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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 an icy winter month in Alto Pass, Illinois, with an average temperature fluctuating between 26.8°F (-2.9°C) and 39.7°F (4.3°C). Alto Pass, Illinois, records the coldest temperatures in January, averaging a high of 39.7°F (4.3°C) and a low of 26.8°F (-2.9°C). Weather in January »
Weather in February
February, the last month of the winter in Alto Pass, is a frosty month, with an average temperature ranging between max 44.6°F (7°C) and min 30.4°F (-0.9°C). The transition into February shows a subtle variation to a frosty 44.6°F (7°C) from January's 39.7°F (4.3°C) in the average high-temperature. Weather in February »
Weather in March
The first month of the spring, March, is a refreshing month in Alto Pass, Illinois, with an average temperature varying between 55.6°F (13.1°C) and 39.4°F (4.1°C). March marks a rise in the average high-temperature, moving from February's frosty 44.6°F (7°C) to a refreshing 55.6°F (13.1°C). Weather in March »
Weather in April
April in Alto Pass, Illinois, is a refreshing spring month, with an average temperature ranging between min 48.9°F (9.4°C) and max 66.6°F (19.2°C). April brings a rise in Alto Pass's average high-temperature, moving from a moderate 55.6°F (13.1°C) in March to a comfortable 66.6°F (19.2°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Alto Pass, Illinois, with temperature in the range of an average low of 58.1°F (14.5°C) and an average high of 75.7°F (24.3°C). The onset of May brings a rise in the average high-temperature, elevating from a comfortable 66.6°F (19.2°C) in April to a warm 75.7°F (24.3°C). Weather in May »
Weather in June
June, the first month of the summer in Alto Pass, is still a warm month, with an average temperature fluctuating between 66.2°F (19°C) and 85.6°F (29.8°C). As June arrives, Alto Pass's weather shows an increase in high-temperatures, moving from May's 75.7°F (24.3°C) to a still warm 85.6°F (29.8°C). Weather in June »
Weather in July
July in Alto Pass, Illinois, is a hot summer month, with an average temperature varying between 69.1°F (20.6°C) and 88.3°F (31.3°C). July is the warmest month, exhibiting average temperatures of 88.3°F (31.3°C) at the peak and 69.1°F (20.6°C) at the base. In July, the heat index is appraised at a blisteringly hot 104°F (40°C). Weather in July »
Weather in August
August, the last month of the summer in Alto Pass, is another hot month, with an average temperature ranging between min 66.7°F (19.3°C) and max 86.5°F (30.3°C). The commencement of August records an average high-temperature of a still tropical 86.5°F (30.3°C), barely varying from July's 88.3°F (31.3°C). Weather in August »
Weather in September
September, the first month of the autumn in Alto Pass, is also a moderately hot month, with an average temperature fluctuating between 81°F (27.2°C) and 60.6°F (15.9°C). The advent of September brings a slight shift in average high-temperature, moving from a hot 86.5°F (30.3°C) in August to a moderately hot 81°F (27.2°C). Weather in September »
Weather in October
October, like September, in Alto Pass, Illinois, is another refreshing autumn month, with an average temperature ranging between max 67.8°F (19.9°C) and min 49.5°F (9.7°C). With October's arrival, Alto Pass's weather changes as the average high-temperature falls from a moderately hot 81°F (27.2°C) in September to a refreshing 67.8°F (19.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Alto Pass, Illinois, with an average temperature varying between 38.7°F (3.7°C) and 54.5°F (12.5°C). As October shifts into November, a slight alteration in temperatures is observed, with average highs reducing from a refreshing 67.8°F (19.9°C) to a fresh 54.5°F (12.5°C). Weather in November »
Weather in December
December, the first month of the winter in Alto Pass, is still a chilly month, with an average temperature ranging between max 44.8°F (7.1°C) and min 32.2°F (0.1°C). In Alto Pass, the average high-temperature in December decreases from a fresh 54.5°F (12.5°C) in November to a chilly 44.8°F (7.1°C). Weather in December »
Updated: Aug 5, 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?
The coldest temperatures occur during January, when averages reach a peak of 39.7°F (4.3°C) and a low of 26.8°F (-2.9°C).
How many days does it rain?
Throughout the year, there are 143 rainfall days, and 27.44" (697mm) of precipitation is accumulated.
When does it snow?
January through April, October through December are months with snowfall.
How many days does it snow?
Throughout the year, there are 14.9 snowfall days, and 6.06" (154mm) of snow is accumulated.
What is the month with the least sunshine?
The months with the least sunshine are January and February, with an average of 4.6h of sunshine.
What is the month with the lowest UV index?
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2.
What is the snowiest month?
The month with the most snowfall is February, when snow falls for 3.9 days and typically aggregates up to 1.89" (48mm) 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 wettest month?
The month with the most rainfall in Alto Pass, Illinois, is April, when the rain falls for 13.4 days and typically aggregates up to 3.31" (84mm) of precipitation.
What is the most humid month?
With an average relative humidity of 79%, May is the most humid month.
When it does not snow?
In Alto Pass, snow does not fall in May through September.
When is the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days?
With an average of 14h and 42min of daylight, June has the longest days of the year.
What month is the hottest in Alto Pass?
With average high and low temperatures of 88.3°F (31.3°C) and 69.1°F (20.6°C) respectively, July is Alto Pass's warmest month.
What month has the most sunshine?
With an average of 10.4h of sunshine, July has the most sunshine of the year.
What is the driest month?
September is the month with the least rainfall in Alto Pass. Rain falls for 10.8 days and accumulates 1.3" (33mm) of precipitation.
What is the least humid month?
The least humid month in Alto Pass is October, with an average relative humidity of 71%.
What is the month with the shortest days?
With an average of 9h and 36min of daylight, December has the shortest days of the year.
Average temperature
Alto Pass, IL
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (39.7°F).
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure
Alto Pass, 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:
29.96"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Alto Pass, IL
- Average wind speed in January:
9mph - Average wind speed in February:
8.9mph - Average wind speed in March:
8.8mph - Average wind speed in April:
8.8mph - Average wind speed in May:
7.3mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6.2mph - Average wind speed in October:
7.6mph - Average wind speed in November:
8.3mph - Average wind speed in December:
8.5mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity
Alto Pass, IL
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Alto Pass, IL
- Average rainfall in January:
1.57" - Average rainfall in February:
2.24" - Average rainfall in March:
2.48" - Average rainfall in April:
3.31" - Average rainfall in May:
2.95" - Average rainfall in June:
2.87"
- Average rainfall in July:
2.48" - Average rainfall in August:
2.44" - Average rainfall in September:
1.3" - Average rainfall in October:
2.01" - Average rainfall in November:
1.97" - Average rainfall in December:
1.81"
The wettest month (with the highest rainfall) is April (3.31").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days
Alto Pass, IL
- Average rainfall days in January:
8.4 days - Average rainfall days in February:
9.6 days - Average rainfall days in March:
14.1 days - Average rainfall days in April:
13.4 days - Average rainfall days in May:
14.9 days - Average rainfall days in June:
14.6 days
- Average rainfall days in July:
15.9 days - Average rainfall days in August:
14.8 days - Average rainfall days in September:
10.8 days - Average rainfall days in October:
8.7 days - Average rainfall days in November:
8.6 days - Average rainfall days in December:
9.2 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is January (8.4 days).
Average snowfall
Alto Pass, IL
The month with the highest snowfall is February (1.89").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Alto Pass, IL
- Average snowfall days in January:
4.6 days - Average snowfall days in February:
3.9 days - Average snowfall days in March:
2.2 days - Average snowfall days in April:
0.4 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:
0.1 days - Average snowfall days in November:
1.1 days - Average snowfall days in December:
2.6 days
The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Alto Pass, 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 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 3min - 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 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 3min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 3min - Average sunshine in October:
6h and 3min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days
Alto Pass, IL
- Average sunshine days in January:
18.6 days - Average sunshine days in February:
14.7 days - Average sunshine days in March:
14.4 days - Average sunshine days in April:
14.5 days - Average sunshine days in May:
13.8 days - Average sunshine days in June:
13 days
- Average sunshine days in July:
12.8 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
21 days - Average sunshine days in November:
19.7 days - Average sunshine days in December:
19.6 days
The month with the most sunshine days is October (21 days).
The month with the least sunshine days is July (12.8 days).
Average UV index
Alto Pass, IL
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Alto Pass, IL
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 28).
Average visibility
Alto Pass, 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).
Alto Pass, Illinois, USA
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