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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, in Saint Charles, Idaho, is another subzero cold winter month, with an average temperature varying between 8.4°F (-13.1°C) and 26.4°F (-3.1°C). As Saint Charles welcomes January, the average high-temperature records at a still freezing cold 26.4°F (-3.1°C), marking an insignificant deviation from the prior month. Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Saint Charles, Idaho, with an average temperature fluctuating between 11.5°F (-11.4°C) and 28.2°F (-2.1°C). As Saint Charles, Idaho, transitions into February, the average high-temperature stands at a still freezing cold 28.2°F (-2.1°C), offering little variation from the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a cold month in Saint Charles, Idaho, with an average temperature ranging between min 18.9°F (-7.3°C) and max 35.8°F (2.1°C). With the onset of March, Saint Charles observes a minor temperature ascent, with the average high-temperature adjusting from February's freezing cold 28.2°F (-2.1°C) to an icy 35.8°F (2.1°C). Weather in March »
Weather in April
April is a frosty spring month in Saint Charles, Idaho, with temperature in the range of an average high of 44.6°F (7°C) and an average low of 26.1°F (-3.3°C). Observing a slight rise in April, the average high-temperature shifts from March's cold 35.8°F (2.1°C) to a frosty 44.6°F (7°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Saint Charles, Idaho, with temperature in the range of an average high of 56.3°F (13.5°C) and an average low of 34.2°F (1.2°C). May's arrival sees a rise in the average high-temperature, jumping from April's chilly 44.6°F (7°C) to a mild 56.3°F (13.5°C). Weather in May »
Weather in June
June, the first month of the summer in Saint Charles, is a pleasant month, with an average temperature varying between 41.5°F (5.3°C) and 69.6°F (20.9°C). The transition from May to June brings a temperature rise, with average high-temperatures increasing from a mild 56.3°F (13.5°C) to an agreeable 69.6°F (20.9°C). Weather in June »
Weather in July
July is a moderately hot summer month in Saint Charles, Idaho, with an average temperature ranging between max 79.2°F (26.2°C) and min 49.6°F (9.8°C). In Saint Charles, Idaho, the average temperatures in July are the highest, with a peak at 79.2°F (26.2°C) and a low of 49.6°F (9.8°C). Weather in July »
Weather in August
August, the last month of the summer in Saint Charles, is also a moderately hot month, with an average temperature fluctuating between 49.8°F (9.9°C) and 77.5°F (25.3°C). August denotes a minimal variation in the average high-temperature to a still moderately hot 77.5°F (25.3°C) from July's 79.2°F (26.2°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Saint Charles, Idaho, with an average temperature fluctuating between 68.4°F (20.2°C) and 43.2°F (6.2°C). September ushers in a slight temperature change, with average high-temperatures reducing from August's warm 77.5°F (25.3°C) to an agreeable 68.4°F (20.2°C). Weather in September »
Weather in October
October, like September, in Saint Charles, Idaho, is a cool autumn month, with an average temperature ranging between max 50.7°F (10.4°C) and min 31.5°F (-0.3°C). October signals a significant shift in the average high-temperature, falling from September's agreeable 68.4°F (20.2°C) to a fresh 50.7°F (10.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cold month in Saint Charles, Idaho, with an average temperature fluctuating between 37.6°F (3.1°C) and 20.7°F (-6.3°C). As November begins, there is a decrease in the average high-temperature, falling from a fresh 50.7°F (10.4°C) in October to a cold 37.6°F (3.1°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Saint Charles, Idaho, with temperature in the range of an average high of 25.5°F (-3.6°C) and an average low of 9.9°F (-12.3°C). Saint Charles's December weather reaches an average high of 25.5°F (-3.6°C) and an average low of 9.9°F (-12.3°C), making it the coldest month. Weather in December »
Updated: Aug 22, 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
What is the most humid month?
The most humid month is January, with an average relative humidity of 92%.
How much does it rain?
In Saint Charles, during the entire year, the rain falls for 105.7 days and collects up to 16.69" (424mm) of precipitation.
When does it snow?
January through June, September through December are months with snowfall.
How much does it snow?
Throughout the year, there are 104.6 snowfall days, and 63.58" (1615mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.3h of sunshine.
When is the lowest UV index?
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the snowiest month?
The month with the most snowfall is March, when snow falls for 16 days and typically aggregates up to 12.17" (309mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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 rainiest month?
The month with the most rainfall is May, when the rain falls for 15.3 days and typically aggregates up to 2.28" (58mm) of precipitation.
When are the longest days?
The month with the longest days in Saint Charles is June, with an average of 15h and 12min of daylight.
What is the month with the highest UV index in Saint Charles?
The months with the highest UV index in Saint Charles are June and July, with an average maximum UV index of 5.
What time of the year is the hottest?
With an average high-temperature of 79.2°F (26.2°C) and an average low-temperature of 49.6°F (9.8°C), July is the warmest month.
What is the driest month?
The month with the least rainfall is July, when the rain falls for 8.5 days and typically collects 0.91" (23mm) of precipitation.
When it does not snow?
In Saint Charles, snow does not fall in July and August.
What are the months with the most sunshine?
July and August, with an average of 11.8h of sunshine, are months with the most sunshine in Saint Charles.
What is the least humid month in Saint Charles?
With an average relative humidity of 42%, August is the least humid month in Saint Charles.
What time of the year is the coldest?
Saint Charles reaches its average lowest temperatures in December, measuring 25.5°F (-3.6°C) at the peak and 9.9°F (-12.3°C) at the lowest.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Saint Charles, ID
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (25.5°F).
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is January (8.4°F).
Average pressure
Saint Charles, 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:
29.94"Hg - Average pressure in August:
29.94"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
Saint Charles, ID
- Average wind speed in January:
4.3mph - Average wind speed in February:
5mph - Average wind speed in March:
5mph - Average wind speed in April:
5.8mph - Average wind speed in May:
5.7mph - Average wind speed in June:
6mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.6mph - Average wind speed in September:
5.5mph - Average wind speed in October:
5.2mph - Average wind speed in November:
4.8mph - Average wind speed in December:
4.4mph
The windiest month (with the highest average wind speed) is June (6mph).
The calmest month (with the lowest average wind speed) is January (4.3mph).
Average humidity
Saint Charles, ID
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is August (42%).
Average rainfall
Saint Charles, ID
- Average rainfall in January:
1.34" - Average rainfall in February:
1.54" - Average rainfall in March:
1.77" - Average rainfall in April:
2.13" - Average rainfall in May:
2.28" - Average rainfall in June:
1.26"
- Average rainfall in July:
0.91" - Average rainfall in August:
1.02" - Average rainfall in September:
1.14" - Average rainfall in October:
1.06" - Average rainfall in November:
1.02" - Average rainfall in December:
1.22"
The wettest month (with the highest rainfall) is May (2.28").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days
Saint Charles, ID
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
5.7 days - Average rainfall days in March:
7.9 days - Average rainfall days in April:
13.4 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
10.8 days
- Average rainfall days in July:
8.5 days - Average rainfall days in August:
8.9 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
9.6 days - Average rainfall days in November:
6.3 days - Average rainfall days in December:
5.5 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (4.3 days).
Average snowfall
Saint Charles, ID
- Average snowfall in January:
10.91" - Average snowfall in February:
11.02" - Average snowfall in March:
12.17" - Average snowfall in April:
8.46" - Average snowfall in May:
1.93" - Average snowfall in June:
0.04"
The month with the highest snowfall is March (12.17").
The months with the least snowfall are July and August (0").
Average snowfall days
Saint Charles, ID
- Average snowfall days in January:
19.3 days - Average snowfall days in February:
20 days - Average snowfall days in March:
16 days - Average snowfall days in April:
11 days - Average snowfall days in May:
2.8 days - Average snowfall days in June:
0.2 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:
5.2 days - Average snowfall days in November:
11.1 days - Average snowfall days in December:
18.5 days
The month with the highest number of snowfall days is February (20 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Saint Charles, 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 1min - 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 2min - Average sunshine in March:
6h and 2min - Average sunshine in April:
9h and 0min - 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 0min - Average sunshine in November:
6h and 1min - Average sunshine in December:
4h and 4min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Saint Charles, ID
- Average sunshine days in January:
12.6 days - Average sunshine days in February:
8.6 days - Average sunshine days in March:
11.4 days - Average sunshine days in April:
9.4 days - Average sunshine days in May:
11 days - Average sunshine days in June:
16.8 days
- Average sunshine days in July:
18.4 days - Average sunshine days in August:
17.2 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
17.9 days - Average sunshine days in November:
17.7 days - Average sunshine days in December:
12.6 days
The month with the most sunshine days is July (18.4 days).
The month with the least sunshine days is February (8.6 days).
Average UV index
Saint Charles, 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
Saint Charles, ID
The month with the most cloud cover is February (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility
Saint Charles, 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).
Saint Charles, Idaho, USA
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