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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, like December, is a freezing cold winter month in Iroquois, South Dakota, with an average temperature ranging between min 8.2°F (-13.2°C) and max 23.2°F (-4.9°C). With average temperatures fluctuating between a high of 23.2°F (-4.9°C) and a low of 8.2°F (-13.2°C), January stands out as the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Iroquois, South Dakota, with an average temperature varying between 12°F (-11.1°C) and 26.1°F (-3.3°C). The arrival of February coincides with an average high-temperature of a still subzero cold 26.1°F (-3.3°C), indicating a minimal shift from January's 23.2°F (-4.9°C). Weather in February »
Weather in March
March, the first month of the spring in Iroquois, is a cold month, with temperature in the range of an average high of 42.3°F (5.7°C) and an average low of 26.6°F (-3°C). Iroquois's weather experiences a significant temperature rise with the arrival of March, soaring from a freezing cold 26.1°F (-3.3°C) in February to a cold 42.3°F (5.7°C). Weather in March »
Weather in April
April in Iroquois, South Dakota, is a mild spring month, with an average temperature fluctuating between 37.9°F (3.3°C) and 55.9°F (13.3°C). The beginning of April marks a shift in the average high-temperature, moving from March's wintry 42.3°F (5.7°C) to a refreshing 55.9°F (13.3°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in Iroquois, South Dakota, with temperature in the range of an average high of 67.6°F (19.8°C) and an average low of 48.9°F (9.4°C). Iroquois's transition into May is marked by a rise in the average high-temperature, advancing from a refreshing 55.9°F (13.3°C) in April to an enjoyable 67.6°F (19.8°C). Weather in May »
Weather in June
June, the first month of the summer in Iroquois, is a warm month, with an average temperature fluctuating between 78.4°F (25.8°C) and 59.2°F (15.1°C). The onset of June brings a temperature shift, with the average high-temperature moving from a comfortable 67.6°F (19.8°C) in May to a moderately hot 78.4°F (25.8°C). Weather in June »
Weather in July
July, like June, in Iroquois, South Dakota, is a moderately hot summer month, with temperature in the range of an average low of 64.2°F (17.9°C) and an average high of 85.6°F (29.8°C). In Iroquois, July records the highest average temperatures, peaking at 85.6°F (29.8°C) and reaching a low of 64.2°F (17.9°C). In July, the heat index is estimated at a hot 93.2°F (34°C). Weather in July »
Weather in August
August, the last month of the summer in Iroquois, is another warm month, with an average temperature varying between 61.3°F (16.3°C) and 84.2°F (29°C). Iroquois marks the arrival of August with an average high-temperature of a still warm 84.2°F (29°C), hardly different from July's 85.6°F (29.8°C). Weather in August »
Weather in September
September, the first month of the autumn in Iroquois, is still a warm month, with an average temperature fluctuating between 54.5°F (12.5°C) and 75.7°F (24.3°C). September ushers in a minor alteration in Iroquois's climate, with the average high-temperature moving from August's warm 84.2°F (29°C) to a still moderately hot 75.7°F (24.3°C). Weather in September »
Weather in October
October, the same as September, in Iroquois, South Dakota, is a moderate autumn month, with an average temperature ranging between max 57.9°F (14.4°C) and min 41.5°F (5.3°C). As October begins, there is a noticeable decrease in the average high-temperature, falling from a moderately hot 75.7°F (24.3°C) in September to a mild 57.9°F (14.4°C). Weather in October »
Weather in November
November, the last month of the autumn in Iroquois, is another chilly month, with an average temperature ranging between max 43.7°F (6.5°C) and min 28.8°F (-1.8°C). The average high-temperature drops in November, from October's moderate 57.9°F (14.4°C) to a frosty 43.7°F (6.5°C). Weather in November »
Weather in December
December, the first month of the winter in Iroquois, is still a freezing cold month, with an average temperature varying between 27.3°F (-2.6°C) and 14.7°F (-9.6°C). As Iroquois transitions into December, a noticeable drop in the average high-temperature is observed, falling from a chilly 43.7°F (6.5°C) in November to a freezing cold 27.3°F (-2.6°C). Weather in December »
Updated: Aug 25, 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 month is the coldest?
January, with an average high of 23.2°F (-4.9°C) and a low of 8.2°F (-13.2°C), signifies the coldest month of the year.
What is the most humid month?
With an average relative humidity of 88%, January is the most humid month.
What is the driest month?
January is the month with the least rainfall. Rain falls for 2.7 days and accumulates 0.55" (14mm) of precipitation.
How many days does it rain?
Throughout the year, there are 101.8 rainfall days, and 18.19" (462mm) of precipitation is accumulated.
When does it snow?
January through April, October through December are months with snowfall.
How many days does it snow?
In Iroquois, during the entire year, snow falls for 42.3 days and aggregates up to 16.54" (420mm) of snow.
What is the month with the least sunshine?
With an average of 4.2h of sunshine, January has the least sunshine of the year.
What are the months with the lowest UV index?
January and November, with an average maximum UV index of 1, are months with the lowest UV index.
What is the snowiest month?
The month with the most snowfall is February, when snow falls for 8.6 days and typically aggregates up to 3.54" (90mm) of snow.
When is Daylight Saving Time (DST) in Iroquois?
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.
When it does not snow?
May through September are months without snowfall.
What is the rainiest month?
The month with the most rainfall is June, when the rain falls for 15.2 days and typically aggregates up to 2.8" (71mm) of precipitation.
When are the longest days in Iroquois?
June has the longest days of the year, with an average of 15h and 30min of daylight.
What is the month with the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the warmest month?
The warmest month is July, with an average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 64.2°F (17.9°C).
What month has the most sunshine?
The month with the most sunshine is July, with an average of 11.2h of sunshine.
What is the least humid month?
The least humid month is September, with an average relative humidity of 62%.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 8h and 54min of daylight.
Average temperature
Iroquois, SD
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (23.2°F).
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (8.2°F).
Average pressure
Iroquois, 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:
29.94"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.84"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 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
Iroquois, SD
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.9mph - Average wind speed in March:
10.4mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.8mph - Average wind speed in June:
9.2mph
- Average wind speed in July:
8.6mph - Average wind speed in August:
8.6mph - Average wind speed in September:
9.7mph - Average wind speed in October:
10.6mph - Average wind speed in November:
10.1mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (8.6mph).
Average humidity
Iroquois, SD
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is September (62%).
Average rainfall
Iroquois, SD
- Average rainfall in January:
0.55" - Average rainfall in February:
0.59" - Average rainfall in March:
1.06" - Average rainfall in April:
1.77" - Average rainfall in May:
2.36" - Average rainfall in June:
2.8"
- Average rainfall in July:
2.76" - Average rainfall in August:
1.97" - Average rainfall in September:
1.38" - Average rainfall in October:
1.57" - Average rainfall in November:
0.59" - Average rainfall in December:
0.79"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days
Iroquois, SD
- Average rainfall days in January:
2.7 days - Average rainfall days in February:
1.8 days - Average rainfall days in March:
7.8 days - Average rainfall days in April:
11.3 days - Average rainfall days in May:
13.6 days - Average rainfall days in June:
15.2 days
- Average rainfall days in July:
12.5 days - Average rainfall days in August:
11.6 days - Average rainfall days in September:
9.8 days - Average rainfall days in October:
8.1 days - Average rainfall days in November:
4.4 days - Average rainfall days in December:
3 days
The month with the highest number of rainy days is June (15.2 days).
The month with the least rainy days is February (1.8 days).
Average snowfall
Iroquois, SD
The month with the highest snowfall is February (3.54").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Iroquois, SD
- Average snowfall days in January:
9.2 days - Average snowfall days in February:
8.6 days - Average snowfall days in March:
6.3 days - Average snowfall days in April:
3 days - Average snowfall days in May:
0.1 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:
1.4 days - Average snowfall days in November:
4.2 days - Average snowfall days in December:
9.5 days
The month with the highest number of snowfall days is December (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Iroquois, SD
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 3min
- Average daylight in July:
15h and 1min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
5h and 2min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 5min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
11h and 1min - Average sunshine in August:
10h and 5min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 3min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Iroquois, SD
- Average sunshine days in January:
19.8 days - Average sunshine days in February:
18.5 days - Average sunshine days in March:
17.8 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
14.6 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
15.9 days - Average sunshine days in August:
15.8 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
20.3 days - Average sunshine days in November:
21.8 days - Average sunshine days in December:
20.9 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is June (12.3 days).
Average UV index
Iroquois, 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 November (UV index 1).
Average cloud cover
Iroquois, SD
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 22).
Average visibility
Iroquois, 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).
Iroquois, South Dakota, USA
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