Heshan Weather in May

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

Average highs run from 26°C on May 1 to 29°C on May 31, and lows from 16°C to 20°C. Normal precipitation for the month is 189 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: 28°C
Average low: 18°C
Precipitation: 189 mm
Reanalysis high: 35°CMay 25, 2018
Reanalysis low: 7°CMay 2, 1991
Daylight: 13 h 16 min to 13 h 49 min
Cloud cover: 77%
Humidity: 79%
Dew point: 19°C
Wind: 12.2 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	26°C	16°C	33°C 1994	10°C 1991	55%
May 2	26°C	16°C	34°C 1997	7°C 1991	54%
May 3	27°C	16°C	34°C 2020	10°C 2004	53%
May 4	27°C	17°C	32°C 1997	9°C 2004	53%
May 5	27°C	17°C	31°C 2006	10°C 2004	53%
May 6	27°C	17°C	32°C 2018	12°C 2004	53%
May 7	27°C	17°C	33°C 2012	11°C 2002	54%
May 8	27°C	17°C	33°C 2007	10°C 1991	53%
May 9	27°C	17°C	33°C 2004	12°C 1991	53%
May 10	27°C	17°C	34°C 2011	12°C 1996	52%
May 11	27°C	17°C	33°C 2009	11°C 1998	52%
May 12	27°C	17°C	33°C 1994	12°C 2015	52%
May 13	27°C	17°C	33°C 2000	12°C 2006	51%
May 14	27°C	17°C	34°C 2000	13°C 2006	51%
May 15	27°C	17°C	34°C 1994	14°C 2016	50%
May 16	28°C	17°C	34°C 2018	12°C 2016	49%
May 17	28°C	18°C	34°C 2018	13°C 2016	48%
May 18	28°C	18°C	34°C 2011	15°C 2006	50%
May 19	28°C	18°C	34°C 2011	15°C 2006	50%
May 20	28°C	18°C	34°C 2011	14°C 2010	50%
May 21	28°C	18°C	33°C 2018	14°C 1995	50%
May 22	28°C	18°C	33°C 1996	11°C 2011	50%
May 23	28°C	19°C	35°C 2007	10°C 2011	50%
May 24	28°C	19°C	34°C 1991	13°C 2011	50%
May 25	29°C	19°C	35°C 2018	12°C 1998	51%
May 26	29°C	19°C	34°C 1997	14°C 1998	51%
May 27	29°C	19°C	33°C 2007	14°C 1999	51%
May 28	29°C	19°C	34°C 2013	14°C 1993	52%
May 29	29°C	20°C	34°C 1994	12°C 1993	52%
May 30	29°C	20°C	34°C 2007	15°C 2001	51%
May 31	29°C	20°C	34°C 1997	16°C 2008	52%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT+8).

May 1: sunrise 5:50 AM, sunset 7:06 PM
May 31: sunrise 5:34 AM, sunset 7:23 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.