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Monthly climate in Sister Bay, Wisconsin, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Sister Bay features a humid continental climate (Dfb). Temperatures typically range between -4 °C (24 °F) and 20 °C (68 °F) through the year, but rarely can drop to -19 °C (-2 °F) or can rise to as high as 26 °C (79 °F). The average annual precipitation amounts to about 900 mm (35.4 inches) and receives 124 rainy days on the 1 mm (0.04 inches) threshold annually. Sister Bay enjoys an average of 2954 hours of sunshine throughout the year, and daylight varies from 8 hours 47 minutes to 15 hours 33 minutes per day.

Monthly average temperatures in Sister Bay, Wisconsin, United States §

The warmest months in Sister Bay are July, August and September, with daily mean temperatures ranging from 17 to 20 °C (63 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from -4 to -1 °C (24 - 31 °F) throughout the day. On average each year, Sister Bay experiences 1 days above 25 °C (77.0 °F) and 107 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sister Bay, Wisconsin, 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 5°C
(41°F)		 6°C
(44°F)		 7°C
(45°F)		 9°C
(48°F)		 15°C
(59°F)		 22°C
(72°F)		 26°C
(79°F)		 25°C
(78°F)		 23°C
(74°F)		 20°C
(68°F)		 14°C
(57°F)		 11°C
(52°F)
Mean maximum 4°C
(39°F)		 4°C
(40°F)		 6°C
(43°F)		 7°C
(45°F)		 13°C
(56°F)		 19°C
(66°F)		 25°C
(78°F)		 24°C
(76°F)		 22°C
(72°F)		 19°C
(66°F)		 11°C
(51°F)		 7°C
(46°F)
Average high -2°C
(29°F)		 -2°C
(29°F)		 1°C
(34°F)		 4°C
(39°F)		 8°C
(47°F)		 14°C
(58°F)		 21°C
(70°F)		 22°C
(71°F)		 18°C
(65°F)		 13°C
(55°F)		 5°C
(42°F)		 1°C
(34°F)
Daily mean -4°C
(25°F)		 -4°C
(24°F)		 -1°C
(31°F)		 2°C
(36°F)		 6°C
(44°F)		 13°C
(55°F)		 19°C
(67°F)		 20°C
(68°F)		 17°C
(63°F)		 11°C
(52°F)		 4°C
(39°F)		 -1°C
(31°F)
Average low -6°C
(22°F)		 -7°C
(21°F)		 -3°C
(28°F)		 1°C
(34°F)		 5°C
(41°F)		 11°C
(53°F)		 18°C
(65°F)		 19°C
(66°F)		 16°C
(60°F)		 10°C
(49°F)		 2°C
(36°F)		 -3°C
(28°F)
Mean minimum -14°C
(7°F)		 -15°C
(5°F)		 -10°C
(14°F)		 -4°C
(26°F)		 1°C
(34°F)		 8°C
(46°F)		 14°C
(58°F)		 15°C
(60°F)		 11°C
(51°F)		 4°C
(39°F)		 -4°C
(25°F)		 -11°C
(13°F)
Minimum -18°C
(-1°F)		 -19°C
(-2°F)		 -19°C
(-1°F)		 -7°C
(19°F)		 -1°C
(31°F)		 5°C
(41°F)		 12°C
(54°F)		 15°C
(58°F)		 7°C
(45°F)		 1°C
(35°F)		 -6°C
(21°F)		 -17°C
(1°F)

Compare climate in Sister Bay with other places

Compare temperature, precipitation, sunshine, UV index in Sister Bay, Wisconsin, United States with other places around the world.

Monthly average precipitation in Sister Bay, Wisconsin, United States §

Sister Bay usually has the most precipitation in April, June and October, with an average of 11 rainy days and 95 mm (3.8 inches) of precipitation per month. The driest months in Sister Bay are January, February and March. On average, 55 mm (2.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sister Bay, Wisconsin, 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) 48 (1.9) 57 (2.3) 61 (2.4) 88 (3.5) 86 (3.4) 91 (3.6) 74 (2.9) 78 (3.1) 74 (2.9) 108 (4.2) 66 (2.6) 69 (2.7)
Average precipitation days (≥ 1 mm) 9 11 9 11 10 11 10 9 10 13 10 11

Monthly sunshine hours in Sister Bay, Wisconsin, United States §

The sunniest months in Sister Bay are June, July and August, when the sun shines an average of 11 hours 16 minutes a day. Least sunny months in Sister Bay: January, November and December receive an average of 4 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sister Bay, Wisconsin, 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 113 195 248 249 309 339 363 334 278 212 167 141
Mean daily daylight hours 9h 11m 10h 24m 11h 57m 13h 32m 14h 53m 15h 33m 15h 11m 13h 59m 12h 28m 10h 53m 9h 30m 8h 47m

Solar UV radiation in Sister Bay, Wisconsin, United States §

Sister Bay experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 9 - 9, which corresponds to the Very High 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 3. For more detailed information, check out our hourly Sister Bay UV Index data.

Average daily maximum UV levels by month for Sister Bay, Wisconsin, 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) 2 4 5 7 9 9 9 9 7 5 3 2

Detailed Monthly Weather Insights for Sister Bay, Wisconsin, United States

Discover in-depth weather details for every month in Sister Bay. 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 Sister Bay'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.