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
Weather in January
January, like December, is another subzero cold winter month in Irwin, Iowa, with an average temperature fluctuating between 14.5°F (-9.7°C) and 27.3°F (-2.6°C). January stands out as Irwin's coldest month, with temperatures ranging between an average high of 27.3°F (-2.6°C) and a low of 14.5°F (-9.7°C). Weather in January »
Weather in February
February, the last month of the winter in Irwin, is also a subzero cold month, with an average temperature varying between 31.5°F (-0.3°C) and 18°F (-7.8°C). On the advent of February, Irwin's average high-temperature exhibits a minor adjustment to a still subzero cold 31.5°F (-0.3°C) from January's 27.3°F (-2.6°C). Weather in February »
Weather in March
March, the first month of the spring in Irwin, is a chilly month, with temperature in the range of an average high of 46.9°F (8.3°C) and an average low of 31.8°F (-0.1°C). March signals a clear temperature escalation, with average high-temperatures advancing from February's subzero cold 31.5°F (-0.3°C) to a frosty 46.9°F (8.3°C). Weather in March »
Weather in April
April is a refreshing spring month in Irwin, Iowa, with an average temperature fluctuating between 58.8°F (14.9°C) and 42.3°F (5.7°C). As April arrives, a rise in the average high-temperature is observed, moving from a chilly 46.9°F (8.3°C) in March to a refreshing 58.8°F (14.9°C). Weather in April »
Weather in May
May, the last month of the spring in Irwin, is an agreeable month, with an average temperature ranging between min 52.9°F (11.6°C) and max 69.4°F (20.8°C). May's onset brings a rise in the average high-temperature, moving from a refreshing 58.8°F (14.9°C) in April to an agreeable 69.4°F (20.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Irwin, Iowa, with an average temperature fluctuating between 79.3°F (26.3°C) and 63°F (17.2°C). Irwin's weather in June shows a rise in the average high-temperature, moving up from May's agreeable 69.4°F (20.8°C) to a moderately hot 79.3°F (26.3°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Irwin, Iowa, with an average temperature varying between 64.9°F (18.3°C) and 82.6°F (28.1°C). July is the warmest month, with an average high-temperature of 82.6°F (28.1°C) and an average low-temperature of 64.9°F (18.3°C). The heat index value during July is computed to be a hot 89.6°F (32°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Irwin, Iowa, with temperature in the range of an average low of 62.1°F (16.7°C) and an average high of 80.2°F (26.8°C). With the onset of August, a modest change to a still warm 80.2°F (26.8°C) from July's 82.6°F (28.1°C) is noted in high-temperature. Weather in August »
Weather in September
September, the first month of the autumn in Irwin, is still a warm month, with an average temperature varying between 55.9°F (13.3°C) and 75°F (23.9°C). Irwin's weather in September, with an average high-temperature of a still warm 75°F (23.9°C), subtly shifts from August's 80.2°F (26.8°C). Weather in September »
Weather in October
October, the same as September, in Irwin, Iowa, is another mild autumn month, with an average temperature varying between 59.7°F (15.4°C) and 44.1°F (6.7°C). Irwin's October weather is characterized by a distinct downswing in high-temperatures, falling from September's moderately hot 75°F (23.9°C) to a mild 59.7°F (15.4°C). Weather in October »
Weather in November
November, the last month of the autumn in Irwin, is also a frosty month, with an average temperature fluctuating between 46.2°F (7.9°C) and 32.2°F (0.1°C). The onset of November coincides with a reduction in the average high-temperature, falling from a refreshing 59.7°F (15.4°C) in October to a chilly 46.2°F (7.9°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Irwin, Iowa, with temperature in the range of an average low of 20.8°F (-6.2°C) and an average high of 32.2°F (0.1°C). Irwin's transition into December involves a shift in temperature, receding from a frosty 46.2°F (7.9°C) in November to a cold 32.2°F (0.1°C). Weather in December »
Updated: Aug 4, 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 are the coldest months?
Temperature records mark January as the coldest month, with highs averaging 27.3°F (-2.6°C) and lows at 14.5°F (-9.7°C).
What is the most humid month?
The most humid month is January, with an average relative humidity of 83%.
What is the driest month?
January is the month with the least rainfall. Rain falls for 3.2 days and accumulates 0.43" (11mm) of precipitation.
How many days does it rain?
In Irwin, during the entire year, the rain falls for 113.5 days and collects up to 15.71" (399mm) of precipitation.
When does it snow?
Months with snowfall are January through May, October through December.
How many days does it snow?
In Irwin, during the entire year, snow falls for 31.5 days and aggregates up to 7.13" (181mm) of snow.
What is the month with the least sunshine?
With an average of 4.5h of sunshine, January has the least sunshine of the year.
What are the months with the lowest UV index?
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2.
When does it snow the most in Irwin?
The month with the most snowfall is February, when snow falls for 7.3 days and typically aggregates up to 2.09" (53mm) of snow.
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 CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the wettest month?
The month with the most rainfall is June, when the rain falls for 16.1 days and typically aggregates up to 2.64" (67mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
With an average of 15h and 12min of daylight, June has the longest days of the year.
What are the months with the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the hottest time of year?
July, known for its average high temperature of 82.6°F (28.1°C) and an average low temperature of 64.9°F (18.3°C), is the warmest month.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.4h of sunshine.
What is the least humid month?
With an average relative humidity of 68%, October is the least humid month.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Irwin, IA
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (27.3°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure
Irwin, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed
Irwin, IA
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.7mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.5mph
- Average wind speed in July:
7.2mph - Average wind speed in August:
7.4mph - Average wind speed in September:
8.5mph - Average wind speed in October:
9.7mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity
Irwin, IA
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (68%).
Average rainfall
Irwin, IA
- Average rainfall in January:
0.43" - Average rainfall in February:
0.47" - Average rainfall in March:
0.91" - Average rainfall in April:
1.26" - Average rainfall in May:
2.6" - Average rainfall in June:
2.64"
- Average rainfall in July:
1.5" - Average rainfall in August:
1.93" - Average rainfall in September:
1.65" - Average rainfall in October:
1.06" - Average rainfall in November:
0.55" - Average rainfall in December:
0.71"
The wettest month (with the highest rainfall) is June (2.64").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days
Irwin, IA
- Average rainfall days in January:
3.2 days - Average rainfall days in February:
2.8 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
12.8 days - Average rainfall days in May:
15.7 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
13.1 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
5.5 days - Average rainfall days in December:
4.2 days
The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is February (2.8 days).
Average snowfall
Irwin, IA
- Average snowfall in January:
1.57" - Average snowfall in February:
2.09" - Average snowfall in March:
1.22" - Average snowfall in April:
0.28" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Irwin, IA
- Average snowfall days in January:
8.3 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
4.8 days - Average snowfall days in April:
1 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 days - Average snowfall days in October:
0.7 days - Average snowfall days in November:
3 days - Average snowfall days in December:
6.1 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Irwin, IA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
4h and 3min - Average sunshine in February:
5h and 1min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 5min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 5min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days
Irwin, IA
- Average sunshine days in January:
20.1 days - Average sunshine days in February:
17.8 days - Average sunshine days in March:
17.9 days - Average sunshine days in April:
15 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
11.4 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
15.5 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
20.5 days - Average sunshine days in November:
21.3 days - Average sunshine days in December:
21.6 days
The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (11.4 days).
Average UV index
Irwin, IA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover
Irwin, IA
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility
Irwin, IA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Irwin, Iowa, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location