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Monthly climate in Hanna, Wyoming, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Hanna features a humid continental climate (Dfb). Temperatures typically range between -6 °C (21 °F) and 21 °C (70 °F) through the year, but rarely can drop to -29 °C (-20 °F) or can rise to as high as 34 °C (94 °F). The average annual precipitation amounts to about 415 mm (16.3 inches) and receives 92 rainy days on the 1 mm (0.04 inches) threshold annually. Hanna enjoys an average of 3486 hours of sunshine throughout the year, and daylight varies from 9 hours 10 minutes to 15 hours 9 minutes per day.

Monthly average temperatures in Hanna, Wyoming, United States §

The warmest months in Hanna are June, July and August, with daily mean temperatures ranging from 17 to 21 °C (62 - 70 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -5 °C (21 - 24 °F) throughout the day. On average each year, Hanna experiences 63 days above 25 °C (77.0 °F) and 174 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hanna, 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 7°C
(45°F)		 11°C
(52°F)		 16°C
(62°F)		 20°C
(69°F)		 27°C
(81°F)		 34°C
(93°F)		 34°C
(94°F)		 33°C
(91°F)		 33°C
(91°F)		 23°C
(74°F)		 16°C
(61°F)		 14°C
(57°F)
Mean maximum 5°C
(41°F)		 6°C
(44°F)		 12°C
(54°F)		 19°C
(66°F)		 24°C
(75°F)		 27°C
(82°F)		 33°C
(92°F)		 32°C
(89°F)		 31°C
(88°F)		 21°C
(70°F)		 13°C
(56°F)		 8°C
(47°F)
Average high -2°C
(29°F)		 -2°C
(29°F)		 4°C
(39°F)		 9°C
(48°F)		 15°C
(59°F)		 24°C
(75°F)		 28°C
(84°F)		 27°C
(81°F)		 22°C
(72°F)		 11°C
(51°F)		 5°C
(41°F)		 -0°C
(32°F)
Daily mean -6°C
(21°F)		 -6°C
(21°F)		 -1°C
(30°F)		 3°C
(37°F)		 9°C
(48°F)		 17°C
(62°F)		 21°C
(70°F)		 19°C
(67°F)		 14°C
(58°F)		 5°C
(40°F)		 0°C
(32°F)		 -5°C
(24°F)
Average low -10°C
(14°F)		 -11°C
(13°F)		 -6°C
(22°F)		 -3°C
(26°F)		 2°C
(36°F)		 9°C
(48°F)		 12°C
(54°F)		 11°C
(52°F)		 7°C
(45°F)		 -1°C
(30°F)		 -5°C
(24°F)		 -9°C
(16°F)
Mean minimum -24°C
(-12°F)		 -24°C
(-10°F)		 -18°C
(0°F)		 -14°C
(7°F)		 -6°C
(21°F)		 2°C
(35°F)		 6°C
(43°F)		 6°C
(44°F)		 -2°C
(28°F)		 -17°C
(1°F)		 -16°C
(4°F)		 -20°C
(-4°F)
Minimum -29°C
(-20°F)		 -27°C
(-17°F)		 -26°C
(-15°F)		 -19°C
(-1°F)		 -14°C
(8°F)		 -0°C
(32°F)		 4°C
(40°F)		 5°C
(42°F)		 -8°C
(18°F)		 -27°C
(-16°F)		 -22°C
(-8°F)		 -23°C
(-10°F)

Compare climate in Hanna with other places

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

Monthly average precipitation in Hanna, Wyoming, United States §

Hanna usually has the most precipitation in March, April and May, with an average of 11 rainy days and 50 mm (2.0 inches) of precipitation per month. The driest months in Hanna are June, July and August. On average, 19 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hanna, 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) 32 (1.3) 38 (1.5) 43 (1.7) 53 (2.1) 54 (2.1) 24 (0.9) 17 (0.7) 16 (0.6) 26 (1.0) 42 (1.7) 34 (1.3) 36 (1.4)
Average precipitation days (≥ 1 mm) 8 10 9 12 13 5 4 3 4 8 6 10

Monthly sunshine hours in Hanna, Wyoming, United States §

The sunniest months in Hanna are June, July and August, when the sun shines an average of 12 hours 16 minutes a day. Least sunny months in Hanna: January, February and December receive an average of 6 hours 48 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hanna, 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 177 219 283 302 339 382 390 357 305 265 240 222
Mean daily daylight hours 9h 31m 10h 36m 11h 58m 13h 22m 14h 34m 15h 9m 14h 49m 13h 46m 12h 25m 11h 1m 9h 47m 9h 10m

Solar UV radiation in Hanna, Wyoming, United States §

Hanna experiences the highest level of ultraviolet (UV) radiation in April, June and July, when the maximum UV index can reach values of 12 - 12, 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 Hanna UV Index data.

Average daily maximum UV levels by month for Hanna, 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) 4 6 9 12 11 12 12 11 10 6 5 3

Detailed Monthly Weather Insights for Hanna, Wyoming, United States

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