Weather forecast for todaySanto Tomás La Unión, Guatemala

Weather forecast for today

Current condition 04:32 CST

  • 20°C
  • Feels like:
    20°C
Mostly Cloudy
Mostly Cloudy
  • Precipitation: 0mm
  • Wind: 5km/hNNE 20°
  • Humidity: 91%
  • Dewpoint: 18°C
  • Pressure: 1011.85mbar
  • Visibility: 16.09km
  • UV index: 0
  • ▼
Currently, the sky is cloud-filled, with only small gaps of brightness.
The temperature is a delightful 20°C. The current temperature is at the minimum anticipated for today.

Wednesday 21. Oct 2026

  • 27°C
  • 20°C
Thunderstorms
Thunderstorms
  • Precip. probability: 97%
  • Precipitation: 31mm
  • Wind: 11km/hSW 219°
  • Humidity: 84%
  • UV index: 9
  • Sunrise: 05:58 CST
  • Sunset: 17:42 CST
  • ▼
Today, storm clouds are expected to develop.
Intense precipitation of 31mm is forecasted. The temperature is predicted to vary between a temperate 27°C and an agreeable 20°C.
The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is computed to be a tropical 30°C. Note that heat index values are valued for light wind and location in the shade.
October's typical peak of 28.6°C is expected to be mirrored in the day’s high.
Sunrise will be at 05:58 and sunset at 17:42; the daylight will last for 11h and 44min.

Hourly overview

Hourly temperatures

Warmest hour: 11h 30°C.
Coldest hour: 5h 20°C.

Chance of precipitation

Highest chance: 15h 97%.

Hourly weather forecast

Sunrise: 05:58
  • 6h
  • 20°C
  • Feels like:
    20°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 11%
  • Precipitation: 0mm
  • Wind: 6km/hNNE 22°
  • Humidity: 92%
  • Pressure: 1012mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 8h
  • 23°C
  • Feels like:
    23°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 8%
  • Precipitation: 0mm
  • Wind: 5km/hNNE 14°
  • Humidity: 84%
  • Pressure: 1013mbar
  • Visibility: 16km
  • UV index: 2
  • ▼
  • 10h
  • 26°C
  • Feels like:
    28°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 16%
  • Precipitation: 0mm
  • Wind: 8km/hSSW 213°
  • Humidity: 74%
  • Pressure: 1013mbar
  • Visibility: 16km
  • UV index: 8
  • ▼
  • 12h
  • 27°C
  • Feels like:
    30°C
Thunderstorms
Thunderstorms
  • Precip. probability: 83%
  • Precipitation: 1mm
  • Wind: 10km/hSSW 207°
  • Humidity: 76%
  • Pressure: 1012mbar
  • Visibility: 9km
  • UV index: 5
  • ▼
  • 14h
  • 26°C
  • Feels like:
    29°C
Thunderstorms
Thunderstorms
  • Precip. probability: 85%
  • Precipitation: 1mm
  • Wind: 11km/hSSW 210°
  • Humidity: 79%
  • Pressure: 1011mbar
  • Visibility: 4km
  • UV index: 3
  • ▼
  • 16h
  • 24°C
  • Feels like:
    27°C
Thunderstorms
Thunderstorms
  • Precip. probability: 91%
  • Precipitation: 3mm
  • Wind: 9km/hSSW 206°
  • Humidity: 87%
  • Pressure: 1011mbar
  • Visibility: 4km
  • UV index: 0
  • ▼
Sunset: 17:42
  • 18h
  • 23°C
  • Feels like:
    25°C
Thunderstorms
Thunderstorms
  • Precip. probability: 67%
  • Precipitation: 2mm
  • Wind: 5km/hNNW 335°
  • Humidity: 91%
  • Pressure: 1012mbar
  • Visibility: 4km
  • UV index: 0
  • ▼
  • 20h
  • 22°C
  • Feels like:
    24°C
Showers
Showers
  • Precip. probability: 51%
  • Precipitation: 9mm
  • Wind: 3km/hNNE 27°
  • Humidity: 93%
  • Pressure: 1013mbar
  • Visibility: 7km
  • UV index: 0
  • ▼
  • 22h
  • 22°C
  • Feels like:
    23°C
Few Showers
Few Showers
  • Precip. probability: 32%
  • Precipitation: 1mm
  • Wind: 4km/hNNE 23°
  • Humidity: 90%
  • Pressure: 1014mbar
  • Visibility: 8km
  • UV index: 0
  • ▼
Today, in Santo Tomás La Unión, a combination of lightning-active, cloudy and rainy weather is expected.
Rainfall is forecasted from 11h to 22h. With substantial precipitation of 9mm, most rainfall is expected at 20h.
The temperature will vary between the highest temperature of 27°C and the lowest temperature of 20°C. The warmest part of the day will be at 11h and 12h.
The highest temperature will be consistent with October's average maximum of 28.6°C. The expected low will be also consistent with the average minimum in October, which is 19.2°C.
Updated: Oct 21, 2026 @ 10:32:50 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Currently (04:32 CST) it is 20°C in Santo Tomás La Unión.

On Wednesday, in Santo Tomás La Unión, stormy skies are anticipated.

Yes, it will rain today. Be wary - intense precipitation of 31mm is predicted.

Today, the highest temperature will be 27°C, while the lowest temperature will be 20°C. The maximum heat index, which represents the influence of relative humidity on air temperature, is estimated at 30°C.
The highest temperature will be in line with the average maximum of 28.6°C in October. The lowest temperature will be also in line with the average low of 19.2°C.

On Wednesday, in Santo Tomás La Unión, sunrise will be at 05:58 and sunset at 17:42 (CST).

In Santo Tomás La Unión, today, there will be 11h and 44min of daylight.