Climate averages 1991–2020
Necochea weather
by month.
See how the year changes. January has the highest average daily maximum; July has the lowest average monthly rainfall.
Pleasant-weather months by our simple rule: FebruaryDecember
Long-term climate patterns, not a forecast for a particular trip.
Across the year Necochea averages a daytime high of 18.1°C and a nighttime low of 11.6°C, with about 792 mm of rain on roughly 98 days. January is the warmest month (average high 24.7°C) and July the coolest (11.7°C). November is the wettest month with 83 mm; July is the driest with 52 mm.
Months with pleasant weather by a simple rule (average high between 18°C and 29°C, average low of at least 5°C and at most 8 rain days): February and December. This looks at temperature and rain only, not humidity, wind, sea temperature or crowds.
The annual picture
A year in Necochea
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
Necochea climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.7°C16.8°C | 16.8°C | 75 | 9.3 | 14.515 h |
| February | 23.9°C16.9°C | 16.9°C | 74 | 8.0 | 13.614 h |
| March | 22.3°C15.8°C | 15.8°C | 73 | 8.2 | 12.412 h |
| April | 18.9°C12.9°C | 12.9°C | 77 | 8.8 | 11.111 h |
| May | 15.6°C10.5°C | 10.5°C | 53 | 7.4 | 10.110 h |
| June | 12.8°C7.9°C | 7.9°C | 54 | 7.6 | 9.510 h |
| July | 11.7°C6.5°C | 6.5°C | 52 | 7.7 | 9.710 h |
| August | 13.1°C7.0°C | 7.0°C | 57 | 7.2 | 10.611 h |
| September | 14.3°C7.8°C | 7.8°C | 56 | 7.9 | 11.812 h |
| October | 16.7°C9.9°C | 9.9°C | 73 | 8.6 | 13.113 h |
| November | 19.8°C12.3°C | 12.3°C | 83 | 9.7 | 14.214 h |
| December | 23.0°C15.0°C | 15.0°C | 65 | 8.0 | 14.815 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
Nearby cities
- Mar del PlataArgentina · 120 kmHigh 18.4°C · Low 11.3°C · 811 mm rain a year
- TandilArgentina · 141 kmHigh 19.3°C · Low 9.4°C · 793 mm rain a year
- OlavarríaArgentina · 231 kmHigh 20.0°C · Low 10.0°C · 836 mm rain a year
- Mar del TuyúArgentina · 285 kmHigh 17.6°C · Low 13.6°C · 914 mm rain a year
- Bahía BlancaArgentina · 307 kmHigh 21.0°C · Low 11.8°C · 604 mm rain a year
- San VicenteArgentina · 393 kmHigh 21.3°C · Low 12.1°C · 948 mm rain a year
- La PlataArgentina · 410 kmHigh 20.4°C · Low 13.6°C · 952 mm rain a year
- EzeizaArgentina · 412 kmHigh 21.4°C · Low 12.5°C · 958 mm rain a year
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 limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC-3, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at -38.60°, -58.70° (6 km from the city centre), adjusted down by 0.1°C for the difference between the city's elevation (19 m) and the cell's (5 m). Rain comes from the 0.25° cell at -38.50°, -58.75°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.