El Salvador has a tropical climate with two distinct seasons: a rainy season from May through October and a dry season from November through April. Temperatures stay warm year-round, and the country receives between 1,525 and 2,127 millimeters of rain annually, depending on the region. For a small country (roughly the size of New Jersey), El Salvador packs surprising climate variety thanks to differences in elevation across its three geographic zones.
Two Seasons, Not Four
Rather than the spring-summer-fall-winter cycle familiar to temperate climates, El Salvador’s year splits into two halves. Locals call the rainy season “invierno” (winter) even though it runs from May to October, overlapping with the Northern Hemisphere’s summer. The dry season, called “verano” (summer), stretches from November through April, when northeast trade winds dominate and keep skies clear.
The rainy season doesn’t mean constant downpours. Mornings are often sunny, with heavy afternoon or evening thunderstorms that can drop a lot of water in a short time. September is the wettest month. The dry season brings reliably sunny days, lower humidity, and very little rainfall, especially from December through March.
Temperature by Region
El Salvador is divided into three geographic bands: a southern coastal belt along the Pacific, a central valley and plateau region (where the capital San Salvador sits at about 660 meters elevation), and northern mountains that rise above 2,000 meters in places. Each band has its own temperature profile.
Along the coast, temperatures regularly reach the low to mid 30s°C (upper 80s to low 90s°F) and rarely dip below 24°C at night. The central plateau is a few degrees cooler, with daytime highs around 28 to 32°C and more comfortable nights. The northern highlands are noticeably milder, with temperatures that can drop into the mid-teens°C (upper 50s°F) after dark during the dry season. No part of El Salvador experiences frost or cold weather by temperate-zone standards, but the elevation difference between coast and mountains is enough to feel distinctly different.
Rainfall Patterns Across the Country
Average annual rainfall ranges from about 1,526 mm in drier areas to over 2,127 mm in the wettest zones, with a national average around 1,824 mm. The southern coastal slopes and volcanic highlands tend to receive the most rain because moisture-laden Pacific air rises against the terrain. The central valley gets moderate rainfall, while some northern valleys sit in partial rain shadows and receive less.
During the rainy season, most precipitation falls in intense bursts rather than all-day drizzle. Flash flooding is a real hazard, especially in urban areas and along rivers draining the volcanic slopes. The country’s small size and steep terrain mean that water runs off quickly, and the combination of heavy rain and deforested hillsides makes landslides a recurring concern.
Humidity and Comfort Levels
Humidity follows the rainfall calendar closely. In San Salvador, relative humidity peaks at around 86% in September, right at the height of the rainy season. It drops to about 66% in January, during the driest stretch. That 20-point swing makes a noticeable difference in how the heat feels. December through February offer the most comfortable conditions: warm but not oppressive, with clear skies and lower moisture in the air. By contrast, the August-to-October stretch can feel stifling, especially at lower elevations where temperatures and humidity are both high.
Ocean Temperatures Year-Round
El Salvador’s entire coastline faces the Pacific, and sea surface temperatures stay warm throughout the year, never dropping below about 26°C (79°F). During the warmest months, water temperatures along popular surf breaks like La Libertad and El Tunco hover around 28 to 29°C (82 to 84°F). This makes the coast swimmable in any season, though Pacific currents can be strong regardless of temperature.
El Niño, Drought, and Storm Risks
El Salvador’s climate is sensitive to the El Niño-Southern Oscillation cycle. During El Niño years, Central America typically receives less rainfall than normal, and El Salvador has experienced serious drought conditions during strong El Niño events. Crops fail, reservoirs drop, and water rationing becomes common in affected areas. La Niña years tend to bring heavier-than-average rainfall, increasing the risk of flooding and landslides.
The country sits within the broader Atlantic and Pacific hurricane belt. While direct hurricane landfalls on El Salvador are rare because of its Pacific-facing position, tropical storms and their remnants regularly dump enormous amounts of rain on the country during the June-to-November hurricane season. The resulting flooding has historically caused more damage than the winds themselves.
Warming trends are compounding these risks. Across Latin America, average temperatures have risen measurably since 2000, climbing from an average of 23.3°C during 2001 to 2010 to a record 24.3°C in 2024. For El Salvador, this means hotter dry seasons, more intense rainfall events, and less predictable growing conditions for the agriculture that much of the rural population depends on.
Best Months for Visiting
If you’re planning a trip, December through March offers the most reliable weather: sunny days, comfortable humidity, and almost no rain. January and February tend to be slightly cooler than December and have fewer tourists. December is the most popular travel month but also the busiest.
The shoulder months of November and April are transitional. November can still see lingering rain from the tail end of the wet season, while April starts to heat up before the rains arrive in earnest in May. Traveling during the rainy season is entirely possible, especially if you don’t mind afternoon storms, but September and October bring the heaviest downpours and the highest risk of flooding or travel disruptions.