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Climate · Río San Juan

Río San Juan in September

Hot and wet, as the days shorten.

Typical weather, averaged over 30 years

September in Río San Juan is hot: highs near 90°F, lows near 75°F. Rain falls on about six days a week, more often as the month goes on, and the days shorten by 24 minutes from the first week to the last.September in Río San Juan is hot: highs near 32°C, lows near 24°C. Rain falls on about six days a week, more often as the month goes on, and the days shorten by 24 minutes from the first week to the last.

High
90°F32°Caverage
Low
75°F24°Caverage
Wet days
6a week · 84% of days
Daylight
12h 13mon average

Is September a good time to visit Río San Juan?

A good month, just outside Río San Juan's best months, which run from December to March.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 90°F in September, against 83°F to 90°F through the year.Highs near 32°C in September, against 28°C to 32°C through the year.

Chance of a wet day

84% of days in September, against 60% to 87% through the year.

Cloud cover

67% cover in September, against 27% to 69% through the year.

Daylight

12h 13m in September, against 10h 58m to 13h 18m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August89°32°low 76°low 24°6 wet days a weekRain on about six days a week.
  2. September90°32°low 75°low 24°6 wet days a weekRain on about six days a week.
  3. October89°32°low 75°low 24°6 wet days a weekRain on about six days a week.

Where Río San Juan sits, in September

America/Santo Domingo
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
6:27 AMsets 6:44 PM
Above the sea
20 mlow-lying
Latitude
19.6°Nnorthern hemisphere
Nearest of ours
Santo Domingo132 km south

The land around Río San Juan, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Dominican Republic in September

high · low · wet days
See September on the planning mapThe whole year in Río San Juan

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Río San Juan. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (20 m) against the climate model's (93 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (20 m) against the climate model's (93 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.