Weather forecast for todayRetalhuleu, Guatemala

Weather forecast for today

Current condition 11:24 CST

  • 31°C
  • Feels like:
    37°C
Mostly Cloudy
Mostly Cloudy
  • Precipitation: 0mm
  • Wind: 11km/hSE 140°
  • Humidity: 68%
  • Dewpoint: 24°C
  • Pressure: 1011.18mbar
  • Visibility: 9.66km
  • UV index: 8
  • ▼
At the moment, in Retalhuleu, the sky remains mainly cloudy, with little sunshine peeking through.
The temperature is a tropical 31°C, while the felt air temperature, which factors the actual air temperature with the relative humidity, is evaluated at a fiery hot 37°C. The current temperature is almost at the maximum of today's expected 30°C.

Sunday 18. Oct 2026

  • 30°C
  • 23°C
Thunderstorms
Thunderstorms
  • Precip. probability: 100%
  • Precipitation: 39mm
  • Wind: 7km/hS 188°
  • Humidity: 83%
  • UV index: 9
  • Sunrise: 05:58 CST
  • Sunset: 17:45 CST
  • ▼
Today, in Retalhuleu, changing skies could spark thunderstorms.
Intense precipitation of 39mm is expected. Temperatures are predicted to peak at a tropical 30°C and drop to a minimum of a moderately hot 23°C.
The maximum heat index, which combines relative humidity and air temperature, is calculated to be a sweltering 39°C. Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
The highest temperature today will align with the usual October peak of 29°C.
Sunrise was at 05:58 and sunset will be at 17:45; the daylight will last for 11h and 47min.

Hourly overview

Hourly temperatures

Warmest period: 12h - 14h 35°C.
Coldest period: 0h - 2h 27°C.

Chance of precipitation

Highest chance: 14h - 16h 100%.

Hourly weather forecast

  • 12h
  • 29°C
  • Feels like:
    35°C
Thunderstorms
Thunderstorms
  • Precip. probability: 94%
  • Precipitation: 4mm
  • Wind: 10km/hS 181°
  • Humidity: 75%
  • Pressure: 1009mbar
  • Visibility: 10km
  • UV index: 2
  • ▼
  • 13h
  • 30°C
  • Feels like:
    36°C
Thunderstorms
Thunderstorms
  • Precip. probability: 100%
  • Precipitation: 6mm
  • Wind: 11km/hSSW 204°
  • Humidity: 75%
  • Pressure: 1008mbar
  • Visibility: 10km
  • UV index: 5
  • ▼
  • 14h
  • 29°C
  • Feels like:
    35°C
Thunderstorms
Thunderstorms
  • Precip. probability: 100%
  • Precipitation: 7mm
  • Wind: 10km/hSSW 210°
  • Humidity: 77%
  • Pressure: 1007mbar
  • Visibility: 4km
  • UV index: 2
  • ▼
  • 15h
  • 29°C
  • Feels like:
    34°C
Thunderstorms
Thunderstorms
  • Precip. probability: 100%
  • Precipitation: 8mm
  • Wind: 7km/hSSW 200°
  • Humidity: 83%
  • Pressure: 1007mbar
  • Visibility: 7km
  • UV index: 2
  • ▼
  • 16h
  • 27°C
  • Feels like:
    32°C
Thunderstorms
Thunderstorms
  • Precip. probability: 100%
  • Precipitation: 6mm
  • Wind: 5km/hSSW 212°
  • Humidity: 88%
  • Pressure: 1007mbar
  • Visibility: 4km
  • UV index: 1
  • ▼
  • 17h
  • 27°C
  • Feels like:
    31°C
Thunderstorms
Thunderstorms
  • Precip. probability: 100%
  • Precipitation: 3mm
  • Wind: 3km/hSW 218°
  • Humidity: 91%
  • Pressure: 1008mbar
  • Visibility: 3km
  • UV index: 0
  • ▼
Sunset: 17:45
  • 18h
  • 26°C
  • Feels like:
    30°C
Thunderstorms
Thunderstorms
  • Precip. probability: 93%
  • Precipitation: 3mm
  • Wind: 2km/hE 90°
  • Humidity: 94%
  • Pressure: 1009mbar
  • Visibility: 4km
  • UV index: 0
  • ▼
  • 19h
  • 25°C
  • Feels like:
    29°C
Thunderstorms
Thunderstorms
  • Precip. probability: 74%
  • Precipitation: 2mm
  • Wind: 1km/hNE 55°
  • Humidity: 95%
  • Pressure: 1010mbar
  • Visibility: 5km
  • UV index: 0
  • ▼
  • 20h
  • 25°C
  • Feels like:
    28°C
Scattered Thunderstorms
Scattered Thunderstorms
  • Precip. probability: 47%
  • Precipitation: 2mm
  • Wind: 1km/hNE 44°
  • Humidity: 97%
  • Pressure: 1011mbar
  • Visibility: 4km
  • UV index: 0
  • ▼
  • 21h
  • 25°C
  • Feels like:
    28°C
Scattered Thunderstorms
Scattered Thunderstorms
  • Precip. probability: 46%
  • Precipitation: 1mm
  • Wind: 1km/hENE 57°
  • Humidity: 98%
  • Pressure: 1011mbar
  • Visibility: 4km
  • UV index: 0
  • ▼
  • 22h
  • 25°C
  • Feels like:
    28°C
Scattered Thunderstorms
Scattered Thunderstorms
  • Precip. probability: 55%
  • Precipitation: 1mm
  • Wind: 2km/hNE 47°
  • Humidity: 96%
  • Pressure: 1011mbar
  • Visibility: 7km
  • UV index: 0
  • ▼
  • 23h
  • 24°C
  • Feels like:
    28°C
Thunderstorms
Thunderstorms
  • Precip. probability: 60%
  • Precipitation: 2mm
  • Wind: 1km/hNE 36°
  • Humidity: 96%
  • Pressure: 1011mbar
  • Visibility: 5km
  • UV index: 0
  • ▼
Today, in Retalhuleu, thunderstorms and rainy weather are expected.
Rainfall is anticipated for the rest of the day, with precipitation varying from a minimal 1mm to a maximum of 8mm. With moderate precipitation of 8mm, most rainfall is expected at 15h.
The temperature will be between the lowest temperature of 24°C and the highest temperature of 30°C. The feels-like temperature will vary between the lowest temperature of 28°C and the highest temperature of 36°C. The hottest part of the day will be around 13h.
Today, the forecasted high aligns close to the average peak in October. The minimum temperature will be also in line with October's average low of 24°C.
July, September and October, with an average high-temperature of 29°C, are the coldest months in Retalhuleu.
Updated: Oct 18, 2026 @ 17:24:30 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Currently (11:24 CST) it is 31°C in Retalhuleu. Feels-like temperature is 37°C.

Today, in Retalhuleu, expect thunderstorm activity to continue.

Yes, it will rain today. Beware - heavy precipitation of 39mm is anticipated.

Today, the maximum temperature will be 30°C, while the minimum temperature will be 23°C. The maximum heat index, which modifies the air temperature to account for humidity, is assessed at 39°C.
The highest temperature today will be in line with the average maximum temperature in October. The lowest temperature will be also in line with the average low of 24°C.

On Sunday, in Retalhuleu, sunrise was at 05:58 and sunset will be at 17:45 (CST).

Today, the daylight will last for 11h and 47min.