Climate and monthly weather forecastAltona, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Altona, Illinois, is a freezing cold winter month, with an average temperature ranging between min 16.5°F (-8.6°C) and max 28.2°F (-2.1°C). January, on average, is the coldest month, registering a high temperature of 28.2°F (-2.1°C) and a low of 16.5°F (-8.6°C). Weather in January »Weather in February
February, the last month of the winter in Altona, is an icy month, with an average temperature fluctuating between 20.3°F (-6.5°C) and 33.3°F (0.7°C). Altona's weather in February indicates an average high-temperature of an icy 33.3°F (0.7°C), nearly consistent with the 28.2°F (-2.1°C) of January. Weather in February »Weather in March
March, the first month of the spring in Altona, is a frosty month, with an average temperature fluctuating between 47.1°F (8.4°C) and 32.4°F (0.2°C). An increase in the average high-temperature marks March, moving from February's wintry 33.3°F (0.7°C) to a frosty 47.1°F (8.4°C). Weather in March »Weather in April
April in Altona, Illinois, is a refreshing spring month, with an average temperature ranging between min 42.4°F (5.8°C) and max 59.2°F (15.1°C). The start of April brings a shift in the average high-temperature, increasing from March's frosty 47.1°F (8.4°C) to a mild 59.2°F (15.1°C). Weather in April »Weather in May
May, the last month of the spring in Altona, is a pleasant month, with an average temperature ranging between max 70.7°F (21.5°C) and min 53.4°F (11.9°C). As May arrives, Altona's weather shows an increase in high-temperatures, moving from April's refreshing 59.2°F (15.1°C) to an agreeable 70.7°F (21.5°C). Weather in May »Weather in June
June, the first month of the summer in Altona, is a warm month, with temperature in the range of an average low of 62.2°F (16.8°C) and an average high of 78.8°F (26°C). The arrival of June introduces a minor uplift in high-temperatures, adjusting from a pleasant 70.7°F (21.5°C) in May to a moderately hot 78.8°F (26°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Altona, Illinois, with an average temperature varying between 81.1°F (27.3°C) and 64.9°F (18.3°C). Altona records the warmest temperatures in July, averaging a high of 81.1°F (27.3°C) and a low of 64.9°F (18.3°C). The heat index for July is appraised at a tropical 87.8°F (31°C). Weather in July »Weather in August
August, the last month of the summer in Altona, is another warm month, with temperature in the range of an average high of 80.2°F (26.8°C) and an average low of 63°F (17.2°C). The start of August sees the average high-temperature at a still warm 80.2°F (26.8°C), showing little difference from July's 81.1°F (27.3°C). Weather in August »Weather in September
September, the first month of the autumn in Altona, is also a moderately hot month, with temperature in the range of an average low of 56.3°F (13.5°C) and an average high of 75.4°F (24.1°C). Entering September, Altona's average high-temperature reads a still warm 75.4°F (24.1°C), indicating a close resemblance to the previous month's climate. Weather in September »Weather in October
October, like September, in Altona, Illinois, is another enjoyable autumn month, with an average temperature ranging between min 45.5°F (7.5°C) and max 61.3°F (16.3°C). The commencement of October involves a temperature shift, with the average high-temperature dropping from a moderately hot 75.4°F (24.1°C) in September to an enjoyable 61.3°F (16.3°C). Weather in October »Weather in November
November, the last month of the autumn in Altona, is also a frosty month, with an average temperature varying between 46.9°F (8.3°C) and 33.3°F (0.7°C). The arrival of November brings a distinct temperature shift, with the average high-temperature dropping from a refreshing 61.3°F (16.3°C) in October to a chilly 46.9°F (8.3°C). Weather in November »Weather in December
The first month of the winter, December, is also an icy month in Altona, Illinois, with an average temperature fluctuating between 24.1°F (-4.4°C) and 34.7°F (1.5°C). Start of December brings a shift in the average high-temperature, falling from November's frosty 46.9°F (8.3°C) 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 tends to be the coldest month in Altona, Illinois, with temperatures averaging a daily high of 28.2°F (-2.1°C) and a low of 16.5°F (-8.6°C).
In Altona, Illinois, during the entire year, the rain falls for 127.7 days and collects up to 17.8" (452mm) of precipitation.
Months with snowfall are January through April, October through December.
The month with the most snowfall is January, when snow falls for 10.5 days and typically aggregates up to 2.17" (55mm) of snow.
Throughout the year, in Altona, there are 35.5 snowfall days, and 7.95" (202mm) of snow is accumulated.
January has the least sunshine of the year, with an average of 4h of sunshine.
With an average maximum UV index of 1, January is the month with the lowest UV index in Altona.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Altona, Illinois, 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.
The month with the most rainfall is May, when the rain falls for 16.5 days and typically aggregates up to 2.76" (70mm) of precipitation.
In Altona, Illinois, snow does not fall in May through September.
With an average of 15h and 6min of daylight, June has the longest days of the year in Altona, Illinois.
June and July, with an average of 10.1h of sunshine, are months with the most sunshine in Altona, Illinois.
June and July, with an average maximum UV index of 6, are months with the highest UV index.
The warmest period in Altona tends to be July, when average temperatures fluctuate between a high of 81.1°F (27.3°C) and a low of 64.9°F (18.3°C).
The most humid month in Altona, Illinois, is July, with an average relative humidity of 84%.
With an average relative humidity of 72%, October is the least humid month.
The month with the least rainfall is December, when the rain falls for 6.5 days and typically collects 0.71" (18mm) of precipitation.
With an average of 9h and 18min of daylight, December has the shortest days of the year in Altona.
Average temperature
Altona, 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 (28.2°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 (16.5°F).
Average pressure
Altona, 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:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"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 (29.91"Hg).
Average wind speed
Altona, 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:
9.1mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.6mph - 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 (6.6mph).
Average humidity
Altona, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Altona, IL
- Average rainfall in January:
0.75" - Average rainfall in February:
0.94" - Average rainfall in March:
1.14" - Average rainfall in April:
2.2" - Average rainfall in May:
2.76" - Average rainfall in June:
2.01"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.42" - Average rainfall in September:
1.26" - Average rainfall in October:
1.69" - Average rainfall in November:
1.02" - Average rainfall in December:
0.71"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is December (0.71").
Average rainfall days
Altona, IL
- Average rainfall days in January:
4 days - Average rainfall days in February:
4.7 days - Average rainfall days in March:
10.6 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
14.7 days - Average rainfall days in August:
13.2 days - Average rainfall days in September:
9.9 days - Average rainfall days in October:
11 days - Average rainfall days in November:
7.7 days - Average rainfall days in December:
6.5 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (4 days).
Average snowfall
Altona, IL
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Altona, IL
- Average snowfall days in January:
10.5 days - Average snowfall days in February:
8.7 days - Average snowfall days in March:
4.4 days - Average snowfall days in April:
1.5 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:
0.6 days - Average snowfall days in November:
2.4 days - Average snowfall days in December:
7.4 days
The month with the highest number of snowfall days is January (10.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Altona, 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 36min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 54min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 36min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 18min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Altona, IL
- Average sunshine days in January:
16.8 days - Average sunshine days in February:
15.5 days - Average sunshine days in March:
16 days - Average sunshine days in April:
13.2 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
11.7 days
- Average sunshine days in July:
11.2 days - Average sunshine days in August:
13.5 days - Average sunshine days in September:
18 days - Average sunshine days in October:
17.6 days - Average sunshine days in November:
19.7 days - Average sunshine days in December:
19.2 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.2 days).
Average UV index
Altona, IL
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Altona, IL
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility
Altona, IL
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
