Wallula weather by month
What a typical year looks like in Wallula, Washington: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at KENNEWICK, 21 km from Wallula; records cover 1894–2026.
The year at a glance
- Precipitation a year
- 7.9 in200 mm
- Snow a year
- Rare
- Last spring freeze
- Mar 26
- First fall freeze
- Oct 30
- Heating degree days
- 4,619
- Cooling degree days
- 1,020
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 13°−11° (heating, 99%) and 102°39° (cooling, 1%).
Month by month
Wallula in January
Highs average 42°5° and lows 29°−2°, with 1.1 in29 mm of precipitation in a typical January.
- Record high
- 74°23° (1896)
- Record low
- −27°−33° (1930)
- Heating degree days
- 916
- Cooling degree days
- 0
Wallula in February
Highs average 48°9° and lows 31°−1°, with 0.79 in20 mm of precipitation in a typical February.
- Record high
- 74°23° (1986)
- Record low
- −23°−31° (1950)
- Heating degree days
- 714
- Cooling degree days
- 0
Wallula in March
Highs average 58°15° and lows 36°2°, with 0.66 in17 mm of precipitation in a typical March.
- Record high
- 87°31° (1911)
- Record low
- 8°−13° (2019)
- Heating degree days
- 558
- Cooling degree days
- 0
Wallula in April
Highs average 66°19° and lows 42°6°, with 0.61 in15 mm of precipitation in a typical April.
- Record high
- 95°35° (1910)
- Record low
- 18°−8° (1935)
- Heating degree days
- 323
- Cooling degree days
- 3
Wallula in May
Highs average 75°24° and lows 50°10°, with 0.84 in21 mm of precipitation in a typical May.
- Record high
- 104°40° (1910)
- Record low
- 26°−3° (1905)
- Heating degree days
- 125
- Cooling degree days
- 53
Wallula in June
Highs average 82°28° and lows 56°14°, with 0.58 in15 mm of precipitation in a typical June.
- Record high
- 114°46° (2021)
- Record low
- 35°2° (1984)
- Heating degree days
- 25
- Cooling degree days
- 151
Wallula in July
Highs average 91°33° and lows 62°17°, with 0.21 in5.3 mm of precipitation in a typical July.
- Record high
- 115°46° (1939)
- Record low
- 38°3° (1921)
- Heating degree days
- 1
- Cooling degree days
- 367
Wallula in August
Highs average 90°32° and lows 61°16°, with 0.17 in4.3 mm of precipitation in a typical August.
- Record high
- 115°46° (1898)
- Record low
- 37°3° (1924)
- Heating degree days
- 2
- Cooling degree days
- 337
Wallula in September
Highs average 81°27° and lows 53°12°, with 0.26 in6.6 mm of precipitation in a typical September.
- Record high
- 100°38° (1911)
- Record low
- 21°−6° (1926)
- Heating degree days
- 49
- Cooling degree days
- 104
Wallula in OctoberThis month
Highs average 66°19° and lows 43°6°, with 0.67 in17 mm of precipitation in a typical October.
- Record high
- 89°32° (1943)
- Record low
- 14°−10° (1935)
- Heating degree days
- 330
- Cooling degree days
- 5
Wallula in November
Highs average 51°11° and lows 35°2°, with 0.87 in22 mm of precipitation in a typical November.
- Record high
- 79°26° (1999)
- Record low
- −8°−22° (1985)
- Heating degree days
- 663
- Cooling degree days
- 0
Wallula in December
Highs average 42°5° and lows 30°−1°, with 1.1 in27 mm of precipitation in a typical December.
- Record high
- 72°22° (2021)
- Record low
- −29°−34° (1919)
- Heating degree days
- 913
- Cooling degree days
- 0