La Unión Temperature by Month
La Unión in La Unión department, El Salvador enjoys a stable climate, with daytime temperatures staying close to 32°C (90°F) throughout the year. Explore the full monthly breakdown below.
La Unión Monthly Temperatures
With little seasonal fluctuation, La Unión offers a predictable and steady climate. Maximum daytime temperatures reach a very warm 33°C (91°F) in April and a very warm 31°C (88°F) in January. At night, lows range from 26°C (79°F) to 24°C (75°F) throughout the year.
The chart below illustrates the average maximum day and minimum night temperatures in La Unión by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest.
The chart below shows the average temperature throughout the year:
Temperature: La Unión vs El Salvador
The map below shows the annual temperature across El Salvador. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
La Unión vs World: Temperature Compared
La Unión's average annual maximum temperature is 32°C (90°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Beijing, China averages 20°C (68°F) annually, but with big seasonal swings — very cold winters and hot summers.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
What Does the Temperature Feel Like in La Unión?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In La Unión, January is the coolest month, with average highs of 32°C (90°F) and humidity around 58% — considered moderate. In April, the warmest month, temperatures average 33°C (91°F) with 63% humidity — conditions that feel high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on La Unión's weather — including monthly rainfall, sunshine hours, and humidity — visit our La Unión climate page.
