Climate and monthly weather forecast
Irwin, ID

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Weather in January

January, like December, is another subzero cold winter month in Irwin, Idaho, with an average temperature fluctuating between 26.1°F (-3.3°C) and 7.3°F (-13.7°C). The shift into January reveals an average high-temperature of a still subzero cold 26.1°F (-3.3°C), closely mirroring December's climate. Weather in January »

Weather in February

The last month of the winter, February, is another freezing cold month in Irwin, Idaho, with an average temperature varying between 27.3°F (-2.6°C) and 9.9°F (-12.3°C). The beginning of February reveals an average high-temperature of a still subzero cold 27.3°F (-2.6°C), showing minimal deviation from the previous month. Weather in February »

Weather in March

March, the first month of the spring in Irwin, is a cold month, with an average temperature fluctuating between 16.9°F (-8.4°C) and 33.8°F (1°C). The embrace of March brings a minor uplift in the average high-temperature, shifting from a freezing cold 27.3°F (-2.6°C) in February to an icy 33.8°F (1°C). Weather in March »

Weather in April

April, like March, in Irwin, Idaho, is a wintry spring month, with temperature in the range of an average low of 22.8°F (-5.1°C) and an average high of 42.1°F (5.6°C). April's arrival is noted with a slight increase in the average high-temperature, moving from a wintry 33.8°F (1°C) in March to a still icy 42.1°F (5.6°C). Weather in April »

Weather in May

May, the last month of the spring in Irwin, is a mild month, with temperature in the range of an average low of 31.3°F (-0.4°C) and an average high of 55.4°F (13°C). In Irwin, the average high-temperature in May increases from a wintry 42.1°F (5.6°C) in April to a moderate 55.4°F (13°C). Weather in May »

Weather in June

June, the first month of the summer in Irwin, is a refreshing month, with temperature in the range of an average high of 66.6°F (19.2°C) and an average low of 37.9°F (3.3°C). Irwin's weather in June shows a rise in the average high-temperature, moving up from May's refreshing 55.4°F (13°C) to an enjoyable 66.6°F (19.2°C). Weather in June »

Weather in July

July is a moderately hot summer month in Irwin, Idaho, with temperature in the range of an average high of 77.5°F (25.3°C) and an average low of 45.3°F (7.4°C). July registers as the month with the highest average temperatures, reaching 77.5°F (25.3°C) at its peak and 45.3°F (7.4°C) at the lowest. Weather in July »

Weather in August

August, the last month of the summer in Irwin, is another warm month, with an average temperature varying between 45.3°F (7.4°C) and 76.5°F (24.7°C). The arrival of August marks a slight shift to an average high-temperature of a still warm 76.5°F (24.7°C) from July's 77.5°F (25.3°C). Weather in August »

Weather in September

September, the first month of the autumn in Irwin, is still a refreshing month, with temperature in the range of an average low of 40.1°F (4.5°C) and an average high of 66.6°F (19.2°C). The beginning of September marks a decrease in the average high-temperature, transitioning from a moderately hot 76.5°F (24.7°C) in August to a refreshing 66.6°F (19.2°C). Weather in September »

Weather in October

October, the same as September, in Irwin, Idaho, is a frosty autumn month, with an average temperature ranging between max 48.9°F (9.4°C) and min 29.1°F (-1.6°C). A clear decrease in the average high-temperature is observed during October, decreasing from a refreshing 66.6°F (19.2°C) in September to a chilly 48.9°F (9.4°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cold month in Irwin, Idaho, with an average temperature varying between 18.5°F (-7.5°C) and 35.1°F (1.7°C). November's arrival coincides with a drop in the average high-temperature, decreasing from October's frosty 48.9°F (9.4°C) to a cold 35.1°F (1.7°C). Weather in November »

Weather in December

December, the first month of the winter in Irwin, is still a freezing cold month, with an average temperature ranging between min 8.8°F (-12.9°C) and max 24.3°F (-4.3°C). The coldest time of the year is December, with temperatures averaging a high of 24.3°F (-4.3°C) and a low of 8.8°F (-12.9°C). Weather in December »
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How much does it rain in Irwin?

In Irwin, during the entire year, the rain falls for 127 days and collects up to 24.29" (617mm) of precipitation.

When does it snow in Irwin?

January through June, September through December are months with snowfall in Irwin.

How much does it snow in Irwin?

Throughout the year, in Irwin, Idaho, there are 126.6 snowfall days, and 110.28" (2801mm) of snow is accumulated.

What are the months with the lowest UV index in Irwin?

January through March, November and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the most humid month in Irwin?

With an average relative humidity of 94%, February is the most humid month.

What is the rainiest month in Irwin?

February is the month with the most rainfall. Rain falls for 5.6 days and accumulates 2.91" (74mm) of precipitation.

When does it snow the most in Irwin?

February is the month with the most snowfall. Snow falls for 22.3 days and accumulates 22.91" (582mm) of snow.

What is the month with the least sunshine in Irwin?

With an average of 4h of sunshine, February has the least sunshine of the year in Irwin, Idaho.

When is Daylight Saving Time (DST) in Irwin?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Irwin, 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.

When are the longest days in Irwin?

With an average of 15h and 24min of daylight, June has the longest days of the year.

What time of the year is the hottest in Irwin?

With average temperatures fluctuating between a high of 77.5°F (25.3°C) and a low of 45.3°F (7.4°C), July stands out as the warmest month in Irwin.

What is the driest month in Irwin?

The month with the least rainfall in Irwin, Idaho, is July, when the rain falls for 10.4 days and typically collects 0.91" (23mm) of precipitation.

When it does not snow in Irwin?

July and August are months without snowfall in Irwin.

What month has the most sunshine in Irwin?

The month with the most sunshine is July, with an average of 11.9h of sunshine.

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

July is the month with the highest UV index, with an average maximum UV index of 5.

What is the least humid month in Irwin?

The least humid month is August, with an average relative humidity of 46%.

What are the coldest months in Irwin?

December, with its average high-temperature of 24.3°F (-4.3°C) and an average low-temperature of 8.8°F (-12.9°C), holds the record as the coldest month in Irwin.

What is the month with the shortest days in Irwin?

The month with the shortest days is December, with an average of 9h and 0min of daylight.

Average temperature
Irwin, ID

Average temperature - Irwin, ID

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is December (24.3°F).

The months with the highest average low temperature are July and August (45.3°F).
The coldest month (with the lowest average low temperature) is January (7.3°F).

Average pressure
Irwin, ID

Average pressure - Irwin, ID

The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed
Irwin, ID

Average wind speed - Irwin, ID

The windiest month (with the highest average wind speed) is June (5.7mph).
The calmest month (with the lowest average wind speed) is January (4.3mph).

Average humidity
Irwin, ID

Average humidity - Irwin, ID

The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (46%).

Average rainfall
Irwin, ID

Average rainfall - Irwin, ID

The wettest month (with the highest rainfall) is February (2.91").
The driest month (with the least rainfall) is July (0.91").

Average rainfall days
Irwin, ID

Average rainfall days - Irwin, ID

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (4.6 days).

Average snowfall
Irwin, ID

Average snowfall - Irwin, ID

The month with the highest snowfall is February (22.91").
The months with the least snowfall are July and August (0").

Average snowfall days
Irwin, ID

Average snowfall days - Irwin, ID

The months with the highest number of snowfall days are February and December (22.3 days).
The months with the least snowfall days are July and August (0 days).

Average daylight / Average sunshine
Irwin, ID

Average daylight / Average sunshine - Irwin, ID

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).

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).

Average sunshine days
Irwin, ID

Average sunshine days - Irwin, ID

The month with the most sunshine days is September (16.2 days).
The month with the least sunshine days is April (5.3 days).

Average UV index
Irwin, ID

Average UV index - Irwin, ID

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).

Average visibility
Irwin, ID

Average visibility - Irwin, 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).

Irwin, Idaho, USA

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