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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 Eighteenmile, Idaho, with temperature in the range of an average high of 24.1°F (-4.4°C) and an average low of 6.8°F (-14°C). Transitioning into January, Eighteenmile records an average high-temperature of a still freezing cold 24.1°F (-4.4°C), almost identical to December's 22.3°F (-5.4°C). Weather in January »
Weather in February
February, the last month of the winter in Eighteenmile, is also a subzero cold month, with an average temperature ranging between max 25.2°F (-3.8°C) and min 9.7°F (-12.4°C). February's beginning signals an average high-temperature of a still freezing cold 25.2°F (-3.8°C), barely different from January's 24.1°F (-4.4°C). Weather in February »
Weather in March
March, the first month of the spring in Eighteenmile, is a cold month, with temperature in the range of an average low of 16.9°F (-8.4°C) and an average high of 32.9°F (0.5°C). As February transitions into March, a subtle temperature shift is observed, with average highs adjusting from a freezing cold 25.2°F (-3.8°C) to a cold 32.9°F (0.5°C). Weather in March »
Weather in April
April, like March, in Eighteenmile, Idaho, is a wintry spring month, with temperature in the range of an average low of 23.9°F (-4.5°C) and an average high of 42.4°F (5.8°C). An upsurge in temperatures occurs as March gives way to April, with average highs shifting from a wintry 32.9°F (0.5°C) to a still icy 42.4°F (5.8°C). Weather in April »
Weather in May
May, the last month of the spring in Eighteenmile, is a mild month, with an average temperature fluctuating between 33.3°F (0.7°C) and 55.9°F (13.3°C). The arrival of May signals an increase in the average high-temperature, moving from a wintry 42.4°F (5.8°C) in April to a moderate 55.9°F (13.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a refreshing month in Eighteenmile, Idaho, with an average temperature varying between 39.4°F (4.1°C) and 66°F (18.9°C). The transition to June introduces an increase in the average high-temperature, shifting from a refreshing 55.9°F (13.3°C) in May to an enjoyable 66°F (18.9°C). Weather in June »
Weather in July
July in Eighteenmile, Idaho, is a moderately hot summer month, with an average temperature ranging between min 46°F (7.8°C) and max 77.4°F (25.2°C). Eighteenmile's warmest month, July, generally records average temperatures ranging from a high of 77.4°F (25.2°C) to a low of 46°F (7.8°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Eighteenmile, Idaho, with an average temperature fluctuating between 75.7°F (24.3°C) and 46.6°F (8.1°C). Welcoming August, Eighteenmile notes an average high-temperature of a still warm 75.7°F (24.3°C), nearly consistent with July's 77.4°F (25.2°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an enjoyable month in Eighteenmile, Idaho, with temperature in the range of an average high of 65.8°F (18.8°C) and an average low of 40.1°F (4.5°C). September's onset corresponds with a shift in the average high-temperature, moving from a warm 75.7°F (24.3°C) in August to a comfortable 65.8°F (18.8°C). Weather in September »
Weather in October
October, the same as September, in Eighteenmile, Idaho, is a frosty autumn month, with an average temperature varying between 28.9°F (-1.7°C) and 47.8°F (8.8°C). With the transition into October, Eighteenmile experiences a significant decrease in average high-temperatures, moving down from a refreshing 65.8°F (18.8°C) in September to a frosty 47.8°F (8.8°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a wintry month in Eighteenmile, Idaho, with temperature in the range of an average high of 33.1°F (0.6°C) and an average low of 17.2°F (-8.2°C). The start of November brings a distinct shift in the average high-temperature, dropping from October's chilly 47.8°F (8.8°C) to a cold 33.1°F (0.6°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Eighteenmile, Idaho, with an average temperature ranging between min 6.8°F (-14°C) and max 22.3°F (-5.4°C). December, known for its average high temperature of 22.3°F (-5.4°C) and an average low temperature of 6.8°F (-14°C), is the coldest month. Weather in December »
Updated: Aug 14, 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 months with the highest humidity are January and February, with an average relative humidity of 94%.
How many days does it rain?
In Eighteenmile, during the entire year, the rain falls for 106.1 days and collects up to 20.83" (529mm) of precipitation.
When does it snow?
Months with snowfall are January through July, September through December.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 21.8 days and typically aggregates up to 19.84" (504mm) of snow.
How many days does it snow in Eighteenmile?
In Eighteenmile, Idaho, during the entire year, snow falls for 138.1 days and aggregates up to 107.64" (2734mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.8h of sunshine.
What are the months with the lowest UV index?
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the rainiest month?
The month with the most rainfall in Eighteenmile is February, when the rain falls for 5.2 days and typically aggregates up to 2.64" (67mm) of precipitation.
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.
When are the longest days?
With an average of 15h and 30min of daylight, June has the longest days of the year.
What is the month with the highest UV index?
June and July, with an average maximum UV index of 5, are months with the highest UV index.
What is the warmest month?
Eighteenmile's warmest temperatures are experienced in July, with average high temperatures of 77.4°F (25.2°C) and lows of 46°F (7.8°C).
What is the driest month?
July is the month with the least rainfall. Rain falls for 6.8 days and accumulates 0.47" (12mm) of precipitation.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 12h of sunshine.
What is the least humid month?
With an average relative humidity of 47%, August is the least humid month.
When it does not snow?
August is the only month when snow does not fall.
What part of the year is the coldest?
In Eighteenmile, December is the month with the lowest recorded average temperatures, measuring a high of 22.3°F (-5.4°C) and a low of 6.8°F (-14°C).
What is the month with the shortest days?
December has the shortest days of the year, with an average of 8h and 54min of daylight.
Average temperature
Eighteenmile, ID
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is December (22.3°F).
The month with the highest average low temperature is August (46.6°F).
The coldest months (with the lowest average low temperature) are January and December (6.8°F).
Average pressure
Eighteenmile, ID
- Average pressure in January:
30.26"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.16"Hg - Average pressure in December:
30.24"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Eighteenmile, ID
- Average wind speed in January:
4.4mph - Average wind speed in February:
5.2mph - Average wind speed in March:
5.3mph - Average wind speed in April:
5.8mph - Average wind speed in May:
6mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
5.8mph - 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:
4.5mph
The windiest month (with the highest average wind speed) is June (6.3mph).
The calmest month (with the lowest average wind speed) is January (4.4mph).
Average humidity
Eighteenmile, ID
The months with the highest relative humidity are January and February (94%).
The month with the lowest relative humidity is August (47%).
Average rainfall
Eighteenmile, ID
- Average rainfall in January:
2.36" - Average rainfall in February:
2.64" - Average rainfall in March:
2.2" - Average rainfall in April:
2.48" - Average rainfall in May:
2.2" - Average rainfall in June:
2.01"
- Average rainfall in July:
0.47" - Average rainfall in August:
0.71" - Average rainfall in September:
1.14" - Average rainfall in October:
1.26" - Average rainfall in November:
1.38" - Average rainfall in December:
1.97"
The wettest month (with the highest rainfall) is February (2.64").
The driest month (with the least rainfall) is July (0.47").
Average rainfall days
Eighteenmile, ID
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
5.2 days - Average rainfall days in March:
9.8 days - Average rainfall days in April:
14.4 days - Average rainfall days in May:
17 days - Average rainfall days in June:
13.2 days
- Average rainfall days in July:
6.8 days - Average rainfall days in August:
8 days - Average rainfall days in September:
7.9 days - Average rainfall days in October:
8.4 days - Average rainfall days in November:
6.2 days - Average rainfall days in December:
5.4 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (3.8 days).
Average snowfall
Eighteenmile, ID
- Average snowfall in January:
19.84" - Average snowfall in February:
19.76" - Average snowfall in March:
16.69" - Average snowfall in April:
12.64" - Average snowfall in May:
4.8" - Average snowfall in June:
0.94"
The month with the highest snowfall is January (19.84").
The month with the least snowfall is August (0").
Average snowfall days
Eighteenmile, ID
- Average snowfall days in January:
21.8 days - Average snowfall days in February:
22.6 days - Average snowfall days in March:
22.8 days - Average snowfall days in April:
16.6 days - Average snowfall days in May:
5.7 days - Average snowfall days in June:
1.3 days
- Average snowfall days in July:
0.1 days - Average snowfall days in August:
0 days - Average snowfall days in September:
1.2 days - Average snowfall days in October:
6.5 days - Average snowfall days in November:
16.5 days - Average snowfall days in December:
23 days
The month with the highest number of snowfall days is December (23 days).
The month with the least snowfall days is August (0 days).
Average daylight / Average sunshine
Eighteenmile, ID
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 3min
- Average daylight in July:
15h and 1min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 1min - Average sunshine in March:
5h and 4min - Average sunshine in April:
8h and 4min - Average sunshine in May:
10h and 2min - Average sunshine in June:
10h and 5min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 4min - Average sunshine in September:
9h and 5min - Average sunshine in October:
6h and 5min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Eighteenmile, ID
- Average sunshine days in January:
9.5 days - Average sunshine days in February:
5.9 days - Average sunshine days in March:
6.8 days - Average sunshine days in April:
6.7 days - Average sunshine days in May:
9.3 days - Average sunshine days in June:
13.7 days
- Average sunshine days in July:
21.2 days - Average sunshine days in August:
20.3 days - Average sunshine days in September:
19.3 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
13.1 days - Average sunshine days in December:
7.7 days
The month with the most sunshine days is July (21.2 days).
The month with the least sunshine days is February (5.9 days).
Average UV index
Eighteenmile, ID
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover
Eighteenmile, ID
The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 13).
Average visibility
Eighteenmile, ID
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (3mi).
Eighteenmile, Idaho, USA
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