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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 O'Neill, Iowa, with temperature in the range of an average high of 24.3°F (-4.3°C) and an average low of 11.7°F (-11.3°C). January, with its high-temperature average of 24.3°F (-4.3°C) and a low-temperature average of 11.7°F (-11.3°C), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in O'Neill, Iowa, with an average temperature varying between 28.2°F (-2.1°C) and 14.5°F (-9.7°C). February's weather records an average high-temperature of a still subzero cold 28.2°F (-2.1°C), showing little deviation from January. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in O'Neill, Iowa, with an average temperature ranging between max 42.8°F (6°C) and min 28.2°F (-2.1°C). With the onset of March, O'Neill's average high-temperature witnesses a clear rise, advancing from February's freezing cold 28.2°F (-2.1°C) to a frosty 42.8°F (6°C). Weather in March »
Weather in April
April is a cool spring month in O'Neill, Iowa, with an average temperature ranging between min 38.7°F (3.7°C) and max 55°F (12.8°C). The shift from March to April brings an increase in the average high-temperature, moving from a frosty 42.8°F (6°C) to a fresh 55°F (12.8°C). Weather in April »
Weather in May
May, the last month of the spring in O'Neill, is an enjoyable month, with temperature in the range of an average low of 50°F (10°C) and an average high of 66.7°F (19.3°C). O'Neill's transition into May sees a rise in the average high-temperature, advancing from a fresh 55°F (12.8°C) in April to an enjoyable 66.7°F (19.3°C). Weather in May »
Weather in June
June, the first month of the summer in O'Neill, is a moderately hot month, with an average temperature fluctuating between 76.3°F (24.6°C) and 59.5°F (15.3°C). As May transitions into June, a change in temperatures is observed, with average highs moving from a refreshing 66.7°F (19.3°C) to a moderately hot 76.3°F (24.6°C). Weather in June »
Weather in July
July, like June, in O'Neill, Iowa, is another warm summer month, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 62.8°F (17.1°C). O'Neill's warmest month, July, generally records average temperatures ranging from a high of 79.7°F (26.5°C) to a low of 62.8°F (17.1°C). Weather in July »
Weather in August
August, the last month of the summer in O'Neill, is also a moderately hot month, with an average temperature ranging between max 78.4°F (25.8°C) and min 60.1°F (15.6°C). The ushering in of August brings an average high-temperature of a still moderately hot 78.4°F (25.8°C), closely mirroring the 79.7°F (26.5°C) of July. Weather in August »
Weather in September
September, the first month of the autumn in O'Neill, is still a pleasant month, with an average temperature varying between 53.2°F (11.8°C) and 72°F (22.2°C). September ushers in a minute temperature change, with average high-temperatures reducing from August's moderately hot 78.4°F (25.8°C) to a pleasant 72°F (22.2°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in O'Neill, Iowa, with temperature in the range of an average high of 57.7°F (14.3°C) and an average low of 41.5°F (5.3°C). The average high-temperature drops in October, from September's pleasant 72°F (22.2°C) to a refreshing 57.7°F (14.3°C). Weather in October »
Weather in November
November, the last month of the autumn in O'Neill, is also a frosty month, with temperature in the range of an average low of 30.2°F (-1°C) and an average high of 43.7°F (6.5°C). A change in temperatures is noted as October gives way to November, with average highs reducing from a moderate 57.7°F (14.3°C) to a chilly 43.7°F (6.5°C). Weather in November »
Weather in December
The first month of the winter, December, is still a freezing cold month in O'Neill, Iowa, with an average temperature fluctuating between 21°F (-6.1°C) and 31.3°F (-0.4°C). December's onset corresponds with a shift in the average high-temperature, moving from a frosty 43.7°F (6.5°C) in November to a freezing cold 31.3°F (-0.4°C). Weather in December »
Updated: Aug 30, 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 part of the year is the coldest?
January is the coldest month, exhibiting average temperatures of 24.3°F (-4.3°C) at the peak and 11.7°F (-11.3°C) at the base.
What is the most humid month?
With an average relative humidity of 88%, January is the most humid month.
How many days does it rain in O'Neill?
Throughout the year, there are 139.6 rainfall days, and 24.92" (633mm) of precipitation is accumulated.
When does it snow?
January through April, October through December are months with snowfall.
What is the snowiest month in O'Neill?
January is the month with the most snowfall. Snow falls for 13.7 days and accumulates 4.29" (109mm) of snow.
How many days does it snow?
Throughout the year, there are 52.1 snowfall days, and 16.54" (420mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 3.5h 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 in O'Neill are January, November and December, with an average maximum UV index of 1.
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 wettest months in O'Neill are May and June, with an average 3.54" (90mm) of rainfall.
When it does not snow in O'Neill?
In O'Neill, snow does not fall in May through September.
When is the highest UV index in O'Neill?
The months with the highest UV index are May through August, with an average maximum UV index of 5.
When are the longest days?
The month with the longest days is June, with an average of 15h and 18min of daylight.
What is the warmest month?
O'Neill's warmest weather arrives in July, when temperatures average a high of 79.7°F (26.5°C) and a low of 62.8°F (17.1°C).
What month has the most sunshine?
With an average of 9.9h of sunshine, July has the most sunshine of the year.
What is the least humid month?
With an average relative humidity of 75%, October is the least humid month.
What is the driest month?
The month with the least rainfall is December, when the rain falls for 5.9 days and typically collects 0.98" (25mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 6min of daylight.
Average temperature
O'Neill, IA
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (24.3°F).
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure
O'Neill, IA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
O'Neill, IA
- Average wind speed in January:
10.1mph - Average wind speed in February:
10mph - Average wind speed in March:
9.9mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.9mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.1mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity
O'Neill, IA
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (75%).
Average rainfall
O'Neill, IA
- Average rainfall in January:
1.02" - Average rainfall in February:
1.02" - Average rainfall in March:
1.46" - Average rainfall in April:
2.44" - Average rainfall in May:
3.54" - Average rainfall in June:
3.54"
- Average rainfall in July:
3.23" - Average rainfall in August:
1.97" - Average rainfall in September:
2.56" - Average rainfall in October:
1.89" - Average rainfall in November:
1.26" - Average rainfall in December:
0.98"
The wettest months (with the highest rainfall) are May and June (3.54").
The driest month (with the least rainfall) is December (0.98").
Average rainfall days
O'Neill, IA
- Average rainfall days in January:
4.5 days - Average rainfall days in February:
4.1 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
18.1 days
- Average rainfall days in July:
17 days - Average rainfall days in August:
13.9 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
10.9 days - Average rainfall days in November:
8.1 days - Average rainfall days in December:
5.9 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (4.1 days).
Average snowfall
O'Neill, IA
The month with the highest snowfall is January (4.29").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
O'Neill, IA
- Average snowfall days in January:
13.7 days - Average snowfall days in February:
11.9 days - Average snowfall days in March:
7.2 days - Average snowfall days in April:
2.6 days - Average snowfall days in May:
0.1 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:
1.3 days - Average snowfall days in November:
4.3 days - Average snowfall days in December:
11 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
O'Neill, IA
- Average daylight in January:
9h and 3min - 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 2min
- 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 0min - 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 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
3h and 3min - Average sunshine in February:
3h and 4min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 2min - Average sunshine in May:
8h and 1min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 2min - Average sunshine in November:
4h and 5min - Average sunshine in December:
3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days
O'Neill, IA
- Average sunshine days in January:
14.7 days - Average sunshine days in February:
13.3 days - Average sunshine days in March:
14.1 days - Average sunshine days in April:
11.3 days - Average sunshine days in May:
9.4 days - Average sunshine days in June:
9.7 days
- Average sunshine days in July:
10.7 days - Average sunshine days in August:
15.1 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
17.1 days - Average sunshine days in November:
17.9 days - Average sunshine days in December:
17.1 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is May (9.4 days).
Average UV index
O'Neill, IA
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover
O'Neill, IA
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
O'Neill, IA
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
O'Neill, Iowa, USA
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