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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, like December, is another chilly winter month in Alton, Missouri, with an average temperature varying between 43.3°F (6.3°C) and 28.4°F (-2°C). The coldest time of the year is January, with temperatures averaging a high of 43.3°F (6.3°C) and a low of 28.4°F (-2°C). Weather in January »
Weather in February
The last month of the winter, February, is also a frosty month in Alton, Missouri, with an average temperature fluctuating between 47.5°F (8.6°C) and 31.8°F (-0.1°C). With the onset of February, the average high-temperature stands at a still chilly 47.5°F (8.6°C), closely aligned with January's 43.3°F (6.3°C). Weather in February »
Weather in March
March, the first month of the spring in Alton, is a moderate month, with temperature in the range of an average high of 57.7°F (14.3°C) and an average low of 40.1°F (4.5°C). March's arrival is marked by an increase in the average high-temperature, moving from a frosty 47.5°F (8.6°C) in February to a mild 57.7°F (14.3°C). Weather in March »
Weather in April
April is a refreshing spring month in Alton, Missouri, with an average temperature varying between 67.8°F (19.9°C) and 48.9°F (9.4°C). In April, the average high-temperature increases from a mild 57.7°F (14.3°C) in March to a comfortable 67.8°F (19.9°C). Weather in April »
Weather in May
May, the last month of the spring in Alton, is a moderately hot month, with an average temperature ranging between max 77.2°F (25.1°C) and min 57.6°F (14.2°C). May brings a rise in Alton's average high-temperature, moving from a refreshing 67.8°F (19.9°C) in April to a warm 77.2°F (25.1°C). Weather in May »
Weather in June
June, the first month of the summer in Alton, is a hot month, with an average temperature fluctuating between 66°F (18.9°C) and 86.9°F (30.5°C). June sees a rise in the average high-temperature, climbing from a warm 77.2°F (25.1°C) in May to a tropical 86.9°F (30.5°C). Weather in June »
Weather in July
July, like June, is another tropical summer month in Alton, Missouri, with an average temperature ranging between min 68.5°F (20.3°C) and max 89.4°F (31.9°C). Alton reaches its highest average temperatures in July, measuring 89.4°F (31.9°C) at the peak and 68.5°F (20.3°C) at the lowest. The heat index in July is appraised at an extremely hot 107.6°F (42°C). Weather in July »
Weather in August
August, the last month of the summer in Alton, is also a hot month, with an average temperature fluctuating between 67.5°F (19.7°C) and 88.3°F (31.3°C). Alton's August reports an average high-temperature of a still hot 88.3°F (31.3°C), exhibiting a minor difference from July. Weather in August »
Weather in September
September, the first month of the autumn in Alton, is still a warm month, with an average temperature varying between 60.8°F (16°C) and 81.9°F (27.7°C). September's arrival subtly correlates with a reduction in the average high-temperature, down from a hot 88.3°F (31.3°C) in August to a moderately hot 81.9°F (27.7°C). Weather in September »
Weather in October
October, the same as September, in Alton, Missouri, is another pleasant autumn month, with an average temperature varying between 69.1°F (20.6°C) and 49.8°F (9.9°C). October comes with a decrease in the average high-temperature, falling from a moderately hot 81.9°F (27.7°C) in September to a pleasant 69.1°F (20.6°C). Weather in October »
Weather in November
November, the last month of the autumn in Alton, is also a moderate month, with an average temperature varying between 56.1°F (13.4°C) and 39.7°F (4.3°C). The onset of November comes with a shift in the average high-temperature, falling from an agreeable 69.1°F (20.6°C) in October to a moderate 56.1°F (13.4°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Alton, Missouri, with an average temperature varying between 46.8°F (8.2°C) and 32.5°F (0.3°C). With the beginning of December, the average high-temperature shows a decrease, transitioning from a mild 56.1°F (13.4°C) in November to a frosty 46.8°F (8.2°C). Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Alton?
January is the coldest month in Alton, Missouri, exhibiting average temperatures of 43.3°F (6.3°C) at the peak and 28.4°F (-2°C) at the base.
How many days does it rain in Alton?
Throughout the year, in Alton, there are 148 rainfall days, and 35.39" (899mm) of precipitation is accumulated.
When does it snow in Alton?
Months with snowfall in Alton are January through April, November and December.
How many days does it snow in Alton?
Throughout the year, in Alton, there are 8.9 snowfall days, and 4.57" (116mm) of snow is accumulated.
What are the months with the lowest UV index in Alton?
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Alton, Missouri.
What is the snowiest month in Alton?
February is the month with the most snowfall in Alton. Snow falls for 2.8 days and accumulates 1.26" (32mm) of snow.
What is the month with the least sunshine in Alton?
With an average of 4.8h of sunshine, February has the least sunshine of the year in Alton.
What is the most humid month in Alton?
March and May, with an average relative humidity of 79%, are most humid months in Alton, Missouri.
When is Daylight Saving Time (DST) in Alton?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Alton, 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 Alton?
The month with the most rainfall is May, when the rain falls for 16.5 days and typically aggregates up to 4.25" (108mm) of precipitation.
When it does not snow in Alton?
In Alton, Missouri, snow does not fall in May through October.
When are the longest days in Alton?
June has the longest days of the year in Alton, with an average of 14h and 36min of daylight.
What month has the most sunshine in Alton?
With an average of 10.4h of sunshine, June has the most sunshine of the year.
When is the highest UV index in Alton?
June is the month with the highest UV index, with an average maximum UV index of 7.
What month is the hottest in Alton?
The warmest temperatures occur during July, when averages reach a peak of 89.4°F (31.9°C) and a low of 68.5°F (20.3°C).
What is the driest month in Alton?
The month with the least rainfall is September, when the rain falls for 12 days and typically collects 1.57" (40mm) of precipitation.
What is the least humid month in Alton?
The least humid month in Alton is October, with an average relative humidity of 72%.
What is the month with the shortest days in Alton?
The month with the shortest days is December, with an average of 9h and 42min of daylight.
Average temperature
Alton, MO
The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (43.3°F).
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure
Alton, MO
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"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:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.13"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 (29.93"Hg).
Average wind speed
Alton, MO
- Average wind speed in January:
8.1mph - Average wind speed in February:
8.1mph - Average wind speed in March:
8.1mph - Average wind speed in April:
8.1mph - Average wind speed in May:
6.9mph - Average wind speed in June:
5.9mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.7mph - Average wind speed in October:
6.9mph - Average wind speed in November:
7.5mph - Average wind speed in December:
7.6mph
The windiest months (with the highest average wind speed) are January, February, March and April (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity
Alton, MO
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Alton, MO
- Average rainfall in January:
2.56" - Average rainfall in February:
2.6" - Average rainfall in March:
3.66" - Average rainfall in April:
4.13" - Average rainfall in May:
4.25" - Average rainfall in June:
2.68"
- Average rainfall in July:
3.15" - Average rainfall in August:
2.8" - Average rainfall in September:
1.57" - Average rainfall in October:
2.91" - Average rainfall in November:
2.52" - Average rainfall in December:
2.56"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days
Alton, MO
- Average rainfall days in January:
8.6 days - Average rainfall days in February:
9 days - Average rainfall days in March:
14.1 days - Average rainfall days in April:
13.5 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
12 days - Average rainfall days in October:
10.8 days - Average rainfall days in November:
9 days - Average rainfall days in December:
9.3 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (8.6 days).
Average snowfall
Alton, MO
The month with the highest snowfall is February (1.26").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Alton, MO
- Average snowfall days in January:
2.5 days - Average snowfall days in February:
2.8 days - Average snowfall days in March:
1.1 days - Average snowfall days in April:
0.2 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:
0.7 days - Average snowfall days in December:
1.6 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Alton, MO
- Average daylight in January:
10h and 0min - 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 2min - Average daylight in August:
13h and 3min - 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 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
5h and 1min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 4min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 4min - Average sunshine in December:
5h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days
Alton, MO
- Average sunshine days in January:
19.3 days - Average sunshine days in February:
15.6 days - Average sunshine days in March:
14.4 days - Average sunshine days in April:
14.5 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
13.3 days
- Average sunshine days in July:
13.1 days - Average sunshine days in August:
12.7 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
18.7 days - Average sunshine days in November:
19.3 days - Average sunshine days in December:
19.6 days
The month with the most sunshine days is December (19.6 days).
The month with the least sunshine days is May (12.3 days).
Average UV index
Alton, MO
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover
Alton, MO
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility
Alton, MO
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are May and July (5mi).
Alton, Missouri, USA
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