Last updated: May 6, 2024
Under the Köppen–Geiger climate classification Sylvan features a humid continental climate (Dfb).Temperatures typically range between -7 °C (20 °F) and 23 °C (74 °F) through the year, but rarely can drop to -34 °C (-29 °F) or can rise to as high as 34 °C (94 °F).The average annual precipitation amounts to about 1039 mm (40.9 inches) and receives 119 rainy days on the 1 mm (0.04 inches) threshold annually.Sylvan enjoys an average of 2918 hours of sunshine throughout the year, and daylight varies from 8 hours 59 minutes to 15 hours 21 minutes per day.
The warmest months in Sylvan are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (70 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -7 to -2 °C (20 - 28 °F) throughout the day. On average each year, Sylvan experiences 70 days above 25 °C (77.0 °F) and 130 days below 0 °C (32.0 °F).
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Maximum | 10°C (50°F) | 19°C (66°F) | 21°C (70°F) | 27°C (80°F) | 34°C (93°F) | 34°C (94°F) | 34°C (94°F) | 33°C (92°F) | 33°C (92°F) | 30°C (86°F) | 22°C (72°F) | 18°C (66°F) |
Mean maximum | 7°C (44°F) | 12°C (54°F) | 17°C (63°F) | 24°C (76°F) | 31°C (88°F) | 32°C (90°F) | 33°C (91°F) | 31°C (88°F) | 30°C (86°F) | 28°C (82°F) | 16°C (61°F) | 13°C (55°F) |
Average high | -3°C (27°F) | -1°C (30°F) | 7°C (44°F) | 12°C (54°F) | 20°C (68°F) | 26°C (79°F) | 28°C (82°F) | 26°C (79°F) | 23°C (74°F) | 14°C (58°F) | 6°C (42°F) | 1°C (34°F) |
Daily mean | -7°C (20°F) | -6°C (22°F) | 2°C (36°F) | 7°C (46°F) | 15°C (59°F) | 21°C (70°F) | 23°C (74°F) | 21°C (71°F) | 18°C (65°F) | 10°C (50°F) | 2°C (35°F) | -2°C (28°F) |
Average low | -10°C (13°F) | -11°C (13°F) | -2°C (29°F) | 3°C (37°F) | 10°C (51°F) | 16°C (62°F) | 19°C (66°F) | 16°C (62°F) | 13°C (55°F) | 6°C (43°F) | -2°C (29°F) | -6°C (22°F) |
Mean minimum | -24°C (-11°F) | -24°C (-11°F) | -13°C (8°F) | -5°C (24°F) | 2°C (36°F) | 11°C (52°F) | 14°C (58°F) | 11°C (52°F) | 6°C (43°F) | -3°C (27°F) | -11°C (13°F) | -18°C (0°F) |
Minimum | -33°C (-27°F) | -34°C (-29°F) | -25°C (-12°F) | -9°C (16°F) | -0°C (32°F) | 8°C (47°F) | 12°C (55°F) | 10°C (51°F) | 3°C (38°F) | -5°C (24°F) | -16°C (4°F) | -23°C (-10°F) |
Compare temperature, precipitation, sunshine, UV index in Sylvan, Wisconsin, United States with other places around the world.
Sylvan usually has the most precipitation in May, June and October, with an average of 12 rainy days and 127 mm (5.0 inches) of precipitation per month.The driest months in Sylvan are January, November and December. On average, 45 mm (1.8 inches) of precipitation falls during these months.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Average precipitation mm (inches) | 39 (1.5) | 54 (2.1) | 59 (2.3) | 87 (3.4) | 135 (5.3) | 125 (4.9) | 103 (4.1) | 101 (4.0) | 120 (4.7) | 120 (4.7) | 52 (2.1) | 44 (1.7) |
Average precipitation days (≥ 1 mm) | 8 | 7 | 9 | 11 | 15 | 11 | 10 | 11 | 10 | 12 | 8 | 7 |
The sunniest months in Sylvan are June, July and August, when the sun shines an average of 11 hours 9 minutes a day.Least sunny months in Sylvan: January, November and December receive an average of 5 hours 20 minutes of sunshine daily.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean monthly sunshine hours | 126 | 199 | 234 | 234 | 270 | 336 | 361 | 328 | 260 | 200 | 189 | 175 |
Mean daily daylight hours | 9h 21m | 10h 30m | 11h 58m | 13h 27m | 14h 43m | 15h 21m | 15h 0m | 13h 52m | 12h 26m | 10h 57m | 9h 39m | 8h 59m |
Sylvan experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, 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 Sylvan UV Index data.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
UV Index (month maximum) | 2 | 4 | 5 | 8 | 9 | 10 | 10 | 9 | 8 | 5 | 3 | 2 |