San Carlos Temperature by Month

The average annual maximum temperature in San Carlos, Rio San Juan Region, Nicaragua is 30°C (86°F), with little variation between seasons. This page covers monthly averages, day-night differences, and how San Carlos compares to cities worldwide.

With little seasonal fluctuation, San Carlos offers a predictable and steady climate. Maximum daytime temperatures reach a very warm 32°C (90°F) in April and a comfortable 29°C (84°F) in January. At night, lows range from 24°C (75°F) to 22°C (72°F) throughout the year.

The chart below illustrates the average maximum day and minimum night temperatures in San Carlos by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM.

The chart below shows the average temperature throughout the year:

San Carlos's average annual maximum temperature is 30°C (86°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

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 San Carlos, January is the coolest month, with average highs of 29°C (84°F) and humidity around 86%, considered very high. In April, the warmest month, temperatures average 32°C (90°F) with 78% 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.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in San Carlos this rarely lasts long on the ground.

For more on San Carlos's weather, including monthly rainfall, sunshine hours, and humidity, visit our San Carlos climate page.