Climate averages 1991–2020
Olavarría weather
in September.
A mild, moderately wet month: the 8th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Olavarría: daytime highs average 16.8°C and nights cool to about 6.4°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 62 mm of rain on roughly 7 days, which makes September a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 50 min on an average September day.
The nearest other city in this atlas is Tandil (116 km away). In September its highs average 16.0°C, 0.9°C cooler than Olavarría, with 59 mm of rain.
Among the 67 cities listed in Argentina, Olavarría ranks 60th of 67 for the warmest September highs and 29th of 67 for the driest September (rainfall, lowest first). The mean September high of those 67 cities is 19.4°C; Olavarría is 2.6°C cooler than that mean.
From September to October, average highs rise by 2.9°C to 19.7°C, and monthly rainfall rises from 62 mm to 90 mm.
The annual picture
September 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
Olavarría climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.9°C16.4°C | 16.4°C | 92 | 9.3 | 14.414 h |
| February | 26.3°C15.7°C | 15.7°C | 76 | 7.8 | 13.513 h |
| March | 23.9°C13.9°C | 13.9°C | 81 | 8.0 | 12.312 h |
| April | 19.8°C10.5°C | 10.5°C | 85 | 7.8 | 11.211 h |
| May | 16.0°C7.7°C | 7.7°C | 47 | 5.7 | 10.210 h |
| June | 12.8°C4.7°C | 4.7°C | 37 | 4.6 | 9.710 h |
| July | 12.1°C3.6°C | 3.6°C | 38 | 5.2 | 9.910 h |
| August | 14.7°C4.9°C | 4.9°C | 54 | 5.0 | 10.711 h |
| September, selected | 16.8°C6.4°C | 6.4°C | 62 | 6.7 | 11.812 h |
| October | 19.7°C9.2°C | 9.2°C | 90 | 9.2 | 13.013 h |
| November | 23.2°C11.9°C | 11.9°C | 94 | 8.9 | 14.114 h |
| December | 26.6°C14.7°C | 14.7°C | 80 | 8.7 | 14.615 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
September in nearby cities
- Tandil in SeptemberArgentina · 116 kmHigh 16.0°C · Low 5.8°C · 59 mm rain
- Necochea in SeptemberArgentina · 231 kmHigh 14.3°C · Low 7.8°C · 56 mm rain
- Junín in SeptemberArgentina · 262 kmHigh 19.2°C · Low 8.9°C · 67 mm rain
- Bahía Blanca in SeptemberArgentina · 265 kmHigh 17.6°C · Low 8.0°C · 45 mm rain
- San Vicente in SeptemberArgentina · 269 kmHigh 18.0°C · Low 8.6°C · 72 mm rain
- Mar del Plata in SeptemberArgentina · 273 kmHigh 14.7°C · Low 7.5°C · 60 mm rain
- Ezeiza in SeptemberArgentina · 279 kmHigh 18.1°C · Low 9.0°C · 72 mm rain
- Luján in SeptemberArgentina · 281 kmHigh 18.8°C · Low 8.8°C · 71 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 Olavarría) is explained once on the Olavarría year overview and on the Sources, method and limits page.