Belém de São Francisco Weather in May

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

Average highs run from 33°C on May 1 to 32°C on May 31, and lows from 21°C to 20°C. Normal precipitation for the month is 40 mm over about 9 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: 33°C
Average low: 21°C
Precipitation: 40 mm
Reanalysis high: 39°CMay 2, 1998
Reanalysis low: 17°CMay 27, 2014
Daylight: 11 h 48 min to 11 h 39 min
Cloud cover: 54%
Humidity: 68%
Dew point: 19°C
Wind: 18.4 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	33°C	21°C	39°C 1998	19°C 2000	28%
May 2	33°C	21°C	39°C 1998	18°C 1996	28%
May 3	33°C	21°C	38°C 1998	19°C 2004	29%
May 4	33°C	21°C	36°C 1998	18°C 2004	29%
May 5	33°C	21°C	37°C 1998	19°C 2016	29%
May 6	33°C	21°C	36°C 1998	17°C 2019	29%
May 7	33°C	21°C	37°C 2001	19°C 2011	29%
May 8	33°C	21°C	38°C 2001	19°C 2007	28%
May 9	33°C	21°C	36°C 1991	18°C 2012	27%
May 10	33°C	21°C	35°C 2001	19°C 2020	27%
May 11	33°C	21°C	36°C 2019	19°C 1997	26%
May 12	33°C	21°C	37°C 2001	17°C 1997	26%
May 13	33°C	21°C	37°C 2001	19°C 2002	24%
May 14	33°C	21°C	36°C 2001	18°C 2002	25%
May 15	33°C	21°C	37°C 1993	18°C 2000	27%
May 16	33°C	21°C	37°C 2017	18°C 1992	28%
May 17	33°C	21°C	37°C 2017	19°C 1992	29%
May 18	33°C	21°C	36°C 2001	18°C 1994	29%
May 19	33°C	21°C	37°C 2001	17°C 1994	29%
May 20	33°C	21°C	35°C 2018	18°C 2016	29%
May 21	33°C	21°C	35°C 2015	18°C 2007	28%
May 22	33°C	21°C	35°C 2010	17°C 1997	29%
May 23	32°C	21°C	35°C 2016	18°C 1996	29%
May 24	32°C	21°C	35°C 2013	18°C 2018	28%
May 25	32°C	21°C	36°C 2003	19°C 2000	28%
May 26	32°C	20°C	37°C 2003	18°C 2014	28%
May 27	32°C	20°C	36°C 2003	17°C 2014	28%
May 28	32°C	20°C	36°C 1998	18°C 2000	29%
May 29	32°C	20°C	35°C 2001	18°C 1999	28%
May 30	32°C	20°C	35°C 2001	17°C 1999	27%
May 31	32°C	20°C	35°C 2010	18°C 2006	26%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

May 1: sunrise 5:39 AM, sunset 5:27 PM
May 31: sunrise 5:44 AM, sunset 5:23 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.