Río Grande in September
6.5out of 10
Possible, with caveats
Hot: daytime highs around 31°C. Very wet: about 15 rainy days.
31°CAvg high
24°CAvg low
15Rainy days (75 mm)
12:06 hDaylight
06:34Sunrise · 18:41 Sunset
Why this score
- Hot: daytime highs around 31°C
- Very wet: about 15 rainy days
What to wear and pack
- Light, breathable clothing
- Shorts or a light skirt
- Rain jacket or compact umbrella
- Sunscreen, sunglasses and a hat
How reliable is the forecast?
Rain in September varies a lot between years (±3.6 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 27°C | 21°C | 61 mm | 11 | – | – | 7.6 |
| February | 27°C | 21°C | 44 mm | 9 | – | – | 7.9 |
| March | 28°C | 21°C | 61 mm | 10 | – | – | 7.7 |
| April | 28°C | 22°C | 62 mm | 12 | – | – | 7.4 |
| May | 29°C | 23°C | 84 mm | 16 | – | – | 6.8 |
| June | 31°C | 24°C | 42 mm | 10 | – | – | 7.3 |
| July | 31°C | 24°C | 35 mm | 10 | – | – | 7.3 |
| August | 31°C | 25°C | 46 mm | 11 | – | – | 7.1 |
| September | 31°C | 24°C | 75 mm | 15 | – | – | 6.5 |
| October | 30°C | 24°C | 83 mm | 16 | – | – | 6.6 |
| November | 28°C | 23°C | 87 mm | 16 | – | – | 7.0 |
| December | 27°C | 22°C | 63 mm | 12 | – | – | 7.5 |
Frequently asked questions
How hot is Río Grande in September?
Daytime highs average 31°C and nights about 24°C.
When is the best time to visit Río Grande?
The best months are February, March, January, December.