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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, is another cold winter month in Altamont, Illinois, with an average temperature varying between 23.4°F (-4.8°C) and 35.6°F (2°C). January, having an average high-temperature of 35.6°F (2°C) and an average low-temperature of 23.4°F (-4.8°C), is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Altamont, is also a wintry month, with temperature in the range of an average high of 40.3°F (4.6°C) and an average low of 26.6°F (-3°C). Welcoming February, Altamont notes an average high-temperature of a still wintry 40.3°F (4.6°C), nearly consistent with January's 35.6°F (2°C). Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Altamont, Illinois, with temperature in the range of an average high of 52.2°F (11.2°C) and an average low of 36.9°F (2.7°C). March indicates a change in the average high-temperature, moving up from a wintry 40.3°F (4.6°C) in February to a fresh 52.2°F (11.2°C). Weather in March »
Weather in April
April is a comfortable spring month in Altamont, Illinois, with temperature in the range of an average low of 46.6°F (8.1°C) and an average high of 63.5°F (17.5°C). In April, the meteorological conditions change with the average high-temperature moving from a fresh 52.2°F (11.2°C) in March to a refreshing 63.5°F (17.5°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Altamont, Illinois, with an average temperature ranging between min 56.8°F (13.8°C) and max 73.6°F (23.1°C). As May arrives, a rise in the average high-temperature is observed, moving from a refreshing 63.5°F (17.5°C) in April to a warm 73.6°F (23.1°C). Weather in May »
Weather in June
The first month of the summer, June, is still a warm month in Altamont, Illinois, with an average temperature varying between 81.7°F (27.6°C) and 65.5°F (18.6°C). With the onset of June, Altamont observes a minor temperature ascent, with the average high-temperature adjusting from May's warm 73.6°F (23.1°C) to a still moderately hot 81.7°F (27.6°C). Weather in June »
Weather in July
July, like June, in Altamont, Illinois, is another warm summer month, with an average temperature varying between 83.7°F (28.7°C) and 67.1°F (19.5°C). With its high average temperature of 83.7°F (28.7°C) and a low of 67.1°F (19.5°C), July is regarded as the warmest month. For July, the heat index is estimated at a tropical 93.2°F (34°C). Weather in July »
Weather in August
August, the last month of the summer in Altamont, is another warm month, with an average temperature fluctuating between 64.9°F (18.3°C) and 82.2°F (27.9°C). The arrival of August marks a slight shift to an average high-temperature of a still moderately hot 82.2°F (27.9°C) from July's 83.7°F (28.7°C). Weather in August »
Weather in September
September, the first month of the autumn in Altamont, is still a warm month, with an average temperature varying between 77.5°F (25.3°C) and 59.4°F (15.2°C). September commences with an average high-temperature of a still warm 77.5°F (25.3°C), showing little deviation from August's 82.2°F (27.9°C). Weather in September »
Weather in October
October, like September, in Altamont, Illinois, is another enjoyable autumn month, with temperature in the range of an average high of 65.1°F (18.4°C) and an average low of 48.6°F (9.2°C). October's onset brings a reduction in the average high-temperature, from a warm 77.5°F (25.3°C) in September to a comfortable 65.1°F (18.4°C). Weather in October »
Weather in November
November, the last month of the autumn in Altamont, is another cool month, with an average temperature fluctuating between 51.4°F (10.8°C) and 37°F (2.8°C). The average high-temperature decreases in November, shifting from an enjoyable 65.1°F (18.4°C) in October to a fresh 51.4°F (10.8°C). Weather in November »
Weather in December
December, the first month of the winter in Altamont, is also an icy month, with temperature in the range of an average low of 29.3°F (-1.5°C) and an average high of 40.6°F (4.8°C). Altamont's progression into December involves a drop in the average high-temperature, receding from a fresh 51.4°F (10.8°C) in November to a cold 40.6°F (4.8°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest month in Altamont?
January proves to be the coldest month, recording an average maximum temperature of 35.6°F (2°C) and a minimum temperature of 23.4°F (-4.8°C).
How much does it rain in Altamont?
Throughout the year, in Altamont, there are 141.3 rainfall days, and 26.77" (680mm) of precipitation is accumulated.
When does it snow in Altamont?
January through March, November and December are months with snowfall.
When does it snow the most in Altamont?
The month with the most snowfall in Altamont is January, when snow falls for 5.3 days and typically aggregates up to 2.01" (51mm) of snow.
How much does it snow in Altamont?
In Altamont, Illinois, during the entire year, snow falls for 17.7 days and aggregates up to 6.73" (171mm) of snow.
What is the month with the least sunshine in Altamont?
The month with the least sunshine in Altamont, Illinois, is January, with an average of 4.3h of sunshine.
What is the month with the lowest UV index in Altamont?
The months with the lowest UV index in Altamont are January, February, November and December, with an average maximum UV index of 2.
What is the driest month in Altamont?
February is the month with the least rainfall. Rain falls for 7.6 days and accumulates 1.38" (35mm) of precipitation.
When is Daylight Saving Time (DST) in Altamont?
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 in Altamont?
The month with the most rainfall in Altamont, Illinois, is April, when the rain falls for 14.3 days and typically aggregates up to 3.35" (85mm) of precipitation.
When it does not snow in Altamont?
April through October are months without snowfall in Altamont, Illinois.
When are the longest days in Altamont?
With an average of 14h and 54min of daylight, June has the longest days of the year.
What month has the most sunshine in Altamont?
The month with the most sunshine in Altamont, Illinois, is June, with an average of 10.5h of sunshine.
When is the highest UV index in Altamont?
The months with the highest UV index in Altamont are June through August, with an average maximum UV index of 6.
What part of the year is the hottest in Altamont?
With its average high temperature of 83.7°F (28.7°C) and a low of 67.1°F (19.5°C), July is regarded as the warmest month in Altamont.
What is the most humid month in Altamont?
The months with the highest humidity are July and August, with an average relative humidity of 81%.
What is the least humid month in Altamont?
October is the least humid month in Altamont, with an average relative humidity of 71%.
What is the month with the shortest days in Altamont?
The month with the shortest days in Altamont is December, with an average of 9h and 30min of daylight.
Average temperature
Altamont, IL
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.6°F).
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure
Altamont, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"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:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"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 (29.93"Hg).
Average wind speed
Altamont, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10mph - Average wind speed in April:
10mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6mph - Average wind speed in August:
6mph - Average wind speed in September:
6.7mph - Average wind speed in October:
8.7mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.4mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity
Altamont, IL
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Altamont, IL
- Average rainfall in January:
1.77" - Average rainfall in February:
1.38" - Average rainfall in March:
2.32" - Average rainfall in April:
3.35" - Average rainfall in May:
2.91" - Average rainfall in June:
3.11"
- Average rainfall in July:
2.56" - Average rainfall in August:
2.32" - Average rainfall in September:
1.54" - Average rainfall in October:
2.05" - Average rainfall in November:
1.69" - Average rainfall in December:
1.77"
The wettest month (with the highest rainfall) is April (3.35").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days
Altamont, IL
- Average rainfall days in January:
7.3 days - Average rainfall days in February:
7.6 days - Average rainfall days in March:
13.3 days - Average rainfall days in April:
14.3 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
14.5 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
12.5 days - Average rainfall days in September:
10.8 days - Average rainfall days in October:
10.2 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
8.6 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (7.3 days).
Average snowfall
Altamont, IL
The month with the highest snowfall is January (2.01").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Altamont, IL
- Average snowfall days in January:
5.3 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.3 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 days - Average snowfall days in November:
1.3 days - Average snowfall days in December:
3.7 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Altamont, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - 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:
14h and 5min
- 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 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 3min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Altamont, IL
- Average sunshine days in January:
18.9 days - Average sunshine days in February:
15.8 days - Average sunshine days in March:
15.7 days - Average sunshine days in April:
13.9 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
12.4 days
- Average sunshine days in July:
13.1 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
19.3 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
19.5 days
The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is May (10.8 days).
Average UV index
Altamont, IL
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
Altamont, IL
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility
Altamont, IL
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).
Altamont, Illinois, USA
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