Climate averages 1991–2020
Rio Claro weather
in January.
A hot, very wet month: the joint 3rd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Rio Claro: daytime highs average 28.0°C and nights cool to about 19.9°C. By daytime temperature it is the joint 3rd warmest of the 12 months.
Expect about 290 mm of rain on roughly 23 days, which makes January a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 20 min on an average January day.
The nearest other city in this atlas is Araras (19 km away). In January its highs average 28.1°C, about as warm as Rio Claro, with 285 mm of rain.
Among the 448 cities listed in Brazil, Rio Claro ranks joint 271st of 448 for the warmest January highs and joint 403rd of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; Rio Claro is 0.5°C cooler than that mean.
From January to February, average highs rise by 0.3°C to 28.3°C, and monthly rainfall falls from 290 mm to 214 mm.
The annual picture
January 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
Rio Claro climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 28.0°C19.9°C | 19.9°C | 290 | 23.2 | 13.313 h |
| February | 28.3°C19.9°C | 19.9°C | 214 | 19.5 | 12.913 h |
| March | 27.5°C19.1°C | 19.1°C | 173 | 18.4 | 12.212 h |
| April | 26.6°C17.2°C | 17.2°C | 68 | 8.3 | 11.612 h |
| May | 24.2°C14.2°C | 14.2°C | 57 | 6.4 | 11.111 h |
| June | 23.7°C12.9°C | 12.9°C | 39 | 4.4 | 10.811 h |
| July | 24.1°C12.3°C | 12.3°C | 35 | 3.9 | 10.911 h |
| August | 26.1°C13.3°C | 13.3°C | 32 | 4.2 | 11.311 h |
| September | 27.9°C15.7°C | 15.7°C | 72 | 7.9 | 11.912 h |
| October | 28.4°C17.5°C | 17.5°C | 128 | 13.9 | 12.613 h |
| November | 27.6°C18.1°C | 18.1°C | 184 | 16.5 | 13.213 h |
| December | 28.0°C19.4°C | 19.4°C | 229 | 21.3 | 13.513 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
January in nearby cities
- Araras in JanuaryBrazil · 19 kmHigh 28.1°C · Low 20.1°C · 285 mm rain
- Limeira in JanuaryBrazil · 24 kmHigh 28.4°C · Low 20.2°C · 290 mm rain
- Leme in JanuaryBrazil · 31 kmHigh 28.2°C · Low 20.1°C · 285 mm rain
- Piracicaba in JanuaryBrazil · 36 kmHigh 28.6°C · Low 20.4°C · 255 mm rain
- Santa Bárbara d'Oeste in JanuaryBrazil · 41 kmHigh 28.4°C · Low 20.2°C · 266 mm rain
- Americana in JanuaryBrazil · 43 kmHigh 28.4°C · Low 20.2°C · 270 mm rain
- Cosmópolis in JanuaryBrazil · 46 kmHigh 28.4°C · Low 20.2°C · 270 mm rain
- Pirassununga in JanuaryBrazil · 48 kmHigh 28.2°C · Low 20.1°C · 251 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 Rio Claro) is explained once on the Rio Claro year overview and on the Sources, method and limits page.
Limeira lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.