Heppner weather by month
What a typical year looks like in Heppner, Oregon: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Heppner, 1 km from Heppner; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 13.1 in332 mm
- Snow a year
- 13 in33 cm
- Last spring freeze
- Apr 28
- First fall freeze
- Oct 16
- Heating degree days
- 5,381
- Cooling degree days
- 531
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 9°−13° (heating, 99%) and 98°37° (cooling, 1%).
Month by month
Heppner in January
Highs average 44°6° and lows 28°−2°, with 1.3 in34 mm of precipitation and 3 in8 cm of snow in a typical January.
- Record high
- 70°21° (1918)
- Record low
- −19°−28° (1909)
- Heating degree days
- 911
- Cooling degree days
- 0
Heppner in February
Highs average 47°9° and lows 29°−2°, with 1.1 in27 mm of precipitation and 3 in9 cm of snow in a typical February.
- Record high
- 75°24° (1995)
- Record low
- −18°−28° (1933)
- Heating degree days
- 748
- Cooling degree days
- 0
Heppner in March
Highs average 55°13° and lows 34°1°, with 1.4 in35 mm of precipitation and 0.9 in2.3 cm of snow in a typical March.
- Record high
- 81°27° (2025)
- Record low
- 3°−16° (1906)
- Heating degree days
- 646
- Cooling degree days
- 0
Heppner in April
Highs average 61°16° and lows 38°3°, with 1.5 in37 mm of precipitation and 0.1 in0.3 cm of snow in a typical April.
- Record high
- 92°33° (1910)
- Record low
- 15°−9° (1987)
- Heating degree days
- 472
- Cooling degree days
- 1
Heppner in May
Highs average 69°21° and lows 45°7°, with 1.7 in43 mm of precipitation in a typical May.
- Record high
- 100°38° (1903)
- Record low
- 25°−4° (1954)
- Heating degree days
- 268
- Cooling degree days
- 18
Heppner in June
Highs average 77°25° and lows 50°10°, with 1.4 in34 mm of precipitation in a typical June.
- Record high
- 109°43° (2021)
- Record low
- 31°−1° (2002)
- Heating degree days
- 117
- Cooling degree days
- 58
Heppner in July
Highs average 87°30° and lows 55°13°, with 0.31 in7.9 mm of precipitation in a typical July.
- Record high
- 108°42° (1928)
- Record low
- 32°0° (1986)
- Heating degree days
- 23
- Cooling degree days
- 207
Heppner in August
Highs average 86°30° and lows 55°13°, with 0.28 in7.1 mm of precipitation in a typical August.
- Record high
- 110°43° (1898)
- Record low
- 35°2° (1907)
- Heating degree days
- 20
- Cooling degree days
- 187
Heppner in September
Highs average 77°25° and lows 48°9°, with 0.43 in11 mm of precipitation in a typical September.
- Record high
- 99°37° (1955)
- Record low
- 19°−7° (1926)
- Heating degree days
- 123
- Cooling degree days
- 57
Heppner in OctoberThis month
Highs average 64°18° and lows 40°4°, with 1.2 in30 mm of precipitation and 0.2 in0.5 cm of snow in a typical October.
- Record high
- 92°33° (1980)
- Record low
- 10°−12° (1935)
- Heating degree days
- 417
- Cooling degree days
- 3
Heppner in November
Highs average 51°11° and lows 32°0°, with 1.4 in35 mm of precipitation and 0.9 in2.3 cm of snow in a typical November.
- Record high
- 80°27° (1908)
- Record low
- −9°−23° (1985)
- Heating degree days
- 702
- Cooling degree days
- 0
Heppner in December
Highs average 43°6° and lows 27°−3°, with 1.3 in32 mm of precipitation and 4 in11 cm of snow in a typical December.
- Record high
- 75°24° (1939)
- Record low
- −18°−28° (1919)
- Heating degree days
- 934
- Cooling degree days
- 0