Grangwav Weather in May

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

Average highs run from 31°C on May 1 to 31°C on May 31, and lows from 25°C to 26°C. Normal precipitation for the month is 62 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: 31°C
Average low: 26°C
Precipitation: 62 mm
Reanalysis high: 34°CMay 31, 2004
Reanalysis low: 23°CMay 1, 2006
Daylight: 12 h 49 min to 13 h 10 min
Cloud cover: 65%
Humidity: 70%
Dew point: 22°C
Wind: 9.7 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	31°C	25°C	33°C 2010	23°C 2006	24%
May 2	31°C	25°C	33°C 2010	23°C 2006	23%
May 3	31°C	25°C	33°C 1994	23°C 1992	23%
May 4	31°C	25°C	33°C 2010	24°C 2006	23%
May 5	31°C	26°C	32°C 2010	23°C 2006	23%
May 6	31°C	26°C	33°C 2015	24°C 1993	24%
May 7	31°C	26°C	33°C 2015	23°C 2001	25%
May 8	31°C	26°C	33°C 2015	24°C 2016	26%
May 9	31°C	26°C	33°C 2015	25°C 2014	27%
May 10	31°C	26°C	34°C 1998	24°C 1993	28%
May 11	31°C	26°C	33°C 1998	24°C 1993	28%
May 12	31°C	26°C	33°C 2003	24°C 2013	29%
May 13	31°C	26°C	33°C 1998	23°C 2011	29%
May 14	31°C	26°C	33°C 2010	24°C 2011	30%
May 15	31°C	26°C	33°C 2003	24°C 2017	30%
May 16	31°C	26°C	33°C 2010	24°C 2011	31%
May 17	31°C	26°C	33°C 2003	24°C 2011	31%
May 18	31°C	26°C	33°C 1997	25°C 1993	32%
May 19	31°C	26°C	33°C 1997	25°C 2000	33%
May 20	31°C	26°C	33°C 1997	24°C 2000	33%
May 21	31°C	26°C	32°C 1997	24°C 2000	33%
May 22	31°C	26°C	32°C 1998	25°C 1992	34%
May 23	31°C	26°C	33°C 1997	24°C 1992	35%
May 24	31°C	26°C	33°C 2020	24°C 1992	35%
May 25	31°C	26°C	33°C 2020	24°C 1992	35%
May 26	31°C	26°C	33°C 1998	25°C 1991	35%
May 27	31°C	26°C	33°C 1998	25°C 2002	34%
May 28	31°C	26°C	32°C 2003	25°C 2002	35%
May 29	31°C	26°C	32°C 2004	25°C 2002	33%
May 30	31°C	26°C	33°C 2004	25°C 2008	32%
May 31	31°C	26°C	34°C 2004	25°C 2011	31%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (EDT).

May 1: sunrise 6:24 AM, sunset 7:13 PM
May 31: sunrise 6:14 AM, sunset 7:24 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.