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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Jefferson, South Dakota, is a freezing cold winter month, with an average temperature varying between 27°F (-2.8°C) and 13.1°F (-10.5°C). In Jefferson, the month of January registers the lowest temperatures, averaging 27°F (-2.8°C) at the peak and 13.1°F (-10.5°C) at the lowest. Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Jefferson, South Dakota, with temperature in the range of an average low of 16.7°F (-8.5°C) and an average high of 30.7°F (-0.7°C). Transitioning from January to February, Jefferson observes an average high-temperature of a still subzero cold 30.7°F (-0.7°C), differing subtly from the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Jefferson, South Dakota, with temperature in the range of an average high of 46.6°F (8.1°C) and an average low of 30.9°F (-0.6°C). March's onset brings a clear escalation in the average high-temperature, soaring from a subzero cold 30.7°F (-0.7°C) in February to a chilly 46.6°F (8.1°C). Weather in March »
Weather in April
April is a refreshing spring month in Jefferson, South Dakota, with temperature in the range of an average high of 58.6°F (14.8°C) and an average low of 40.8°F (4.9°C). As Jefferson transitions into April, the average high-temperature shows a change, moving from a frosty 46.6°F (8.1°C) in March to a refreshing 58.6°F (14.8°C). Weather in April »
Weather in May
May, the last month of the spring in Jefferson, is an agreeable month, with an average temperature ranging between min 52.2°F (11.2°C) and max 69.4°F (20.8°C). The arrival of May brings a temperature shift, with the average high-temperature escalating from a refreshing 58.6°F (14.8°C) in April to a pleasant 69.4°F (20.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Jefferson, South Dakota, with an average temperature fluctuating between 79.9°F (26.6°C) and 62.2°F (16.8°C). In Jefferson, the average high-temperature in June rises, from an agreeable 69.4°F (20.8°C) in May, to a warm 79.9°F (26.6°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Jefferson, South Dakota, with an average temperature varying between 64.9°F (18.3°C) and 84°F (28.9°C). July, with its average high-temperature of 84°F (28.9°C) and an average low-temperature of 64.9°F (18.3°C), holds the record as the warmest month. The heat index value for July is estimated at a tropical 91.4°F (33°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Jefferson, South Dakota, with an average temperature varying between 61.3°F (16.3°C) and 82°F (27.8°C). August reports an average high-temperature of a still moderately hot 82°F (27.8°C), slightly varied from July's 84°F (28.9°C). Weather in August »
Weather in September
September, the first month of the autumn in Jefferson, is still a warm month, with an average temperature fluctuating between 55°F (12.8°C) and 76.1°F (24.5°C). As August makes way for September, Jefferson's average high-temperature eases from a warm 82°F (27.8°C) to a still moderately hot 76.1°F (24.5°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Jefferson, South Dakota, with an average temperature ranging between min 43.3°F (6.3°C) and max 59.9°F (15.5°C). As September gives way to October, the average high-temperature displays a considerable decrease, falling from a moderately hot 76.1°F (24.5°C) to a moderate 59.9°F (15.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Jefferson, is another chilly month, with an average temperature varying between 31.5°F (-0.3°C) and 45.9°F (7.7°C). With the beginning of November, the average high-temperature shows a decrease, transitioning from a moderate 59.9°F (15.5°C) in October to a frosty 45.9°F (7.7°C). Weather in November »
Weather in December
December, the first month of the winter in Jefferson, is also a subzero cold month, with temperature in the range of an average low of 18.7°F (-7.4°C) and an average high of 30.7°F (-0.7°C). In Jefferson, the average high-temperature in December drops, from a chilly 45.9°F (7.7°C) in November, to a freezing cold 30.7°F (-0.7°C). Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Jefferson?
In Jefferson, January is the month with the lowest recorded average temperatures, measuring a high of 27°F (-2.8°C) and a low of 13.1°F (-10.5°C).
What is the most humid month in Jefferson?
The most humid month in Jefferson, South Dakota, is January, with an average relative humidity of 84%.
How much does it rain in Jefferson?
In Jefferson, during the entire year, the rain falls for 122 days and collects up to 21.61" (549mm) of precipitation.
When does it snow in Jefferson?
Months with snowfall are January through May, October through December.
What is the snowiest month in Jefferson?
January is the month with the most snowfall. Snow falls for 9.6 days and accumulates 2.95" (75mm) of snow.
How much does it snow in Jefferson?
Throughout the year, in Jefferson, South Dakota, there are 38 snowfall days, and 13.23" (336mm) of snow is accumulated.
What is the month with the least sunshine in Jefferson?
With an average of 4.4h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Jefferson?
January is the month with the lowest UV index, with an average maximum UV index of 1.
What is the driest month in Jefferson?
February is the month with the least rainfall. Rain falls for 3.3 days and accumulates 0.67" (17mm) of precipitation.
When is Daylight Saving Time (DST) in Jefferson?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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.
What is the wettest month in Jefferson?
The wettest months in Jefferson are May and June, with an average 3.03" (77mm) of rainfall.
When it does not snow in Jefferson?
In Jefferson, South Dakota, snow does not fall in June through September.
When are the longest days in Jefferson?
With an average of 15h and 18min of daylight, June has the longest days of the year.
When is the highest UV index in Jefferson?
The months with the highest UV index in Jefferson, South Dakota, are June and July, with an average maximum UV index of 6.
What part of the year is the hottest in Jefferson?
July, noted for its average high-temperature of 84°F (28.9°C) and an average low-temperature of 64.9°F (18.3°C), is considered the warmest month in Jefferson.
What month has the most sunshine in Jefferson?
With an average of 10.7h of sunshine, July has the most sunshine of the year in Jefferson.
What is the least humid month in Jefferson?
October is the least humid month, with an average relative humidity of 65%.
What is the month with the shortest days in Jefferson?
The month with the shortest days in Jefferson, South Dakota, is December, with an average of 9h and 6min of daylight.
Average temperature
Jefferson, SD
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (27°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure
Jefferson, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.86"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.94"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed
Jefferson, SD
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.7mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.4mph - Average wind speed in June:
8.7mph
- Average wind speed in July:
7.6mph - Average wind speed in August:
8mph - Average wind speed in September:
9mph - Average wind speed in October:
10.2mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10.2mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity
Jefferson, SD
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (65%).
Average rainfall
Jefferson, SD
- Average rainfall in January:
0.75" - Average rainfall in February:
0.67" - Average rainfall in March:
1.69" - Average rainfall in April:
2.56" - Average rainfall in May:
3.03" - Average rainfall in June:
3.03"
- Average rainfall in July:
1.89" - Average rainfall in August:
2.2" - Average rainfall in September:
1.93" - Average rainfall in October:
1.85" - Average rainfall in November:
0.79" - Average rainfall in December:
1.22"
The wettest months (with the highest rainfall) are May and June (3.03").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days
Jefferson, SD
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
9.8 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
16.2 days - Average rainfall days in June:
17.8 days
- Average rainfall days in July:
12.7 days - Average rainfall days in August:
13.6 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
6.1 days - Average rainfall days in December:
4.1 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall
Jefferson, SD
- Average snowfall in January:
2.95" - Average snowfall in February:
2.36" - Average snowfall in March:
2.48" - Average snowfall in April:
1.61" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Jefferson, SD
- Average snowfall days in January:
9.6 days - Average snowfall days in February:
8.3 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
2.1 days - Average snowfall days in May:
0.2 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:
0.7 days - Average snowfall days in November:
3.4 days - Average snowfall days in December:
8.4 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Jefferson, SD
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
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:
4h and 2min - Average sunshine in February:
5h and 2min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 5min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Jefferson, SD
- Average sunshine days in January:
19.2 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
15.6 days - Average sunshine days in April:
13.6 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
9.7 days
- Average sunshine days in July:
15 days - Average sunshine days in August:
14.7 days - Average sunshine days in September:
16.4 days - Average sunshine days in October:
18.7 days - Average sunshine days in November:
20.9 days - Average sunshine days in December:
20.1 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (9.7 days).
Average UV index
Jefferson, SD
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Jefferson, SD
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility
Jefferson, SD
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Jefferson, South Dakota, USA
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