Updated October 2026
Buck Island Reef National Monument Weather by Month
Buck Island Reef National Monument is warmest in September, when the nearest NOAA climate station averages a high of 88°F and a low of 79°F, and coldest in February, with an average high of 83°F and an average low of 74°F. November is the wettest month, with about 6 inches of precipitation.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 6.8 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Buck Island Reef National Monument can differ from these, particularly with elevation.
Warmest month
Sep
88°F avg high
Coldest month
Feb
74°F avg low
Wettest month
Nov
6.0 in avg
Longest days
Jun
13.1 h of daylight
Average weather at Buck Island Reef by month
| Month | Avg high | Avg low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 82°F | 74°F | 2.2 in | 11.0 h |
| February | 83°F | 74°F | 1.8 in | 11.4 h |
| March | 83°F | 74°F | 2.2 in | 11.9 h |
| April | 84°F | 76°F | 2.8 in | 12.4 h |
| May | 86°F | 78°F | 4.2 in | 12.8 h |
| June | 87°F | 79°F | 2.7 in | 13.1 h |
| July | 87°F | 79°F | 4.2 in | 13.0 h |
| August | 88°F | 80°F | 3.9 in | 12.6 h |
| September | 88°F | 79°F | 5.1 in | 12.1 h |
| October | 88°F | 78°F | 5.1 in | 11.6 h |
| November | 86°F | 77°F | 6.0 in | 11.1 h |
| December | 84°F | 75°F | 3.2 in | 10.9 h |
| Year total | 43.4 in |
NOAA 1991–2020 climate normals from station VQC00671740, 6.8 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Buck Island Reef is at that time of year.
Buck Island Reef weather by season
Winter: December to February
Average highs hold near 83°F in all three months, with average lows near 74°F. Together the three months average 7.2 inches of precipitation, about 17% of the yearly total and less than in any other season. Daylight is at its shortest, about 10.9 hours in December.
Spring: March to May
Average highs climb from 83°F in March to 86°F in May, with average lows between 74°F and 78°F. Together the three months average 9.2 inches of precipitation, about 21% of the yearly total. Daylight lengthens from about 11.9 hours in March to 12.8 in May.
Summer: June to August
Average highs hold near 87°F in all three months, with average lows near 79°F. Together the three months average 10.8 inches of precipitation, about 25% of the yearly total. Daylight is at its longest, about 13.1 hours in June.
Fall: September to November
Average highs hold near 87°F in all three months, with average lows near 78°F. Together the three months average 16.2 inches of precipitation, about 37% of the yearly total and more than in any other season. Daylight shortens from about 12.1 hours in September to 11.1 in November.
What the National Park Service says about the weather
Welcome to the tropics!
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Buck Island Reef
Averages describe a typical month, not this week. For current conditions and the seven-day outlook, the National Weather Service issues a forecast for the park's reference point at 17.81°N, 64.62°W. It covers that one spot, so other elevations in the park can differ from it, as they do from the averages above.
National Weather Service forecast for Buck Island Reef National Monument →
Weather and crowds together
September, the warmest month, is also the quietest, with about 0.3× the visitors of the park's average month. March is the busiest. To see those crowds set against the weather for all twelve months, read the best time to visit Buck Island Reef National Monument. For hotels, cabins and rentals close to the park, see where to stay near Buck Island Reef.
Where to stay near Buck Island Reef
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Top-rated places to stay near Buck Island Reef
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Frequently Asked Questions
September is the warmest month at Buck Island Reef National Monument, with an average high of 88°F and an average low of 79°F. That is the 1991–2020 average at the nearest long-record NOAA station, 6.8 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
February is the coldest month at Buck Island Reef National Monument, with an average low of 74°F and an average high of 83°F, based on NOAA 1991–2020 climate normals.
November is the wettest month, with about 6 inches of precipitation. February is the driest, at about 1.8 inches. The station records about 43.4 inches of precipitation in an average year.
Daylight at Buck Island Reef National Monument runs from about 10.9 hours a day in December to about 13.1 hours in June, computed from the park's latitude.
Weather at nearby parks
7 mi away · warmest in September (88°F)
9 mi away · warmest in September (88°F)
38 mi away · warmest in August (90°F)
108 mi away · warmest in September (89°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station VQC00671740), daylight computed from latitude, weather description from the National Park Service, crowd levels from National Park Service Visitor Use Statistics (1979–2025). Updated 2026-10-11. Lodging results are provided by Stay22; WhenToVisitParks may earn a commission from bookings, at no extra cost to you.