Continue the journey west and stop in Cabarete and Sosa for watersports, and then Puerto Plata, a UNESCO-listed city. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day. A Hurricane Watch is in effect for the coast of the Dominican Republic from Cabo Caucedo to Puerto Plata. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Often it will rain hard, and then be sunny a few minutes later. You can also take boat trips to a romantic island called Caya Levantado as well as Los Haitises National Park, with rugged rock formations and caves known for petroglyphs. This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Dominican Republic weather in September has a lower risk of rain than most Caribbean destinations. The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7). Daily low temperatures are around 74F, rarely falling below 72F or exceeding 76F. Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 72 F. Time/General. September is considered summer in the Dominican Republic, and although the temperatures dont fluctuate significantly from season to season in tropical locales, September readings tend to be slightly above the general annual average. The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than. The highest average surface water temperature during September is 84F on September 24. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest). 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. Keep in mind that this is peak hurricane season, but gutsy travelers will be rewarded with some of the lowest prices of the year (just don't skimp on travel insurance). You'll want to limit outdoor exercise, drink plenty of water, and perhaps take a siesta in the afternoonthis is a Spanish-speaking country after all. For the purposes of this report, the geographical coordinates of Dominican Republic are 19.000 deg latitude, -70.667 deg longitude, and 0 ft elevation. It's not uncommon for it to rain every day, but in short bursts, or at night. For the purposes of this report, the geographical coordinates of Santo Domingo are 18.500 deg latitude, -69.989 deg longitude, and 180 ft elevation. //