Lethem weather in September 2026

Expect daytime maximum temperatures of 33°C in Lethem, Guyana in September and very high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 13 days with some rainfall and typically 83 mm of rainfall in the month.

  • 33°C maximum daytime temperature in September in Lethem33
    33°C max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in September in Lethem13
    13 days with some rainfall
  • 23°C minimum night-time temperature in September in Lethem23
    23°C min night temperature
  • 12 hours of daylight per day in September in Lethem12
    12 hours of daylight per day
  • Very high heat & humidity in September in LethemVH
    Very High heat & humidity
  • 83 mm monthly rainfall in September in Lethem83
    83 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Lethem11
    11+ (Extreme) UV index

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The September weather guide for Guyana (Lethem) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Lethem in September?

Daytime temperatures usually reach 31°C in Lethem in September with very high heat and humidity, falling to 24°C at night.

How sunny is it in Lethem in September?

There are normally 8 hours of bright sunshine each day in Lethem in September - that's 64% of daylight hours.

How warm is the sea around Lethem in September?

The average sea temperature around Lethem in September is 29°C.

Does it rain in Lethem in September?

There are usually 13 days with some rain in Lethem in September and the average monthly rainfall is 74mm.

Lethem September sunrise & sunset times

Browse the sunrise and sunset times for Lethem in September 2026. Select a month to view Lethem sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 05:54 18:04
Tuesday, 15th September 2026 05:50 17:58
Wednesday, 30th September 2026 05:47 17:52

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