Climate and monthly weather forecastEureka, SD
Climate and monthly weather forecast
Weather in January
January, the same as December, in Eureka, South Dakota, is another subzero cold winter month, with an average temperature varying between 23°F (-5°C) and 9°F (-12.8°C). January is Eureka's coldest month, registering average high temperatures of 23°F (-5°C) and lows of 9°F (-12.8°C). Weather in January »Weather in February
February, the last month of the winter in Eureka, is another freezing cold month, with an average temperature fluctuating between 25.2°F (-3.8°C) and 11.7°F (-11.3°C). The arrival of February brings an average high-temperature of a still subzero cold 25.2°F (-3.8°C), nearly identical to January's 23°F (-5°C). Weather in February »Weather in March
The first month of the spring, March, is a cold month in Eureka, South Dakota, with an average temperature fluctuating between 40.5°F (4.7°C) and 25.9°F (-3.4°C). The shift from February to March brings a noticeable increase in the average high-temperature, escalating from a subzero cold 25.2°F (-3.8°C) to a wintry 40.5°F (4.7°C). Weather in March »Weather in April
April is a cool spring month in Eureka, South Dakota, with temperature in the range of an average low of 36.9°F (2.7°C) and an average high of 54.1°F (12.3°C). Eureka, South Dakota, experiences a temperature shift with the start of April, with average high-temperatures moving from an icy 40.5°F (4.7°C) in March to a cool 54.1°F (12.3°C). Weather in April »Weather in May
The last month of the spring, May, is a comfortable month in Eureka, South Dakota, with an average temperature ranging between min 48.2°F (9°C) and max 66.6°F (19.2°C). The start of May is characterized by an increase in the average high-temperature, transitioning from a cool 54.1°F (12.3°C) in April to a comfortable 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 Eureka, South Dakota, with an average temperature varying between 58.6°F (14.8°C) and 78.3°F (25.7°C). June's onset brings a rise in the average high-temperature, moving from an enjoyable 66.6°F (19.2°C) in May to a warm 78.3°F (25.7°C). Weather in June »Weather in July
July in Eureka, South Dakota, is a tropical summer month, with temperature in the range of an average high of 86.4°F (30.2°C) and an average low of 65.5°F (18.6°C). July, on average, is the warmest month, registering a high temperature of 86.4°F (30.2°C) and a low of 65.5°F (18.6°C). For most parts of July, the heat index is appraised at a tropical 89.6°F (32°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Eureka, South Dakota, with an average temperature varying between 63.3°F (17.4°C) and 84.2°F (29°C). The commencement of August records an average high-temperature of a moderately hot 84.2°F (29°C), barely varying from July's 86.4°F (30.2°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Eureka, South Dakota, with temperature in the range of an average high of 74.5°F (23.6°C) and an average low of 54.5°F (12.5°C). The beginning of September involves a decrease in the average high-temperature, transitioning from a warm 84.2°F (29°C) in August to a still moderately hot 74.5°F (23.6°C). Weather in September »Weather in October
October, like September, is another mild autumn month in Eureka, South Dakota, with temperature in the range of an average low of 41.4°F (5.2°C) and an average high of 55.9°F (13.3°C). October's arrival witnesses a distinct temperature drop, receding from September's warm 74.5°F (23.6°C) to a moderate 55.9°F (13.3°C). Weather in October »Weather in November
November, the last month of the autumn in Eureka, is also a wintry month, with an average temperature fluctuating between 41.5°F (5.3°C) and 28.4°F (-2°C). As November begins, there is a noticeable decrease in the average high-temperature, falling from a mild 55.9°F (13.3°C) in October to a cold 41.5°F (5.3°C). Weather in November »Weather in December
December, the first month of the winter in Eureka, is still a freezing cold month, with temperature in the range of an average high of 25.7°F (-3.5°C) and an average low of 14.4°F (-9.8°C). A shift in Eureka's weather is noticeable as November turns into December, with the average high temperature decreasing from a cold 41.5°F (5.3°C) to a freezing cold 25.7°F (-3.5°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
With its average high temperature of 23°F (-5°C) and a low of 9°F (-12.8°C), January is regarded as the coldest month in Eureka.
January is the most humid month, with an average relative humidity of 87%.
The month with the least rainfall in Eureka is January, when the rain falls for 2.3 days and typically collects 0.47" (12mm) of precipitation.
In Eureka, during the entire year, the rain falls for 89.4 days and collects up to 15.39" (391mm) of precipitation.
January through May, October through December are months with snowfall.
In Eureka, during the entire year, snow falls for 49.4 days and aggregates up to 19.09" (485mm) of snow.
January has the least sunshine of the year in Eureka, with an average of 4.1h of sunshine.
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
February is the month with the most snowfall in Eureka. Snow falls for 10.3 days and accumulates 3.98" (101mm) of snow.
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.
June is the month with the most rainfall. Rain falls for 13.8 days and accumulates 2.32" (59mm) of precipitation.
June through September are months without snowfall.
The month with the longest days is June, with an average of 15h and 42min of daylight.
The months with the highest UV index in Eureka, South Dakota, are June through August, with an average maximum UV index of 6.
July, with its average high-temperature of 86.4°F (30.2°C) and an average low-temperature of 65.5°F (18.6°C), holds the record as the warmest month in Eureka, South Dakota.
The month with the most sunshine in Eureka, South Dakota, is July, with an average of 11.4h of sunshine.
With an average relative humidity of 52%, August is the least humid month in Eureka.
With an average of 8h and 42min of daylight, December has the shortest days of the year.
Average temperature
Eureka, SD
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (23°F).
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure
Eureka, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.16"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.84"Hg
- Average pressure in July:
29.9"Hg - Average pressure in August:
29.9"Hg - Average pressure in September:
29.94"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.13"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed
Eureka, SD
- Average wind speed in January:
10mph - Average wind speed in February:
9.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
11.5mph - Average wind speed in May:
10.8mph - Average wind speed in June:
10.4mph
- Average wind speed in July:
9.8mph - Average wind speed in August:
9.5mph - Average wind speed in September:
11.1mph - Average wind speed in October:
11.4mph - Average wind speed in November:
10.2mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is February (9.4mph).
Average humidity
Eureka, SD
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (52%).
Average rainfall
Eureka, SD
- Average rainfall in January:
0.47" - Average rainfall in February:
0.67" - Average rainfall in March:
0.98" - Average rainfall in April:
1.57" - Average rainfall in May:
2.28" - Average rainfall in June:
2.32"
- Average rainfall in July:
2.09" - Average rainfall in August:
1.18" - Average rainfall in September:
1.18" - Average rainfall in October:
1.38" - Average rainfall in November:
0.59" - Average rainfall in December:
0.67"
The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days
Eureka, SD
- Average rainfall days in January:
2.3 days - Average rainfall days in February:
1.3 days - Average rainfall days in March:
6.3 days - Average rainfall days in April:
10.4 days - Average rainfall days in May:
13.2 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
11 days - Average rainfall days in August:
10.4 days - Average rainfall days in September:
7.1 days - Average rainfall days in October:
7.5 days - Average rainfall days in November:
3.4 days - Average rainfall days in December:
2.7 days
The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is February (1.3 days).
Average snowfall
Eureka, SD
- Average snowfall in January:
2.87" - Average snowfall in February:
3.98" - Average snowfall in March:
3.11" - Average snowfall in April:
2.8" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is February (3.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Eureka, SD
- Average snowfall days in January:
11.8 days - Average snowfall days in February:
10.3 days - Average snowfall days in March:
7.8 days - Average snowfall days in April:
3.6 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:
1.6 days - Average snowfall days in November:
4.5 days - Average snowfall days in December:
9.5 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Eureka, SD
- Average daylight in January:
9h and 12min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 42min
- Average daylight in July:
15h and 18min - Average daylight in August:
14h and 6min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 30min - Average daylight in December:
8h and 42min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January:
4h and 6min - Average sunshine in February:
5h and 12min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 48min - Average sunshine in May:
9h and 18min - Average sunshine in June:
10h and 42min
- Average sunshine in July:
11h and 24min - Average sunshine in August:
10h and 54min - Average sunshine in September:
8h and 36min - Average sunshine in October:
6h and 36min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Eureka, SD
- Average sunshine days in January:
18 days - Average sunshine days in February:
17.8 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
14.6 days - Average sunshine days in May:
15.5 days - Average sunshine days in June:
13.6 days
- Average sunshine days in July:
16.7 days - Average sunshine days in August:
18 days - Average sunshine days in September:
19.6 days - Average sunshine days in October:
21 days - Average sunshine days in November:
21.5 days - Average sunshine days in December:
20.1 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.6 days).
Average UV index
Eureka, 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 and December (UV index 1).
Average cloud cover
Eureka, SD
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 21).
Average visibility
Eureka, 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).
