Duncan weather by month
What a typical year looks like in Duncan, Nebraska: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Genoa 2 W, 24 km from Duncan; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 27.7 in703 mm
- Snow a year
- 29 in73 cm
- Last spring freeze
- Apr 30
- First fall freeze
- Oct 3
- Heating degree days
- 6,315
- Cooling degree days
- 909
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −8°−22° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Duncan in January
Highs average 34°1° and lows 13°−10°, with 0.67 in17 mm of precipitation and 6 in16 cm of snow in a typical January.
- Record high
- 74°23° (1981)
- Record low
- −31°−35° (1912)
- Heating degree days
- 1277
- Cooling degree days
- 0
Duncan in February
Highs average 39°4° and lows 17°−8°, with 0.79 in20 mm of precipitation and 7 in18 cm of snow in a typical February.
- Record high
- 80°27° (1995)
- Record low
- −34°−37° (2021)
- Heating degree days
- 1043
- Cooling degree days
- 0
Duncan in March
Highs average 52°11° and lows 27°−3°, with 1.6 in41 mm of precipitation and 5 in12 cm of snow in a typical March.
- Record high
- 99°37° (2026)
- Record low
- −18°−28° (1978)
- Heating degree days
- 798
- Cooling degree days
- 1
Duncan in April
Highs average 63°17° and lows 37°3°, with 3 in76 mm of precipitation and 1.8 in4.6 cm of snow in a typical April.
- Record high
- 98°37° (1910)
- Record low
- −1°−18° (1975)
- Heating degree days
- 456
- Cooling degree days
- 8
Duncan in May
Highs average 73°23° and lows 49°9°, with 4.4 in111 mm of precipitation and 0.1 in0.3 cm of snow in a typical May.
- Record high
- 105°41° (1934)
- Record low
- 20°−7° (1909)
- Heating degree days
- 186
- Cooling degree days
- 58
Duncan in June
Highs average 82°28° and lows 60°15°, with 4.4 in112 mm of precipitation in a typical June.
- Record high
- 108°42° (1946)
- Record low
- 35°2° (1969)
- Heating degree days
- 23
- Cooling degree days
- 198
Duncan in July
Highs average 85°30° and lows 64°18°, with 3 in75 mm of precipitation in a typical July.
- Record high
- 116°47° (1936)
- Record low
- 40°4° (1913)
- Heating degree days
- 4
- Cooling degree days
- 299
Duncan in August
Highs average 83°28° and lows 61°16°, with 3 in77 mm of precipitation in a typical August.
- Record high
- 110°43° (1934)
- Record low
- 37°3° (1988)
- Heating degree days
- 10
- Cooling degree days
- 233
Duncan in September
Highs average 78°25° and lows 52°11°, with 2.5 in64 mm of precipitation in a typical September.
- Record high
- 106°41° (1913)
- Record low
- 13°−11° (1964)
- Heating degree days
- 103
- Cooling degree days
- 101
Duncan in OctoberThis month
Highs average 65°18° and lows 39°4°, with 2.2 in55 mm of precipitation and 1.1 in2.8 cm of snow in a typical October.
- Record high
- 97°36° (2015)
- Record low
- 2°−17° (1925)
- Heating degree days
- 418
- Cooling degree days
- 11
Duncan in November
Highs average 50°10° and lows 26°−3°, with 1.2 in31 mm of precipitation and 2.9 in7.4 cm of snow in a typical November.
- Record high
- 85°29° (2020)
- Record low
- −14°−26° (1964)
- Heating degree days
- 815
- Cooling degree days
- 0
Duncan in December
Highs average 37°3° and lows 17°−8°, with 0.95 in24 mm of precipitation and 5 in13 cm of snow in a typical December.
- Record high
- 79°26° (1939)
- Record low
- −28°−33° (1901)
- Heating degree days
- 1182
- Cooling degree days
- 0