Weather forecast for 10 daysLethem, Guyana

Weather forecast for the weekend

Saturday 17. Oct 2026

  • 36°C
  • 26°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0mm
  • Wind: 27km/hE 80°
  • Humidity: 44%
  • UV index: 11
  • Sunrise: 05:43 -04
  • Sunset: 17:45 -04
  • ▼
Today, on Saturday, 17th of October, expect a partly sunny afternoon with variable cloud cover.
Forecasted temperature values will span from a fiery hot 36°C down to a warm 26°C.
The maximum heat index, which integrates air moisture with ambient temperature, is evaluated at a blistering 41°C. Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Today, the forecasted high will be a few degrees higher than October's typical maximum of 33°C.
Sunrise was at 05:43 and sunset will be at 17:45; the daylight will last for 12h and 2min.

Sunday 18. Oct 2026

  • 37°C
  • 26°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0mm
  • Wind: 25km/hE 81°
  • Humidity: 49%
  • UV index: 11
  • Sunrise: 05:43 -04
  • Sunset: 17:45 -04
  • ▼
On Sunday, in Lethem, sunny moments will alternate with patchy cloud cover.
Expected temperature values will span from a sizzling 37°C down to a warm 26°C.
The maximum heat index, which combines air temperature and relative humidity, is computed to be a burning hot 45°C. Note that heat index values are valued for light wind and location in the shade. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees.
The anticipated peak temperature today will be a few degrees higher than the average October maximum of 33°C.
Sunrise will be at 05:43 and sunset at 17:45; tomorrow's daylight will last for 12h and 2min.

10-day overview

Daily temperatures

Warmest period: Wednesday - Monday 38°C.
Coldest day: today 36°C.

Chance of precipitation

Highest chance: tomorrow 24%.

Long-term weather forecast

  • Saturday
  • 17. Oct 2026
  • 36°C
  • 26°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0mm
  • Wind: 27km/hE 80°
  • Humidity: 44%
  • UV index: 11
  • Sunrise: 05:43 -04
  • Sunset: 17:45 -04
  • ▼
  • Sunday
  • 18. Oct 2026
  • 37°C
  • 26°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0mm
  • Wind: 25km/hE 81°
  • Humidity: 49%
  • UV index: 11
  • Sunrise: 05:43 -04
  • Sunset: 17:45 -04
  • ▼
  • Monday
  • 19. Oct 2026
  • 37°C
  • 26°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 23%
  • Precipitation: 0mm
  • Wind: 23km/hE 87°
  • Humidity: 54%
  • UV index: 11
  • Sunrise: 05:43 -04
  • Sunset: 17:45 -04
  • ▼
  • Tuesday
  • 20. Oct 2026
  • 37°C
  • 26°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 14%
  • Precipitation: 0mm
  • Wind: 22km/hE 88°
  • Humidity: 51%
  • UV index: 11
  • Sunrise: 05:42 -04
  • Sunset: 17:44 -04
  • ▼
  • Wednesday
  • 21. Oct 2026
  • 38°C
  • 26°C
Mostly Sunny
Mostly Sunny
  • Precip. probability: 10%
  • Precipitation: 0mm
  • Wind: 26km/hE 82°
  • Humidity: 47%
  • UV index: 11
  • Sunrise: 05:42 -04
  • Sunset: 17:44 -04
  • ▼
  • Thursday
  • 22. Oct 2026
  • 38°C
  • 26°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0mm
  • Wind: 26km/hE 82°
  • Humidity: 44%
  • UV index: 11
  • Sunrise: 05:42 -04
  • Sunset: 17:44 -04
  • ▼
  • Friday
  • 23. Oct 2026
  • 38°C
  • 26°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 8%
  • Precipitation: 0mm
  • Wind: 25km/hE 85°
  • Humidity: 45%
  • UV index: 11
  • Sunrise: 05:42 -04
  • Sunset: 17:44 -04
  • ▼
  • Saturday
  • 24. Oct 2026
  • 38°C
  • 27°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0mm
  • Wind: 24km/hE 87°
  • Humidity: 45%
  • UV index: 11
  • Sunrise: 05:42 -04
  • Sunset: 17:44 -04
  • ▼
  • Sunday
  • 25. Oct 2026
  • 38°C
  • 27°C
Mostly Sunny
Mostly Sunny
  • Precip. probability: 7%
  • Precipitation: 0mm
  • Wind: 26km/hE 82°
  • Humidity: 46%
  • UV index: 11
  • Sunrise: 05:42 -04
  • Sunset: 17:43 -04
  • ▼
  • Monday
  • 26. Oct 2026
  • 38°C
  • 27°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 3%
  • Precipitation: 0mm
  • Wind: 26km/hE 80°
  • Humidity: 45%
  • UV index: 11
  • Sunrise: 05:42 -04
  • Sunset: 17:43 -04
  • ▼
It is expected that primarily dull and occasionally mostly clear weather is forecasted.
Rainfall is not predicted in Lethem in the upcoming days.
Fluctuations in temperature will be barely perceptible in the upcoming period. Maximum temperatures will fall between 36°C and 38°C, while the lowest nightly temperature differences will be also negligible, as the minimum temperature will fluctuate between 26°C and 27°C.
The hottest days in Lethem, Guyana, will be Wednesday through next Monday, with a maximum of 38°C; today is the coldest day, with a maximum temperature of 36°C.
Taking the humidity into consideration, the maximum feel-like temperature may increase considerably and range between a blistering 41°C and a burning hot 48°C.
January through April, September through December, with an average high-temperature of 33°C, are the warmest months in Lethem.
Updated: Oct 17, 2026 @ 14:03:57 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, occasional cloudiness will be present, but there will still be plenty of sun.

Today, the maximum temperature will be 36°C, while the minimum temperature will be 26°C. The maximum heat index, which factors the actual air temperature with the relative humidity, is computed to be 41°C.
The maximum temperature today will be a few degrees higher than the average highest temperature in October. The lowest temperature today will be in line with the average low temperature.

On Saturday, in Lethem, sunrise was at 05:43 and sunset will be at 17:45 (-04).

Today, the daylight will last for 12h and 2min.

On Sunday, partly cloudy skies will persist, making for a mix of sun and clouds.

Tomorrow, the maximum temperature will be 37°C, while the minimum temperature will be 26°C. The maximum heat index, which integrates air moisture with ambient temperature, is computed to be 45°C.
The highest temperature will be relatively higher than the average maximum of 33°C in October. Tomorrow, the lowest temperature will be in line with the average low temperature.

On Sunday, in Lethem, sunrise will be at 05:43 and sunset at 17:45 (-04).

In Lethem, Guyana, the length of the day tomorrow will be 12h and 2min.