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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 Armstrong, Iowa, is a freezing cold winter month, with an average temperature varying between 22.5°F (-5.3°C) and 9.9°F (-12.3°C). The month of January, characterized by an average high of 22.5°F (-5.3°C) and a low of 9.9°F (-12.3°C), is recognized as the coldest. Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Armstrong, Iowa, with an average temperature fluctuating between 26.2°F (-3.2°C) and 12.9°F (-10.6°C). February welcomes an average high-temperature of a still freezing cold 26.2°F (-3.2°C), not much different from the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Armstrong, is a wintry month, with an average temperature ranging between min 27.7°F (-2.4°C) and max 41.7°F (5.4°C). The onset of March marks a clear increase in the average high-temperature, escalating from a freezing cold 26.2°F (-3.2°C) in February to a wintry 41.7°F (5.4°C). Weather in March »
Weather in April
April is a cool spring month in Armstrong, Iowa, with an average temperature varying between 39.7°F (4.3°C) and 55°F (12.8°C). April's onset witnesses a shift in the average high-temperature, moving from a wintry 41.7°F (5.4°C) in March to a cool 55°F (12.8°C). Weather in April »
Weather in May
May, the last month of the spring in Armstrong, is a pleasant month, with an average temperature fluctuating between 51.4°F (10.8°C) and 68°F (20°C). The shift from April to May sees an increase in the average high-temperature, transitioning from a cool 55°F (12.8°C) to a pleasant 68°F (20°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Armstrong, Iowa, with an average temperature fluctuating between 61°F (16.1°C) and 77.2°F (25.1°C). Observing a rise in June, the average high-temperature goes from May's agreeable 68°F (20°C) to a warm 77.2°F (25.1°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Armstrong, Iowa, with an average temperature ranging between max 80.2°F (26.8°C) and min 62.6°F (17°C). July is Armstrong's warmest month, registering average high temperatures of 80.2°F (26.8°C) and lows of 62.6°F (17°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Armstrong, Iowa, with an average temperature fluctuating between 59.5°F (15.3°C) and 78.1°F (25.6°C). With the start of August, Armstrong measures an average high-temperature of a still moderately hot 78.1°F (25.6°C), not significantly differing from July's 80.2°F (26.8°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Armstrong, Iowa, with an average temperature varying between 53.8°F (12.1°C) and 72.7°F (22.6°C). September brings a slight decrease in the average high-temperature, shifting from a warm 78.1°F (25.6°C) in August to a pleasant 72.7°F (22.6°C). Weather in September »
Weather in October
October, the same as September, in Armstrong, Iowa, is another refreshing autumn month, with an average temperature varying between 42.3°F (5.7°C) and 57°F (13.9°C). October signals a significant shift in the average high-temperature, falling from September's pleasant 72.7°F (22.6°C) to a mild 57°F (13.9°C). Weather in October »
Weather in November
November, the last month of the autumn in Armstrong, is also an icy month, with an average temperature fluctuating between 29.7°F (-1.3°C) and 42.4°F (5.8°C). Armstrong's weather undergoes a significant change with the arrival of November, as the average high-temperature drops from a moderate 57°F (13.9°C) in October to a cold 42.4°F (5.8°C). Weather in November »
Weather in December
December, the first month of the winter in Armstrong, is also a subzero cold month, with an average temperature ranging between min 16.5°F (-8.6°C) and max 27.3°F (-2.6°C). December's arrival is marked by a significant decrease in the average high-temperature, moving from a wintry 42.4°F (5.8°C) in November to a subzero cold 27.3°F (-2.6°C). Weather in December »
Updated: Jul 11, 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?
January stands out as Armstrong's coldest month, with an average high-temperature of 22.5°F (-5.3°C) and a low-temperature of 9.9°F (-12.3°C).
What is the most humid month?
January is the most humid month, with an average relative humidity of 88%.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 2.9 days and typically collects 0.87" (22mm) of precipitation.
How much does it rain?
In Armstrong, during the entire year, the rain falls for 123.7 days and collects up to 23.66" (601mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall.
How many days does it snow?
Throughout the year, there are 48.8 snowfall days, and 19.76" (502mm) of snow is accumulated.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.9h of sunshine.
When is the lowest UV index?
January and February, with an average maximum UV index of 1, are months with the lowest UV index.
What is the snowiest month?
February is the month with the most snowfall in Armstrong. Snow falls for 10 days and accumulates 4.8" (122mm) 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 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?
June is the month with the most rainfall. Rain falls for 18 days and accumulates 3.7" (94mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 24min of daylight.
What are the months with the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What part of the year is the hottest?
July is the month that records the highest temperatures, with averages ranging from a high of 80.2°F (26.8°C) to a low of 62.6°F (17°C).
What month has the most sunshine?
July has the most sunshine of the year, with an average of 10.1h of sunshine.
What is the least humid month?
With an average relative humidity of 68%, October is the least humid month.
What is the month with the shortest days?
With an average of 9h and 0min of daylight, December has the shortest days of the year.
Average temperature
Armstrong, IA
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (22.5°F).
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure
Armstrong, IA
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.12"Hg
The months with the highest atmospheric pressure are January and February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Armstrong, IA
- Average wind speed in January:
11.2mph - Average wind speed in February:
11.1mph - 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:
8.6mph
- Average wind speed in July:
7.6mph - Average wind speed in August:
7.7mph - Average wind speed in September:
8.9mph - Average wind speed in October:
10.4mph - Average wind speed in November:
10.9mph - Average wind speed in December:
10.7mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity
Armstrong, IA
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (68%).
Average rainfall
Armstrong, IA
- Average rainfall in January:
0.87" - Average rainfall in February:
0.98" - Average rainfall in March:
1.65" - Average rainfall in April:
2.6" - Average rainfall in May:
3.27" - Average rainfall in June:
3.7"
- Average rainfall in July:
2.24" - Average rainfall in August:
1.93" - Average rainfall in September:
2.28" - Average rainfall in October:
1.81" - Average rainfall in November:
1.02" - Average rainfall in December:
1.3"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days
Armstrong, IA
- Average rainfall days in January:
2.9 days - Average rainfall days in February:
2.3 days - Average rainfall days in March:
9.5 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
16.2 days - Average rainfall days in June:
18 days
- Average rainfall days in July:
14.3 days - Average rainfall days in August:
13.5 days - Average rainfall days in September:
11.7 days - Average rainfall days in October:
10.7 days - Average rainfall days in November:
6.4 days - Average rainfall days in December:
4.4 days
The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is February (2.3 days).
Average snowfall
Armstrong, IA
The month with the highest snowfall is February (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Armstrong, IA
- Average snowfall days in January:
11.3 days - Average snowfall days in February:
10 days - Average snowfall days in March:
6.7 days - Average snowfall days in April:
2.6 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:
1.8 days - Average snowfall days in November:
5 days - Average snowfall days in December:
11.1 days
The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Armstrong, IA
- 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 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 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 4min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
9h and 4min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Armstrong, IA
- Average sunshine days in January:
18 days - Average sunshine days in February:
16.5 days - Average sunshine days in March:
15.4 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
13 days - Average sunshine days in June:
10.1 days
- Average sunshine days in July:
13.5 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
16.8 days - Average sunshine days in October:
17.4 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
17.1 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (10.1 days).
Average UV index
Armstrong, IA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover
Armstrong, IA
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are July and September (Cloud cover 31).
Average visibility
Armstrong, IA
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).
Armstrong, Iowa, USA
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