Mattawa climate

Mattawa Weather in April

NOAA 1991-2020 normals for Priest Rapids Dam, 10.2 km from Mattawa

Average highs run from 61°F on April 1 to 70°F on April 30, and lows from 42°F to 48°F. Normal precipitation for the month is 0.55 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 Mattawa, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

April at a glance

Average high
65°F
Average low
45°F
Precipitation
0.55 in
Record high
87°FApr 24, 2012
Record low
18°FApr 1, 2008
Chance of a freeze
27%
Daylight
12 h 50 min to 14 h 22 min
Cloud cover
62%
Humidity
58%
Dew point
34°F
Wind
8.1 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
Apr 161°F42°F73°F 201318°F 200820%0%
Apr 262°F42°F76°F 201319°F 200720%0%
Apr 362°F42°F76°F 200019°F 202020%0%
Apr 462°F42°F78°F 200018°F 200320%0%
Apr 562°F43°F75°F 200421°F 200320%0%
Apr 662°F43°F71°F 200420°F 200119%0%
Apr 763°F43°F76°F 202621°F 201119%0%
Apr 863°F43°F78°F 201623°F 200119%0%
Apr 963°F43°F81°F 201622°F 200819%0%
Apr 1064°F44°F81°F 201622°F 200818%0%
Apr 1164°F44°F79°F 200019°F 202118%0%
Apr 1264°F44°F79°F 200420°F 202118%0%
Apr 1364°F44°F79°F 200022°F 200518%0%
Apr 1465°F44°F77°F 200821°F 200117%0%
Apr 1565°F45°F81°F 202420°F 202217%0%
Apr 1665°F45°F74°F 202523°F 202217%0%
Apr 1766°F45°F78°F 199920°F 202216%0%
Apr 1866°F45°F80°F 199920°F 202216%0%
Apr 1966°F46°F81°F 201619°F 200816%0%
Apr 2067°F46°F82°F 201623°F 200815%0%
Apr 2167°F46°F84°F 201621°F 200815%0%
Apr 2267°F46°F84°F 200923°F 201115%0%
Apr 2368°F47°F81°F 201225°F 200215%0%
Apr 2468°F47°F87°F 201224°F 200215%0%
Apr 2569°F47°F84°F 199927°F 200315%0%
Apr 2669°F47°F83°F 200127°F 200815%0%
Apr 2769°F48°F84°F 200126°F 199915%0%
Apr 2870°F48°F85°F 201827°F 199915%0%
Apr 2970°F48°F83°F 200626°F 200015%0%
Apr 3070°F48°F84°F 202328°F 201315%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Mattawa, 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 (PDT).

April 1
sunrise 6:39 AM, sunset 7:29 PM
April 30
sunrise 5:46 AM, sunset 8:08 PM

Every day of April: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00456747 (Priest Rapids Dam), public domain. Records: NOAA GHCN-Daily, station USC00457522, 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.