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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, Illinois, is another subzero cold winter month, with an average temperature fluctuating between 31.5°F (-0.3°C) and 19.8°F (-6.8°C). January is the coldest month, exhibiting average temperatures of 31.5°F (-0.3°C) at the peak and 19.8°F (-6.8°C) at the base. Weather in January »
Weather in February
February, the last month of the winter in Armstrong, is a cold month, with an average temperature fluctuating between 23.4°F (-4.8°C) and 36°F (2.2°C). The unfolding of February shows an average high-temperature of a wintry 36°F (2.2°C), indicating a slight variance from January's 31.5°F (-0.3°C). Weather in February »
Weather in March
March, the first month of the spring in Armstrong, is a frosty month, with an average temperature ranging between min 34.3°F (1.3°C) and max 48.9°F (9.4°C). As February transitions into March, Armstrong sees a rise in the average high-temperature, moving from a cold 36°F (2.2°C) to a frosty 48.9°F (9.4°C). Weather in March »
Weather in April
April in Armstrong, Illinois, is a mild spring month, with an average temperature ranging between min 44.6°F (7°C) and max 60.4°F (15.8°C). April's arrival sees a rise in the average high-temperature, jumping from March's chilly 48.9°F (9.4°C) to a moderate 60.4°F (15.8°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Armstrong, Illinois, with an average temperature fluctuating between 55°F (12.8°C) and 71.8°F (22.1°C). Armstrong's May weather shows an increase in high-temperatures, moving from April's refreshing 60.4°F (15.8°C) to an agreeable 71.8°F (22.1°C). Weather in May »
Weather in June
June, the first month of the summer in Armstrong, is a warm month, with temperature in the range of an average high of 79.5°F (26.4°C) and an average low of 63.1°F (17.3°C). June's onset brings a subtle temperature rise, moving from an agreeable 71.8°F (22.1°C) in May to a moderately hot 79.5°F (26.4°C). Weather in June »
Weather in July
July, like June, in Armstrong, Illinois, is a moderately hot summer month, with an average temperature ranging between min 64.4°F (18°C) and max 81.1°F (27.3°C). July is the month that records the highest temperatures, with averages ranging from a high of 81.1°F (27.3°C) to a low of 64.4°F (18°C). July's average heat index is computed to be a tropical 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Armstrong, is also a moderately hot month, with an average temperature fluctuating between 63°F (17.2°C) and 80.2°F (26.8°C). The advent of August brings an average high-temperature of a still warm 80.2°F (26.8°C), almost identical to the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Armstrong, is still a warm month, with an average temperature fluctuating between 75.6°F (24.2°C) and 57.6°F (14.2°C). The beginning of September records an average high-temperature of a still warm 75.6°F (24.2°C), marking a negligible difference from August's 80.2°F (26.8°C). Weather in September »
Weather in October
October, like September, in Armstrong, Illinois, is another refreshing autumn month, with temperature in the range of an average low of 46.9°F (8.3°C) and an average high of 62.8°F (17.1°C). Onset of October comes with a temperature decline, the average high falling from a warm 75.6°F (24.2°C) in September to an enjoyable 62.8°F (17.1°C). Weather in October »
Weather in November
November, the last month of the autumn in Armstrong, is also a frosty month, with an average temperature fluctuating between 48.4°F (9.1°C) and 35.4°F (1.9°C). The shift into November is marked by a noticeable reduction in the average high-temperature, decreasing from October's refreshing 62.8°F (17.1°C) to a frosty 48.4°F (9.1°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Armstrong, Illinois, with an average temperature fluctuating between 37.6°F (3.1°C) and 27.3°F (-2.6°C). In December, the meteorological conditions alter, with the average high-temperature shifting from a chilly 48.4°F (9.1°C) in November to an icy 37.6°F (3.1°C). Weather in December »
Updated: Aug 20, 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 month is the coldest?
Armstrong's January weather, with an average high temperature of 31.5°F (-0.3°C) and an average low temperature of 19.8°F (-6.8°C), tends to be the coldest of the year.
How many days does it rain?
Throughout the year, there are 146.3 rainfall days, and 22.76" (578mm) of precipitation is accumulated.
When does it snow?
January through April, November and December are months with snowfall.
How many days does it snow?
Throughout the year, there are 34.2 snowfall days, and 7.8" (198mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 3.9h of sunshine, January has the least sunshine of the year.
What is the driest month?
February is the month with the least rainfall in Armstrong. Rain falls for 6.7 days and accumulates 1.18" (30mm) of precipitation.
When does it snow the most?
The month with the most snowfall is February, when snow falls for 8.8 days and typically aggregates up to 2.32" (59mm) 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?
May is the month with the most rainfall. Rain falls for 16.6 days and accumulates 2.76" (70mm) of precipitation.
When it does not snow?
May through October are months without snowfall.
When are the longest days?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10h of sunshine.
When is the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the hottest time of year?
The highest temperatures in Armstrong are recorded in July, with averages reaching a high of 81.1°F (27.3°C) and a low of 64.4°F (18°C).
What is the most humid month?
With an average relative humidity of 85%, July is the most humid month.
What is the least humid month?
With an average relative humidity of 72%, October is the least humid month.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 24min of daylight.
What is the month with the lowest UV index?
With an average maximum UV index of 1, December is the month with the lowest UV index.
Average temperature
Armstrong, IL
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.5°F).
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure
Armstrong, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Armstrong, IL
- Average wind speed in January:
10.5mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.7mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.2mph - Average wind speed in October:
9.2mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity
Armstrong, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Armstrong, IL
- Average rainfall in January:
1.42" - Average rainfall in February:
1.18" - Average rainfall in March:
2.09" - Average rainfall in April:
2.72" - Average rainfall in May:
2.76" - Average rainfall in June:
2.68"
- Average rainfall in July:
2.13" - Average rainfall in August:
2.13" - Average rainfall in September:
1.3" - Average rainfall in October:
1.73" - Average rainfall in November:
1.38" - Average rainfall in December:
1.26"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is February (1.18").
Average rainfall days
Armstrong, IL
- Average rainfall days in January:
7.3 days - Average rainfall days in February:
6.7 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
16.6 days - Average rainfall days in June:
16.3 days
- Average rainfall days in July:
17.7 days - Average rainfall days in August:
14.3 days - Average rainfall days in September:
12.1 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
8.2 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (6.7 days).
Average snowfall
Armstrong, IL
The month with the highest snowfall is February (2.32").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Armstrong, IL
- Average snowfall days in January:
9.8 days - Average snowfall days in February:
8.8 days - Average snowfall days in March:
4.4 days - Average snowfall days in April:
1.1 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:
0.2 days - Average snowfall days in November:
1.9 days - Average snowfall days in December:
8 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Armstrong, IL
- Average daylight in January:
9h and 4min - 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 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 4min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 4min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Armstrong, IL
- Average sunshine days in January:
15.9 days - Average sunshine days in February:
13.3 days - Average sunshine days in March:
15.1 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
10.7 days
- Average sunshine days in July:
9.5 days - Average sunshine days in August:
12.1 days - Average sunshine days in September:
15.3 days - Average sunshine days in October:
17.1 days - Average sunshine days in November:
18.7 days - Average sunshine days in December:
15.9 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (9.5 days).
Average UV index
Armstrong, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Armstrong, IL
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are June, August and September (Cloud cover 33).
Average visibility
Armstrong, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Armstrong, Illinois, USA
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