Rio Grande do Norte weather in September
September is one of the best months to visit Rio Grande do Norte: highs of 27°C (81°F) and about 32 mm (1.3 in) of rain on average. Nights average 25°C (77°F) and cloud cover 24% (NASA POWER, 2001–2025 averages). The sea averages 27°C (80°F). It is the 4th driest month of the year and the 3rd coolest. Compared with August, it is about as warm and drier; October brings highs of 28°C (82°F) and 19 mm (0.7 in) of rain.
Figures are long-term averages for Natal, the largest city in Rio Grande do Norte. See below for other places.
Is September a good time to visit Rio Grande do Norte?
best month Weather score 90/100.
Yes. September is one of the best months for weather in Rio Grande do Norte.
Does it rain a lot in Rio Grande do Norte in September?
No, it is usually dry: about 32 mm (1.3 in) falls in an average September. It is the 4th driest month of the year.
How warm is Rio Grande do Norte in September?
Days average 27°C (81°F) and nights 25°C (77°F).
Rio Grande do Norte weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 29°C (83°F) | 26°C (79°F) | 85 mm | 48% | 30°C (85°F) | fair |
| February | 29°C (84°F) | 27°C (80°F) | 95 mm | 53% | 30°C (85°F) | fair |
| March | 29°C (84°F) | 27°C (80°F) | 142 mm | 54% | 30°C (86°F) | least pleasant |
| April | 29°C (84°F) | 27°C (80°F) | 180 mm | 56% | 30°C (86°F) | least pleasant |
| May | 29°C (83°F) | 27°C (80°F) | 157 mm | 46% | 29°C (84°F) | least pleasant |
| June | 28°C (82°F) | 26°C (78°F) | 209 mm | 47% | 28°C (82°F) | least pleasant |
| July | 27°C (81°F) | 25°C (77°F) | 145 mm | 40% | 27°C (80°F) | fair |
| August | 27°C (80°F) | 25°C (76°F) | 63 mm | 27% | 27°C (80°F) | best |
| September | 27°C (81°F) | 25°C (77°F) | 32 mm | 24% | 27°C (80°F) | best |
| October | 28°C (82°F) | 25°C (78°F) | 19 mm | 27% | 27°C (81°F) | best |
| November | 28°C (83°F) | 26°C (78°F) | 16 mm | 29% | 28°C (82°F) | best |
| December | 29°C (83°F) | 26°C (79°F) | 26 mm | 35% | 28°C (83°F) | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months
Weather across Rio Grande do Norte in September
Weather can differ a lot within Rio Grande do Norte: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Natal | 27°C (81°F) | 25°C (77°F) | 32 mm | best |
| Parnamirim | 27°C (81°F) | 25°C (77°F) | 32 mm | best |
| Mossoró | 35°C (95°F) | 22°C (72°F) | 3 mm | best |
| São Gonçalo do Amarante | 31°C (88°F) | 20°C (68°F) | 28 mm | best |
| Macaíba | 31°C (88°F) | 20°C (68°F) | 28 mm | best |
| Ceará-Mirim | 31°C (87°F) | 22°C (71°F) | 21 mm | best |
| Extremoz | 27°C (80°F) | 26°C (78°F) | 23 mm | best |
| Caicó | 35°C (94°F) | 19°C (66°F) | 8 mm | best |
| Açu | 36°C (96°F) | 21°C (69°F) | 5 mm | best |
| São José de Mipibu | 27°C (81°F) | 25°C (77°F) | 32 mm | best |
| Currais Novos | 31°C (87°F) | 18°C (64°F) | 21 mm | best |
| Santa Cruz | 32°C (90°F) | 19°C (65°F) | 19 mm | best |