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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 a freezing cold winter month in Alton, Idaho, with an average temperature ranging between min 7.9°F (-13.4°C) and max 26.2°F (-3.2°C). Alton, Idaho, marks the start of January with an average high-temperature of a still freezing cold 26.2°F (-3.2°C), hinting at a slight fluctuation from December's 25.2°F (-3.8°C). Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Alton, Idaho, with an average temperature varying between 10.2°F (-12.1°C) and 27.3°F (-2.6°C). Alton experiences an average high-temperature of a still subzero cold 27.3°F (-2.6°C) in February, subtly different from January's 26.2°F (-3.2°C). Weather in February »
Weather in March
The first month of the spring, March, is a wintry month in Alton, Idaho, with an average temperature fluctuating between 18°F (-7.8°C) and 34.5°F (1.4°C). March marks a minor ascent in the average high-temperature, adjusting from February's freezing cold 27.3°F (-2.6°C) to an icy 34.5°F (1.4°C). Weather in March »
Weather in April
April is a frosty spring month in Alton, Idaho, with an average temperature fluctuating between 44.2°F (6.8°C) and 25°F (-3.9°C). April shows a rise in the average high-temperature, moving from March's cold 34.5°F (1.4°C) to a chilly 44.2°F (6.8°C). Weather in April »
Weather in May
May, the last month of the spring in Alton, is a refreshing month, with an average temperature ranging between min 33.3°F (0.7°C) and max 56.3°F (13.5°C). As Alton welcomes May, the average high-temperature sees a rise, transitioning from a chilly 44.2°F (6.8°C) in April to a moderate 56.3°F (13.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a pleasant month in Alton, Idaho, with temperature in the range of an average high of 68.9°F (20.5°C) and an average low of 40.6°F (4.8°C). The transition from May to June brings a temperature rise, with average high-temperatures increasing from a refreshing 56.3°F (13.5°C) to a pleasant 68.9°F (20.5°C). Weather in June »
Weather in July
July in Alton, Idaho, is a warm summer month, with an average temperature fluctuating between 48.9°F (9.4°C) and 79°F (26.1°C). July is the warmest month, exhibiting average temperatures of 79°F (26.1°C) at the peak and 48.9°F (9.4°C) at the base. Weather in July »
Weather in August
August, the last month of the summer in Alton, is also a moderately hot month, with an average temperature fluctuating between 48.6°F (9.2°C) and 77.7°F (25.4°C). A minimal variation is noted in Alton's average high-temperature at the onset of August, reaching a still warm 77.7°F (25.4°C) from July's 79°F (26.1°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Alton, Idaho, with an average temperature ranging between min 42.3°F (5.7°C) and max 68°F (20°C). Alton's September weather features a mild decline in high-temperatures, reducing from a moderately hot 77.7°F (25.4°C) in August to an agreeable 68°F (20°C). Weather in September »
Weather in October
October, like September, in Alton, Idaho, is a cool autumn month, with an average temperature varying between 50.5°F (10.3°C) and 30.4°F (-0.9°C). October marks a distinct drop in the average high-temperature, descending from September's pleasant 68°F (20°C) to a fresh 50.5°F (10.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Alton, is also an icy month, with an average temperature varying between 19.4°F (-7°C) and 36.5°F (2.5°C). November is characterized by a reduction in the average high-temperature, from a fresh 50.5°F (10.3°C) in October to an icy 36.5°F (2.5°C). Weather in November »
Weather in December
December, the first month of the winter in Alton, is still a freezing cold month, with an average temperature fluctuating between 25.2°F (-3.8°C) and 9.5°F (-12.5°C). Alton experiences its lowest average temperatures in December, reaching a peak of 25.2°F (-3.8°C) and a minimum of 9.5°F (-12.5°C). Weather in December »
[Resources]Frequently asked questions
What are the most humid months in Alton?
The months with the highest humidity in Alton, Idaho, are January and February, with an average relative humidity of 92%.
How many days does it rain in Alton?
In Alton, Idaho, during the entire year, the rain falls for 117.5 days and collects up to 20.24" (514mm) of precipitation.
When does it snow in Alton?
Months with snowfall are January through June, September through December.
How many days does it snow in Alton?
In Alton, Idaho, during the entire year, snow falls for 116.1 days and aggregates up to 91.14" (2315mm) of snow.
What is the month with the least sunshine in Alton?
The month with the least sunshine in Alton, Idaho, is January, with an average of 4.4h of sunshine.
When is the lowest UV index in Alton?
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1.
When does it snow the most in Alton?
February is the month with the most snowfall. Snow falls for 21.3 days and accumulates 18.39" (467mm) of snow.
When is Daylight Saving Time (DST) in Alton?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Alton, Idaho, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
What is the wettest month in Alton?
The month with the most rainfall in Alton, Idaho, is May, when the rain falls for 17.3 days and typically aggregates up to 2.6" (66mm) of precipitation.
When are the longest days in Alton?
With an average of 15h and 12min of daylight, June has the longest days of the year in Alton.
When is the highest UV index in Alton?
The months with the highest UV index in Alton are June and July, with an average maximum UV index of 5.
What month is the hottest in Alton?
With its average high temperature of 79°F (26.1°C) and a low of 48.9°F (9.4°C), July is regarded as the warmest month in Alton, Idaho.
What is the driest month in Alton?
July is the month with the least rainfall in Alton, Idaho. Rain falls for 7.8 days and accumulates 0.63" (16mm) of precipitation.
When it does not snow in Alton?
In Alton, Idaho, snow does not fall in July and August.
What month has the most sunshine in Alton?
July has the most sunshine of the year, with an average of 11.9h of sunshine.
What is the least humid month in Alton?
The least humid month in Alton, Idaho, is August, with an average relative humidity of 42%.
What time of the year is the coldest in Alton?
December, with an average high of 25.2°F (-3.8°C) and a low of 9.5°F (-12.5°C), signifies the coldest month of the year.
What is the month with the shortest days in Alton?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Alton, ID
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is December (25.2°F).
The month with the highest average low temperature is July (48.9°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure
Alton, ID
- Average pressure in January:
30.29"Hg - Average pressure in February:
30.16"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.15"Hg - Average pressure in December:
30.25"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Alton, ID
- Average wind speed in January:
4.2mph - Average wind speed in February:
4.8mph - Average wind speed in March:
4.8mph - Average wind speed in April:
5.5mph - Average wind speed in May:
5.5mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.6mph - Average wind speed in September:
5.4mph - Average wind speed in October:
4.8mph - Average wind speed in November:
4.7mph - Average wind speed in December:
4.2mph
The windiest month (with the highest average wind speed) is June (5.8mph).
The calmest months (with the lowest average wind speed) are January and December (4.2mph).
Average humidity
Alton, ID
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is August (42%).
Average rainfall
Alton, ID
- Average rainfall in January:
2.17" - Average rainfall in February:
2.44" - Average rainfall in March:
2.13" - Average rainfall in April:
2.48" - Average rainfall in May:
2.6" - Average rainfall in June:
1.3"
- Average rainfall in July:
0.63" - Average rainfall in August:
0.79" - Average rainfall in September:
1.14" - Average rainfall in October:
1.22" - Average rainfall in November:
1.46" - Average rainfall in December:
1.89"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days
Alton, ID
- Average rainfall days in January:
6 days - Average rainfall days in February:
7.2 days - Average rainfall days in March:
11.5 days - Average rainfall days in April:
14.7 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
10.9 days
- Average rainfall days in July:
7.8 days - Average rainfall days in August:
8.5 days - Average rainfall days in September:
9.1 days - Average rainfall days in October:
9.1 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (6 days).
Average snowfall
Alton, ID
- Average snowfall in January:
18.11" - Average snowfall in February:
18.39" - Average snowfall in March:
14.29" - Average snowfall in April:
9.65" - Average snowfall in May:
2.56" - Average snowfall in June:
0.08"
The month with the highest snowfall is February (18.39").
The months with the least snowfall are July and August (0").
Average snowfall days
Alton, ID
- Average snowfall days in January:
19.8 days - Average snowfall days in February:
21.3 days - Average snowfall days in March:
18.3 days - Average snowfall days in April:
12.3 days - Average snowfall days in May:
3.4 days - Average snowfall days in June:
0.4 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.5 days - Average snowfall days in October:
5.6 days - Average snowfall days in November:
12.9 days - Average snowfall days in December:
21.6 days
The month with the highest number of snowfall days is December (21.6 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Alton, ID
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
9h and 1min - Average sunshine in May:
10h and 2min - Average sunshine in June:
11h and 2min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
11h and 5min - Average sunshine in September:
10h and 1min - Average sunshine in October:
7h and 1min - Average sunshine in November:
6h and 1min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Alton, ID
- Average sunshine days in January:
11.3 days - Average sunshine days in February:
6.8 days - Average sunshine days in March:
7.8 days - Average sunshine days in April:
7.6 days - Average sunshine days in May:
8.8 days - Average sunshine days in June:
16.2 days
- Average sunshine days in July:
18.8 days - Average sunshine days in August:
18.1 days - Average sunshine days in September:
18.3 days - Average sunshine days in October:
18 days - Average sunshine days in November:
14.9 days - Average sunshine days in December:
9.4 days
The month with the most sunshine days is July (18.8 days).
The month with the least sunshine days is February (6.8 days).
Average UV index
Alton, ID
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover
Alton, ID
The month with the most cloud cover is February (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility
Alton, ID
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
Alton, Idaho, USA
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