Climate and monthly weather forecast
Iona, ID

Weather in January

January, like December, is another subzero cold winter month in Iona, Idaho, with an average temperature varying between 14.2°F (-9.9°C) and 28°F (-2.2°C). In January, the average high-temperature is essentially the same as in December - a still freezing cold 28°F (-2.2°C). Weather in January »

Weather in February

February, the last month of the winter in Iona, is another freezing cold month, with an average temperature fluctuating between 18.1°F (-7.7°C) and 31.5°F (-0.3°C). In Iona, the average high-temperature in February is relatively the same as in January - a still subzero cold 31.5°F (-0.3°C). 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 27.9°F (-2.3°C) and 43°F (6.1°C). In Iona, the average high-temperature in March increases 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 in Iona, Idaho, is a cool spring month, 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). In Iona, Idaho, the average high-temperature in April rises from a frosty 43°F (6.1°C) in March to a fresh 53.6°F (12°C). Weather in April »

Weather in May

May, the last month of the spring in Iona, is an enjoyable month, with an average temperature varying between 64.4°F (18°C) and 41.2°F (5.1°C). In May, the average high-temperature increases from a cool 53.6°F (12°C) in April to a comfortable 64.4°F (18°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Iona, Idaho, with an average temperature fluctuating between 47.1°F (8.4°C) and 75°F (23.9°C). In June, the average high-temperature rises from an enjoyable 64.4°F (18°C) in May to a moderately hot 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 54.1°F (12.3°C) and 86.2°F (30.1°C). The warmest month is July, with an average high-temperature of 86.2°F (30.1°C) and an average low-temperature of 54.1°F (12.3°C). 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). In Iona, Idaho, the average high-temperature in August is practically the same as in July - a warm 84.4°F (29.1°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Iona, Idaho, with temperature in the range of an average high of 73.6°F (23.1°C) and an average low of 49.5°F (9.7°C). In September, the average high-temperature decreases from a warm 84.4°F (29.1°C) in August to a still moderately hot 73.6°F (23.1°C). Weather in September »

Weather in October

October, the same as September, in Iona, Idaho, is another mild autumn month, with an average temperature ranging between max 55.6°F (13.1°C) and min 37.2°F (2.9°C). In Iona, the average high-temperature in October plummets from a moderately hot 73.6°F (23.1°C) in September to a moderate 55.6°F (13.1°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a wintry month in Iona, Idaho, with an average temperature varying between 26.1°F (-3.3°C) and 41.2°F (5.1°C). In Iona, Idaho, the average high-temperature in November plummets from a moderate 55.6°F (13.1°C) in October to a cold 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 temperature in the range of an average high of 27.9°F (-2.3°C) and an average low of 15.8°F (-9°C). 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). Weather in December »
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FAQ

What is the most humid month in Iona?

With an average relative humidity of 90%, January is the most humid month in Iona, Idaho.

How much does it rain in Iona?

In Iona, Idaho, during the entire year, the rain falls for 84.3 days and collects up to 6.97" (177mm) of precipitation.

When does it snow in Iona?

January through May, September through December are months with snowfall.

What is the snowiest month in Iona?

The month with the most snowfall in Iona, Idaho, is January, when snow falls for 12.8 days and typically aggregates up to 3.86" (98mm) of snow.

How many days does it snow in Iona?

Throughout the year, in Iona, there are 54.4 snowfall days, and 16.89" (429mm) of snow is accumulated.

What is the month with the least sunshine in Iona?

The month with the least sunshine in Iona is January, with an average of 4.7h of sunshine.

What is the month with the lowest UV index in Iona?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Iona.

When is Daylight Saving Time (DST) in Iona?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Iona, Idaho, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from MDT to MST.

What is the rainiest month in Iona?

The months with the most rainfall are May and September, with an average 0.83" (21mm) of precipitation.

When it does not snow in Iona?

June through August are months without snowfall in Iona.

When are the longest days in Iona?

The month with the longest days in Iona is June, with an average of 15h and 22min of daylight.

What is the warmest month in Iona?

July is the warmest month, with an average high-temperature of 86.2°F (30.1°C) and an average low-temperature of 54.1°F (12.3°C).

What is the driest month in Iona?

The month with the least rainfall in Iona is July, when the rain falls for 6.6 days and typically collects 0.35" (9mm) of precipitation.

What month has the most sunshine in Iona?

With an average of 11.8h of sunshine, July has the most sunshine of the year.

What is the month with the highest UV index in Iona?

July is the month with the highest UV index, with an average maximum UV index of 6.

What is the least humid month in Iona?

August is the least humid month in Iona, Idaho, with an average relative humidity of 35%.

What is the coldest month in Iona?

December is the coldest month, 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 in Iona?

December has the shortest days of the year, with an average of 9h and 1min of daylight.

Average temperature
Iona, ID

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).

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Average pressure
Iona, ID

Average pressure - Iona, ID

The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed
Iona, ID

Average wind speed - Iona, ID

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).

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Average rainfall
Iona, ID

Average rainfall - Iona, ID

The wettest months (with the highest rainfall) are May and September (0.83").
The driest month (with the least rainfall) is July (0.35").

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Average rainfall days
Iona, ID

Average rainfall days - Iona, ID

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).

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Average snowfall
Iona, ID

Average snowfall - Iona, ID

The month with the highest snowfall is January (3.86").
The months with the least snowfall are June, July and August (0").

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Average snowfall days
Iona, ID

Average snowfall days - Iona, ID

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).

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Average daylight / Average sunshine
Iona, ID

Average daylight / Average sunshine - Iona, ID

The month with the longest days is June (Average daylight: 15h and 22min).
The month with the shortest days is December (Average daylight: 9h and 1min).

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).

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Average sunshine days
Iona, ID

Average sunshine days - Iona, ID

The month with the most sunshine days is October (22.1 days).
The month with the least sunshine days is February (16.2 days).

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Average UV index
Iona, ID

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).

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Average visibility
Iona, ID

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).

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