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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 Napa Junction, South Dakota, is a freezing cold winter month, with temperature in the range of an average low of 12.9°F (-10.6°C) and an average high of 26.8°F (-2.9°C). Napa Junction's coldest weather arrives in January, when temperatures average a high of 26.8°F (-2.9°C) and a low of 12.9°F (-10.6°C). Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Napa Junction, South Dakota, with an average temperature fluctuating between 16.3°F (-8.7°C) and 30.6°F (-0.8°C). The beginning of February reveals an average high-temperature of a still subzero cold 30.6°F (-0.8°C), showing minimal deviation from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Napa Junction, is a frosty month, with temperature in the range of an average low of 30.2°F (-1°C) and an average high of 46.9°F (8.3°C). Napa Junction's weather experiences a significant temperature rise with the arrival of March, soaring from a freezing cold 30.6°F (-0.8°C) in February to a frosty 46.9°F (8.3°C). Weather in March »
Weather in April
April is a mild spring month in Napa Junction, South Dakota, with an average temperature varying between 40.1°F (4.5°C) and 57.9°F (14.4°C). April brings an increase in the average high-temperature, progressing from a chilly 46.9°F (8.3°C) in March to a mild 57.9°F (14.4°C). Weather in April »
Weather in May
May, the last month of the spring in Napa Junction, is an agreeable month, with an average temperature fluctuating between 69.1°F (20.6°C) and 50.9°F (10.5°C). An upsurge in temperatures occurs as April gives way to May, with average highs shifting from a refreshing 57.9°F (14.4°C) to a pleasant 69.1°F (20.6°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Napa Junction, South Dakota, with an average temperature ranging between min 61.7°F (16.5°C) and max 79.7°F (26.5°C). With the onset of June, Napa Junction experiences a temperature shift, with the average high-temperature moving from an agreeable 69.1°F (20.6°C) in May to a moderately hot 79.7°F (26.5°C). Weather in June »
Weather in July
July, like June, in Napa Junction, South Dakota, is another warm summer month, with temperature in the range of an average high of 84.9°F (29.4°C) and an average low of 64.9°F (18.3°C). July is the month that records the highest temperatures, with averages ranging from a high of 84.9°F (29.4°C) to a low of 64.9°F (18.3°C). July's average 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 Napa Junction, is another warm month, with an average temperature varying between 61.3°F (16.3°C) and 83.3°F (28.5°C). As Napa Junction welcomes August, the average high-temperature records at a still moderately hot 83.3°F (28.5°C), marking an insignificant deviation from the prior month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Napa Junction, South Dakota, with temperature in the range of an average low of 55°F (12.8°C) and an average high of 76.1°F (24.5°C). September's arrival aligns with a minor decrease in average high-temperatures, from August's warm 83.3°F (28.5°C) to a still moderately hot 76.1°F (24.5°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Napa Junction, South Dakota, with an average temperature fluctuating between 59.4°F (15.2°C) and 42.6°F (5.9°C). October brings with it a considerable temperature decrease, with average high-temperatures dropping from September's moderately hot 76.1°F (24.5°C) to a moderate 59.4°F (15.2°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Napa Junction, South Dakota, with an average temperature fluctuating between 45.9°F (7.7°C) and 30.7°F (-0.7°C). The onset of November brings a small change in high-temperatures, falling from a moderate 59.4°F (15.2°C) in October to a chilly 45.9°F (7.7°C). Weather in November »
Weather in December
December, the first month of the winter in Napa Junction, is also a subzero cold month, with an average temperature fluctuating between 18°F (-7.8°C) and 29.8°F (-1.2°C). As December arrives, Napa Junction's weather displays a notable decrease in high-temperatures, falling from November's frosty 45.9°F (7.7°C) to a subzero cold 29.8°F (-1.2°C). Weather in December »
Updated: Jun 29, 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 is the coldest month?
January is the coldest month, with an average high-temperature of 26.8°F (-2.9°C) and an average low-temperature of 12.9°F (-10.6°C).
What is the most humid month in Napa Junction?
The most humid month is January, with an average relative humidity of 85%.
How many days does it rain?
Throughout the year, there are 117.9 rainfall days, and 21.93" (557mm) of precipitation is accumulated.
When does it snow?
January through May, October through December are months with snowfall.
How many days does it snow?
In Napa Junction, during the entire year, snow falls for 37.4 days and aggregates up to 14.45" (367mm) of snow.
What is the month with the least sunshine?
With an average of 4.4h of sunshine, January has the least sunshine of the year.
When is the lowest UV index?
January is the month with the lowest UV index, with an average maximum UV index of 1.
What is the driest month?
February is the month with the least rainfall. Rain falls for 2.3 days and accumulates 0.59" (15mm) of precipitation.
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 wettest month?
May is the month with the most rainfall. Rain falls for 16.9 days and accumulates 3.78" (96mm) of precipitation.
When it does not snow in Napa Junction?
In Napa Junction, snow does not fall in June through September.
When are the longest days?
The month with the longest days is June, with an average of 15h and 18min of daylight.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What is the warmest month?
July, having an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 64.9°F (18.3°C), is the warmest month.
What month has the most sunshine?
With an average of 10.8h of sunshine, July has the most sunshine of the year.
What is the least humid month?
October is the least humid month, with an average relative humidity of 64%.
What is the snowiest month?
The month with the most snowfall is December, when snow falls for 8.1 days and typically aggregates up to 2.95" (75mm) of snow.
What is the month with the shortest days?
With an average of 9h and 6min of daylight, December has the shortest days of the year.
Average temperature
Napa Junction, SD
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (26.8°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).
Average pressure
Napa Junction, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.85"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed
Napa Junction, SD
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.8mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.6mph - Average wind speed in June:
8.8mph
- Average wind speed in July:
7.9mph - Average wind speed in August:
8.2mph - Average wind speed in September:
9.2mph - Average wind speed in October:
10.3mph - Average wind speed in November:
10.2mph - Average wind speed in December:
10.3mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).
Average humidity
Napa Junction, SD
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (64%).
Average rainfall
Napa Junction, SD
- Average rainfall in January:
0.67" - Average rainfall in February:
0.59" - Average rainfall in March:
1.34" - Average rainfall in April:
2.4" - Average rainfall in May:
3.78" - Average rainfall in June:
3.31"
- Average rainfall in July:
2.24" - Average rainfall in August:
2.24" - Average rainfall in September:
1.81" - Average rainfall in October:
1.73" - Average rainfall in November:
0.63" - Average rainfall in December:
1.18"
The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is February (0.59").
Average rainfall days
Napa Junction, SD
- Average rainfall days in January:
3.4 days - Average rainfall days in February:
2.3 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
12.2 days - Average rainfall days in May:
16.9 days - Average rainfall days in June:
17.4 days
- Average rainfall days in July:
13.4 days - Average rainfall days in August:
14.2 days - Average rainfall days in September:
11.6 days - Average rainfall days in October:
9.3 days - Average rainfall days in November:
4.7 days - Average rainfall days in December:
3.7 days
The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (2.3 days).
Average snowfall
Napa Junction, SD
- Average snowfall in January:
2.6" - Average snowfall in February:
2.52" - Average snowfall in March:
2.09" - Average snowfall in April:
2.13" - Average snowfall in May:
0.31" - Average snowfall in June:
0"
The month with the highest snowfall is December (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Napa Junction, SD
- Average snowfall days in January:
9.7 days - Average snowfall days in February:
7.8 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
2.4 days - Average snowfall days in May:
0.2 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:
0.8 days - Average snowfall days in November:
3.1 days - Average snowfall days in December:
8.1 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Napa Junction, SD
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 5min - 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:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
5h and 2min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 5min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 5min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Napa Junction, SD
- Average sunshine days in January:
19.3 days - Average sunshine days in February:
17.8 days - Average sunshine days in March:
16.7 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
9.3 days
- Average sunshine days in July:
13 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
21.5 days - Average sunshine days in December:
21.3 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (9.3 days).
Average UV index
Napa Junction, SD
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Napa Junction, SD
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility
Napa Junction, 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).
Napa Junction, South Dakota, USA
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