Gretna weather by month
What a typical year looks like in Gretna, Nebraska: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Mead 6s, 24 km from Gretna; records cover 1968–2026.
The year at a glance
- Precipitation a year
- 30.1 in765 mm
- Snow a year
- 20 in52 cm
- Last spring freeze
- Apr 21
- First fall freeze
- Oct 11
- Heating degree days
- 6,382
- Cooling degree days
- 965
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −7°−22° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Gretna in January
Highs average 33°0° and lows 12°−11°, with 0.62 in16 mm of precipitation and 5 in12 cm of snow in a typical January.
- Record high
- 71°22° (1981)
- Record low
- −37°−38° (1982)
- Heating degree days
- 1322
- Cooling degree days
- 0
Gretna in February
Highs average 37°3° and lows 16°−9°, with 0.78 in20 mm of precipitation and 6 in15 cm of snow in a typical February.
- Record high
- 80°27° (2024)
- Record low
- −29°−34° (1975)
- Heating degree days
- 1074
- Cooling degree days
- 0
Gretna in March
Highs average 51°10° and lows 27°−3°, with 1.5 in39 mm of precipitation and 2.6 in6.6 cm of snow in a typical March.
- Record high
- 97°36° (2026)
- Record low
- −18°−28° (1984)
- Heating degree days
- 821
- Cooling degree days
- 1
Gretna in April
Highs average 63°17° and lows 37°3°, with 2.9 in74 mm of precipitation and 0.8 in2 cm of snow in a typical April.
- Record high
- 97°36° (1989)
- Record low
- 3°−16° (1975)
- Heating degree days
- 458
- Cooling degree days
- 7
Gretna in May
Highs average 73°23° and lows 49°10°, with 4.7 in120 mm of precipitation and 0.1 in0.3 cm of snow in a typical May.
- Record high
- 99°37° (1989)
- Record low
- 23°−5° (1976)
- Heating degree days
- 184
- Cooling degree days
- 58
Gretna in June
Highs average 83°28° and lows 60°16°, with 4.9 in124 mm of precipitation in a typical June.
- Record high
- 108°42° (1988)
- Record low
- 35°2° (1969)
- Heating degree days
- 20
- Cooling degree days
- 211
Gretna in July
Highs average 87°30° and lows 64°18°, with 3.1 in78 mm of precipitation in a typical July.
- Record high
- 107°42° (1995)
- Record low
- 39°4° (1971)
- Heating degree days
- 3
- Cooling degree days
- 318
Gretna in August
Highs average 85°29° and lows 61°16°, with 3.8 in96 mm of precipitation in a typical August.
- Record high
- 105°41° (1983)
- Record low
- 38°3° (1988)
- Heating degree days
- 8
- Cooling degree days
- 253
Gretna in September
Highs average 78°26° and lows 52°11°, with 3.2 in80 mm of precipitation in a typical September.
- Record high
- 107°42° (2000)
- Record low
- 26°−3° (1984)
- Heating degree days
- 101
- Cooling degree days
- 104
Gretna in OctoberThis month
Highs average 65°19° and lows 39°4°, with 2.2 in55 mm of precipitation and 0.5 in1.3 cm of snow in a typical October.
- Record high
- 95°35° (2023)
- Record low
- 9°−13° (1997)
- Heating degree days
- 406
- Cooling degree days
- 13
Gretna in November
Highs average 50°10° and lows 26°−3°, with 1.3 in34 mm of precipitation and 1.2 in3 cm of snow in a typical November.
- Record high
- 86°30° (1999)
- Record low
- −7°−22° (1976)
- Heating degree days
- 806
- Cooling degree days
- 0
Gretna in December
Highs average 37°3° and lows 17°−8°, with 1.1 in28 mm of precipitation and 4 in11 cm of snow in a typical December.
- Record high
- 69°21° (1976)
- Record low
- −27°−33° (1983)
- Heating degree days
- 1179
- Cooling degree days
- 0