Climate and monthly weather forecastJefferson, WI
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Jefferson, Wisconsin, with an average temperature fluctuating between 24.3°F (-4.3°C) and 12°F (-11.1°C). In Jefferson, January is the month with the lowest recorded average temperatures, measuring a high of 24.3°F (-4.3°C) and a low of 12°F (-11.1°C). Weather in January »Weather in February
February, the last month of the winter in Jefferson, is another freezing cold month, with an average temperature ranging between max 28°F (-2.2°C) and min 14.9°F (-9.5°C). In the transition from January to February, Jefferson reports an average high-temperature of a still subzero cold 28°F (-2.2°C), indicating a close resemblance to the prior month. Weather in February »Weather in March
The first month of the spring, March, is a cold month in Jefferson, Wisconsin, with an average temperature varying between 27.1°F (-2.7°C) and 42.1°F (5.6°C). An upsurge in temperatures occurs as February gives way to March, with average highs shifting from a subzero cold 28°F (-2.2°C) to an icy 42.1°F (5.6°C). Weather in March »Weather in April
April is a cool spring month in Jefferson, Wisconsin, with temperature in the range of an average high of 54°F (12.2°C) and an average low of 37.6°F (3.1°C). The rise of average high-temperatures is seen in April, with an increase from a cold 42.1°F (5.6°C) in March to a fresh 54°F (12.2°C). Weather in April »Weather in May
May, the last month of the spring in Jefferson, is an enjoyable month, with temperature in the range of an average high of 66.6°F (19.2°C) and an average low of 48.7°F (9.3°C). A rise in the average high-temperature is observed during May, moving from a cool 54°F (12.2°C) in April to a refreshing 66.6°F (19.2°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Jefferson, Wisconsin, with an average temperature varying between 75°F (23.9°C) and 57.7°F (14.3°C). Jefferson observes a slight uplift in the average high-temperature with the onset of June, adjusting from May's comfortable 66.6°F (19.2°C) to a warm 75°F (23.9°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Jefferson, Wisconsin, with an average temperature fluctuating between 61.5°F (16.4°C) and 79.3°F (26.3°C). July temperatures tend to peak at an average high of 79.3°F (26.3°C) and dip to a low of 61.5°F (16.4°C). Weather in July »Weather in August
August, the last month of the summer in Jefferson, is another warm month, with an average temperature varying between 77.5°F (25.3°C) and 59.7°F (15.4°C). Jefferson, Wisconsin, greets August with an average high-temperature of a still moderately hot 77.5°F (25.3°C), marking a slight deviation from the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Jefferson, is still a pleasant month, with an average temperature ranging between min 52.3°F (11.3°C) and max 71.8°F (22.1°C). The transition to September results in a modest reduction in average high-temperature, moving from a moderately hot 77.5°F (25.3°C) in August to a pleasant 71.8°F (22.1°C). Weather in September »Weather in October
October, like September, is another mild autumn month in Jefferson, Wisconsin, with an average temperature varying between 58.1°F (14.5°C) and 42.1°F (5.6°C). Jefferson in October demonstrates a small temperature transition, adjusting from an average high of a pleasant 71.8°F (22.1°C) in September to a moderate 58.1°F (14.5°C). Weather in October »Weather in November
November, the last month of the autumn in Jefferson, is also a frosty month, with an average temperature ranging between min 30.4°F (-0.9°C) and max 43.7°F (6.5°C). A noticeable downshift in temperatures is seen as October gives way to November, with average highs moving from a refreshing 58.1°F (14.5°C) to a chilly 43.7°F (6.5°C). Weather in November »Weather in December
December, the first month of the winter in Jefferson, is also a subzero cold month, with an average temperature fluctuating between 31.1°F (-0.5°C) and 20.7°F (-6.3°C). With the onset of December, Jefferson's average high-temperature adjusts, receding from November's chilly 43.7°F (6.5°C) to a subzero cold 31.1°F (-0.5°C). Weather in December »Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The coldest time of the year in Jefferson is January, with temperatures averaging a high of 24.3°F (-4.3°C) and a low of 12°F (-11.1°C).
January is the most humid month, with an average relative humidity of 88%.
January and February are months with the least rain when the rain falls for 5.2 days and typically aggregates up to 1.42" (36mm) of rain.
In Jefferson, during the entire year, the rain falls for 149.4 days and collects up to 28.82" (732mm) of precipitation.
Months with snowfall in Jefferson are January through May, October through December.
In Jefferson, Wisconsin, during the entire year, snow falls for 58 days and aggregates up to 21.85" (555mm) of snow.
The month with the least sunshine in Jefferson, Wisconsin, is January, with an average of 3.4h of sunshine.
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
The month with the most snowfall is February, when snow falls for 13.4 days and typically aggregates up to 5.39" (137mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Jefferson, Wisconsin, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
With an average relative humidity of 76%, April is the least humid month in Jefferson.
June is the month with the most rainfall in Jefferson, Wisconsin. Rain falls for 18 days and accumulates 3.78" (96mm) of precipitation.
June through September are months without snowfall.
With an average of 15h and 18min of daylight, June has the longest days of the year in Jefferson.
The month with the highest UV index is June, with an average maximum UV index of 6.
The month of July sees the average highest temperatures in Jefferson, Wisconsin, reaching 79.3°F (26.3°C) at the peak and 61.5°F (16.4°C) at the low.
The month with the most sunshine in Jefferson is July, with an average of 9.8h of sunshine.
The month with the shortest days in Jefferson is December, with an average of 9h and 6min of daylight.
Average temperature
Jefferson, WI
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.3°F).
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure
Jefferson, WI
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Jefferson, WI
- Average wind speed in January:
9.6mph - Average wind speed in February:
9.7mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.5mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.3mph - Average wind speed in October:
8.7mph - Average wind speed in November:
9.3mph - Average wind speed in December:
9.1mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Jefferson, WI
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall
Jefferson, WI
- Average rainfall in January:
1.42" - Average rainfall in February:
1.42" - Average rainfall in March:
1.77" - Average rainfall in April:
3.11" - Average rainfall in May:
3.27" - Average rainfall in June:
3.78"
The wettest month (with the highest rainfall) is June (3.78").
The driest months (with the least rainfall) are January and February (1.42").
Average rainfall days
Jefferson, WI
- Average rainfall days in January:
5.2 days - Average rainfall days in February:
5 days - Average rainfall days in March:
11.1 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
19.6 days - Average rainfall days in June:
18 days
- Average rainfall days in July:
17.4 days - Average rainfall days in August:
15.6 days - Average rainfall days in September:
13.4 days - Average rainfall days in October:
12.6 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
6.9 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is February (5 days).
Average snowfall
Jefferson, WI
- Average snowfall in January:
5.24" - Average snowfall in February:
5.39" - Average snowfall in March:
2.4" - Average snowfall in April:
1.69" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.39").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Jefferson, WI
- Average snowfall days in January:
15.4 days - Average snowfall days in February:
13.4 days - Average snowfall days in March:
7.2 days - Average snowfall days in April:
2.9 days - Average snowfall days in May:
0.3 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.9 days - Average snowfall days in November:
5.3 days - Average snowfall days in December:
12.6 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Jefferson, WI
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
3h and 24min - Average sunshine in February:
3h and 36min - Average sunshine in March:
5h and 48min - Average sunshine in April:
7h and 18min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 18min
- Average sunshine in July:
9h and 48min - Average sunshine in August:
9h and 42min - Average sunshine in September:
8h and 36min - Average sunshine in October:
5h and 18min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 48min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days
Jefferson, WI
- Average sunshine days in January:
12.5 days - Average sunshine days in February:
10.8 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
10.9 days - Average sunshine days in May:
9.8 days - Average sunshine days in June:
9.8 days
- Average sunshine days in July:
10 days - Average sunshine days in August:
12.3 days - Average sunshine days in September:
14.4 days - Average sunshine days in October:
14.7 days - Average sunshine days in November:
16.1 days - Average sunshine days in December:
14.3 days
The month with the most sunshine days is November (16.1 days).
The months with the least sunshine days are May and June (9.8 days).
Average UV index
Jefferson, WI
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Jefferson, WI
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility
Jefferson, WI
The months with the highest visibility are March, April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, July, August, September and December (5mi).
