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Monthly climate in Catonsville, Maryland, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Catonsville features a humid subtropical climate (Cfa).Temperatures typically range between 2 °C (36 °F) and 26 °C (80 °F) through the year, but rarely can drop to -15 °C (6 °F) or can rise to as high as 38 °C (100 °F).The average annual precipitation amounts to about 1336 mm (52.6 inches) and receives 132 rainy days on the 1 mm (0.04 inches) threshold annually.Catonsville enjoys an average of 3126 hours of sunshine throughout the year, and daylight varies from 9 hours 26 minutes to 14 hours 52 minutes per day.

Monthly average temperatures in Catonsville, Maryland, United States §

The warmest months in Catonsville are June, July and August, with daily mean temperatures ranging from 23 to 26 °C (75 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 4 °C (36 - 40 °F) throughout the day. On average each year, Catonsville experiences 104 days above 25 °C (77.0 °F) and 61 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Catonsville, Maryland, 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 21°C
(69°F)		 27°C
(80°F)		 28°C
(82°F)		 31°C
(87°F)		 33°C
(92°F)		 36°C
(96°F)		 38°C
(100°F)		 36°C
(97°F)		 35°C
(96°F)		 35°C
(96°F)		 24°C
(76°F)		 19°C
(67°F)
Mean maximum 17°C
(63°F)		 21°C
(70°F)		 25°C
(77°F)		 28°C
(83°F)		 32°C
(90°F)		 34°C
(94°F)		 36°C
(97°F)		 34°C
(94°F)		 32°C
(90°F)		 30°C
(86°F)		 23°C
(74°F)		 17°C
(63°F)
Average high 6°C
(43°F)		 9°C
(48°F)		 12°C
(54°F)		 18°C
(65°F)		 23°C
(74°F)		 28°C
(83°F)		 31°C
(88°F)		 29°C
(85°F)		 26°C
(79°F)		 21°C
(70°F)		 13°C
(55°F)		 8°C
(47°F)
Daily mean 2°C
(36°F)		 4°C
(40°F)		 7°C
(46°F)		 13°C
(56°F)		 18°C
(65°F)		 23°C
(75°F)		 26°C
(80°F)		 25°C
(77°F)		 22°C
(71°F)		 16°C
(62°F)		 8°C
(47°F)		 4°C
(40°F)
Average low -1°C
(30°F)		 0°C
(33°F)		 3°C
(38°F)		 8°C
(47°F)		 14°C
(57°F)		 19°C
(66°F)		 22°C
(72°F)		 21°C
(70°F)		 18°C
(64°F)		 12°C
(54°F)		 4°C
(39°F)		 1°C
(33°F)
Mean minimum -10°C
(14°F)		 -9°C
(17°F)		 -6°C
(22°F)		 0°C
(33°F)		 5°C
(42°F)		 12°C
(55°F)		 17°C
(64°F)		 16°C
(61°F)		 10°C
(51°F)		 4°C
(39°F)		 -4°C
(25°F)		 -6°C
(21°F)
Minimum -14°C
(7°F)		 -15°C
(6°F)		 -9°C
(16°F)		 -1°C
(30°F)		 2°C
(36°F)		 9°C
(49°F)		 15°C
(59°F)		 15°C
(60°F)		 6°C
(44°F)		 1°C
(35°F)		 -5°C
(23°F)		 -11°C
(13°F)

Compare climate in Catonsville with other places

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

Monthly average precipitation in Catonsville, Maryland, United States §

Catonsville usually has the most precipitation in May, July and August, with an average of 14 rainy days and 153 mm (6.0 inches) of precipitation per month.The driest months in Catonsville are January, March and November. On average, 78 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Catonsville, Maryland, 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) 62 (2.4) 101 (4.0) 90 (3.5) 103 (4.1) 142 (5.6) 122 (4.8) 168 (6.6) 150 (5.9) 106 (4.2) 111 (4.4) 83 (3.3) 99 (3.9)
Average precipitation days (≥ 1 mm) 8 10 10 11 14 14 13 16 11 9 7 9

Monthly sunshine hours in Catonsville, Maryland, United States §

The sunniest months in Catonsville are June, July and August, when the sun shines an average of 11 hours 7 minutes a day.Least sunny months in Catonsville: 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 Catonsville, Maryland, 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 151 182 261 265 291 338 358 327 280 250 226 192
Mean daily daylight hours 9h 44m 10h 43m 11h 58m 13h 15m 14h 20m 14h 52m 14h 34m 13h 37m 12h 23m 11h 7m 10h 0m 9h 26m

Solar UV radiation in Catonsville, Maryland, United States §

Catonsville experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 10 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Catonsville UV Index data.

Average daily maximum UV levels by month for Catonsville, Maryland, 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 9 8 7 4 3