Weather forecast for tomorrowLethem, Guyana
Weather forecast for tomorrow
Tuesday 20. Oct 2026
- 37°C
- 26°C
Mostly Cloudy
- Precip. probability: 13%
- Precipitation: 0mm
- Wind: 19km/hE 94°
- Humidity: 50%
- UV index: 11
- Sunrise: 05:42 -04
- Sunset: 17:44 -04
- details ▼
Tomorrow, on Tuesday, 20th of October, a low, thick cloud deck is likely to persist.
The maximum temperature will be a torrid 37°C, while the minimum temperature will be a warm 26°C.
The maximum heat index, which modifies the air temperature to account for humidity, is estimated at a searing 46°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.
The temperature is forecasted to be relatively higher than the standard October peak of 33°C.
Sunrise will be at 05:42 and sunset at 17:44; tomorrow's daylight will last for 12h and 2min.
The maximum temperature will be a torrid 37°C, while the minimum temperature will be a warm 26°C.
The maximum heat index, which modifies the air temperature to account for humidity, is estimated at a searing 46°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.
The temperature is forecasted to be relatively higher than the standard October peak of 33°C.
Sunrise will be at 05:42 and sunset at 17:44; tomorrow's daylight will last for 12h and 2min.
Hourly overview
Hourly temperatures
Warmest hour: 15h 41°C.
Coldest period: 3h - 6h 30°C.
Coldest period: 3h - 6h 30°C.
Chance of precipitation
Highest chance: 15h 13%.
Hourly weather forecast
- 0h
- 28°C
- Feels like:32°C
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0mm
- Wind: 9km/hE 98°
- Humidity: 74%
- Pressure: 1008mbar
- Visibility: 16km
- UV index: 0
- details ▼
- 2h
- 27°C
- Feels like:31°C
Mostly Cloudy
- Precip. probability: 6%
- Precipitation: 0mm
- Wind: 9km/hE 97°
- Humidity: 78%
- Pressure: 1007mbar
- Visibility: 16km
- UV index: 0
- details ▼
- 4h
- 27°C
- Feels like:30°C
Mostly Cloudy
- Precip. probability: 12%
- Precipitation: 0mm
- Wind: 12km/hE 94°
- Humidity: 83%
- Pressure: 1008mbar
- Visibility: 16km
- UV index: 0
- details ▼
Sunrise: 05:42
- 6h
- 26°C
- Feels like:30°C
Mostly Cloudy
- Precip. probability: 9%
- Precipitation: 0mm
- Wind: 13km/hE 93°
- Humidity: 84%
- Pressure: 1009mbar
- Visibility: 16km
- UV index: 0
- details ▼
- 8h
- 29°C
- Feels like:34°C
Mostly Sunny
- Precip. probability: 2%
- Precipitation: 0mm
- Wind: 17km/hE 81°
- Humidity: 69%
- Pressure: 1011mbar
- Visibility: 16km
- UV index: 4
- details ▼
- 10h
- 33°C
- Feels like:38°C
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0mm
- Wind: 19km/hE 83°
- Humidity: 54%
- Pressure: 1011mbar
- Visibility: 16km
- UV index: 11
- details ▼
- 12h
- 35°C
- Feels like:40°C
Cloudy
- Precip. probability: 7%
- Precipitation: 0mm
- Wind: 16km/hE 95°
- Humidity: 44%
- Pressure: 1008mbar
- Visibility: 16km
- UV index: 10
- details ▼
- 14h
- 36°C
- Feels like:41°C
Cloudy
- Precip. probability: 13%
- Precipitation: 0mm
- Wind: 15km/hESE 104°
- Humidity: 39%
- Pressure: 1006mbar
- Visibility: 16km
- UV index: 6
- details ▼
- 16h
- 36°C
- Feels like:40°C
Mostly Cloudy
- Precip. probability: 10%
- Precipitation: 0mm
- Wind: 16km/hESE 103°
- Humidity: 39%
- Pressure: 1005mbar
- Visibility: 16km
- UV index: 2
- details ▼
Sunset: 17:44
- 18h
- 33°C
- Feels like:36°C
Mostly Cloudy
- Precip. probability: 1%
- Precipitation: 0mm
- Wind: 14km/hE 95°
- Humidity: 48%
- Pressure: 1006mbar
- Visibility: 16km
- UV index: 0
- details ▼
- 20h
- 31°C
- Feels like:34°C
Mostly Clear
- Precip. probability: 0%
- Precipitation: 0mm
- Wind: 11km/hE 91°
- Humidity: 57%
- Pressure: 1007mbar
- Visibility: 16km
- UV index: 0
- details ▼
- 22h
- 29°C
- Feels like:32°C
Partly Cloudy
- Precip. probability: 0%
- Precipitation: 0mm
- Wind: 11km/hE 93°
- Humidity: 62%
- Pressure: 1008mbar
- Visibility: 16km
- UV index: 0
- details ▼
Tomorrow, primarily cloud-filled and occasionally bright weather is predicted.
The temperature will vary between a minimum of 26°C and a maximum of 37°C. The feels-like temperature will vary between a minimum of 30°C and a maximum of 41°C. The hottest part of the day is anticipated around 15h.
The forecasted high will be relatively higher than the typical October maximum of 33°C. The minimum temperature will be also comparable to October's average low of 24°C.
January through April, September through December, with an average high-temperature of 33°C, are the warmest months in Lethem.
The temperature will vary between a minimum of 26°C and a maximum of 37°C. The feels-like temperature will vary between a minimum of 30°C and a maximum of 41°C. The hottest part of the day is anticipated around 15h.
The forecasted high will be relatively higher than the typical October maximum of 33°C. The minimum temperature will be also comparable to October's average low of 24°C.
January through April, September through December, with an average high-temperature of 33°C, are the warmest months in Lethem.
Updated: Oct 19, 2026 @ 14:27:40 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
On Tuesday, expect continuous cloudiness with subdued daylight.
Tomorrow, the maximum temperature will be 37°C, while the minimum temperature will be 26°C. The maximum heat index, which adjusts the air temperature based on humidity, is estimated at 46°C.
The highest temperature will be slightly warmer than the average maximum of 33°C in October. The lowest temperature will be in line with the average low of 24°C.
The highest temperature will be slightly warmer than the average maximum of 33°C in October. The lowest temperature will be in line with the average low of 24°C.
On Tuesday, in Lethem, sunrise will be at 05:42 and sunset at 17:44 (-04).
In Lethem, Guyana, the length of the day tomorrow will be 12h and 2min.





