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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 Groton, South Dakota, is another subzero cold winter month, with an average temperature ranging between max 20.7°F (-6.3°C) and min 6.3°F (-14.3°C). Groton notes the coldest temperatures in January, with a high average of 20.7°F (-6.3°C) and a low of 6.3°F (-14.3°C). Weather in January »
Weather in February
February, the last month of the winter in Groton, is also a subzero cold month, with temperature in the range of an average high of 23.7°F (-4.6°C) and an average low of 9.1°F (-12.7°C). During February, the average high-temperature is a still freezing cold 23.7°F (-4.6°C), maintaining a close resemblance to that of the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Groton, is an icy month, with an average temperature fluctuating between 24.8°F (-4°C) and 39.7°F (4.3°C). The shift into March brings a noticeable increase in the average high-temperature, soaring from a freezing cold 23.7°F (-4.6°C) in February to a wintry 39.7°F (4.3°C). Weather in March »
Weather in April
April is a fresh spring month in Groton, South Dakota, with an average temperature varying between 54.1°F (12.3°C) and 36.9°F (2.7°C). In Groton, stepping into April signifies a significant temperature increment, moving up from March's icy 39.7°F (4.3°C) to a fresh 54.1°F (12.3°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in Groton, South Dakota, with an average temperature ranging between max 66.7°F (19.3°C) and min 48.2°F (9°C). As April gives way to May, the average high-temperature displays an increase, moving from a fresh 54.1°F (12.3°C) to an enjoyable 66.7°F (19.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Groton, South Dakota, with temperature in the range of an average low of 57.6°F (14.2°C) and an average high of 76.8°F (24.9°C). With the onset of June, Groton's average high-temperature sees a rise, moving from May's refreshing 66.7°F (19.3°C) to a warm 76.8°F (24.9°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Groton, South Dakota, with an average temperature varying between 84.7°F (29.3°C) and 63.1°F (17.3°C). Groton registers the highest average temperatures during the month of July, with peaks of 84.7°F (29.3°C) and lows of 63.1°F (17.3°C). The heat index in July is estimated at a hot 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Groton, is also a moderately hot month, with temperature in the range of an average high of 83.1°F (28.4°C) and an average low of 61°F (16.1°C). August's presence marks an average high-temperature of a still moderately hot 83.1°F (28.4°C), subtly varied from July's 84.7°F (29.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Groton, South Dakota, with an average temperature fluctuating between 74.3°F (23.5°C) and 52.9°F (11.6°C). The arrival of September suggests a slight decrease in the average high-temperature, moving from 83.1°F (28.4°C) in August to a still warm 74.3°F (23.5°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Groton, South Dakota, with temperature in the range of an average low of 40.1°F (4.5°C) and an average high of 56.3°F (13.5°C). Groton's weather undergoes a significant change with the arrival of October, as the average high-temperature drops from a moderately hot 74.3°F (23.5°C) in September to a refreshing 56.3°F (13.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Groton, is another cold month, with an average temperature fluctuating between 26.8°F (-2.9°C) and 41.7°F (5.4°C). The start of November signals a considerable reduction in the average high-temperature, receding from a mild 56.3°F (13.5°C) in October to an icy 41.7°F (5.4°C). Weather in November »
Weather in December
The first month of the winter, December, is still a freezing cold month in Groton, South Dakota, with an average temperature varying between 25°F (-3.9°C) and 12.7°F (-10.7°C). December's arrival signals a significant decrease in average high-temperatures, falling from November's cold 41.7°F (5.4°C) to a subzero cold 25°F (-3.9°C). Weather in December »
Updated: Jul 15, 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
What is the coldest time of year?
In Groton, January registers the lowest temperatures, averaging 20.7°F (-6.3°C) at the peak and 6.3°F (-14.3°C) at the lowest.
What is the most humid month?
With an average relative humidity of 88%, January is the most humid month.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 3 days and typically collects 0.59" (15mm) of precipitation.
How many days does it rain?
Throughout the year, there are 97.2 rainfall days, and 18.35" (466mm) of precipitation is accumulated.
When does it snow?
Months with snowfall in Groton are January through May, October through December.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 13 days and accumulates 3.82" (97mm) of snow.
How many days does it snow?
Throughout the year, there are 54.8 snowfall days, and 19.13" (486mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 3.9h of sunshine.
When is the lowest UV index?
January, February and November, with an average maximum UV index of 1, are months with the lowest UV index in Groton.
When is Daylight Saving Time (DST)?
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?
The month with the most rainfall in Groton is June, when the rain falls for 15 days and typically aggregates up to 3.46" (88mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 36min of daylight.
What are the months with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What is the hottest time of year?
July proves to be the warmest month, recording an average peak temperature of 84.7°F (29.3°C) and a minimum temperature of 63.1°F (17.3°C).
What month has the most sunshine?
July has the most sunshine of the year, with an average of 11.1h of sunshine.
What are the least humid months in Groton?
The months with the lowest humidity are August and September, with an average relative humidity of 60%.
What is the month with the shortest days?
With an average of 8h and 48min of daylight, December has the shortest days of the year.
Average temperature
Groton, SD
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (20.7°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure
Groton, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.17"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.85"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed
Groton, SD
- Average wind speed in January:
9.5mph - Average wind speed in February:
9.4mph - Average wind speed in March:
9.7mph - Average wind speed in April:
10.6mph - Average wind speed in May:
9.7mph - Average wind speed in June:
8.9mph
- Average wind speed in July:
8.4mph - Average wind speed in August:
8.3mph - Average wind speed in September:
9.6mph - Average wind speed in October:
10.4mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.5mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity
Groton, SD
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are August and September (60%).
Average rainfall
Groton, SD
- Average rainfall in January:
0.59" - Average rainfall in February:
0.63" - Average rainfall in March:
1.1" - Average rainfall in April:
1.65" - Average rainfall in May:
2.32" - Average rainfall in June:
3.46"
- Average rainfall in July:
2.6" - Average rainfall in August:
1.61" - Average rainfall in September:
1.26" - Average rainfall in October:
1.61" - Average rainfall in November:
0.63" - Average rainfall in December:
0.87"
The wettest month (with the highest rainfall) is June (3.46").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days
Groton, SD
- Average rainfall days in January:
3 days - Average rainfall days in February:
2 days - Average rainfall days in March:
7.1 days - Average rainfall days in April:
10.2 days - Average rainfall days in May:
13 days - Average rainfall days in June:
15 days
- Average rainfall days in July:
12.2 days - Average rainfall days in August:
10.4 days - Average rainfall days in September:
8.9 days - Average rainfall days in October:
7.8 days - Average rainfall days in November:
4.5 days - Average rainfall days in December:
3.1 days
The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is February (2 days).
Average snowfall
Groton, SD
- Average snowfall in January:
3.82" - Average snowfall in February:
3.7" - Average snowfall in March:
3.19" - Average snowfall in April:
2.32" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is January (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Groton, SD
- Average snowfall days in January:
13 days - Average snowfall days in February:
10.9 days - Average snowfall days in March:
8.7 days - Average snowfall days in April:
3.3 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:
2.1 days - Average snowfall days in November:
5.1 days - Average snowfall days in December:
11.4 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Groton, SD
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 4min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 2min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 3min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 5min - Average sunshine in March:
5h and 3min - Average sunshine in April:
7h and 4min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
11h and 1min - Average sunshine in August:
10h and 4min - Average sunshine in September:
8h and 4min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Groton, SD
- Average sunshine days in January:
17.2 days - Average sunshine days in February:
16.3 days - Average sunshine days in March:
16.4 days - Average sunshine days in April:
15.5 days - Average sunshine days in May:
15.7 days - Average sunshine days in June:
12.7 days
- Average sunshine days in July:
16.8 days - Average sunshine days in August:
18.2 days - Average sunshine days in September:
18.7 days - Average sunshine days in October:
19.8 days - Average sunshine days in November:
20.9 days - Average sunshine days in December:
18.9 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (12.7 days).
Average UV index
Groton, SD
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover
Groton, SD
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are July and August (Cloud cover 23).
Average visibility
Groton, SD
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Groton, South Dakota, USA
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