Iaçu Weather in May

NASA POWER reanalysis for the half-degree grid cell around Iaçu, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

Average highs run from 30°C on May 1 to 28°C on May 31, and lows from 19°C to 18°C. Normal precipitation for the month is 78 mm over about 16 wet days.

May day by day

The normal high and low for each date, in °C.

Normal low
Normal high
Reanalysis extreme high
Reanalysis extreme low

May at a glance

Average high: 29°C
Average low: 19°C
Precipitation: 78 mm
Reanalysis high: 35°CMay 16, 2017
Reanalysis low: 14°CMay 20, 2006
Daylight: 11 h 39 min to 11 h 25 min
Cloud cover: 55%
Humidity: 80%
Dew point: 18°C
Wind: 13.3 km/h

Every day of the month

A wet day has at least 1 mm of precipitation in the reanalysis.

Date	Normal high	Normal low	Reanalysis high	Reanalysis low	Chance wet
May 1	30°C	19°C	34°C 1998	17°C 2014	58%
May 2	30°C	19°C	34°C 2003	17°C 2002	56%
May 3	30°C	19°C	33°C 2003	18°C 2005	55%
May 4	29°C	19°C	34°C 2002	17°C 2010	54%
May 5	29°C	19°C	33°C 1998	17°C 2008	54%
May 6	29°C	19°C	34°C 2008	17°C 2005	52%
May 7	29°C	19°C	33°C 2003	16°C 1996	52%
May 8	29°C	19°C	33°C 2013	16°C 1996	53%
May 9	29°C	19°C	33°C 1991	16°C 1996	53%
May 10	29°C	19°C	32°C 1995	17°C 2016	53%
May 11	29°C	19°C	32°C 2012	16°C 1993	53%
May 12	29°C	19°C	33°C 2012	17°C 2007	52%
May 13	29°C	19°C	33°C 2012	14°C 2014	51%
May 14	29°C	19°C	32°C 2012	16°C 2000	51%
May 15	29°C	19°C	33°C 2017	16°C 2000	52%
May 16	29°C	18°C	35°C 2017	15°C 2000	52%
May 17	29°C	18°C	33°C 1996	16°C 1997	52%
May 18	29°C	18°C	32°C 1992	16°C 2006	52%
May 19	29°C	18°C	33°C 1992	15°C 2006	53%
May 20	29°C	18°C	32°C 1992	14°C 2006	52%
May 21	29°C	18°C	32°C 2002	16°C 2006	53%
May 22	29°C	18°C	31°C 2002	15°C 2006	53%
May 23	29°C	18°C	32°C 2005	15°C 1992	52%
May 24	29°C	18°C	33°C 2007	15°C 1993	52%
May 25	29°C	18°C	33°C 2019	16°C 2009	51%
May 26	29°C	18°C	32°C 2019	16°C 1996	51%
May 27	29°C	18°C	32°C 1993	15°C 2002	51%
May 28	28°C	18°C	32°C 1998	15°C 2002	52%
May 29	28°C	18°C	32°C 2007	16°C 2017	52%
May 30	28°C	18°C	32°C 2007	15°C 2020	52%
May 31	28°C	18°C	33°C 1998	14°C 2020	53%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT-3).

May 1: sunrise 5:48 AM, sunset 5:27 PM
May 31: sunrise 5:56 AM, sunset 5:21 PM

Every day of May: sun and moon

Other months

Sources

Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.