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Monthly climate in West Yellowstone, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification West Yellowstone features a subarctic climate (Dfc).Temperatures typically range between -9 °C (15 °F) and 16 °C (61 °F) through the year, but rarely can drop to -32 °C (-25 °F) or can rise to as high as 30 °C (87 °F).The average annual precipitation amounts to about 712 mm (28.0 inches) and receives 142 rainy days on the 1 mm (0.04 inches) threshold annually.West Yellowstone enjoys an average of 3185 hours of sunshine throughout the year, and daylight varies from 8 hours 51 minutes to 15 hours 29 minutes per day.

Monthly average temperatures in West Yellowstone, Montana, United States §

The warmest months in West Yellowstone are June, July and August, with daily mean temperatures ranging from 11 to 16 °C (51 - 61 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -9 °C (15 - 16 °F) throughout the day. On average each year, West Yellowstone experiences 20 days above 25 °C (77.0 °F) and 225 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in West Yellowstone, Montana, 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 2°C
(36°F)		 5°C
(41°F)		 10°C
(51°F)		 14°C
(57°F)		 22°C
(71°F)		 27°C
(80°F)		 30°C
(86°F)		 30°C
(87°F)		 28°C
(82°F)		 19°C
(66°F)		 12°C
(54°F)		 5°C
(42°F)
Mean maximum -0°C
(32°F)		 2°C
(35°F)		 8°C
(47°F)		 12°C
(53°F)		 17°C
(64°F)		 21°C
(69°F)		 28°C
(83°F)		 28°C
(83°F)		 26°C
(79°F)		 15°C
(59°F)		 7°C
(45°F)		 2°C
(36°F)
Average high -6°C
(22°F)		 -5°C
(23°F)		 1°C
(34°F)		 4°C
(40°F)		 9°C
(49°F)		 17°C
(63°F)		 24°C
(75°F)		 22°C
(73°F)		 17°C
(62°F)		 6°C
(43°F)		 -0°C
(32°F)		 -5°C
(23°F)
Daily mean -9°C
(15°F)		 -9°C
(16°F)		 -4°C
(26°F)		 -1°C
(31°F)		 3°C
(38°F)		 11°C
(51°F)		 16°C
(61°F)		 14°C
(58°F)		 9°C
(49°F)		 -0°C
(32°F)		 -6°C
(22°F)		 -9°C
(15°F)
Average low -13°C
(9°F)		 -13°C
(9°F)		 -8°C
(18°F)		 -6°C
(22°F)		 -2°C
(28°F)		 3°C
(38°F)		 7°C
(45°F)		 6°C
(44°F)		 2°C
(36°F)		 -6°C
(22°F)		 -11°C
(12°F)		 -14°C
(8°F)
Mean minimum -24°C
(-11°F)		 -23°C
(-9°F)		 -18°C
(-1°F)		 -15°C
(5°F)		 -8°C
(17°F)		 -3°C
(26°F)		 1°C
(35°F)		 1°C
(34°F)		 -5°C
(24°F)		 -19°C
(-2°F)		 -23°C
(-9°F)		 -24°C
(-11°F)
Minimum -28°C
(-17°F)		 -28°C
(-19°F)		 -29°C
(-19°F)		 -19°C
(-2°F)		 -12°C
(11°F)		 -6°C
(21°F)		 -2°C
(30°F)		 -1°C
(30°F)		 -8°C
(18°F)		 -32°C
(-25°F)		 -24°C
(-12°F)		 -29°C
(-20°F)

Compare climate in West Yellowstone with other places

Compare temperature, precipitation, sunshine, UV index in West Yellowstone, Montana, United States with other places around the world.

Monthly average precipitation in West Yellowstone, Montana, United States §

West Yellowstone usually has the most precipitation in February, April and June, with an average of 15 rainy days and 79 mm (3.1 inches) of precipitation per month.The driest months in West Yellowstone are July, August and September. On average, 38 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in West Yellowstone, Montana, 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) 54 (2.1) 96 (3.8) 63 (2.5) 72 (2.9) 67 (2.6) 67 (2.7) 29 (1.2) 36 (1.4) 50 (2.0) 56 (2.2) 62 (2.4) 59 (2.3)
Average precipitation days (≥ 1 mm) 12 18 13 15 13 13 7 8 6 11 12 14

Monthly sunshine hours in West Yellowstone, Montana, United States §

The sunniest months in West Yellowstone are June, July and August, when the sun shines an average of 12 hours 6 minutes a day.Least sunny months in West Yellowstone: January, February and December receive an average of 5 hours 7 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in West Yellowstone, Montana, 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 131 166 262 278 332 363 395 355 292 249 189 168
Mean daily daylight hours 9h 14m 10h 26m 11h 57m 13h 31m 14h 50m 15h 29m 15h 7m 13h 56m 12h 27m 10h 54m 9h 33m 8h 51m

Solar UV radiation in West Yellowstone, Montana, United States §

West Yellowstone experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 11 - 11, which corresponds to the 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 West Yellowstone UV Index data.

Average daily maximum UV levels by month for West Yellowstone, Montana, 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 11 11 11 10 9 6 4 2