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Monthly climate in Newcastle, Wyoming, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Newcastle features a cold semi-arid climate (BSk). Temperatures typically range between -6 °C (22 °F) and 24 °C (75 °F) through the year, but rarely can drop to -32 °C (-25 °F) or can rise to as high as 39 °C (103 °F). The average annual precipitation amounts to about 405 mm (15.9 inches) and receives 81 rainy days on the 1 mm (0.04 inches) threshold annually. Newcastle enjoys an average of 3341 hours of sunshine throughout the year, and daylight varies from 8 hours 56 minutes to 15 hours 23 minutes per day.

Monthly average temperatures in Newcastle, Wyoming, United States §

The warmest months in Newcastle are June, July and August, with daily mean temperatures ranging from 20 to 24 °C (68 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -3 °C (22 - 27 °F) throughout the day. On average each year, Newcastle experiences 80 days above 25 °C (77.0 °F) and 154 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Newcastle, Wyoming, 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 13°C
(55°F)		 19°C
(66°F)		 25°C
(77°F)		 28°C
(82°F)		 32°C
(90°F)		 39°C
(102°F)		 39°C
(103°F)		 38°C
(100°F)		 39°C
(102°F)		 29°C
(84°F)		 22°C
(71°F)		 21°C
(70°F)
Mean maximum 11°C
(51°F)		 14°C
(57°F)		 21°C
(70°F)		 25°C
(78°F)		 30°C
(86°F)		 32°C
(89°F)		 37°C
(99°F)		 36°C
(97°F)		 35°C
(95°F)		 26°C
(79°F)		 19°C
(66°F)		 14°C
(58°F)
Average high 2°C
(36°F)		 1°C
(33°F)		 9°C
(49°F)		 13°C
(55°F)		 18°C
(65°F)		 27°C
(81°F)		 31°C
(87°F)		 29°C
(85°F)		 24°C
(76°F)		 13°C
(55°F)		 8°C
(47°F)		 3°C
(38°F)
Daily mean -4°C
(25°F)		 -6°C
(22°F)		 3°C
(37°F)		 6°C
(43°F)		 12°C
(54°F)		 20°C
(68°F)		 24°C
(75°F)		 22°C
(71°F)		 17°C
(63°F)		 7°C
(44°F)		 2°C
(36°F)		 -3°C
(27°F)
Average low -10°C
(15°F)		 -12°C
(11°F)		 -3°C
(26°F)		 -1°C
(31°F)		 6°C
(43°F)		 13°C
(55°F)		 16°C
(61°F)		 14°C
(58°F)		 10°C
(50°F)		 1°C
(33°F)		 -4°C
(26°F)		 -8°C
(18°F)
Mean minimum -23°C
(-9°F)		 -27°C
(-16°F)		 -14°C
(8°F)		 -12°C
(11°F)		 -1°C
(30°F)		 6°C
(43°F)		 10°C
(50°F)		 8°C
(46°F)		 2°C
(36°F)		 -12°C
(10°F)		 -13°C
(8°F)		 -20°C
(-3°F)
Minimum -28°C
(-17°F)		 -32°C
(-25°F)		 -24°C
(-11°F)		 -18°C
(-0°F)		 -3°C
(27°F)		 3°C
(38°F)		 8°C
(47°F)		 6°C
(42°F)		 -1°C
(31°F)		 -19°C
(-1°F)		 -24°C
(-10°F)		 -26°C
(-14°F)

Compare climate in Newcastle with other places

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

Monthly average precipitation in Newcastle, Wyoming, United States §

Newcastle usually has the most precipitation in April, May and July, with an average of 9 rainy days and 52 mm (2.1 inches) of precipitation per month. The driest months in Newcastle are January, November and December. On average, 19 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Newcastle, Wyoming, 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) 15 (0.6) 24 (1.0) 31 (1.2) 46 (1.8) 63 (2.5) 34 (1.3) 47 (1.8) 31 (1.2) 30 (1.2) 40 (1.6) 19 (0.8) 24 (0.9)
Average precipitation days (≥ 1 mm) 5 7 7 8 11 7 9 5 5 7 5 5

Monthly sunshine hours in Newcastle, Wyoming, United States §

The sunniest months in Newcastle are June, July and August, when the sun shines an average of 12 hours 8 minutes a day. Least sunny months in Newcastle: January, February and December receive an average of 6 hours 31 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Newcastle, Wyoming, 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 167 216 267 286 306 374 386 355 293 247 230 209
Mean daily daylight hours 9h 19m 10h 29m 11h 58m 13h 28m 14h 45m 15h 23m 15h 2m 13h 53m 12h 26m 10h 56m 9h 37m 8h 56m

Solar UV radiation in Newcastle, Wyoming, United States §

Newcastle experiences the highest level of ultraviolet (UV) radiation in April, June and July, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure. January, November and December are in the Low / 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 Newcastle UV Index data.

Average daily maximum UV levels by month for Newcastle, Wyoming, 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 6 10 9 11 11 10 8 6 4 2

Detailed Monthly Weather Insights for Newcastle, Wyoming, United States

Discover in-depth weather details for every month in Newcastle. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Newcastle's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.