Oyama climate

Oyama Weather in May

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

Average highs run from 18°C on May 1 to 22°C on May 31, and lows from 7°C to 11°C. Normal precipitation for the month is 136 mm over about 12 wet days.

May day by day

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

Normal daily high and low temperature at Oyama, in °C, with the record for each date.5101520253035151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
20°C
Average low
9°C
Precipitation
136 mm
Record high
31°CMay 29, 2026
Record low
11°CMay 1, 2026
Daylight
13 h 37 min to 14 h 22 min
Cloud cover
70%
Humidity
78%
Dew point
10°C
Wind
8.6 km/h

Every day of the month

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

DateNormal highNormal lowRecord highRecord lowChance wet
May 118°C7°C22°C 202511°C 202634%
May 218°C7°C26°C 202612°C 202533%
May 319°C7°C24°C 202612°C 202534%
May 419°C7°C28°C 202611°C 202535%
May 519°C7°C23°C 202613°C 202635%
May 619°C8°C22°C 202613°C 202536%
May 719°C8°C24°C 202613°C 202537%
May 819°C8°C25°C 202614°C 202538%
May 919°C8°C24°C 202612°C 202640%
May 1019°C8°C24°C 202513°C 202640%
May 1120°C8°C25°C 202515°C 202540%
May 1220°C9°C24°C 202614°C 202641%
May 1320°C9°C26°C 202615°C 202542%
May 1420°C9°C26°C 202613°C 202642%
May 1520°C9°C25°C 202514°C 202643%
May 1620°C9°C26°C 202615°C 202642%
May 1720°C9°C30°C 202617°C 202642%
May 1820°C9°C27°C 202517°C 202642%
May 1921°C10°C27°C 202616°C 202542%
May 2021°C10°C30°C 202520°C 202543%
May 2121°C10°C29°C 202521°C 202542%
May 2221°C10°C27°C 202512°C 202642%
May 2321°C10°C23°C 202514°C 202642%
May 2421°C10°C23°C 202615°C 202542%
May 2521°C11°C27°C 202616°C 202541%
May 2621°C11°C27°C 202616°C 202540%
May 2721°C11°C27°C 202615°C 202539%
May 2822°C11°C27°C 202616°C 202538%
May 2922°C11°C31°C 202614°C 202537%
May 3022°C11°C27°C 202614°C 202538%
May 3122°C11°C30°C 202615°C 202539%

Chance of rain

The chance of at least 1 mm of precipitation in the reanalysis on each date at Oyama, in percent.010203040501102030
  • Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT+9).

May 1
sunrise 4:53 AM, sunset 6:30 PM
May 31
sunrise 4:31 AM, sunset 6:53 PM

Every day of May: sun and moon

Other months

Sources

Records: NOAA GHCN-Daily, station JAW00043325, every year on file, quality-flagged values removed. 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.