Benton County climate

Benton County Weather in April

NOAA 1991-2020 normals for Prosser, 19.5 km from Benton County

Average highs run from 60°F on April 1 to 70°F on April 30, and lows from 38°F to 43°F. Normal precipitation for the month is 0.74 in over about 5 wet days.

April 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

April at a glance

Average high
65°F
Average low
40°F
Precipitation
0.74 in
Record high
92°FApr 25, 1977
Record low
23°FApr 3, 1972
Chance of a freeze
72%
Daylight
12 h 50 min to 14 h 20 min
Cloud cover
62%
Humidity
58%
Dew point
36°F
Wind
8.9 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation.

DateNormal highNormal lowRecord highRecord lowChance wet
Apr 160°F38°F78°F 198726°F 200818%
Apr 261°F38°F79°F 202425°F 194518%
Apr 361°F38°F78°F 199223°F 197218%
Apr 461°F38°F78°F 195125°F 195018%
Apr 561°F38°F83°F 196025°F 197518%
Apr 662°F38°F82°F 195228°F 199718%
Apr 762°F38°F84°F 197726°F 197318%
Apr 862°F39°F87°F 197726°F 197318%
Apr 962°F39°F83°F 198527°F 198818%
Apr 1063°F39°F83°F 198530°F 195418%
Apr 1163°F39°F84°F 194929°F 199718%
Apr 1263°F39°F81°F 194726°F 197018%
Apr 1364°F39°F88°F 194727°F 196818%
Apr 1464°F39°F86°F 194731°F 200118%
Apr 1564°F40°F86°F 196229°F 199917%
Apr 1665°F40°F84°F 198431°F 197017%
Apr 1765°F40°F86°F 194927°F 196417%
Apr 1865°F40°F88°F 194929°F 196417%
Apr 1966°F40°F90°F 195229°F 196617%
Apr 2066°F41°F86°F 201629°F 198217%
Apr 2166°F41°F88°F 195627°F 195117%
Apr 2267°F41°F89°F 195626°F 197217%
Apr 2367°F41°F89°F 195629°F 201117%
Apr 2467°F41°F87°F 197731°F 195017%
Apr 2568°F42°F92°F 197730°F 194917%
Apr 2668°F42°F89°F 197732°F 195017%
Apr 2768°F42°F92°F 194726°F 197017%
Apr 2869°F43°F89°F 198029°F 196718%
Apr 2969°F43°F87°F 195732°F 194718%
Apr 3070°F43°F92°F 195730°F 197218%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Benton County, in percent.051015201102030
  • Chance of a wet day

Sunrise and sunset

Times for 2026, local time (PDT).

April 1
sunrise 6:37 AM, sunset 7:27 PM
April 30
sunrise 5:46 AM, sunset 8:06 PM

Every day of April: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00456768 (Prosser), public domain. Records: NOAA GHCN-Daily, station USC00457015, 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.