Climate and monthly weather forecastIrwin, ID
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Irwin, Idaho, with an average temperature varying between 7.3°F (-13.7°C) and 26.1°F (-3.3°C). The average high-temperature during January is a still freezing cold 26.1°F (-3.3°C), almost matching the conditions of the preceding month. 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 ranging between max 27.3°F (-2.6°C) and min 9.9°F (-12.3°C). On the advent of February, Irwin's average high-temperature exhibits a minor adjustment to a still freezing cold 27.3°F (-2.6°C) from January's 26.1°F (-3.3°C). Weather in February »Weather in March
The first month of the spring, March, is a cold month in Irwin, Idaho, with an average temperature varying between 16.9°F (-8.4°C) and 33.8°F (1°C). March signifies a subtle uplift in the average high-temperature, adjusting from a subzero cold 27.3°F (-2.6°C) in February to a cold 33.8°F (1°C). Weather in March »Weather in April
April, like March, in Irwin, Idaho, is a wintry spring month, with an average temperature varying between 22.8°F (-5.1°C) and 42.1°F (5.6°C). The arrival of April brings a soft temperature shift, with the average high-temperature nudging from a wintry 33.8°F (1°C) in March to a still cold 42.1°F (5.6°C). Weather in April »Weather in May
May, the last month of the spring in Irwin, is a moderate month, with an average temperature varying between 31.3°F (-0.4°C) and 55.4°F (13°C). May brings an increase in the average high-temperature, progressing from a wintry 42.1°F (5.6°C) in April to a mild 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 an average temperature varying between 66.6°F (19.2°C) and 37.9°F (3.3°C). June's arrival coincides with a rise in the average high-temperature, moving from May's moderate 55.4°F (13°C) to a still refreshing 66.6°F (19.2°C). Weather in June »Weather in July
July in Irwin, Idaho, is a warm summer month, with an average temperature ranging between min 45.3°F (7.4°C) and max 77.5°F (25.3°C). Irwin's July weather, with an average high temperature of 77.5°F (25.3°C) and an average low temperature of 45.3°F (7.4°C), tends to be the warmest of the year. 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 76.5°F (24.7°C) and 45.3°F (7.4°C). Irwin's average high-temperature marks a still moderately hot 76.5°F (24.7°C) with the advent of August, closely mirroring that of the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is still a comfortable month in Irwin, Idaho, with an average temperature ranging between max 66.6°F (19.2°C) and min 40.1°F (4.5°C). Irwin's weather changes with the onset of September, slightly falling from a warm 76.5°F (24.7°C) in August to a comfortable 66.6°F (19.2°C). Weather in September »Weather in October
October, the same as September, in Irwin, Idaho, is another chilly autumn month, with temperature in the range of an average high of 48.9°F (9.4°C) and an average low of 29.1°F (-1.6°C). With the onset of October, Irwin's weather experiences a distinct temperature drop, moving 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 also a wintry month in Irwin, Idaho, with temperature in the range of an average low of 18.5°F (-7.5°C) and an average high of 35.1°F (1.7°C). The onset of November coincides with a reduction in the average high-temperature, falling from a frosty 48.9°F (9.4°C) in October 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). December, characterized by an average high temperature of 24.3°F (-4.3°C) and a low temperature of 8.8°F (-12.9°C), is generally the coldest month. Weather in December »Updated: Jul 1, 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
Throughout the year, there are 127 rainfall days, and 24.29" (617mm) of precipitation is accumulated.
Months with snowfall are January through June, September through December.
Throughout the year, there are 126.6 snowfall days, and 110.28" (2801mm) of snow is accumulated.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 1.
The most humid month is February, with an average relative humidity of 94%.
The month with the most rainfall is February, when the rain falls for 5.6 days and typically aggregates up to 2.91" (74mm) of precipitation.
February is the month with the most snowfall. Snow falls for 22.3 days and accumulates 22.91" (582mm) of snow.
The month with the least sunshine is February, with an average of 4h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Irwin, 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.
June has the longest days of the year, with an average of 15h and 24min of daylight.
With average high and low temperatures of 77.5°F (25.3°C) and 45.3°F (7.4°C) respectively, July is Irwin's warmest month.
The month with the least rainfall is July, when the rain falls for 10.4 days and typically collects 0.91" (23mm) of precipitation.
July and August are months without snowfall.
With an average of 11.9h of sunshine, July has the most sunshine of the year.
The month with the highest UV index is July, with an average maximum UV index of 5.
August is the least humid month, with an average relative humidity of 46%.
December is the coldest month, with an average high-temperature of 24.3°F (-4.3°C) and an average low-temperature of 8.8°F (-12.9°C).
With an average of 9h and 0min of daylight, December has the shortest days of the year.
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 in January:
30.28"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:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.16"Hg - Average pressure in December:
30.25"Hg
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 in January:
4.3mph - Average wind speed in February:
4.9mph - Average wind speed in March:
5mph - Average wind speed in April:
5mph - Average wind speed in May:
5mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.4mph - Average wind speed in September:
5.2mph - Average wind speed in October:
4.8mph - Average wind speed in November:
4.7mph - Average wind speed in December:
4.4mph
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
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 in January:
2.64" - Average rainfall in February:
2.91" - Average rainfall in March:
2.32" - Average rainfall in April:
2.83" - Average rainfall in May:
2.52" - Average rainfall in June:
2.2"
- Average rainfall in July:
0.91" - Average rainfall in August:
0.94" - Average rainfall in September:
1.46" - Average rainfall in October:
1.65" - Average rainfall in November:
1.89" - Average rainfall in December:
2.01"
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 in January:
4.6 days - Average rainfall days in February:
5.6 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
16.6 days - Average rainfall days in May:
17.9 days - Average rainfall days in June:
14.1 days
- Average rainfall days in July:
10.4 days - Average rainfall days in August:
10.6 days - Average rainfall days in September:
11.1 days - Average rainfall days in October:
11.8 days - Average rainfall days in November:
6.7 days - Average rainfall days in December:
5.8 days
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 in January:
22.09" - Average snowfall in February:
22.91" - Average snowfall in March:
15.55" - Average snowfall in April:
11.77" - Average snowfall in May:
2.87" - Average snowfall in June:
0.28"
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 in January:
20.6 days - Average snowfall days in February:
22.3 days - Average snowfall days in March:
19.9 days - Average snowfall days in April:
14.8 days - Average snowfall days in May:
4.1 days - Average snowfall days in June:
0.7 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:
7.1 days - Average snowfall days in November:
14.3 days - Average snowfall days in December:
22.3 days
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 in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 24min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - 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 6min - Average sunshine in February:
4h and 0min - Average sunshine in March:
5h and 24min - Average sunshine in April:
8h and 12min - Average sunshine in May:
10h and 6min - Average sunshine in June:
11h and 6min
- Average sunshine in July:
11h and 54min - Average sunshine in August:
11h and 42min - Average sunshine in September:
10h and 6min - Average sunshine in October:
6h and 36min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 12min
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 in January:
10.4 days - Average sunshine days in February:
5.8 days - Average sunshine days in March:
6.3 days - Average sunshine days in April:
5.3 days - Average sunshine days in May:
7.8 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
16.1 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
16.2 days - Average sunshine days in October:
15 days - Average sunshine days in November:
13.1 days - Average sunshine days in December:
9.3 days
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
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 cloud cover
Irwin, ID
The month with the most cloud cover is February (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 13).
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).
