Climate and monthly weather forecast
Onawa, IA

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Weather in January

January, like December, is a freezing cold winter month in Onawa, Iowa, with an average temperature ranging between min 15.1°F (-9.4°C) and max 28°F (-2.2°C). January, with an average high of 28°F (-2.2°C) and a low of 15.1°F (-9.4°C), signifies the coldest month of the year. Weather in January »

Weather in February

The last month of the winter, February, is a wintry month in Onawa, Iowa, with an average temperature fluctuating between 32.2°F (0.1°C) and 18.3°F (-7.6°C). The shift into February reveals an average high-temperature of a wintry 32.2°F (0.1°C), closely mirroring January's climate. Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Onawa, Iowa, with temperature in the range of an average high of 47.8°F (8.8°C) and an average low of 31.8°F (-0.1°C). Onawa sees a considerable increase in average high-temperatures during March, surging from a cold 32.2°F (0.1°C) in February to a chilly 47.8°F (8.8°C). Weather in March »

Weather in April

April in Onawa, Iowa, is a mild spring month, with an average temperature varying between 59.4°F (15.2°C) and 42.1°F (5.6°C). As March transitions into April, a change in temperatures is observed, with average highs moving from a frosty 47.8°F (8.8°C) to a refreshing 59.4°F (15.2°C). Weather in April »

Weather in May

May, the last month of the spring in Onawa, is an agreeable month, with an average temperature fluctuating between 53.2°F (11.8°C) and 70.3°F (21.3°C). The transition from April to May brings a temperature rise, with average high-temperatures increasing from a refreshing 59.4°F (15.2°C) to an agreeable 70.3°F (21.3°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Onawa, Iowa, with an average temperature varying between 80.2°F (26.8°C) and 63.1°F (17.3°C). As Onawa enters June, the average high-temperature increases from the an agreeable 70.3°F (21.3°C) of May to a warm 80.2°F (26.8°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Onawa, Iowa, with an average temperature ranging between min 65.5°F (18.6°C) and max 83.8°F (28.8°C). July brings the highest temperatures, with an average high of 83.8°F (28.8°C) and an average low of 65.5°F (18.6°C). The heat index value during July is calculated to be a tropical 91.4°F (33°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Onawa, Iowa, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 82°F (27.8°C). August brings an average high-temperature of a still warm 82°F (27.8°C), nearly identical to the preceding month. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Onawa, Iowa, with temperature in the range of an average high of 76.1°F (24.5°C) and an average low of 56.3°F (13.5°C). Onawa observes a small decrease in the average high-temperature with the arrival of September, falling from August's warm 82°F (27.8°C) to a still moderately hot 76.1°F (24.5°C). Weather in September »

Weather in October

October, like September, is a moderate autumn month in Onawa, Iowa, with an average temperature ranging between max 60.6°F (15.9°C) and min 44.4°F (6.9°C). The shift from September to October sees a distinct decrease in the average high-temperature, dropping from a warm 76.1°F (24.5°C) to a refreshing 60.6°F (15.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Onawa, Iowa, with an average temperature fluctuating between 47.3°F (8.5°C) and 32.7°F (0.4°C). Transition into November marks a drop in the average high-temperature, moving from a moderate 60.6°F (15.9°C) in October to a chilly 47.3°F (8.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Onawa, Iowa, with temperature in the range of an average high of 32.2°F (0.1°C) and an average low of 20.3°F (-6.5°C). In December, the meteorological conditions markedly change with the average high-temperature descending from a frosty 47.3°F (8.5°C) in November to a wintry 32.2°F (0.1°C). Weather in December »
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Frequently asked questions

What part of the year is the coldest in Onawa?

Onawa's coldest month, January, generally records average temperatures ranging from a high of 28°F (-2.2°C) to a low of 15.1°F (-9.4°C).

What is the most humid month in Onawa?

January is the most humid month, with an average relative humidity of 82%.

What is the driest month in Onawa?

The month with the least rainfall is January, when the rain falls for 2.9 days and typically collects 0.67" (17mm) of precipitation.

How much does it rain in Onawa?

Throughout the year, in Onawa, there are 117.6 rainfall days, and 21.89" (556mm) of precipitation is accumulated.

When does it snow in Onawa?

Months with snowfall in Onawa, Iowa, are January through April, October through December.

How many days does it snow in Onawa?

Throughout the year, there are 32.9 snowfall days, and 11.69" (297mm) of snow is accumulated.

What is the month with the least sunshine in Onawa?

The month with the least sunshine in Onawa is January, with an average of 4.4h of sunshine.

What is the snowiest month in Onawa?

The month with the most snowfall in Onawa, Iowa, is February, when snow falls for 7.5 days and typically aggregates up to 3.03" (77mm) of snow.

When is the lowest UV index in Onawa?

February and December, with an average maximum UV index of 1, are months with the lowest UV index.

When is Daylight Saving Time (DST) in Onawa?

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 are the least humid months in Onawa?

The months with the lowest humidity are April and October, with an average relative humidity of 66%.

What is the wettest month in Onawa?

The month with the most rainfall in Onawa is May, when the rain falls for 16.6 days and typically aggregates up to 3.31" (84mm) of precipitation.

When it does not snow in Onawa?

May through September are months without snowfall in Onawa.

When are the longest days in Onawa?

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 in Onawa?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

What is the warmest month in Onawa?

July is the warmest month, with an average high-temperature of 83.8°F (28.8°C) and an average low-temperature of 65.5°F (18.6°C).

What month has the most sunshine in Onawa?

With an average of 10.6h of sunshine, July has the most sunshine of the year.

What is the month with the shortest days in Onawa?

December has the shortest days of the year in Onawa, Iowa, with an average of 9h and 12min of daylight.

Average pressure
Onawa, IA

Average pressure - Onawa, IA

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed
Onawa, IA

Average wind speed - Onawa, IA

The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).

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Average humidity
Onawa, IA

Average humidity - Onawa, IA

The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are April and October (66%).

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Average rainfall
Onawa, IA

Average rainfall - Onawa, IA

The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (0.67").

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Average rainfall days
Onawa, IA

Average rainfall days - Onawa, IA

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (2.7 days).

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Average snowfall
Onawa, IA

Average snowfall - Onawa, IA

The month with the highest snowfall is February (3.03").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Onawa, IA

Average snowfall days - Onawa, IA

The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Onawa, IA

Average daylight / Average sunshine - Onawa, IA

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).

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days
Onawa, IA

Average sunshine days - Onawa, IA

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (12 days).

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Average visibility
Onawa, IA

Average visibility - Onawa, 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).

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Onawa, Iowa, USA

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