Climate averages 1991–2020

Vilhena weather
in January.

A warm, very wet month: the joint 9th warmest and the 11th driest of the year.

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

Average high 27.5°C Daytime mean, January

Average low 21.0°C Night-time mean, January

Rainfall 267 mm 29 days with ≥1 mm

Daylight 13 h Sunrise to sunset, per day

January is a warm month in Vilhena: daytime highs average 27.5°C and nights cool to about 21.0°C. By daytime temperature it is the joint 9th warmest of the 12 months.

Expect about 267 mm of rain on roughly 29 days, which makes January a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 47 min on an average January day.

The nearest other city in this atlas is Cacoal (202 km away). In January its highs average 29.1°C, 1.7°C warmer than Vilhena, with 308 mm of rain.

Among the 448 cities listed in Brazil, Vilhena ranks joint 303rd of 448 for the warmest January highs and joint 348th of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; Vilhena is 1.0°C cooler than that mean.

From January to February, average highs fall by 0.3°C to 27.2°C, and monthly rainfall rises from 267 mm to 276 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

Vilhena climate table

1991–2020

Monthly climate averages for Vilhena, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	27.5°C21.0°C	21.0°C	267	29.4	12.813 h
February	27.2°C20.8°C	20.8°C	276	27.2	12.513 h
March	27.5°C20.9°C	20.9°C	241	28.6	12.212 h
April	27.6°C20.4°C	20.4°C	128	21.4	11.812 h
May	27.5°C19.4°C	19.4°C	57	12.1	11.512 h
June	28.3°C18.5°C	18.5°C	14	3.0	11.411 h
July	29.3°C18.2°C	18.2°C	10	2.1	11.411 h
August	31.0°C19.6°C	19.6°C	24	4.8	11.712 h
September	30.8°C20.9°C	20.9°C	84	13.5	12.012 h
October	29.5°C21.2°C	21.2°C	165	22.4	12.412 h
November	28.2°C21.1°C	21.1°C	207	25.5	12.713 h
December	27.7°C21.1°C	21.1°C	259	28.2	12.913 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 Vilhena

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 Vilhena) is explained once on the Vilhena year overview and on the Sources, method and limits page.