Washington climate

Washington Weather in May

NOAA 1991-2020 normals for Washington Is, 5.1 km from Washington

Average highs run from 54°F on May 1 to 65°F on May 31, and lows from 35°F to 45°F. Normal precipitation for the month is 2.97 in over about 11 wet days.

May day by day

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

Normal daily high and low temperature at Washington, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
59°F
Average low
40°F
Precipitation
2.97 in
Record high
87°FMay 28, 1969
Record low
20°FMay 8, 1950
Chance of a freeze
89%
Daylight
14 h 18 min to 15 h 25 min
Cloud cover
73%
Humidity
82%
Dew point
41°F
Wind
9.4 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
May 154°F35°F75°F 195222°F 197934%3%
May 254°F35°F78°F 198022°F 199034%2%
May 354°F36°F79°F 198023°F 198635%2%
May 455°F36°F77°F 194924°F 196735%2%
May 555°F36°F82°F 194924°F 198335%2%
May 656°F37°F77°F 198621°F 197635%2%
May 756°F37°F74°F 195725°F 198135%1%
May 856°F37°F79°F 195120°F 195035%1%
May 957°F38°F77°F 198721°F 198335%1%
May 1057°F38°F71°F 199322°F 198335%1%
May 1157°F38°F77°F 198727°F 198835%1%
May 1258°F39°F82°F 197725°F 197635%1%
May 1358°F39°F86°F 197724°F 195135%1%
May 1459°F39°F76°F 199124°F 195335%1%
May 1559°F40°F79°F 202224°F 198835%0%
May 1659°F40°F78°F 201228°F 195035%0%
May 1760°F40°F78°F 199828°F 198335%0%
May 1860°F41°F82°F 199632°F 195635%0%
May 1960°F41°F85°F 199826°F 198135%0%
May 2061°F41°F80°F 194829°F 201536%0%
May 2161°F42°F79°F 198026°F 196936%0%
May 2261°F42°F81°F 195627°F 196736%0%
May 2362°F42°F81°F 198027°F 196336%0%
May 2462°F43°F82°F 195130°F 195636%0%
May 2563°F43°F76°F 197228°F 194836%0%
May 2663°F43°F79°F 201028°F 196936%0%
May 2763°F44°F80°F 198629°F 198336%0%
May 2864°F44°F87°F 196927°F 194936%0%
May 2964°F44°F87°F 198629°F 194936%0%
May 3064°F45°F78°F 198627°F 197336%0%
May 3165°F45°F80°F 199530°F 198136%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Washington, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

May 1
sunrise 5:36 AM, sunset 7:54 PM
May 31
sunrise 5:03 AM, sunset 8:28 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00478905 (Washington Is), public domain. Records: NOAA GHCN-Daily, station USC00478905, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: 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.