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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 Isabel, South Dakota, with an average temperature ranging between min 13.6°F (-10.2°C) and max 27°F (-2.8°C). In Isabel, the lowest temperatures are generally noted in January, averaging a high of 27°F (-2.8°C) and a low of 13.6°F (-10.2°C). Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Isabel, South Dakota, with an average temperature ranging between min 15.8°F (-9°C) and max 29.1°F (-1.6°C). The shift into February uncovers an average high-temperature of a still subzero cold 29.1°F (-1.6°C), subtly different from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Isabel, is a chilly month, with an average temperature varying between 43.2°F (6.2°C) and 27.9°F (-2.3°C). With the onset of March, the average high-temperature slightly shifts from February's freezing cold 29.1°F (-1.6°C) to a chilly 43.2°F (6.2°C). Weather in March »
Weather in April
April in Isabel, South Dakota, is a fresh spring month, with an average temperature fluctuating between 37.2°F (2.9°C) and 54.3°F (12.4°C). The beginning of April marks a shift in the average high-temperature, moving from March's frosty 43.2°F (6.2°C) to a fresh 54.3°F (12.4°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Isabel, South Dakota, with temperature in the range of an average low of 47.8°F (8.8°C) and an average high of 66°F (18.9°C). May witnesses an increase in the average high-temperature, moving from a cool 54.3°F (12.4°C) in April to a comfortable 66°F (18.9°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Isabel, South Dakota, with an average temperature ranging between max 78.6°F (25.9°C) and min 58.3°F (14.6°C). In Isabel, the average high-temperature in June increases from an enjoyable 66°F (18.9°C) in May to a moderately hot 78.6°F (25.9°C). Weather in June »
Weather in July
July in Isabel, South Dakota, is a hot summer month, with an average temperature varying between 87.3°F (30.7°C) and 66°F (18.9°C). Temperature readings reach their annual highs in July, averaging 87.3°F (30.7°C) and a minimum average of 66°F (18.9°C). For most parts of July, the heat index is computed to be a hot 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 Isabel, South Dakota, with an average temperature fluctuating between 64°F (17.8°C) and 84.7°F (29.3°C). Isabel experiences a minor change to a moderately hot 84.7°F (29.3°C) in average high-temperature during August, closely reflecting July. Weather in August »
Weather in September
September, the first month of the autumn in Isabel, is still a warm month, with temperature in the range of an average low of 56.3°F (13.5°C) and an average high of 75.4°F (24.1°C). With the onset of September, Isabel's average high-temperature adjusts, receding from August's 84.7°F (29.3°C) to a still warm 75.4°F (24.1°C). Weather in September »
Weather in October
October, the same as September, in Isabel, South Dakota, is another mild autumn month, with an average temperature ranging between max 56.7°F (13.7°C) and min 41.2°F (5.1°C). October marks a distinct drop in the average high-temperature, descending from September's moderately hot 75.4°F (24.1°C) to a moderate 56.7°F (13.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Isabel, South Dakota, with an average temperature fluctuating between 29.1°F (-1.6°C) and 43.3°F (6.3°C). The arrival of November corresponds with a reduction in the average high-temperature, down from October's refreshing 56.7°F (13.7°C) to a frosty 43.3°F (6.3°C). Weather in November »
Weather in December
The first month of the winter, December, is still a freezing cold month in Isabel, South Dakota, with temperature in the range of an average high of 28.2°F (-2.1°C) and an average low of 16.2°F (-8.8°C). A noticeable downshift in temperatures is seen as November gives way to December, with average highs moving from a chilly 43.3°F (6.3°C) to a subzero cold 28.2°F (-2.1°C). Weather in December »
Updated: Jul 28, 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 in Isabel?
With average high temperatures of 27°F (-2.8°C) and lows of 13.6°F (-10.2°C), January is the coldest month.
What is the most humid month?
January is the most humid month in Isabel, with an average relative humidity of 83%.
What is the driest month?
January is the month with the least rainfall. Rain falls for 3.3 days and accumulates 0.51" (13mm) of precipitation.
How many days does it rain?
In Isabel, during the entire year, the rain falls for 99.7 days and collects up to 16.06" (408mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall.
How many days does it snow in Isabel?
In Isabel, during the entire year, snow falls for 58.3 days and aggregates up to 22.95" (583mm) of snow.
What is the month with the least sunshine?
With an average of 4.8h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Isabel?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the snowiest month?
The month with the most snowfall is February, when snow falls for 12.2 days and typically aggregates up to 5.12" (130mm) of snow.
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 MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
What is the wettest month?
May is the month with the most rainfall. Rain falls for 14.7 days and accumulates 2.83" (72mm) of precipitation.
When it does not snow?
In Isabel, 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 36min of daylight.
What is the hottest time of year?
July, with an average high of 87.3°F (30.7°C) and a low of 66°F (18.9°C), signifies the warmest month of the year.
What month has the most sunshine in Isabel?
July has the most sunshine of the year, with an average of 11.5h of sunshine.
What is the month with the highest UV index?
With an average maximum UV index of 7, July is the month with the highest UV index.
What is the least humid month?
August and September, with an average relative humidity of 49%, are the least humid months.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 8h and 48min of daylight.
Average temperature
Isabel, SD
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (27°F).
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure
Isabel, SD
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.04"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:
29.9"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:
30.06"Hg - Average pressure in December:
30.14"Hg
The months with the highest atmospheric pressure are January and February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed
Isabel, SD
- Average wind speed in January:
11.3mph - Average wind speed in February:
10.4mph - Average wind speed in March:
11.2mph - Average wind speed in April:
12.2mph - Average wind speed in May:
11.6mph - Average wind speed in June:
11.1mph
- Average wind speed in July:
10.5mph - Average wind speed in August:
10.4mph - Average wind speed in September:
11.3mph - Average wind speed in October:
12.1mph - Average wind speed in November:
10.9mph - Average wind speed in December:
10.9mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest months (with the lowest average wind speed) are February and August (10.4mph).
Average humidity
Isabel, SD
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are August and September (49%).
Average rainfall
Isabel, SD
- Average rainfall in January:
0.51" - Average rainfall in February:
0.79" - Average rainfall in March:
1.1" - Average rainfall in April:
1.81" - Average rainfall in May:
2.83" - Average rainfall in June:
2.28"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.26" - Average rainfall in September:
0.87" - Average rainfall in October:
1.34" - Average rainfall in November:
0.55" - Average rainfall in December:
0.83"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days
Isabel, SD
- Average rainfall days in January:
3.3 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
8 days - Average rainfall days in April:
12.3 days - Average rainfall days in May:
14.7 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
10.8 days - Average rainfall days in August:
10.8 days - Average rainfall days in September:
7.9 days - Average rainfall days in October:
7.4 days - Average rainfall days in November:
3.4 days - Average rainfall days in December:
4 days
The month with the highest number of rainy days is May (14.7 days).
The months with the least rainy days are January and February (3.3 days).
Average snowfall
Isabel, SD
- Average snowfall in January:
3.07" - Average snowfall in February:
5.12" - Average snowfall in March:
4.13" - Average snowfall in April:
3.39" - Average snowfall in May:
0.79" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Isabel, SD
- Average snowfall days in January:
12.3 days - Average snowfall days in February:
12.2 days - Average snowfall days in March:
9.3 days - Average snowfall days in April:
5.3 days - Average snowfall days in May:
0.9 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:
2.5 days - Average snowfall days in November:
5.4 days - Average snowfall days in December:
10.4 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Isabel, 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:
4h and 5min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 3min - Average sunshine in June:
10h and 5min
- Average sunshine in July:
11h and 3min - Average sunshine in August:
11h and 2min - Average sunshine in September:
9h and 4min - Average sunshine in October:
6h and 5min - Average sunshine in November:
5h and 5min - Average sunshine in December:
5h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days
Isabel, SD
- Average sunshine days in January:
16.4 days - Average sunshine days in February:
15.2 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
12.4 days - Average sunshine days in May:
13.6 days - Average sunshine days in June:
13.4 days
- Average sunshine days in July:
16.6 days - Average sunshine days in August:
17 days - Average sunshine days in September:
20.4 days - Average sunshine days in October:
19.9 days - Average sunshine days in November:
20.1 days - Average sunshine days in December:
17.3 days
The month with the most sunshine days is September (20.4 days).
The month with the least sunshine days is April (12.4 days).
Average UV index
Isabel, SD
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Isabel, SD
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 19).
Average visibility
Isabel, 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).
Isabel, South Dakota, USA
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