Climate averages 1991–2020

Uruguaiana weather
in January.

A hot, wet month: the warmest and the 10th driest of the year.

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

Average high 30.6°C Daytime mean, January

Average low 21.6°C Night-time mean, January

Rainfall 139 mm 10 days with ≥1 mm

Daylight 14 h Sunrise to sunset, per day

January is a hot month in Uruguaiana: daytime highs average 30.6°C and nights cool to about 21.6°C. By daytime temperature it is the warmest month of the year.

Expect about 139 mm of rain on roughly 10 days, which makes January a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 49 min on an average January day.

The nearest other city in this atlas is Alegrete (125 km away). In January its highs average 30.3°C, about as warm as Uruguaiana, with 143 mm of rain.

Among the 448 cities listed in Brazil, Uruguaiana ranks joint 47th of 448 for the warmest January highs and joint 106th of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; Uruguaiana is 2.2°C warmer than that mean.

From January to February, average highs fall by 1.0°C to 29.6°C, and monthly rainfall falls from 139 mm to 128 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

Uruguaiana climate table

1991–2020

Monthly climate averages for Uruguaiana, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	30.6°C21.6°C	21.6°C	139	10.4	13.814 h
February	29.6°C21.0°C	21.0°C	128	10.4	13.113 h
March	28.0°C19.3°C	19.3°C	124	9.2	12.312 h
April	24.6°C16.3°C	16.3°C	177	9.3	11.411 h
May	20.7°C13.1°C	13.1°C	115	8.0	10.611 h
June	18.4°C10.9°C	10.9°C	113	8.5	10.310 h
July	17.8°C9.7°C	9.7°C	103	7.5	10.410 h
August	20.4°C11.1°C	11.1°C	89	7.8	11.111 h
September	22.0°C12.6°C	12.6°C	126	9.0	11.912 h
October	24.6°C15.4°C	15.4°C	189	10.9	12.813 h
November	27.3°C17.4°C	17.4°C	136	8.4	13.614 h
December	29.8°C20.1°C	20.1°C	136	9.4	14.014 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 Uruguaiana

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