Climate and monthly weather forecastAlpha, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Alpha, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 16.2°F (-8.8°C) and 28.4°F (-2°C). The month of January, characterized by an average high of 28.4°F (-2°C) and a low of 16.2°F (-8.8°C), is recognized as the coldest. Weather in January »Weather in February
February, the last month of the winter in Alpha, is a wintry month, with an average temperature fluctuating between 19.9°F (-6.7°C) and 33.1°F (0.6°C). As Alpha, Illinois, steps into February, the average high-temperature holds at a cold 33.1°F (0.6°C), hinting at a minor fluctuation from the prior month. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Alpha, Illinois, with an average temperature ranging between max 46.9°F (8.3°C) and min 32.4°F (0.2°C). March brings a rise in Alpha's average high-temperature, moving from an icy 33.1°F (0.6°C) in February to a frosty 46.9°F (8.3°C). Weather in March »Weather in April
April is a refreshing spring month in Alpha, Illinois, with an average temperature varying between 59.2°F (15.1°C) and 42.4°F (5.8°C). The arrival of April brings a temperature shift, with the average high-temperature escalating from a chilly 46.9°F (8.3°C) in March to a mild 59.2°F (15.1°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Alpha, Illinois, with an average temperature ranging between max 70.5°F (21.4°C) and min 53.6°F (12°C). May signals a shift in the average high-temperature, moving from April's moderate 59.2°F (15.1°C) to a pleasant 70.5°F (21.4°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Alpha, Illinois, with temperature in the range of an average low of 62.2°F (16.8°C) and an average high of 79°F (26.1°C). Observing a slight rise in June, the average high-temperature shifts from May's agreeable 70.5°F (21.4°C) to a warm 79°F (26.1°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Alpha, Illinois, with an average temperature varying between 64.9°F (18.3°C) and 81.5°F (27.5°C). With average temperatures fluctuating between a high of 81.5°F (27.5°C) and a low of 64.9°F (18.3°C), July stands out as the warmest month. In July, the average heat index is appraised at a hot 87.8°F (31°C). Weather in July »Weather in August
August, the last month of the summer in Alpha, is another warm month, with temperature in the range of an average high of 80.4°F (26.9°C) and an average low of 63°F (17.2°C). With the start of August, Alpha measures an average high-temperature of a still moderately hot 80.4°F (26.9°C), not significantly differing from July's 81.5°F (27.5°C). Weather in August »Weather in September
September, the first month of the autumn in Alpha, is also a moderately hot month, with an average temperature ranging between min 56.5°F (13.6°C) and max 75.4°F (24.1°C). As September takes hold, the average high-temperature is a still moderately hot 75.4°F (24.1°C), nearly mirroring that of the previous month. Weather in September »Weather in October
October, the same as September, is another refreshing autumn month in Alpha, Illinois, with an average temperature fluctuating between 61.3°F (16.3°C) and 45.1°F (7.3°C). During the transition into October, Alpha observes a decrease in the average high-temperature, falling from a warm 75.4°F (24.1°C) in September to a comfortable 61.3°F (16.3°C). Weather in October »Weather in November
November, the last month of the autumn in Alpha, is another chilly month, with an average temperature fluctuating between 46.9°F (8.3°C) and 33.1°F (0.6°C). A noticeable downshift in temperatures is seen as October gives way to November, with average highs moving from a comfortable 61.3°F (16.3°C) to a frosty 46.9°F (8.3°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Alpha, Illinois, with an average temperature ranging between min 24.1°F (-4.4°C) and max 34.7°F (1.5°C). With December's arrival, Alpha's weather changes as the average high-temperature falls from a chilly 46.9°F (8.3°C) in November to a cold 34.7°F (1.5°C). Weather in December »Updated: Feb 12, 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
January is Alpha's coldest month, registering average high temperatures of 28.4°F (-2°C) and lows of 16.2°F (-8.8°C).
The months with the highest humidity in Alpha, Illinois, are January and July, with an average relative humidity of 83%.
In Alpha, Illinois, during the entire year, the rain falls for 143.6 days and collects up to 27.99" (711mm) of precipitation.
January through April, October through December are months with snowfall in Alpha, Illinois.
The month with the most snowfall in Alpha is January, when snow falls for 11.2 days and typically aggregates up to 4.09" (104mm) of snow.
Throughout the year, there are 36.5 snowfall days, and 13.5" (343mm) of snow is accumulated.
The month with the least sunshine in Alpha is January, with an average of 4h of sunshine.
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
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.
May is the month with the most rainfall in Alpha. Rain falls for 18.2 days and accumulates 4.45" (113mm) of precipitation.
In Alpha, Illinois, snow does not fall in May through September.
June has the longest days of the year in Alpha, with an average of 15h and 6min of daylight.
The warmest temperatures in Alpha, Illinois, occur during July, when averages reach a peak of 81.5°F (27.5°C) and a low of 64.9°F (18.3°C).
July has the most sunshine of the year, with an average of 10.2h of sunshine.
With an average maximum UV index of 6, July is the month with the highest UV index.
October is the least humid month, with an average relative humidity of 71%.
The month with the least rainfall in Alpha, Illinois, is December, when the rain falls for 7.4 days and typically collects 1.26" (32mm) of precipitation.
The month with the shortest days in Alpha, Illinois, is December, with an average of 9h and 18min of daylight.
Average temperature
Alpha, IL
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (28.4°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure
Alpha, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Alpha, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.6mph - Average wind speed in May:
9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.7mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity
Alpha, IL
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Alpha, IL
- Average rainfall in January:
1.38" - Average rainfall in February:
1.42" - Average rainfall in March:
2.01" - Average rainfall in April:
3.23" - Average rainfall in May:
4.45" - Average rainfall in June:
3.23"
- Average rainfall in July:
2.83" - Average rainfall in August:
1.73" - Average rainfall in September:
2.13" - Average rainfall in October:
2.48" - Average rainfall in November:
1.85" - Average rainfall in December:
1.26"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is December (1.26").
Average rainfall days
Alpha, IL
- Average rainfall days in January:
5 days - Average rainfall days in February:
5.5 days - Average rainfall days in March:
12.1 days - Average rainfall days in April:
16.5 days - Average rainfall days in May:
18.2 days - Average rainfall days in June:
16.9 days
- Average rainfall days in July:
15.4 days - Average rainfall days in August:
13.6 days - Average rainfall days in September:
11.1 days - Average rainfall days in October:
12.2 days - Average rainfall days in November:
9.7 days - Average rainfall days in December:
7.4 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (5 days).
Average snowfall
Alpha, IL
The month with the highest snowfall is January (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Alpha, IL
- Average snowfall days in January:
11.2 days - Average snowfall days in February:
9.2 days - Average snowfall days in March:
4.8 days - Average snowfall days in April:
0.9 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:
0.1 days - Average snowfall days in October:
0.6 days - Average snowfall days in November:
2.2 days - Average snowfall days in December:
7.5 days
The month with the highest number of snowfall days is January (11.2 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Alpha, IL
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
4h and 12min - Average sunshine in March:
6h and 30min - Average sunshine in April:
7h and 54min - Average sunshine in May:
8h and 48min - Average sunshine in June:
9h and 54min
- Average sunshine in July:
10h and 12min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 18min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Alpha, IL
- Average sunshine days in January:
15.4 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
14.4 days - Average sunshine days in April:
11.3 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
11 days
- Average sunshine days in July:
12.8 days - Average sunshine days in August:
15.2 days - Average sunshine days in September:
17.8 days - Average sunshine days in October:
16.4 days - Average sunshine days in November:
17.9 days - Average sunshine days in December:
17.8 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is May (10.4 days).
Average UV index
Alpha, IL
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Alpha, IL
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
Alpha, 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).
