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Monthly climate in Greybull, Wyoming, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Greybull features a cold desert climate (BWk). Temperatures typically range between -5 °C (24 °F) and 25 °C (77 °F) through the year, but rarely can drop to -28 °C (-19 °F) or can rise to as high as 40 °C (104 °F). The average annual precipitation amounts to about 227 mm (8.9 inches) and receives 52 rainy days on the 1 mm (0.04 inches) threshold annually. Greybull enjoys an average of 3342 hours of sunshine throughout the year, and daylight varies from 8 hours 52 minutes to 15 hours 28 minutes per day.

Monthly average temperatures in Greybull, Wyoming, United States §

The warmest months in Greybull are June, July and August, with daily mean temperatures ranging from 20 to 25 °C (69 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -5 to -2 °C (24 - 29 °F) throughout the day. On average each year, Greybull experiences 84 days above 25 °C (77.0 °F) and 134 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Greybull, 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 11°C
(52°F)		 15°C
(60°F)		 24°C
(76°F)		 28°C
(83°F)		 31°C
(89°F)		 39°C
(103°F)		 40°C
(104°F)		 38°C
(101°F)		 35°C
(96°F)		 27°C
(80°F)		 20°C
(68°F)		 19°C
(66°F)
Mean maximum 8°C
(48°F)		 12°C
(54°F)		 20°C
(69°F)		 25°C
(77°F)		 30°C
(86°F)		 32°C
(90°F)		 38°C
(100°F)		 37°C
(98°F)		 33°C
(92°F)		 24°C
(75°F)		 16°C
(61°F)		 12°C
(54°F)
Average high 2°C
(36°F)		 1°C
(34°F)		 11°C
(51°F)		 14°C
(57°F)		 19°C
(67°F)		 27°C
(81°F)		 32°C
(90°F)		 30°C
(87°F)		 24°C
(75°F)		 13°C
(56°F)		 8°C
(46°F)		 3°C
(38°F)
Daily mean -3°C
(27°F)		 -5°C
(24°F)		 5°C
(40°F)		 8°C
(46°F)		 13°C
(56°F)		 20°C
(69°F)		 25°C
(77°F)		 23°C
(73°F)		 17°C
(63°F)		 7°C
(45°F)		 2°C
(37°F)		 -2°C
(29°F)
Average low -8°C
(19°F)		 -10°C
(15°F)		 -1°C
(30°F)		 1°C
(35°F)		 7°C
(45°F)		 13°C
(55°F)		 16°C
(61°F)		 14°C
(58°F)		 10°C
(50°F)		 2°C
(35°F)		 -2°C
(28°F)		 -6°C
(21°F)
Mean minimum -19°C
(-1°F)		 -23°C
(-8°F)		 -13°C
(10°F)		 -8°C
(18°F)		 0°C
(33°F)		 6°C
(43°F)		 10°C
(49°F)		 9°C
(48°F)		 2°C
(36°F)		 -9°C
(15°F)		 -12°C
(11°F)		 -16°C
(3°F)
Minimum -28°C
(-19°F)		 -26°C
(-14°F)		 -20°C
(-4°F)		 -16°C
(3°F)		 -1°C
(30°F)		 3°C
(38°F)		 8°C
(47°F)		 7°C
(45°F)		 1°C
(34°F)		 -17°C
(1°F)		 -16°C
(3°F)		 -25°C
(-12°F)

Compare climate in Greybull with other places

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

Monthly average precipitation in Greybull, Wyoming, United States §

Greybull usually has the most precipitation in April, May and September, with an average of 6 rainy days and 32 mm (1.3 inches) of precipitation per month. The driest months in Greybull are January, July and August. On average, 9 mm (0.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Greybull, 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) 10 (0.4) 21 (0.8) 14 (0.5) 30 (1.2) 37 (1.5) 14 (0.5) 7 (0.3) 11 (0.4) 30 (1.2) 29 (1.1) 12 (0.5) 14 (0.5)
Average precipitation days (≥ 1 mm) 3 6 4 6 9 4 1 2 4 6 3 4

Monthly sunshine hours in Greybull, Wyoming, United States §

The sunniest months in Greybull are June, July and August, when the sun shines an average of 12 hours 4 minutes a day. Least sunny months in Greybull: January, February and December receive an average of 6 hours 25 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Greybull, 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 163 208 277 285 322 374 387 348 292 249 219 212
Mean daily daylight hours 9h 15m 10h 27m 11h 57m 13h 30m 14h 49m 15h 28m 15h 6m 13h 56m 12h 27m 10h 55m 9h 34m 8h 52m

Solar UV radiation in Greybull, Wyoming, United States §

Greybull experiences the highest level of ultraviolet (UV) radiation in June, July and August, 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 Greybull UV Index data.

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

Detailed Monthly Weather Insights for Greybull, Wyoming, United States

Discover in-depth weather details for every month in Greybull. 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 Greybull'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.