What is the hottest month at Dry Tortugas?

August, with an average high of 91°F and an average low of 79°F at Dry Tortugas (NOAA 1991–2020 normals). The station averages 91 days a year at or above 90°F.

How cold does Dry Tortugas get in winter?

January is the coldest month, averaging a low of 65°F and a high of 74°F at Dry Tortugas. Freezing nights are rare at this station.

Does it snow at Dry Tortugas?

Dry Tortugas records almost no snowfall (no snow normals). Higher elevations in the park can differ.

When is the rainy season at Dry Tortugas?

September is the wettest month on average (7.2 inches of precipitation at Dry Tortugas); the station's annual total is 37.6 inches.

How many hours of daylight does Dry Tortugas get?

About 13h 39m on June 15 and 10h 37m on December 15 (sunrise 6:42 AM, sunset 8:22 PM in June; 7:08 AM to 5:45 PM in December, America/New York time).

What is the best month to visit Dry Tortugas for weather?

By NOAA's normals, average highs sit between 55°F and 85°F in January, February, March, April, October, November and December. Of those, October is also well below the park's peak crowds. Weather in the park varies with elevation; this is the Dry Tortugas station.

Weather by month

Dry Tortugas weather, month by month

Last verified October 6, 2026NOAA 1991–2020 normalsAmerica/New York time

Average highs, lows, rain, snow and daylight for every month. Measured at the Dry Tortugas (3 ft, 0.1 mi from Garden Key Visitor Center).

A few of the stars at night with a view of Fort Jefferson. — Photo: NPS Photo / Brett Seymour

Aug high: 91°F; hottest month
Jan low: 65°F; coldest month
Rain + snowmelt: 37.6in / yr; wettest: Sep
Snowfall: —in / yr; rare
Days ≥ 90°F: 91/ yr
Nights ≤ 32°F: 0/ yr

Dry Tortugas

Month by month

Normals are 30-year averages (1991–2020). Crowds = each month’s share of the park’s busiest month, from NPS visitor counts. Sunrise and sunset are for the 15th of each month in 2027.

Average high and low, every monthbars run from the low to the high · tan strip = precipitation

Month	High	Low	Rain	Wet days	Sunrise	Sunset	Daylight	Crowds
Jan	74°	65°	2.4″	7	7:18 AM	6:04 PM	10h 46m	81
Feb	76°	66°	1.7″	6	7:05 AM	6:26 PM	11h 20m	75
Mar	79°	68°	2.1″	4	7:41 AM	7:40 PM	11h 60m	91
Apr	83°	71°	2.6″	4	7:10 AM	7:53 PM	12h 44m	91
May	86°	75°	2.0″	5	6:48 AM	8:08 PM	13h 20m	100
Jun	89°	77°	4.3″	7	6:42 AM	8:22 PM	13h 39m	94
Jul	91°	78°	2.2″	9	6:52 AM	8:23 PM	13h 31m	86
Aug	91°	79°	4.3″	10	7:06 AM	8:06 PM	13h 00m	74
Sep	89°	78°	7.2″	12	7:18 AM	7:36 PM	12h 18m	67
Oct	85°	76°	4.7″	10	7:29 AM	7:05 PM	11h 36m	57
Nov	79°	71°	1.9″	4	6:47 AM	5:45 PM	10h 57m	74
Dec	76°	67°	2.4″	6	7:08 AM	5:45 PM	10h 37m	84

Sweet spot: October combines average highs between 55°F and 85°F with crowds under 60% of the peak month. Check what is open in those months — quiet can also mean closed roads.

How to read this

These are NOAA’s official 1991–2020 climate normals for one weather station, not a model of the whole park. The station is the one with complete temperature and precipitation normals nearest to a visitor center. Highs and lows are daily averages for the month; “wet days” are days with at least 0.01 inch of precipitation. Mountain parks can be 10–20 °F cooler at their high points than at the station, and the NPS weather page for Dry Tortugas is the place for current conditions and seasonal closures.

Sunrise and sunset are computed with the NOAA solar equations for the park’s coordinates and shown in America/New York time for the 15th of each month of 2027; they are accurate to about a minute.

Sources · 3

1.U.S. Climate Normals 1991–2020 — monthly normals station inventory · National Centers for Environmental Information (NOAA)
2.Dry Tortugas National Park — Weather (nps.gov) · National Park Service
3.Dry Tortugas National Park — Visitor Use Statistics · National Park Service (IRMA)

FAQ

Dry Tortugas weather questions

What is the hottest month at Dry Tortugas?: August, with an average high of 91°F and an average low of 79°F at Dry Tortugas (NOAA 1991–2020 normals). The station averages 91 days a year at or above 90°F.
How cold does Dry Tortugas get in winter?: January is the coldest month, averaging a low of 65°F and a high of 74°F at Dry Tortugas. Freezing nights are rare at this station.
Does it snow at Dry Tortugas?: Dry Tortugas records almost no snowfall (no snow normals). Higher elevations in the park can differ.
When is the rainy season at Dry Tortugas?: September is the wettest month on average (7.2 inches of precipitation at Dry Tortugas); the station's annual total is 37.6 inches.
How many hours of daylight does Dry Tortugas get?: About 13h 39m on June 15 and 10h 37m on December 15 (sunrise 6:42 AM, sunset 8:22 PM in June; 7:08 AM to 5:45 PM in December, America/New York time).
What is the best month to visit Dry Tortugas for weather?: By NOAA's normals, average highs sit between 55°F and 85°F in January, February, March, April, October, November and December. Of those, October is also well below the park's peak crowds. Weather in the park varies with elevation; this is the Dry Tortugas station.

Park'd · free on iPhone & Android

Plan Dry Tortugas for the right month.

Park'd keeps your parks, trips and photos in one place — and tells you what to do once you're there.