Benton County climate

Benton County Weather in May

NOAA 1991-2020 normals for Corvallis Water Bureau, 2.9 km from Benton County

Average highs run from 66°F on May 1 to 71°F on May 31, and lows from 36°F to 41°F. Normal precipitation for the month is 2.80 in over about 14 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 Benton County, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
69°F
Average low
39°F
Precipitation
2.80 in
Record high
91°FMay 14, 2023
Record low
31°FMay 12, 2011
Chance of a freeze
82%
Daylight
14 h 14 min to 15 h 18 min
Cloud cover
67%
Humidity
85%
Dew point
47°F
Wind
5.1 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 166°F36°F84°F 201433°F 201153%
May 266°F36°F81°F 201632°F 201952%
May 366°F36°F86°F 202635°F 201951%
May 467°F36°F81°F 201733°F 202551%
May 567°F37°F83°F 201334°F 201250%
May 667°F37°F81°F 201933°F 201050%
May 767°F37°F82°F 201635°F 201449%
May 868°F37°F82°F 202033°F 202148%
May 968°F37°F84°F 201934°F 202248%
May 1068°F38°F83°F 201933°F 201247%
May 1168°F38°F82°F 201333°F 202247%
May 1269°F38°F81°F 202331°F 201146%
May 1369°F38°F89°F 202333°F 202246%
May 1469°F38°F91°F 202338°F 200746%
May 1569°F39°F84°F 202335°F 201745%0%
May 1669°F39°F91°F 200837°F 200745%0%
May 1769°F39°F91°F 200837°F 201245%0%
May 1870°F39°F82°F 200833°F 201245%0%
May 1970°F39°F82°F 200836°F 201244%0%
May 2070°F40°F80°F 202334°F 200944%0%
May 2170°F40°F82°F 202635°F 202144%0%
May 2270°F40°F86°F 201735°F 200743%0%
May 2370°F40°F84°F 201736°F 202043%0%
May 2470°F40°F80°F 202637°F 200943%0%
May 2571°F40°F80°F 202337°F 201342%0%
May 2671°F40°F81°F 202339°F 202142%0%
May 2771°F41°F84°F 201740°F 202542%0%
May 2871°F41°F86°F 202034°F 200741%0%
May 2971°F41°F85°F 200940°F 201241%0%
May 3071°F41°F85°F 200940°F 201841%0%
May 3171°F41°F86°F 202138°F 202640%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Benton County, in percent, and of at least 0.1 inch of snowfall.02040601102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

May 1
sunrise 6:04 AM, sunset 8:18 PM
May 31
sunrise 5:33 AM, sunset 8:51 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00351877 (Corvallis Water Bureau), public domain. Records: NOAA GHCN-Daily, station USW00004236, 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.