Rupununi savannah around Lethem ranks among Guyana’s darkest accessible horizons. Dry-season nights reward wide-field Milky Way and satellite watching when dust settles.
Wet-season thunderstorms can scrub the sky clean for short windows after dusk.
Guyana · Rupununi · ~3.4°N
Check the live Tonight score for Lethem (cloud, dew, transparency, and astronomical dark), then read the hourly cloud timing chart and moonless dark window on this page.
Use the best clear window clock times after astronomical darkness, and prefer moonless hours when deep-sky contrast matters.
This hub shows moonrise, moonset, illumination, and the longest moonless astronomical-dark interval for Lethem. Open Dark Sky Window for the full ephemeris card.
ISS passes are spottable near dusk or dawn when the sky is dark and the station is still sunlit. This page lists the next spottable pass when available.
Learn: Is tonight good for stargazing? · How to see the Milky Way