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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 another subzero cold winter month in Chelsea, South Dakota, with temperature in the range of an average low of 6.3°F (-14.3°C) and an average high of 20.7°F (-6.3°C). Chelsea's coldest weather arrives in January, when temperatures average a high of 20.7°F (-6.3°C) and a low of 6.3°F (-14.3°C). Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Chelsea, South Dakota, with an average temperature ranging between max 23.7°F (-4.6°C) and min 9.1°F (-12.7°C). The arrival of February coincides with an average high-temperature of a still subzero cold 23.7°F (-4.6°C), indicating a minimal shift from January's 20.7°F (-6.3°C). Weather in February »
Weather in March
March, the first month of the spring in Chelsea, is an icy month, with an average temperature varying between 39.7°F (4.3°C) and 24.8°F (-4°C). Chelsea sees a considerable increase in average high-temperatures during March, surging from a subzero cold 23.7°F (-4.6°C) in February to an icy 39.7°F (4.3°C). Weather in March »
Weather in April
April is a fresh spring month in Chelsea, South Dakota, with an average temperature fluctuating between 36.9°F (2.7°C) and 54.1°F (12.3°C). As March transitions into April, Chelsea sees a clear rise in the average high-temperature, escalating from an 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 a refreshing month in Chelsea, South Dakota, with an average temperature fluctuating between 48.2°F (9°C) and 66.7°F (19.3°C). Chelsea in May sees a temperature change, with average high-temperatures moving from a fresh 54.1°F (12.3°C) in April to a comfortable 66.7°F (19.3°C). Weather in May »
Weather in June
June, the first month of the summer in Chelsea, is a moderately hot month, with an average temperature fluctuating between 57.6°F (14.2°C) and 76.8°F (24.9°C). With the onset of June, Chelsea's average high-temperature experiences a rise, moving from May's enjoyable 66.7°F (19.3°C) to a moderately hot 76.8°F (24.9°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Chelsea, South Dakota, with an average temperature fluctuating between 84.7°F (29.3°C) and 63.1°F (17.3°C). July is the warmest month of the year, registering average temperatures as high as 84.7°F (29.3°C) and as low as 63.1°F (17.3°C). Throughout 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 another warm month in Chelsea, South Dakota, with an average temperature ranging between max 83.1°F (28.4°C) and min 61°F (16.1°C). The arrival of August sees a recorded average high-temperature of a still moderately hot 83.1°F (28.4°C), showing little divergence from the previous month's conditions. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Chelsea, South Dakota, with an average temperature ranging between min 52.9°F (11.6°C) and max 74.3°F (23.5°C). September's onset brings a negligible change in high-temperatures, falling from a warm 83.1°F (28.4°C) in August to a still moderately hot 74.3°F (23.5°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Chelsea, South Dakota, with an average temperature ranging between max 56.3°F (13.5°C) and min 40.1°F (4.5°C). Chelsea's transition into October marks a considerable drop in the average high-temperature, moving down from a warm 74.3°F (23.5°C) in September to a mild 56.3°F (13.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Chelsea, is also an icy month, with an average temperature ranging between min 26.8°F (-2.9°C) and max 41.7°F (5.4°C). November's onset witnesses a marked shift in the average high-temperature, moving from a moderate 56.3°F (13.5°C) in October to a cold 41.7°F (5.4°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Chelsea, South Dakota, with temperature in the range of an average low of 12.7°F (-10.7°C) and an average high of 25°F (-3.9°C). As Chelsea transitions into December, the average high-temperature shows a marked reduction, decreasing from an icy 41.7°F (5.4°C) in November to a freezing cold 25°F (-3.9°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
What time of the year is the coldest in Chelsea?
With its average high temperature of 20.7°F (-6.3°C) and a low of 6.3°F (-14.3°C), January is regarded as the coldest month.
What is the most humid month in Chelsea?
With an average relative humidity of 88%, January is the most humid month in Chelsea.
What is the driest month in Chelsea?
The month with the least rainfall in Chelsea, South Dakota, is January, when the rain falls for 3 days and typically collects 0.59" (15mm) of precipitation.
How many days does it rain in Chelsea?
In Chelsea, South Dakota, during the entire year, the rain falls for 97.2 days and collects up to 18.35" (466mm) of precipitation.
When does it snow in Chelsea?
January through May, October through December are months with snowfall in Chelsea.
What is the snowiest month in Chelsea?
January is the month with the most snowfall in Chelsea, South Dakota. Snow falls for 13 days and accumulates 3.82" (97mm) of snow.
How much does it snow in Chelsea?
Throughout the year, in Chelsea, South Dakota, there are 54.8 snowfall days, and 19.13" (486mm) of snow is accumulated.
What is the month with the least sunshine in Chelsea?
January has the least sunshine of the year, with an average of 3.9h of sunshine.
What are the months with the lowest UV index in Chelsea?
January, February and November, with an average maximum UV index of 1, are months with the lowest UV index.
When is Daylight Saving Time (DST) in Chelsea?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Chelsea, 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 in Chelsea?
The month with the most rainfall in Chelsea, South Dakota, is June, when the rain falls for 15 days and typically aggregates up to 3.46" (88mm) of precipitation.
When it does not snow in Chelsea?
In Chelsea, South Dakota, snow does not fall in June through September.
When are the longest days in Chelsea?
The month with the longest days in Chelsea is June, with an average of 15h and 36min of daylight.
When is the highest UV index in Chelsea?
The months with the highest UV index in Chelsea are June through August, with an average maximum UV index of 6.
What month is the hottest in Chelsea?
The month of July sees the average highest temperatures, reaching 84.7°F (29.3°C) at the peak and 63.1°F (17.3°C) at the low.
What month has the most sunshine in Chelsea?
With an average of 11.1h of sunshine, July has the most sunshine of the year.
What is the least humid month in Chelsea?
August and September, with an average relative humidity of 60%, are the least humid months.
What is the month with the shortest days in Chelsea?
With an average of 8h and 48min of daylight, December has the shortest days of the year.
Average temperature
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 4min
- 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:
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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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).
Chelsea, South Dakota, USA
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