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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 Hecla, South Dakota, is another subzero cold winter month, with an average temperature ranging between max 19°F (-7.2°C) and min 5.4°F (-14.8°C). January, recording an average high temperature of 19°F (-7.2°C) and a low temperature of 5.4°F (-14.8°C), is Hecla's coldest month. Weather in January »
Weather in February
February, the last month of the winter in Hecla, is another freezing cold month, with temperature in the range of an average high of 21.4°F (-5.9°C) and an average low of 7.3°F (-13.7°C). At the onset of February, Hecla records an average high-temperature of a still freezing cold 21.4°F (-5.9°C), showing little deviation from the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Hecla, is a cold month, with an average temperature fluctuating between 37°F (2.8°C) and 23°F (-5°C). As Hecla steps into March, the average high-temperature increases significantly from the a subzero cold 21.4°F (-5.9°C) of February to a wintry 37°F (2.8°C). Weather in March »
Weather in April
April in Hecla, South Dakota, is a cool spring month, with an average temperature ranging between max 51.8°F (11°C) and min 35.6°F (2°C). In April, the meteorological conditions markedly change with the average high-temperature ascending from a cold 37°F (2.8°C) in March to a cool 51.8°F (11°C). Weather in April »
Weather in May
May, the last month of the spring in Hecla, is a comfortable month, with an average temperature fluctuating between 48.2°F (9°C) and 65.7°F (18.7°C). May's onset witnesses a shift in the average high-temperature, moving from a cool 51.8°F (11°C) in April to a comfortable 65.7°F (18.7°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Hecla, South Dakota, with an average temperature fluctuating between 75.2°F (24°C) and 57°F (13.9°C). June's arrival coincides with a temperature rise, moving from May's comfortable 65.7°F (18.7°C) to a moderately hot 75.2°F (24°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Hecla, South Dakota, with an average temperature varying between 61.9°F (16.6°C) and 82°F (27.8°C). The warmest time of the year is July, with temperatures averaging a high of 82°F (27.8°C) and a low of 61.9°F (16.6°C). The heat index in July is appraised at a tropical 86°F (30°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Hecla, South Dakota, with an average temperature fluctuating between 59.7°F (15.4°C) and 81.1°F (27.3°C). An average high-temperature of a still warm 81.1°F (27.3°C) marks August, exhibiting a close resemblance to the conditions in July. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Hecla, South Dakota, with an average temperature fluctuating between 72.7°F (22.6°C) and 52.3°F (11.3°C). With the onset of September, Hecla's climate undergoes a slight change as the average high-temperature moves from a moderately hot 81.1°F (27.3°C) in August to a pleasant 72.7°F (22.6°C). Weather in September »
Weather in October
October, like September, in Hecla, South Dakota, is another fresh autumn month, with an average temperature fluctuating between 54.7°F (12.6°C) and 39.6°F (4.2°C). As Hecla transitions into October, a noticeable drop in the average high-temperature is observed, falling from a pleasant 72.7°F (22.6°C) in September to a cool 54.7°F (12.6°C). Weather in October »
Weather in November
November, the last month of the autumn in Hecla, is another cold month, with an average temperature ranging between min 26.4°F (-3.1°C) and max 39.2°F (4°C). A shift in Hecla's weather is noticeable as October turns into November, with the average high temperature decreasing from a fresh 54.7°F (12.6°C) to a wintry 39.2°F (4°C). Weather in November »
Weather in December
December, the first month of the winter in Hecla, is also a subzero cold month, with temperature in the range of an average high of 22.6°F (-5.2°C) and an average low of 12.2°F (-11°C). December brings a significant decrease in the average high-temperature, moving down from an icy 39.2°F (4°C) in November to a subzero cold 22.6°F (-5.2°C). Weather in December »
Updated: Aug 17, 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 part of the year is the coldest?
Hecla's temperature records reveal January as the coldest month, marked by average highs of 19°F (-7.2°C) and lows of 5.4°F (-14.8°C).
What is the most humid month in Hecla?
With an average relative humidity of 90%, January is the most humid month.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 3.1 days and typically collects 0.63" (16mm) of precipitation.
How much does it rain?
Throughout the year, there are 109.5 rainfall days, and 20.39" (518mm) of precipitation is accumulated.
When does it snow?
January through May, October through December are months with snowfall.
How much does it snow?
Throughout the year, there are 68.5 snowfall days, and 22.83" (580mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 3.7h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index?
The months with the lowest UV index are January and November, with an average maximum UV index of 1.
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 rainiest month?
The month with the most rainfall is June, when the rain falls for 16.8 days and typically aggregates up to 3.62" (92mm) of precipitation.
When it does not snow?
In Hecla, snow does not fall in June through September.
When are the longest days?
June has the longest days of the year, with an average of 15h and 42min of daylight.
What is the month with the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What time of the year is the hottest?
Hecla's July weather reaches an average high of 82°F (27.8°C) and an average low of 61.9°F (16.6°C), making it the warmest month.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 11h of sunshine.
What is the least humid month?
The months with the lowest humidity are August and September, with an average relative humidity of 62%.
When does it snow the most?
The month with the most snowfall is December, when snow falls for 15.2 days and typically aggregates up to 4.61" (117mm) of snow.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 8h and 42min of daylight.
Average temperature
Hecla, SD
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (19°F).
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure
Hecla, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.17"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.93"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:
29.97"Hg - Average pressure in November:
30.05"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
Hecla, SD
- Average wind speed in January:
10.2mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.8mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.9mph - Average wind speed in June:
8.9mph
- Average wind speed in July:
8.1mph - Average wind speed in August:
8.2mph - Average wind speed in September:
9.6mph - Average wind speed in October:
10.8mph - Average wind speed in November:
10.1mph - Average wind speed in December:
10.3mph
The windiest month (with the highest average wind speed) is October (10.8mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity
Hecla, SD
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are August and September (62%).
Average rainfall
Hecla, SD
- Average rainfall in January:
0.63" - Average rainfall in February:
0.71" - Average rainfall in March:
1.06" - Average rainfall in April:
1.81" - Average rainfall in May:
2.52" - Average rainfall in June:
3.62"
- Average rainfall in July:
2.99" - Average rainfall in August:
1.77" - Average rainfall in September:
1.5" - Average rainfall in October:
2.09" - Average rainfall in November:
0.67" - Average rainfall in December:
1.02"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days
Hecla, SD
- Average rainfall days in January:
3.1 days - Average rainfall days in February:
2.4 days - Average rainfall days in March:
8.3 days - Average rainfall days in April:
11.7 days - Average rainfall days in May:
15.2 days - Average rainfall days in June:
16.8 days
- Average rainfall days in July:
13 days - Average rainfall days in August:
12 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
9.3 days - Average rainfall days in November:
4.3 days - Average rainfall days in December:
3.9 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (2.4 days).
Average snowfall
Hecla, SD
- Average snowfall in January:
4.49" - Average snowfall in February:
4.29" - Average snowfall in March:
3.5" - Average snowfall in April:
2.56" - Average snowfall in May:
0.24" - Average snowfall in June:
0"
The month with the highest snowfall is December (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Hecla, SD
- Average snowfall days in January:
15.3 days - Average snowfall days in February:
13.8 days - Average snowfall days in March:
11.3 days - Average snowfall days in April:
4.5 days - Average snowfall days in May:
0.4 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:
1.7 days - Average snowfall days in November:
6.3 days - Average snowfall days in December:
15.2 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Hecla, 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:
15h and 0min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 2min - Average daylight in August:
14h and 1min - 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 4min
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:
3h and 4min - Average sunshine in February:
4h and 2min - Average sunshine in March:
5h and 1min - Average sunshine in April:
7h and 4min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
11h and 0min - Average sunshine in August:
10h and 4min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 1min - Average sunshine in December:
3h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Hecla, SD
- Average sunshine days in January:
14 days - Average sunshine days in February:
13.8 days - Average sunshine days in March:
12.8 days - Average sunshine days in April:
12.9 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
15.1 days - Average sunshine days in August:
15.4 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
17.9 days - Average sunshine days in November:
19.8 days - Average sunshine days in December:
15 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is June (10.3 days).
Average UV index
Hecla, SD
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and November (UV index 1).
Average cloud cover
Hecla, SD
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility
Hecla, SD
The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).
Hecla, South Dakota, USA
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