São José weather in March
In March, São José has daytime highs averaging 27 °C, nights around 21 °C, with 19 wet days, and a sea temperature of 25 °C. Figures are 1991–2020 climate normals.
- 27.0°C Average high
- 21.2°C Average low
- 19days Wet days
- 146mm Rainfall
- 25.3°C Sea temperature
- 12h Daylight
Daily temperatures through March
How March develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 March | 27.7 °C | 21.8 °C | 69 % |
| 11–20 March | 27.1 °C | 21.4 °C | 59 % |
| 21–31 March | 26.3 °C | 20.4 °C | 58 % |
- Average highs fall from 27.7 °C early in March to 26.3 °C by the end of it.
- Rain is most likely over days 1–10 of March (69 % of days) and least likely over days 21–31 (58 %).
What to expect
| Measure | Typical March | Share of the month |
|---|---|---|
| Days above 25 °C | 24 of 31 | 77 % |
| Days above 30 °C | 3.8 of 31 | 12 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 19 of 31 | 62 % |
Conditions in March
| Measure | Average |
|---|---|
| Mean temperature | 24 °C |
| Record high (1991–2020) | 34 °C |
| Record low (1991–2020) | 13 °C |
| Relative humidity | 82 % |
| Wind speed | 12 km/h |
| Cloud cover | 68 % |
March compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 27.9 °C | 221 mm | 74 % |
| February | 27.9 °C | 215 mm | 72 % |
| March | 27.0 °C | 146 mm | 68 % |
| April | 25.3 °C | 93 mm | 62 % |
| May | 22.4 °C | 111 mm | 60 % |
See all twelve months for São José
- March is the 4th warmest month here.
- It is the 8th driest month of the year.
- It ranks 6th for least cloud cover.
- Days last about 12 hours from sunrise to sunset.
- It rains on 19 of 31 days — 62 % of the month.
- Nights are about 5.8 °C cooler than the middle of the day.
- The hottest March day on record since 1991 reached 34 °C, 7.1 °C above the usual daytime high.
- Beach score: 75 / 100 — see how this is calculated.
QuestionsMarch in São José, answered
How warm is São José in March?
Daily highs average 27 °C and nights fall to about 21 °C, a spread of 5.8 °C between afternoon and dawn. That makes March the 3rd warmest month of the year here.
Does it rain much in São José in March?
March averages 146 mm of rain, spread over about 19 of the 31 days — 62 % of the month. Cloud cover averages 68 % of the sky.
Is the sea warm enough to swim in March?
The sea averages 25 °C off São José in March. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.
How long are the days in March?
São José averages 12 hours between sunrise and sunset in March. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.