Monthly climate guide
La Rioja weather in December
With highs near 34°C (92°F) and lows around 20°C (68°F), December feels very hot in La Rioja. Rainfall averages about 67 mm (some rain) and the sky is a mix of sun and cloud. Daytime highs are 2°C warmer than November and about the same as January.
What stands out in December
- Just 150 km apart, but La Rioja runs about 2°C warmer than Catamarca this month.
- Rain is above La Rioja's usual level, by about 81%.
- Seasonally, December counts as early summer in La Rioja — the seasons are reversed south of the equator.
- Afternoons and nights feel like different seasons, roughly 14°C apart.
Avg high
34°C
92°F
Avg low
20°C
68°F
Rainfall
67 mm
some rain
Humidity
46%
relative
Sky
41%
cloud · a mix of sun and cloud
La Rioja weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 34°C / 92°F | 21°C / 69°F | 97 mm | 51% | 48% |
| February | 32°C / 89°F | 20°C / 67°F | 87 mm | 59% | 50% |
| March | 29°C / 85°F | 17°C / 63°F | 65 mm | 62% | 43% |
| April | 26°C / 79°F | 14°C / 58°F | 33 mm | 63% | 45% |
| May | 22°C / 72°F | 11°C / 51°F | 5 mm | 63% | 49% |
| June | 19°C / 66°F | 7°C / 44°F | 5 mm | 57% | 41% |
| July | 18°C / 65°F | 6°C / 42°F | 3 mm | 55% | 38% |
| August | 22°C / 72°F | 8°C / 46°F | 4 mm | 43% | 29% |
| September | 26°C / 78°F | 11°C / 51°F | 18 mm | 42% | 30% |
| October | 29°C / 84°F | 14°C / 58°F | 19 mm | 43% | 39% |
| November | 32°C / 89°F | 18°C / 64°F | 40 mm | 44% | 41% |
| December | 34°C / 92°F | 20°C / 68°F | 67 mm | 46% | 41% |
What to pack for December
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- An extra layer — evenings are noticeably cooler than afternoons
- A small travel umbrella, just in case
Is December a good time to visit La Rioja?
Compare the months in the chart above to find your ideal window.
Best time to visit La Rioja →Other Argentina cities in December
Cite or embed this data
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La Rioja weather in December. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/argentina/la-rioja/december
<a href="https://weathercompare.eu/weather/argentina/la-rioja/december">La Rioja weather in December</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/argentina/la-rioja" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="La Rioja weather in December"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/argentina/la-rioja/december">La Rioja weather in December</a> – WeatherCompare</p>
La Rioja in December: quick answers
Is December a good time to visit La Rioja?
It can be, if you like heat: December highs in La Rioja are around 34°C. Good for the beach; plan sightseeing for early morning and evening.
How warm is La Rioja in December?
Average highs are about 34°C (92°F) and average lows about 20°C (68°F), based on 10 years of daily data.
Does it rain a lot in La Rioja in December?
La Rioja typically gets around 67 mm of rain in December — some rain.
Figures are long-term averages for the area around La Rioja (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.