In general, satellite forecasts give adequate warnings so that precautions can be taken. Historically, the peaks of the season, when the most damaging storms are formed and hit the island, occur in August and December. If you're heading to Puerto Rico during hurricane season, monitor forecasts made by the National Weather Service and the Weather Channel.
In Puerto Rico, hotels charge their highest prices during the peak winter period from mid-December to mid-April, when visitors fleeing from cold northern climates flock to the Caribbean. Winter is the driest season along the coasts but can be wet in mountainous areas. If you plan to travel in the winter, make reservations 2 to 3 months in advance. At certain hotels it's almost impossible to book accommodations for Christmas and the month of February.
A second tourism high season, especially for hotels and destinations outside San Juan, takes place in July, when most islanders take vacation. The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.
The brighter period of the year lasts for 1. The brightest month of the year in San Juan is April , with an average of 7. The darker period of the year lasts for 3. The darkest month of the year in San Juan is October , with an average of 4. For the purposes of this report, the geographical coordinates of San Juan are The topography within 2 miles of San Juan contains only modest variations in elevation, with a maximum elevation change of feet and an average elevation above sea level of 5 feet.
Within 10 miles contains only modest variations in elevation feet. Within 50 miles contains very significant variations in elevation 4, feet. This report illustrates the typical weather in San Juan, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, to December 31, There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in San Juan.
For each station, the records are corrected for the elevation difference between that station and San Juan according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations. The estimated value at San Juan is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Juan and a given station.
To get a sense of how much these sources agree with each other, you can view a comparison of San Juan and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data. All data relating to the Sun's position e. This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a kilometer grid.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database. Time zones for airports and weather stations are provided by AskGeo. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: 1 are based on computer models that may have model-based errors, 2 are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and 3 have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. Please review our full terms contained on our Terms of Service page. You're permitted to use this graph as long as you provide prominent attribution with a link back close to the use of the graph.
For print usage, please acquire a license. Full Year. Spring Summer Fall Winter. Climate in San Juan Link. History: San Juan weather by month. Click on each chart for more information. The daily average high red line and low blue line temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight. Compare San Juan to another city:.
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. Climate - Puerto Rico Average weather, temperature, rainfall, when to go, what to pack. As regards to the rains , the hot and muggy period from May to October tends to be rainy everywhere, while in the first months when the north-east trade winds blow November and December, and partly January , the rains are still abundant on the slopes facing north and east.
In contrast, on the southern coast, there's a relative decrease in rainfall in June and July.
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