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Monthly climate in Bethany Beach, Delaware, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Bethany Beach features a humid subtropical climate (Cfa).Temperatures typically range between 4 °C (40 °F) and 25 °C (78 °F) through the year, but rarely can drop to -12 °C (11 °F) or can rise to as high as 32 °C (90 °F).The average annual precipitation amounts to about 1258 mm (49.5 inches) and receives 128 rainy days on the 1 mm (0.04 inches) threshold annually.Bethany Beach enjoys an average of 3235 hours of sunshine throughout the year, and daylight varies from 9 hours 30 minutes to 14 hours 47 minutes per day.

Monthly average temperatures in Bethany Beach, Delaware, United States §

The warmest months in Bethany Beach are July, August and September, with daily mean temperatures ranging from 23 to 25 °C (73 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 7 °C (40 - 45 °F) throughout the day. On average each year, Bethany Beach experiences 65 days above 25 °C (77.0 °F) and 21 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Bethany Beach, 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 18°C
(64°F)		 17°C
(62°F)		 21°C
(71°F)		 24°C
(76°F)		 28°C
(83°F)		 30°C
(86°F)		 32°C
(90°F)		 31°C
(88°F)		 31°C
(87°F)		 29°C
(85°F)		 22°C
(73°F)		 19°C
(66°F)
Mean maximum 15°C
(60°F)		 15°C
(59°F)		 18°C
(65°F)		 21°C
(69°F)		 26°C
(79°F)		 28°C
(83°F)		 30°C
(87°F)		 30°C
(86°F)		 29°C
(84°F)		 26°C
(79°F)		 21°C
(70°F)		 17°C
(63°F)
Average high 7°C
(45°F)		 8°C
(48°F)		 10°C
(50°F)		 14°C
(58°F)		 19°C
(66°F)		 24°C
(75°F)		 27°C
(81°F)		 27°C
(80°F)		 24°C
(76°F)		 20°C
(69°F)		 14°C
(57°F)		 10°C
(50°F)
Daily mean 4°C
(40°F)		 6°C
(42°F)		 7°C
(45°F)		 12°C
(53°F)		 16°C
(62°F)		 22°C
(71°F)		 25°C
(78°F)		 25°C
(77°F)		 23°C
(73°F)		 18°C
(65°F)		 11°C
(52°F)		 7°C
(45°F)
Average low 2°C
(36°F)		 3°C
(38°F)		 5°C
(41°F)		 9°C
(49°F)		 14°C
(58°F)		 20°C
(68°F)		 23°C
(74°F)		 23°C
(74°F)		 21°C
(70°F)		 16°C
(61°F)		 9°C
(48°F)		 5°C
(41°F)
Mean minimum -7°C
(20°F)		 -5°C
(24°F)		 -2°C
(29°F)		 4°C
(39°F)		 9°C
(48°F)		 16°C
(60°F)		 20°C
(69°F)		 20°C
(69°F)		 16°C
(61°F)		 10°C
(50°F)		 1°C
(34°F)		 -2°C
(29°F)
Minimum -12°C
(11°F)		 -10°C
(14°F)		 -4°C
(26°F)		 2°C
(35°F)		 5°C
(41°F)		 13°C
(55°F)		 19°C
(66°F)		 19°C
(66°F)		 15°C
(59°F)		 7°C
(45°F)		 -1°C
(30°F)		 -6°C
(21°F)

Compare climate in Bethany Beach with other places

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

Monthly average precipitation in Bethany Beach, Delaware, United States §

Bethany Beach usually has the most precipitation in May, October and December, with an average of 10 rainy days and 125 mm (4.9 inches) of precipitation per month.The driest months in Bethany Beach are January, April and June. On average, 84 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Bethany Beach, 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) 82 (3.2) 114 (4.5) 102 (4.0) 87 (3.4) 120 (4.7) 82 (3.2) 114 (4.5) 111 (4.4) 97 (3.8) 137 (5.4) 95 (3.8) 116 (4.6)
Average precipitation days (≥ 1 mm) 8 12 11 11 11 11 11 14 10 11 8 10

Monthly sunshine hours in Bethany Beach, Delaware, United States §

The sunniest months in Bethany Beach are June, July and August, when the sun shines an average of 11 hours 20 minutes a day.Least sunny months in Bethany Beach: January, February and December receive an average of 5 hours 54 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Bethany Beach, 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 159 186 269 287 319 343 364 335 294 258 226 191
Mean daily daylight hours 9h 48m 10h 45m 11h 58m 13h 13m 14h 16m 14h 47m 14h 30m 13h 35m 12h 23m 11h 8m 10h 3m 9h 30m

Solar UV radiation in Bethany Beach, Delaware, United States §

Bethany Beach 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 Bethany Beach UV Index data.

Average daily maximum UV levels by month for Bethany Beach, 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