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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 Alton, Indiana, with an average temperature fluctuating between 38.8°F (3.8°C) and 25.7°F (-3.5°C). Alton, Indiana, records the coldest temperatures in January, averaging a high of 38.8°F (3.8°C) and a low of 25.7°F (-3.5°C). Weather in January »
Weather in February
February, the last month of the winter in Alton, is a chilly month, with an average temperature ranging between max 43.9°F (6.6°C) and min 29.1°F (-1.6°C). Alton records an average high-temperature of a chilly 43.9°F (6.6°C) in February, closely mirroring the climate of the previous month. Weather in February »
Weather in March
March, the first month of the spring in Alton, is a fresh month, with an average temperature fluctuating between 37.4°F (3°C) and 54.1°F (12.3°C). The start of March is characterized by an increase in the average high-temperature, transitioning from a frosty 43.9°F (6.6°C) in February to a cool 54.1°F (12.3°C). Weather in March »
Weather in April
April in Alton, Indiana, is an enjoyable spring month, with an average temperature ranging between max 66°F (18.9°C) and min 47.1°F (8.4°C). The onset of April brings a rise in the average high-temperature, elevating from a fresh 54.1°F (12.3°C) in March to a refreshing 66°F (18.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Alton, Indiana, with temperature in the range of an average high of 75.4°F (24.1°C) and an average low of 56.8°F (13.8°C). As May arrives, a rise in the average high-temperature is observed, moving from an enjoyable 66°F (18.9°C) in April to a moderately hot 75.4°F (24.1°C). Weather in May »
Weather in June
June, the first month of the summer in Alton, is still a warm month, with temperature in the range of an average low of 63.9°F (17.7°C) and an average high of 83.8°F (28.8°C). A subtle rise in the average high-temperature is observed during June, adjusting from a moderately hot 75.4°F (24.1°C) in May to a still warm 83.8°F (28.8°C). Weather in June »
Weather in July
July in Alton, Indiana, is a tropical summer month, with an average temperature fluctuating between 67.1°F (19.5°C) and 86.5°F (30.3°C). In Alton, the month of July registers the highest temperatures, averaging 86.5°F (30.3°C) at the peak and 67.1°F (19.5°C) at the lowest. In July, the average heat index is estimated at a torrid 100.4°F (38°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Alton, Indiana, with an average temperature varying between 85.6°F (29.8°C) and 65.5°F (18.6°C). Alton's average high-temperature in August is a moderately hot 85.6°F (29.8°C), marking an insignificant difference from the 86.5°F (30.3°C) of July. Weather in August »
Weather in September
September, the first month of the autumn in Alton, is also a moderately hot month, with an average temperature fluctuating between 59.9°F (15.5°C) and 79.3°F (26.3°C). September signifies a gentle decline in Alton's average high-temperature, easing from 85.6°F (29.8°C) in August to a still warm 79.3°F (26.3°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Alton, Indiana, with temperature in the range of an average high of 66.7°F (19.3°C) and an average low of 48°F (8.9°C). The transition into October is accompanied by a temperature decrease, with the average high-temperature shifting from a warm 79.3°F (26.3°C) in September to a refreshing 66.7°F (19.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Alton, Indiana, with an average temperature ranging between max 52.9°F (11.6°C) and min 37.6°F (3.1°C). Alton, Indiana, observes a minor decrease in the average high-temperature with the arrival of November, falling from October's comfortable 66.7°F (19.3°C) to a fresh 52.9°F (11.6°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Alton, Indiana, with temperature in the range of an average high of 43.9°F (6.6°C) and an average low of 31.8°F (-0.1°C). The average high-temperature drops in December, from November's fresh 52.9°F (11.6°C) to a chilly 43.9°F (6.6°C). Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Alton?
In Alton, January registers the lowest temperatures, averaging 38.8°F (3.8°C) at the peak and 25.7°F (-3.5°C) at the lowest.
How many days does it rain in Alton?
In Alton, Indiana, during the entire year, the rain falls for 160 days and collects up to 29.45" (748mm) of precipitation.
When does it snow in Alton?
January through April, September through December are months with snowfall in Alton.
When does it snow the most in Alton?
January is the month with the most snowfall in Alton, Indiana. Snow falls for 7.6 days and accumulates 2.24" (57mm) of snow.
How much does it snow in Alton?
In Alton, Indiana, during the entire year, snow falls for 26.8 days and aggregates up to 7.91" (201mm) of snow.
What are the months with the lowest UV index in Alton?
The months with the lowest UV index in Alton are January, February, November and December, with an average maximum UV index of 2.
What are the most humid months in Alton?
February and December, with an average relative humidity of 80%, are most humid months.
When is Daylight Saving Time (DST) in Alton?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Alton, Indiana, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the rainiest month in Alton?
April is the month with the most rainfall. Rain falls for 15 days and accumulates 3.31" (84mm) of precipitation.
When it does not snow in Alton?
May through August are months without snowfall in Alton, Indiana.
What are the months with the highest UV index in Alton?
May through August, with an average maximum UV index of 6, are months with the highest UV index in Alton, Indiana.
When are the longest days in Alton?
June has the longest days of the year, with an average of 14h and 48min of daylight.
What month is the hottest in Alton?
The warmest time of the year is July, with temperatures averaging a high of 86.5°F (30.3°C) and a low of 67.1°F (19.5°C).
What month has the most sunshine in Alton?
The month with the most sunshine in Alton, Indiana, is July, with an average of 10.3h of sunshine.
What is the driest month in Alton?
The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.61" (41mm) of precipitation.
What is the least humid month in Alton?
The least humid month in Alton, Indiana, is October, with an average relative humidity of 74%.
What is the month with the shortest days in Alton?
December has the shortest days of the year, with an average of 9h and 36min of daylight.
What is the month with the least sunshine in Alton?
With an average of 4.4h of sunshine, December has the least sunshine of the year in Alton.
Average temperature
Alton, IN
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (38.8°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 (25.7°F).
Average pressure
Alton, IN
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"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 (29.95"Hg).
Average wind speed
Alton, IN
- Average wind speed in January:
7.7mph - Average wind speed in February:
7.7mph - Average wind speed in March:
7.5mph - Average wind speed in April:
7.6mph - Average wind speed in May:
6.2mph - Average wind speed in June:
5.6mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.8mph - Average wind speed in September:
5.3mph - Average wind speed in October:
6.5mph - Average wind speed in November:
6.8mph - Average wind speed in December:
7.1mph
The windiest months (with the highest average wind speed) are January and February (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity
Alton, IN
The months with the highest relative humidity are February and December (80%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Alton, IN
- Average rainfall in January:
1.85" - Average rainfall in February:
2.91" - Average rainfall in March:
2.36" - Average rainfall in April:
3.31" - Average rainfall in May:
2.95" - Average rainfall in June:
2.56"
The wettest month (with the highest rainfall) is April (3.31").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days
Alton, IN
- Average rainfall days in January:
10.3 days - Average rainfall days in February:
10.3 days - Average rainfall days in March:
14.3 days - Average rainfall days in April:
15 days - Average rainfall days in May:
18.7 days - Average rainfall days in June:
14.9 days
- Average rainfall days in July:
17.4 days - Average rainfall days in August:
15.1 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
10.4 days - Average rainfall days in November:
9.8 days - Average rainfall days in December:
11.3 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is November (9.8 days).
Average snowfall
Alton, IN
The month with the highest snowfall is January (2.24").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days
Alton, IN
- Average snowfall days in January:
7.6 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
3.6 days - Average snowfall days in April:
0.6 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:
0.2 days - Average snowfall days in November:
1.9 days - Average snowfall days in December:
5.5 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Alton, IN
- 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 2min - Average daylight in June:
14h and 5min
- 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 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 3min - Average sunshine in February:
5h and 3min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 3min - Average sunshine in September:
8h and 2min - Average sunshine in October:
7h and 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).
Average sunshine days
Alton, IN
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
12.7 days - Average sunshine days in March:
12.8 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
11.1 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
13.3 days - Average sunshine days in September:
14.8 days - Average sunshine days in October:
19.1 days - Average sunshine days in November:
17.3 days - Average sunshine days in December:
15.2 days
The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is May (11.1 days).
Average UV index
Alton, IN
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, November and December (UV index 2).
Average cloud cover
Alton, IN
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
Alton, IN
The months with the highest visibility are March, April, June, August, October and November (6mi).
The months with the lowest visibility are January, February, May, July, September and December (5mi).
Alton, Indiana, USA
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