Lewes weather by month
What a typical year looks like in Lewes, Delaware: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Georgetown-Delaware Coastal Airport, 21 km from Lewes; records cover 1945–2026.
The year at a glance
- Precipitation a year
- 43.9 in1115 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 10
- First fall freeze
- Nov 4
- Heating degree days
- 4,070
- Cooling degree days
- 1,395
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 12°−11° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
Lewes in January
Highs average 45°7° and lows 29°−2°, with 3 in76 mm of precipitation in a typical January.
- Record high
- 77°25° (2002)
- Record low
- −13°−25° (1987)
- Heating degree days
- 871
- Cooling degree days
- 0
Lewes in February
Highs average 48°9° and lows 30°−1°, with 2.6 in66 mm of precipitation in a typical February.
- Record high
- 77°25° (2017)
- Record low
- −8°−22° (1979)
- Heating degree days
- 731
- Cooling degree days
- 0
Lewes in March
Highs average 55°13° and lows 36°2°, with 3.9 in98 mm of precipitation in a typical March.
- Record high
- 88°31° (1945)
- Record low
- 3°−16° (1960)
- Heating degree days
- 600
- Cooling degree days
- 3
Lewes in April
Highs average 66°19° and lows 45°7°, with 3.3 in84 mm of precipitation in a typical April.
- Record high
- 94°34° (2002)
- Record low
- 20°−7° (1965)
- Heating degree days
- 301
- Cooling degree days
- 25
Lewes in May
Highs average 75°24° and lows 55°13°, with 3.6 in92 mm of precipitation in a typical May.
- Record high
- 98°37° (1991)
- Record low
- 26°−3° (1947)
- Heating degree days
- 106
- Cooling degree days
- 91
Lewes in June
Highs average 83°28° and lows 64°18°, with 4.1 in103 mm of precipitation in a typical June.
- Record high
- 101°38° (1959)
- Record low
- 35°2° (1993)
- Heating degree days
- 10
- Cooling degree days
- 266
Lewes in July
Highs average 88°31° and lows 70°21°, with 4.1 in105 mm of precipitation in a typical July.
- Record high
- 104°40° (2011)
- Record low
- 43°6° (1952)
- Heating degree days
- 0
- Cooling degree days
- 422
Lewes in August
Highs average 86°30° and lows 68°20°, with 4 in101 mm of precipitation in a typical August.
- Record high
- 100°38° (1953)
- Record low
- 42°6° (1976)
- Heating degree days
- 0
- Cooling degree days
- 363
Lewes in September
Highs average 80°26° and lows 61°16°, with 4.5 in115 mm of precipitation in a typical September.
- Record high
- 98°37° (1953)
- Record low
- 32°0° (1956)
- Heating degree days
- 24
- Cooling degree days
- 184
Lewes in OctoberThis month
Highs average 69°21° and lows 49°10°, with 4.1 in104 mm of precipitation in a typical October.
- Record high
- 96°36° (2019)
- Record low
- 21°−6° (1952)
- Heating degree days
- 214
- Cooling degree days
- 38
Lewes in November
Highs average 59°15° and lows 40°4°, with 3.2 in81 mm of precipitation in a typical November.
- Record high
- 86°30° (1950)
- Record low
- 14°−10° (1989)
- Heating degree days
- 478
- Cooling degree days
- 2
Lewes in December
Highs average 50°10° and lows 33°0°, with 3.5 in88 mm of precipitation in a typical December.
- Record high
- 77°25° (1991)
- Record low
- −7°−22° (1958)
- Heating degree days
- 735
- Cooling degree days
- 1