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Monthly climate in Lewes, Delaware, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Lewes features a humid subtropical climate (Cfa).Temperatures typically range between 4 °C (39 °F) and 26 °C (80 °F) through the year, but rarely can drop to -13 °C (9 °F) or can rise to as high as 35 °C (96 °F).The average annual precipitation amounts to about 1321 mm (52.0 inches) and receives 130 rainy days on the 1 mm (0.04 inches) threshold annually.Lewes enjoys an average of 3163 hours of sunshine throughout the year, and daylight varies from 9 hours 29 minutes to 14 hours 49 minutes per day.

Monthly average temperatures in Lewes, Delaware, United States §

The warmest months in Lewes are June, July and August, with daily mean temperatures ranging from 23 to 26 °C (74 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 6 °C (39 - 44 °F) throughout the day. On average each year, Lewes experiences 89 days above 25 °C (77.0 °F) and 31 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Lewes, Delaware, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 19°C
(66°F)		 20°C
(69°F)		 25°C
(77°F)		 28°C
(83°F)		 31°C
(88°F)		 32°C
(90°F)		 35°C
(96°F)		 34°C
(93°F)		 32°C
(89°F)		 32°C
(89°F)		 24°C
(76°F)		 19°C
(67°F)
Mean maximum 16°C
(62°F)		 17°C
(63°F)		 22°C
(72°F)		 25°C
(77°F)		 29°C
(85°F)		 31°C
(88°F)		 33°C
(92°F)		 33°C
(91°F)		 30°C
(87°F)		 28°C
(82°F)		 22°C
(72°F)		 17°C
(63°F)
Average high 7°C
(44°F)		 9°C
(48°F)		 11°C
(52°F)		 16°C
(62°F)		 21°C
(70°F)		 26°C
(79°F)		 29°C
(85°F)		 28°C
(83°F)		 25°C
(78°F)		 21°C
(70°F)		 14°C
(57°F)		 9°C
(49°F)
Daily mean 4°C
(39°F)		 5°C
(42°F)		 8°C
(46°F)		 13°C
(55°F)		 18°C
(64°F)		 23°C
(74°F)		 26°C
(80°F)		 25°C
(78°F)		 23°C
(73°F)		 18°C
(64°F)		 10°C
(51°F)		 6°C
(44°F)
Average low 1°C
(33°F)		 2°C
(36°F)		 5°C
(41°F)		 10°C
(49°F)		 15°C
(59°F)		 20°C
(68°F)		 24°C
(75°F)		 23°C
(74°F)		 20°C
(69°F)		 15°C
(59°F)		 7°C
(45°F)		 3°C
(38°F)
Mean minimum -8°C
(18°F)		 -6°C
(22°F)		 -3°C
(27°F)		 3°C
(38°F)		 8°C
(47°F)		 15°C
(60°F)		 19°C
(67°F)		 20°C
(68°F)		 15°C
(59°F)		 9°C
(48°F)		 -1°C
(31°F)		 -3°C
(26°F)
Minimum -13°C
(9°F)		 -12°C
(11°F)		 -5°C
(24°F)		 1°C
(35°F)		 5°C
(41°F)		 12°C
(54°F)		 18°C
(64°F)		 18°C
(65°F)		 13°C
(56°F)		 6°C
(43°F)		 -3°C
(26°F)		 -8°C
(18°F)

Compare climate in Lewes with other places

Compare temperature, precipitation, sunshine, UV index in Lewes, Delaware, United States with other places around the world.

Monthly average precipitation in Lewes, Delaware, United States §

Lewes usually has the most precipitation in July, August and October, with an average of 12 rainy days and 139 mm (5.5 inches) of precipitation per month.The driest months in Lewes are January, April and November. On average, 83 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Lewes, Delaware, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 70 (2.8) 107 (4.2) 107 (4.2) 89 (3.5) 131 (5.2) 98 (3.9) 141 (5.5) 141 (5.6) 104 (4.1) 135 (5.3) 89 (3.5) 109 (4.3)
Average precipitation days (≥ 1 mm) 9 12 10 11 12 11 11 15 11 10 8 10

Monthly sunshine hours in Lewes, Delaware, United States §

The sunniest months in Lewes are June, July and August, when the sun shines an average of 11 hours 11 minutes a day.Least sunny months in Lewes: January, February and December receive an average of 5 hours 46 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Lewes, Delaware, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 156 181 263 275 308 337 359 331 285 248 226 187
Mean daily daylight hours 9h 47m 10h 45m 11h 58m 13h 14m 14h 17m 14h 49m 14h 32m 13h 35m 12h 23m 11h 8m 10h 2m 9h 29m

Solar UV radiation in Lewes, Delaware, United States §

Lewes experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 10 - 10, which corresponds to the Very High category of sun exposure.January, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Lewes UV Index data.

Average daily maximum UV levels by month for Lewes, Delaware, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 5 7 9 10 10 10 10 8 7 5 3