Guatemala unfolds with a relatively consistent tropical climate, echoing the weather conditions of late December. Rainfall is moderately active, with an average precipitation of 50mm (1.97"). Daylight begins to gradually extend its tenure, adding a subtle enhancement to the warmth of the sun rays. Weather in January »

As winter gives way to spring, February’s weather follows the established weather patterns of January. The minimal variation between these two months provides a steady tropical climate. Interestingly, rainfall slightly decelerates to 30mm (1.18"), signalling a downturn in precipitation. Weather in February »

March comes with an unmistakable hint of summer heat and rainfall returns to January’s average of 50mm (1.97"). This month represents a transitional phase, bridging the divide between the drier start of the year and the forthcoming torrents of the summer season. Weather in March »

April can be defined as the doorway to the imminent rainy season. The temperature hits the annual peak of 32°C (89.6°F) and daylight hours extend a touch further, yet rainfall notably escalates to 80mm (3.15"). Moving from the relatively dry conditions of March to a month that witnesses a precipitous surge in rain, April truly signals the commencement of the summer spell in Retalhuleu, Guatemala. Weather in April »

May marks the real summer in Retalhuleu, Guatemala, with a distinct climate clinging to the trends set in by April. Despite the slightly falling temperatures, the heat remains quite overwhelming. Rainfall becomes significantly prominent, doubling that of April and leading to an intensified 200mm (7.87") of precipitation. Weather in May »

June introduces a palpable shift in Retalhuleu’s climate; it morphs into the year’s rainiest month, with rainfall figures soaring to a notable 360mm (14.17"). Even as daytime stretches its length to its yearly peak, the brilliance of the sun is veiled by persistent clouds and showers. Weather in June »

July weather in Retalhuleu, Guatemala, mirrors that of June. Showers remain significant, marking this month as a continuation of the wettest period of the year. Rainfall measures a abundant 380mm (14.96"), attaining the annual zenith. Weather in July »

Coming onto August, the weather slightly dials back from the peak rainfall of July, but the quantity of showers remains substantial at 360mm (14.17"). The pervasive rain showers, coupled with a warm and substantive tropical climate, continue to characterise August in Retalhuleu, Guatemala. Weather in August »

In September, Retalhuleu bids farewell to the intense downpour phase, as it experiences its final major burst of rain. With an impressive 460mm (18.11") of precipitation, the city sees the tail-end of the wet season. A calming ambiance begins to prevail as the heavy showers start to retreat. Weather in September »

October introduces a significant change in Retalhuleu's weather phenomena. The rainfall returns to June and August levels, averaging 360mm (14.17"), thereby bringing an end to the heightened showers of September. While the temperature remains consistent, the evident reduction in rain begins to mark a transitional phase into the drier season. Weather in October »

November further diminishes the wet period, as rainfall plummets to 150mm (5.91"). This significant respite from previous rainfall announces the advent of a distinctly drier period. The weather in Retalhuleu, Guatemala, starts to show a marked decrease in both the severity and the frequency of rain showers. Weather in November »

December rounds off Retalhuleu’s dry season, witnessing a further contraction in rainfall figures to 50mm (1.97"), returning to January and February levels. This month ushers in an invitingly dry spell, ceasing the heavy downpours that had been a recurrent theme. Weather in December »