Lethem weather in September 2025

Expect 33°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Lethem in September. Check more long-term weather averages for Lethem in September before you book your next holiday to Guyana in 2025/2026.

  • 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 33°C in Lethem in September with very high heat and humidity, falling to 23°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 68% of daylight hours.

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 83mm.

Lethem September sunrise & sunset times

Browse the sunrise and sunset times for Lethem in September 2025. Select a month to view Lethem sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:54 18:04
Monday, 15th September 2025 05:50 17:58
Tuesday, 30th September 2025 05:47 17:52

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