Climate averages 1991–2020

Guaratinguetá weather
in January.

A warm, very wet month: the 2nd warmest and the wettest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 27.7°C Daytime mean, January

Average low 19.6°C Night-time mean, January

Rainfall 296 mm 24 days with ≥1 mm

Daylight 13 h Sunrise to sunset, per day

January is a warm month in Guaratinguetá: daytime highs average 27.7°C and nights cool to about 19.6°C. By daytime temperature it is the 2nd warmest of the 12 months.

Expect about 296 mm of rain on roughly 24 days, which makes January a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 22 min on an average January day.

The nearest other city in this atlas is Lorena (12 km away). In January its highs average 27.7°C, about as warm as Guaratinguetá, with 217 mm of rain.

Among the 448 cities listed in Brazil, Guaratinguetá ranks joint 293rd of 448 for the warmest January highs and joint 412th of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; Guaratinguetá is 0.7°C cooler than that mean.

From January to February, average highs rise by 0.4°C to 28.1°C, and monthly rainfall falls from 296 mm to 212 mm.

The annual picture

January in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Guaratinguetá climate table

1991–2020

Monthly climate averages for Guaratinguetá, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	27.7°C19.6°C	19.6°C	296	24.0	13.413 h
February	28.1°C19.7°C	19.7°C	212	19.6	12.913 h
March	27.0°C19.0°C	19.0°C	196	20.5	12.212 h
April	25.8°C17.6°C	17.6°C	79	11.3	11.612 h
May	23.3°C14.9°C	14.9°C	55	8.2	11.011 h
June	22.9°C13.6°C	13.6°C	33	5.8	10.811 h
July	22.9°C13.1°C	13.1°C	35	5.2	10.911 h
August	24.5°C13.9°C	13.9°C	37	5.7	11.311 h
September	25.9°C15.6°C	15.6°C	91	10.6	11.912 h
October	26.8°C17.2°C	17.2°C	144	16.4	12.613 h
November	26.4°C17.8°C	17.8°C	207	19.5	13.213 h
December	27.4°C19.1°C	19.1°C	254	22.9	13.514 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

Distance from Guaratinguetá

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 limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Guaratinguetá) is explained once on the Guaratinguetá year overview and on the Sources, method and limits page.