Expand
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
Climate and monthly weather forecast
Weather in January
January, the same as December, in Iona, Idaho, is a freezing cold winter month, with an average temperature varying between 28°F (-2.2°C) and 14.2°F (-9.9°C). As Iona steps into January, the average high-temperature holds at a still freezing cold 28°F (-2.2°C), hinting at a minor fluctuation from the prior month. Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Iona, Idaho, with an average temperature fluctuating between 18.1°F (-7.7°C) and 31.5°F (-0.3°C). February's arrival shows an average high-temperature of a still subzero cold 31.5°F (-0.3°C), hardly different from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Iona, is a chilly month, with an average temperature fluctuating between 43°F (6.1°C) and 27.9°F (-2.3°C). The onset of March marks an increase in the average high-temperature, moving from a freezing cold 31.5°F (-0.3°C) in February to a frosty 43°F (6.1°C). Weather in March »
Weather in April
April is a fresh spring month in Iona, Idaho, with temperature in the range of an average low of 34.3°F (1.3°C) and an average high of 53.6°F (12°C). April's onset witnesses a shift in the average high-temperature, moving from a frosty 43°F (6.1°C) in March to a cool 53.6°F (12°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in Iona, Idaho, with an average temperature ranging between max 64.4°F (18°C) and min 41.2°F (5.1°C). The arrival of May brings a change in Iona's weather, with average high-temperatures moving from April's cool 53.6°F (12°C) to a refreshing 64.4°F (18°C). Weather in May »
Weather in June
June, the first month of the summer in Iona, is a warm month, with temperature in the range of an average high of 75°F (23.9°C) and an average low of 47.1°F (8.4°C). Iona sees an increase in average high-temperatures during June, moving from an enjoyable 64.4°F (18°C) in May to a warm 75°F (23.9°C). Weather in June »
Weather in July
July in Iona, Idaho, is a hot summer month, with an average temperature fluctuating between 86.2°F (30.1°C) and 54.1°F (12.3°C). Iona's July weather, with an average high temperature of 86.2°F (30.1°C) and an average low temperature of 54.1°F (12.3°C), tends to be the warmest of the year. Weather in July »
Weather in August
August, the last month of the summer in Iona, is another warm month, with an average temperature varying between 84.4°F (29.1°C) and 54.3°F (12.4°C). Iona measures an average high-temperature of a moderately hot 84.4°F (29.1°C) in August, nearly consistent with the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Iona, Idaho, with temperature in the range of an average low of 49.5°F (9.7°C) and an average high of 73.6°F (23.1°C). With the onset of September, Iona's average high-temperature adjusts, receding from August's 84.4°F (29.1°C) to a still warm 73.6°F (23.1°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Iona, Idaho, with an average temperature ranging between max 55.6°F (13.1°C) and min 37.2°F (2.9°C). A clear decrease in the average high-temperature is observed during October, decreasing from a warm 73.6°F (23.1°C) in September to a moderate 55.6°F (13.1°C). Weather in October »
Weather in November
November, the last month of the autumn in Iona, is also an icy month, with temperature in the range of an average low of 26.1°F (-3.3°C) and an average high of 41.2°F (5.1°C). November witnesses a clear temperature decrease, falling from a mild 55.6°F (13.1°C) in October to an icy 41.2°F (5.1°C). Weather in November »
Weather in December
December, the first month of the winter in Iona, is also a subzero cold month, with an average temperature varying between 15.8°F (-9°C) and 27.9°F (-2.3°C). December is the month when Iona sees the lowest average temperatures, with a high of 27.9°F (-2.3°C) and a low of 15.8°F (-9°C). Weather in December »
Updated: Aug 5, 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 90%.
How many days does it rain?
In Iona, during the entire year, the rain falls for 84.3 days and collects up to 6.97" (177mm) of precipitation.
When does it snow?
January through May, September through December are months with snowfall.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 12.8 days and typically aggregates up to 3.86" (98mm) of snow.
How much does it snow?
Throughout the year, there are 54.4 snowfall days, and 16.89" (429mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.7h of sunshine.
When is the lowest UV index?
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
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 wettest months are May and September, with an average 0.83" (21mm) of rainfall.
When it does not snow?
June through August are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 24min of daylight.
What time of the year is the hottest?
July, characterized by an average high temperature of 86.2°F (30.1°C) and a low temperature of 54.1°F (12.3°C), is generally the warmest month.
What is the driest month?
The month with the least rainfall is July, when the rain falls for 6.6 days and typically collects 0.35" (9mm) of precipitation.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 11.8h of sunshine.
What is the month with the highest UV index?
The month with the highest UV index is July, with an average maximum UV index of 6.
What is the least humid month?
The least humid month is August, with an average relative humidity of 35%.
What are the coldest months?
The coldest month is December, with an average high-temperature of 27.9°F (-2.3°C) and an average low-temperature of 15.8°F (-9°C).
What is the month with the shortest days?
With an average of 9h and 0min of daylight, December has the shortest days of the year.
Average temperature
Iona, ID
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (27.9°F).
The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).
Average pressure
Iona, ID
- Average pressure in January:
30.3"Hg - Average pressure in February:
30.16"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.17"Hg - Average pressure in December:
30.26"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Iona, ID
- Average wind speed in January:
5.8mph - Average wind speed in February:
7.1mph - Average wind speed in March:
7.8mph - Average wind speed in April:
9mph - Average wind speed in May:
8.2mph - Average wind speed in June:
8.8mph
- Average wind speed in July:
7.6mph - Average wind speed in August:
7.2mph - Average wind speed in September:
7.6mph - Average wind speed in October:
7.5mph - Average wind speed in November:
7.1mph - Average wind speed in December:
6.1mph
The windiest month (with the highest average wind speed) is April (9mph).
The calmest month (with the lowest average wind speed) is January (5.8mph).
Average humidity
Iona, ID
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (35%).
Average rainfall
Iona, ID
- Average rainfall in January:
0.51" - Average rainfall in February:
0.43" - Average rainfall in March:
0.59" - Average rainfall in April:
0.63" - Average rainfall in May:
0.83" - Average rainfall in June:
0.59"
- Average rainfall in July:
0.35" - Average rainfall in August:
0.63" - Average rainfall in September:
0.83" - Average rainfall in October:
0.63" - Average rainfall in November:
0.47" - Average rainfall in December:
0.47"
The wettest months (with the highest rainfall) are May and September (0.83").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days
Iona, ID
- Average rainfall days in January:
3.7 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
8.3 days - Average rainfall days in April:
9.5 days - Average rainfall days in May:
10.7 days - Average rainfall days in June:
7.3 days
- Average rainfall days in July:
6.6 days - Average rainfall days in August:
8.1 days - Average rainfall days in September:
8.1 days - Average rainfall days in October:
7.2 days - Average rainfall days in November:
4.2 days - Average rainfall days in December:
5.5 days
The month with the highest number of rainy days is May (10.7 days).
The month with the least rainy days is January (3.7 days).
Average snowfall
Iona, ID
- Average snowfall in January:
3.86" - Average snowfall in February:
2.48" - Average snowfall in March:
2.83" - Average snowfall in April:
0.91" - Average snowfall in May:
0.59" - Average snowfall in June:
0"
The month with the highest snowfall is January (3.86").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Iona, ID
- Average snowfall days in January:
12.8 days - Average snowfall days in February:
11.3 days - Average snowfall days in March:
6.7 days - Average snowfall days in April:
3.3 days - Average snowfall days in May:
0.3 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:
1.3 days - Average snowfall days in November:
5.7 days - Average snowfall days in December:
12.9 days
The month with the highest number of snowfall days is December (12.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Iona, 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 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 0min - 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 4min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
5h and 3min - Average sunshine in March:
7h and 2min - Average sunshine in April:
9h and 5min - Average sunshine in May:
10h and 5min - Average sunshine in June:
11h and 4min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
11h and 4min - Average sunshine in September:
10h and 0min - Average sunshine in October:
7h and 2min - Average sunshine in November:
6h and 1min - Average sunshine in December:
5h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Iona, ID
- Average sunshine days in January:
18.4 days - Average sunshine days in February:
16.2 days - Average sunshine days in March:
18.2 days - Average sunshine days in April:
16.6 days - Average sunshine days in May:
18.3 days - Average sunshine days in June:
19.3 days
- Average sunshine days in July:
20.4 days - Average sunshine days in August:
18.2 days - Average sunshine days in September:
19.4 days - Average sunshine days in October:
22.1 days - Average sunshine days in November:
21.5 days - Average sunshine days in December:
17.5 days
The month with the most sunshine days is October (22.1 days).
The month with the least sunshine days is February (16.2 days).
Average UV index
Iona, ID
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover
Iona, ID
The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility
Iona, ID
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).