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Monthly climate in New Castle, Colorado, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification New Castle features a humid continental climate (Dfb).Temperatures typically range between -6 °C (22 °F) and 21 °C (70 °F) through the year, but rarely can drop to -29 °C (-21 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 497 mm (19.6 inches) and receives 91 rainy days on the 1 mm (0.04 inches) threshold annually.New Castle enjoys an average of 3467 hours of sunshine throughout the year, and daylight varies from 9 hours 24 minutes to 14 hours 54 minutes per day.

Monthly average temperatures in New Castle, Colorado, United States §

The warmest months in New Castle are June, July and August, with daily mean temperatures ranging from 17 to 21 °C (63 - 70 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -4 °C (22 - 25 °F) throughout the day. On average each year, New Castle experiences 75 days above 25 °C (77.0 °F) and 188 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in New Castle, Colorado, 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 9°C
(48°F)		 14°C
(58°F)		 16°C
(60°F)		 20°C
(67°F)		 28°C
(83°F)		 34°C
(94°F)		 35°C
(95°F)		 33°C
(92°F)		 32°C
(90°F)		 25°C
(77°F)		 18°C
(65°F)		 12°C
(55°F)
Mean maximum 7°C
(45°F)		 9°C
(49°F)		 13°C
(56°F)		 19°C
(66°F)		 25°C
(77°F)		 29°C
(84°F)		 33°C
(92°F)		 32°C
(89°F)		 31°C
(88°F)		 22°C
(73°F)		 15°C
(59°F)		 9°C
(49°F)
Average high 1°C
(33°F)		 2°C
(35°F)		 7°C
(44°F)		 11°C
(52°F)		 18°C
(64°F)		 26°C
(79°F)		 29°C
(85°F)		 28°C
(83°F)		 24°C
(76°F)		 14°C
(57°F)		 8°C
(46°F)		 2°C
(35°F)
Daily mean -6°C
(22°F)		 -4°C
(25°F)		 1°C
(33°F)		 4°C
(39°F)		 10°C
(50°F)		 17°C
(63°F)		 21°C
(70°F)		 20°C
(68°F)		 16°C
(60°F)		 6°C
(43°F)		 -0°C
(32°F)		 -6°C
(22°F)
Average low -12°C
(10°F)		 -10°C
(14°F)		 -5°C
(22°F)		 -3°C
(27°F)		 1°C
(35°F)		 7°C
(46°F)		 11°C
(53°F)		 10°C
(51°F)		 7°C
(44°F)		 -1°C
(30°F)		 -8°C
(18°F)		 -13°C
(8°F)
Mean minimum -23°C
(-9°F)		 -20°C
(-4°F)		 -14°C
(7°F)		 -10°C
(14°F)		 -4°C
(25°F)		 1°C
(35°F)		 6°C
(43°F)		 6°C
(44°F)		 1°C
(33°F)		 -16°C
(4°F)		 -20°C
(-4°F)		 -24°C
(-11°F)
Minimum -25°C
(-12°F)		 -23°C
(-9°F)		 -17°C
(1°F)		 -14°C
(7°F)		 -7°C
(19°F)		 -3°C
(28°F)		 4°C
(39°F)		 5°C
(41°F)		 -2°C
(29°F)		 -29°C
(-19°F)		 -28°C
(-19°F)		 -29°C
(-21°F)

Compare climate in New Castle with other places

Compare temperature, precipitation, sunshine, UV index in New Castle, Colorado, United States with other places around the world.

Monthly average precipitation in New Castle, Colorado, United States §

New Castle usually has the most precipitation in February, March and October, with an average of 11 rainy days and 65 mm (2.5 inches) of precipitation per month.The driest months in New Castle are July, August and September. On average, 15 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in New Castle, Colorado, 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) 55 (2.2) 73 (2.9) 61 (2.4) 48 (1.9) 43 (1.7) 18 (0.7) 13 (0.5) 13 (0.5) 18 (0.7) 60 (2.4) 39 (1.6) 55 (2.2)
Average precipitation days (≥ 1 mm) 10 13 11 9 8 4 3 3 4 9 7 10

Monthly sunshine hours in New Castle, Colorado, United States §

The sunniest months in New Castle are June, July and August, when the sun shines an average of 12 hours 12 minutes a day.Least sunny months in New Castle: January, February and December receive an average of 6 hours 23 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in New Castle, Colorado, 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 160 211 276 307 356 381 382 358 315 272 234 209
Mean daily daylight hours 9h 43m 10h 43m 11h 58m 13h 16m 14h 22m 14h 54m 14h 36m 13h 38m 12h 23m 11h 6m 9h 58m 9h 24m

Solar UV radiation in New Castle, Colorado, United States §

New Castle experiences the highest level of ultraviolet (UV) radiation in April, June and August, when the maximum UV index can reach values of 12 - 13, which corresponds to the Extreme 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 5. For more detailed information, check out our hourly New Castle UV Index data.

Average daily maximum UV levels by month for New Castle, Colorado, 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) 4 6 9 12 12 13 12 12 10 7 5 4