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 93°
- Humidity: 51%
- UV index: 11
- Sunrise: 05:42 -04
- Sunset: 17:44 -04
- details ▼
Tomorrow, expect predominantly cloudy skies to persist.
The temperature will fluctuate from a high of a sweltering 37°C to a low of a moderately hot 26°C.
The maximum heat index, which integrates air moisture with ambient temperature, is assessed at a dangerously hot 46°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.
Forecasts suggest the maximum temperature will be a couple of degrees higher than October's average of 33°C.
Sunrise will be at 05:42 and sunset at 17:44; tomorrow's daylight will last for 12h and 2min.
The temperature will fluctuate from a high of a sweltering 37°C to a low of a moderately hot 26°C.
The maximum heat index, which integrates air moisture with ambient temperature, is assessed at a dangerously hot 46°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.
Forecasts suggest the maximum temperature will be a couple of degrees higher than October's average 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 hour: 6h 29°C.
Coldest hour: 6h 29°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: 8%
- 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: 13%
- Precipitation: 0mm
- Wind: 12km/hE 94°
- Humidity: 84%
- Pressure: 1008mbar
- Visibility: 16km
- UV index: 0
- details ▼
Sunrise: 05:42
- 6h
- 26°C
- Feels like:29°C
Mostly Cloudy
- Precip. probability: 11%
- Precipitation: 0mm
- Wind: 13km/hE 93°
- Humidity: 85%
- Pressure: 1009mbar
- Visibility: 16km
- UV index: 0
- details ▼
- 8h
- 29°C
- Feels like:33°C
Mostly Sunny
- Precip. probability: 3%
- 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: 6%
- 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 103°
- 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 102°
- Humidity: 40%
- 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: 58%
- 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 91°
- Humidity: 62%
- Pressure: 1008mbar
- Visibility: 16km
- UV index: 0
- details ▼
Tomorrow, on Tuesday, primarily cloudy and occasionally sun-filled weather is predicted.
The temperature will be between the lowest temperature of 26°C and the highest temperature of 36°C. The feels-like temperature will be between the lowest temperature of 29°C and the highest temperature of 41°C. The hottest part of the day will be from 13h to 16h.
The forecasted high will be moderately higher than the typical October maximum of 33°C. The minimum temperature will be also similar to October's average low of 24°C.
The warmest months are January through April, September through December, with an average high-temperature of 33°C.
The temperature will be between the lowest temperature of 26°C and the highest temperature of 36°C. The feels-like temperature will be between the lowest temperature of 29°C and the highest temperature of 41°C. The hottest part of the day will be from 13h to 16h.
The forecasted high will be moderately higher than the typical October maximum of 33°C. The minimum temperature will be also similar to October's average low of 24°C.
The warmest months are January through April, September through December, with an average high-temperature of 33°C.
Updated: Oct 19, 2026 @ 12:25:47 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
Tomorrow, a low, thick cloud deck is likely to persist.
Tomorrow, the highest temperature will be 37°C, while the lowest temperature will be 26°C. The maximum heat index, which reflects the perceived temperature due to humidity levels, is evaluated at 46°C.
The highest temperature will be a few degrees higher 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 a few degrees higher 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).
Tomorrow, the daylight will last for 12h and 2min.





