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La Rioja Weather in September
With daytime temperatures of 23°C (73°F) and nighttime lows of 11°C (52°F), September in La Rioja brings high temperatures during the day. The excellent weather makes it an appealing time to visit.
Rainfall in La Rioja in September
Records from the past 30 years suggest around 2 days of rain, with 35 mm (1.4 in) average for the month. Showers tend to be short but heavy rather than persistent drizzle. When it rains, it usually means it, but it doesn't last long.
Temperature in La Rioja in September
The excellent temperature in La Rioja in September makes it a solid month to visit, with 23°C (73°F) during the day and 11°C (52°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 11°C (52°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in La Rioja in September
Enjoy a sunny month with about 230 hours of sunshine, the clear skies make La Rioja even more beautiful.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
La Rioja Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
23°C (73°F)
Chance of Rain
7%
Precipitation
35 mm (1.4 in)
Rainy days
2 days
Humidity
49%
Sunshine
230 hours
Percentage Sunshine
63%
La Rioja Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in La Rioja - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in La Rioja typically rise from around 24°C (75°F) at the start of September to approximately 27°C (81°F) by the end. Nights are cool, with lows typically ranging from 9°C (48°F) to 14°C (57°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for La Rioja in September
Browse day-by-day weather records for La Rioja spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
La Rioja historical weather extremes in September
Based on 48 years of weather observations in La Rioja between 1978 and 2026, these are the recorded extremes.
- La Rioja recorded its highest September temperature of 41°C (106°F) on September 30, 2024.
- La Rioja experienced its chilliest September day on September 13, 1981, reaching only 8°C (46°F).
- The coldest night in September in La Rioja was on September 1, 1993, with a minimum of -1°C (30°F).
Best Places in Argentina in September
Find out more about the weather in Argentina and which places have the best travel conditions in this month. See all of Argentina in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in La Rioja in September
For La Rioja in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Some rain is possible, so pack something to handle light showers. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in La Rioja in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming10/10 -
Cycling10/10 -
Walking10/10 -
Barbeque9/10 -
Camping10/10 -
Outdoor sports10/10
La Rioja 3-Day Forecast
More climate data for La Rioja
Temperature Rainfall Sunshine Humidity
See the full La Rioja climate overview or explore weather in Argentina.
Popular in September
Where to go in September - average daytime high across popular destinations.
Córdoba
23°C (73°F) Salta21°C (70°F) Mendoza20°C (68°F) Buenos Aires
20°C (68°F) Mar del Plata16°C (61°F) San Martín de los Andes
8°C (46°F) San Carlos de Bariloche8°C (46°F) Bucket list
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