Climate and monthly weather forecastArmour, SD
Climate and monthly weather forecast
The climate of Armour
Armour, South Dakota, lying within the vast expanse of continental USA, is characterized by a humid continental climate, denoted as Dfa according to the Köppen climate classification. This essentially translates to a region with no dry season, featuring hot summers and typically high humidity throughout the year.The highest average temperatures reach a peak 86.5°F (30.3°C) in July, before plunging to a frigid 13.6°F (-10.2°C) in the colder months of January, illustrating the significant temperature shifts across different periods of the year. Humidity tends to vary seasonally as well, with a high average relative humidity of 84% in January, decreasing gradually to a low of 62% in October.
Rainfall is another parameter that sees significant fluctuation throughout the 12-month period, varying from a scant 0.31" (8mm) in the month of February up to a hefty 2.72" (69mm) in May. Notably, the number of rainfall days also peaks during May with 15.3 days, descending to a mere 2.9 days in January.
Interestingly, in the winter months, Armour witnesses considerable snowfall, with January experiencing the maximum at 1.93" (49mm) over 8.2 days. This is in stark contrast to the summer months where snowfall is virtually non-existent. Remarkably, daylight hours vary between 15.4 hours in June to a mere 9 hours in the winter months of December.
The best time to visit Armour
The optimum time to visit Armour would depend heavily upon the prospective visitor's suite of preferred weather conditions. With this in mind, it would be highly likely a traveller seeking comfortable temperatures that are neither too hot nor cold, the months between May and August would be ideal, with temperatures averaging between 57.7°F (14.3°C) and 86.5°F (30.3°C).For those who seek to make the most out of their daylight hours, a trip between May and June which enjoy a generous 14.7 to 15.4 hours of daylight respectively may be in order. However, those with a predilection for drier conditions might want to consider planning their visit around February, when the average rainfall settles to a mere 0.31" (8mm) over a span of 3.6 days.
The worst time to visit Armour
Conversely, the least ideal time to pay a visit to Armour, it could be suggested that the very frigid months of January and December, when temperatures plummet to a freezing 13.6°F (-10.2°C) to 18.3°F (-7.6°C) might be avoided unless one is particularly fond of the cold. Additionally, individuals averse to high humidity levels should consider steering clear of January, where humidity soars to an relatively high 84%.Given the frequency of rainfall, the month of May, boasting an average rainfall of 2.72" (69mm) across 15.3 days, might not be conducive for tourists seeking to avoid getting drenched.
Spring weather in Armour
Spring in Armour generally spans from March to May, with temperatures scaling up from a comfortable 46.9°F (8.3°C) to 68.5°F (20.3°C). However, it's worth noting that Armour experiences its highest rainfall during spring, particularly in May, with a substantial average of 2.72" (69mm) across 15.3 days.Summer weather in Armour
Summers in Armour are appropriately hot as they run from June to August, with temperatures peaking at a high of 86.5°F (30.3°C). Although significant rainfall recedes after spring, the summer months still see fairly high precipitation, with June experiencing an average of 2.28" (58mm) of rain.Autumn weather in Armour
Autumn in Armour, stretching from September through November, presents a considerable cooling down from the searing heat of the summer. During this season, average temperatures descend from 76.3°F (24.6°C) in September to a much cooler 46.4°F (8°C) by November. While November sees a decrease in rainfall to 0.35" (9mm), it does experience a small increase in snowfall of 0.91" (23mm).Winter weather in Armour
Winter in Armour, spanning from December to February, is characterized by freezing temperatures averaging between 13.6°F (-10.2°C) and 31.5°F (-0.3°C). Snowfall is a common phenomenon in this period, especially in January, which sees approximately 1.93" (49mm), making it the month with the maximum snowfall. The number of daylight hours also takes a dip during winters, averaging around 9 to 9.7 hours per day.Weather in January
January in Armour, South Dakota, provides the city's inhabitants with a bracing start to the year. The weather presents consistent snow conditions, topped off by an average high temperature of 27.3°F (-2.6°C). Days are cloudier with an increased percentage of cloud cover and markedly reduced sunlight hours. Weather in January »Weather in February
With February arrives a slight uptick in temperature, however, the Armour weather remains distinctly wintery. The average high climbs to 31.5°F (-0.3°C), while snowfall reduces slightly, however, it's still pretty much a permanent fixture. Weather in February »Weather in March
The weather in March spots the first spark of transition in Armour, moving towards the refreshing breath of spring. Noteworthy is an increase in the average high temperature to 46.9°F (8.3°C) and a substantial reduction in snowfall. Weather in March »Weather in April
Armour's weather in April witnesses a definitive swing towards spring. Temperatures rise steadily with the average high now 57.7°F (14.3°C) and snowfall shifts to rainfall, marking the end of winter's reign. The tide of nature turns towards new growth, blanketing the entire city in green. Weather in April »Weather in May
May's weather encourages the bloom of spring in Armour with an appreciable warming of daily temperatures. Marked is the highest precipitation record, 2.72" (69mm), indicating a rainy month. The city vibrates with colors, courtesy of the many blooming flowers dotting gardens and roadsides. Weather in May »Weather in June
The gradual build-up of temperature peaks in the arrival of summer in Armour in June. Rising temperatures and ample sunlight marks the beginning of residents participating in warm-weather pursuits. The lushness of May spawns into June, creating vibrant backdrops throughout city parks and neighborhoods. Weather in June »Weather in July
According to the data, July is the warmest month in Armour, with an average high temperature reaching 86.5°F (30.3°C). With this substantial increase in temperature, it is the quintessential summer month. Concerts, festivals, and barbeques become common affairs under the city's blue summer skies. Weather in July »Weather in August
August weather in Armour brings with it a slight easing from July's peak summer conditions. The heat lessens slightly; however, the city continues to luxuriate in summer glory. Longer daylight hours allow for plentiful outdoor summer activities, from serene morning walks to leisurely evening gatherings. Weather in August »Weather in September
The weather of September nudges Armour gently towards the end of summer and the beginning of fall. The shift becomes noticeable with temperatures easing down and the environment taking on a softer hue. The landscapes gradually start transitioning from vibrant summer colors to the more mellow ochre palette of the fall. Weather in September »Weather in October
October in Armour is when the full swing of fall weather becomes palpable. The temperature cools further, creating the perfect stage for the seasonal riot of fall colors. The city turns into an artist's palette, splashed with shades of red, orange, and gold. Weather in October »Weather in November
November in Armour is a month of transition yet again, this time marking the advent of winter. Temperatures drop with an average high of 46.4°F (8°C), inviting the city's inhabitants to cozy up. The fall's colors and warmth gradually diminish, replaced by the initial crispness of the impending winter. Weather in November »Weather in December
With the arrival of December, Armour firmly descends into winter mode. The weather turns colder turning the city into a winter wonderland. Traces of snow become more frequent, lending the city a distinctive holiday charm. As the temperatures plummet, the number of cozy evenings in front of the fireplace rise. 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
In Armour, South Dakota, the average lowest temperatures are observed in January, with a high of 27.3°F (-2.6°C) and a low of 13.6°F (-10.2°C).
The most humid month is January, with an average relative humidity of 84%.
In Armour, South Dakota, during the entire year, the rain falls for 104.1 days and collects up to 14.29" (363mm) of precipitation.
Months with snowfall in Armour are January through April, October through December.
The months with the most snowfall in Armour are January and March, with an average 1.93" (49mm) of accumulated snow.
Throughout the year, in Armour, South Dakota, there are 32.8 snowfall days, and 8.35" (212mm) of snow is accumulated.
With an average of 4.7h of sunshine, January has the least sunshine of the year.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Armour.
February is the month with the least rainfall in Armour. Rain falls for 3.6 days and accumulates 0.31" (8mm) of precipitation.
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.
The month with the most rainfall in Armour is May, when the rain falls for 15.3 days and typically aggregates up to 2.72" (69mm) of precipitation.
In Armour, snow does not fall in May through September.
June has the longest days of the year in Armour, South Dakota, with an average of 15h and 18min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index in Armour, South Dakota.
Armour, South Dakota, registers the average highest temperatures during July, with peaks of 86.5°F (30.3°C) and lows of 65.7°F (18.7°C).
With an average of 11.1h of sunshine, July has the most sunshine of the year in Armour.
With an average relative humidity of 62%, October is the least humid month in Armour, South Dakota.
December has the shortest days of the year, with an average of 9h and 0min of daylight.
Average temperature
Armour, SD
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (27.3°F).
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure
Armour, 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:
29.91"Hg - Average pressure in June:
29.85"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.06"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
Armour, SD
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.7mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.6mph - Average wind speed in June:
8.9mph
- Average wind speed in July:
8.3mph - Average wind speed in August:
8.5mph - Average wind speed in September:
9.4mph - Average wind speed in October:
10.3mph - Average wind speed in November:
10.1mph - 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 (8.3mph).
Average humidity
Armour, SD
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (62%).
Average rainfall
Armour, SD
- Average rainfall in January:
0.39" - Average rainfall in February:
0.31" - Average rainfall in March:
0.98" - Average rainfall in April:
1.42" - Average rainfall in May:
2.72" - Average rainfall in June:
2.28"
- Average rainfall in July:
1.73" - Average rainfall in August:
1.46" - Average rainfall in September:
1.02" - Average rainfall in October:
1.02" - Average rainfall in November:
0.35" - Average rainfall in December:
0.59"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is February (0.31").
Average rainfall days
Armour, SD
- Average rainfall days in January:
2.9 days - Average rainfall days in February:
3.6 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
10.8 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
14.7 days
- Average rainfall days in July:
12.4 days - Average rainfall days in August:
11.3 days - Average rainfall days in September:
9.4 days - Average rainfall days in October:
7.7 days - Average rainfall days in November:
4.1 days - Average rainfall days in December:
3.1 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (2.9 days).
Average snowfall
Armour, SD
The months with the highest snowfall are January and March (1.93").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Armour, SD
- Average snowfall days in January:
8.2 days - Average snowfall days in February:
7.5 days - Average snowfall days in March:
5.2 days - Average snowfall days in April:
1.8 days - Average snowfall days in May:
0 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:
2.8 days - Average snowfall days in December:
6.5 days
The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Armour, SD
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 0min
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 0min).
- Average sunshine in January:
4h and 42min - Average sunshine in February:
5h and 48min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 6min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
11h and 6min - Average sunshine in August:
10h and 30min - Average sunshine in September:
8h and 54min - Average sunshine in October:
6h and 36min - Average sunshine in November:
5h and 54min - Average sunshine in December:
4h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Armour, SD
- Average sunshine days in January:
20.9 days - Average sunshine days in February:
19.5 days - Average sunshine days in March:
18.3 days - Average sunshine days in April:
15.4 days - Average sunshine days in May:
13.3 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
14.6 days - Average sunshine days in August:
16.7 days - Average sunshine days in September:
18.4 days - Average sunshine days in October:
20.7 days - Average sunshine days in November:
23.4 days - Average sunshine days in December:
22.5 days
The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is June (12.3 days).
Average UV index
Armour, 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, November and December (UV index 2).
Average cloud cover
Armour, SD
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 23).
Average visibility
Armour, 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).
