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Weather extremes

How extreme does Guantánamo's weather get?

The hottest, coldest, wettest and snowiest days Guantánamo has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 50+ years of daily weather observations (1971–present), from the Guantanamo Bay Nas station 28 km away. Updated through May 2026 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Guantánamo has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
104°F Jul 28, 2019

That is about 12°F hotter than a normal July afternoon in Guantánamo (typical high near 92°F).

The three most extreme on record

1 104°F Jul 28, 2019
2 102°F Aug 2, 2017
3 102°F Aug 3, 2017
❄️ Coldest night
25°F Sep 29, 1991

About 51°F colder than a normal September night in Guantánamo (typical low near 76°F).

The three most extreme on record

1 25°F Sep 29, 1991
2 36°F Jan 14, 2025
3 37°F Sep 25, 1997
🌧️ Most rain in one day
10.12 in Jun 7, 2011

More rain in a single day than Guantánamo usually gets in the whole month of June (typical June total about 1.6 in).

The three most extreme on record

1 10.12 in Jun 7, 2011
2 7.22 in May 11, 1977
3 6.65 in Nov 25, 1993

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

10°30°50°70°90°110°130° all-time high 104°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Guantánamo's record heat sits well above even a hot day for the season — July's 104°F is about 12°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Guantánamo's warmest days reach the low 90s°F and its coldest nights drop to the high 60s°F. But across the record it has gone as high as 104°F and as low as 25°F. A single day has delivered over 10 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 26 years of daily observations at Guantanamo Bay Nas, a weather station, about 28 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →