Isiolo Weather in May

NASA POWER reanalysis for the half-degree grid cell around Isiolo, 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 31°C on May 31, and lows from 18°C to 17°C. Normal precipitation for the month is 65 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: 30°C
Average low: 18°C
Precipitation: 65 mm
Reanalysis high: 34°CMay 24, 2000
Reanalysis low: 14°CMay 20, 1997
Daylight: 12 h 08 min to 12 h 09 min
Cloud cover: 45%
Humidity: 63%
Dew point: 15°C
Wind: 16.6 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	18°C	34°C 2000	17°C 2018	74%
May 2	30°C	18°C	33°C 2011	16°C 1999	73%
May 3	30°C	18°C	34°C 2019	16°C 2015	73%
May 4	30°C	18°C	34°C 2014	17°C 2018	72%
May 5	30°C	18°C	33°C 2014	16°C 1994	70%
May 6	30°C	18°C	33°C 2019	16°C 1997	70%
May 7	30°C	18°C	33°C 2019	16°C 1997	67%
May 8	30°C	18°C	34°C 2019	15°C 1997	64%
May 9	30°C	18°C	32°C 2010	16°C 1997	61%
May 10	30°C	18°C	33°C 2005	16°C 1997	58%
May 11	30°C	18°C	33°C 2005	16°C 1997	55%
May 12	30°C	18°C	33°C 2014	16°C 1997	52%
May 13	30°C	18°C	33°C 2001	16°C 1997	50%
May 14	30°C	18°C	33°C 2007	17°C 1997	48%
May 15	30°C	18°C	32°C 2001	16°C 2002	46%
May 16	30°C	18°C	32°C 2014	16°C 2013	44%
May 17	30°C	18°C	33°C 2014	16°C 2020	42%
May 18	30°C	18°C	33°C 2009	15°C 2020	39%
May 19	31°C	18°C	33°C 2009	14°C 1997	38%
May 20	31°C	18°C	33°C 2005	14°C 1997	37%
May 21	31°C	18°C	33°C 2000	15°C 1997	35%
May 22	31°C	17°C	33°C 2000	15°C 2004	34%
May 23	31°C	17°C	34°C 2000	16°C 2004	34%
May 24	31°C	17°C	34°C 2000	16°C 2006	32%
May 25	31°C	17°C	34°C 2000	16°C 2004	32%
May 26	31°C	17°C	33°C 2000	16°C 2004	32%
May 27	31°C	17°C	33°C 2000	15°C 1992	31%
May 28	31°C	17°C	33°C 2000	16°C 2018	30%
May 29	31°C	17°C	33°C 2000	15°C 2018	30%
May 30	31°C	17°C	33°C 2011	15°C 2018	30%
May 31	31°C	17°C	33°C 2019	15°C 2016	31%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

May 1: sunrise 6:23 AM, sunset 6:31 PM
May 31: sunrise 6:23 AM, sunset 6:32 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.