Climate averages 1991–2020
Tandil weather
in December.
A warm, moderately wet month: the 2nd warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Tandil: daytime highs average 25.9°C and nights cool to about 13.7°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 76 mm of rain on roughly 9 days, which makes December a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 41 min on an average December day.
The nearest other city in this atlas is Olavarría (116 km away). In December its highs average 26.6°C, 0.8°C warmer than Tandil, with 80 mm of rain.
Among the 67 cities listed in Argentina, Tandil ranks 61st of 67 for the warmest December highs and joint 17th of 67 for the driest December (rainfall, lowest first). The mean December high of those 67 cities is 27.9°C; Tandil is 2.0°C cooler than that mean.
From December to January, average highs rise by 1.2°C to 27.1°C, and monthly rainfall rises from 76 mm to 81 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Tandil climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.1°C15.3°C | 15.3°C | 81 | 9.1 | 14.414 h |
| February | 25.7°C14.9°C | 14.9°C | 73 | 8.0 | 13.514 h |
| March | 23.3°C13.2°C | 13.2°C | 74 | 8.0 | 12.312 h |
| April | 19.2°C10.1°C | 10.1°C | 81 | 7.6 | 11.211 h |
| May | 15.5°C7.4°C | 7.4°C | 42 | 5.6 | 10.210 h |
| June | 12.4°C4.6°C | 4.6°C | 41 | 4.8 | 9.610 h |
| July | 11.6°C3.5°C | 3.5°C | 40 | 5.3 | 9.910 h |
| August | 14.1°C4.6°C | 4.6°C | 51 | 5.5 | 10.711 h |
| September | 16.0°C5.8°C | 5.8°C | 59 | 7.0 | 11.812 h |
| October | 18.9°C8.4°C | 8.4°C | 85 | 9.5 | 13.013 h |
| November | 22.4°C10.9°C | 10.9°C | 90 | 9.5 | 14.114 h |
| December, selected | 25.9°C13.7°C | 13.7°C | 76 | 8.6 | 14.715 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Olavarría in DecemberArgentina · 116 kmHigh 26.6°C · Low 14.7°C · 80 mm rain
- Necochea in DecemberArgentina · 141 kmHigh 23.0°C · Low 15.0°C · 65 mm rain
- Mar del Plata in DecemberArgentina · 158 kmHigh 23.7°C · Low 14.9°C · 69 mm rain
- Mar del Tuyú in DecemberArgentina · 233 kmHigh 22.0°C · Low 17.5°C · 65 mm rain
- San Vicente in DecemberArgentina · 264 kmHigh 27.4°C · Low 16.8°C · 86 mm rain
- Ezeiza in DecemberArgentina · 281 kmHigh 27.5°C · Low 17.2°C · 85 mm rain
- La Plata in DecemberArgentina · 288 kmHigh 26.1°C · Low 18.1°C · 82 mm rain
- Laferrere in DecemberArgentina · 291 kmHigh 27.6°C · Low 17.4°C · 85 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Tandil) is explained once on the Tandil year overview and on the Sources, method and limits page.