Portland climate

Portland Weather in May

NOAA 1991-2020 normals for Corpus Christi NWS, 20.9 km from Portland

Average highs run from 83°F on May 1 to 88°F on May 31, and lows from 67°F to 74°F. Normal precipitation for the month is 3.25 in over about 6 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 Portland, in °F, with the record for each date.5060708090100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
86°F
Average low
71°F
Precipitation
3.25 in
Record high
99°FMay 21, 2017
Record low
53°FMay 3, 2013
Chance of a freeze
0%
Days of 90°F or more
6.4
Daylight
13 h 15 min to 13 h 47 min
Cloud cover
58%
Humidity
74%
Dew point
69°F
Wind
11.6 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 183°F67°F85°F 200359°F 200420%0%
May 283°F67°F86°F 200655°F 201320%0%
May 384°F67°F88°F 200753°F 201320%0%
May 484°F67°F88°F 200259°F 201320%0%
May 584°F68°F91°F 199958°F 199020%0%
May 684°F68°F89°F 202360°F 199020%0%
May 784°F68°F86°F 200364°F 201320%0%
May 884°F69°F86°F 200665°F 200421%0%
May 985°F69°F95°F 199867°F 199721%0%
May 1085°F69°F88°F 200264°F 199721%0%
May 1185°F69°F88°F 200965°F 198721%0%
May 1285°F70°F90°F 201765°F 199921%0%
May 1385°F70°F88°F 200765°F 199721%0%
May 1485°F70°F88°F 200960°F 201721%0%
May 1586°F71°F89°F 202365°F 201421%0%
May 1686°F71°F90°F 200766°F 200621%0%
May 1786°F71°F87°F 200367°F 199121%0%
May 1886°F71°F90°F 200866°F 200221%0%
May 1986°F72°F87°F 200063°F 198621%0%
May 2086°F72°F89°F 200364°F 198621%0%
May 2187°F72°F99°F 201764°F 198621%0%
May 2287°F72°F88°F 198867°F 198821%0%
May 2387°F73°F88°F 200867°F 200121%0%
May 2487°F73°F92°F 200963°F 201721%0%
May 2587°F73°F89°F 200868°F 200721%0%
May 2687°F73°F88°F 199970°F 199321%0%
May 2788°F73°F89°F 198971°F 198621%0%
May 2888°F74°F91°F 201070°F 199921%0%
May 2988°F74°F90°F 201064°F 199221%0%
May 3088°F74°F90°F 201466°F 199221%0%
May 3188°F74°F89°F 199071°F 201521%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Portland, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

May 1
sunrise 6:49 AM, sunset 8:04 PM
May 31
sunrise 6:34 AM, sunset 8:21 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00412011 (Corpus Christi NWS), public domain. Records: NOAA GHCN-Daily, station USC00417170, 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.