Climate and monthly weather forecast
Walnut, IA

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Weather in January

January, like December, is another subzero cold winter month in Walnut, Iowa, with an average temperature ranging between max 28.8°F (-1.8°C) and min 15.4°F (-9.2°C). Walnut, Iowa, experiences its lowest average temperatures in January, reaching a peak of 28.8°F (-1.8°C) and a minimum of 15.4°F (-9.2°C). Weather in January »

Weather in February

February, the last month of the winter in Walnut, is a wintry month, with temperature in the range of an average high of 32.4°F (0.2°C) and an average low of 18.5°F (-7.5°C). Transitioning into February, Walnut records an average high-temperature of an icy 32.4°F (0.2°C), almost identical to January's 28.8°F (-1.8°C). Weather in February »

Weather in March

March, the first month of the spring in Walnut, is a frosty month, with temperature in the range of an average high of 48.2°F (9°C) and an average low of 32.5°F (0.3°C). With the onset of March, Walnut's average high-temperature witnesses a clear rise, advancing from February's wintry 32.4°F (0.2°C) to a chilly 48.2°F (9°C). Weather in March »

Weather in April

April is a refreshing spring month in Walnut, Iowa, with an average temperature varying between 42.4°F (5.8°C) and 59.9°F (15.5°C). The start of April is characterized by an increase in the average high-temperature, transitioning from a chilly 48.2°F (9°C) in March to a mild 59.9°F (15.5°C). Weather in April »

Weather in May

May, the last month of the spring in Walnut, is an agreeable month, with an average temperature varying between 53.4°F (11.9°C) and 70.3°F (21.3°C). An escalation in the average high-temperature is seen with the onset of May, moving from a moderate 59.9°F (15.5°C) in April to a pleasant 70.3°F (21.3°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Walnut, Iowa, with an average temperature fluctuating between 63.3°F (17.4°C) and 80.1°F (26.7°C). An upsurge in temperatures occurs as May gives way to June, with average highs shifting from a pleasant 70.3°F (21.3°C) to a warm 80.1°F (26.7°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Walnut, Iowa, with temperature in the range of an average high of 82.9°F (28.3°C) and an average low of 65.1°F (18.4°C). July temperatures tend to peak at an average high of 82.9°F (28.3°C) and dip to a low of 65.1°F (18.4°C). Throughout July, the heat index is appraised at a tropical 91.4°F (33°C). Weather in July »

Weather in August

August, the last month of the summer in Walnut, is another warm month, with an average temperature fluctuating between 81.1°F (27.3°C) and 62.2°F (16.8°C). The transition from July to August sees an average high-temperature of a still warm 81.1°F (27.3°C), indicating a minor variance from the prior month. Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Walnut, Iowa, with an average temperature ranging between max 75.6°F (24.2°C) and min 55.9°F (13.3°C). The arrival of September is marked by a minor reduction in average high-temperature, sliding from 81.1°F (27.3°C) in August to a still warm 75.6°F (24.2°C). Weather in September »

Weather in October

October, like September, in Walnut, Iowa, is another refreshing autumn month, with an average temperature fluctuating between 44.8°F (7.1°C) and 61°F (16.1°C). As September transitions into October, Walnut sees a clear drop in the average high-temperature, declining from a warm 75.6°F (24.2°C) to a refreshing 61°F (16.1°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Walnut, Iowa, with an average temperature ranging between max 47.3°F (8.5°C) and min 32.9°F (0.5°C). The arrival of November corresponds with a reduction in the average high-temperature, down from October's enjoyable 61°F (16.1°C) to a chilly 47.3°F (8.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also an icy month in Walnut, Iowa, with an average temperature fluctuating between 33.4°F (0.8°C) and 21.4°F (-5.9°C). In Walnut, entering December brings a temperature decrement, reducing from November's frosty 47.3°F (8.5°C) to a cold 33.4°F (0.8°C). Weather in December »
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Frequently asked questions

What is the coldest month in Walnut?

January, having an average high-temperature of 28.8°F (-1.8°C) and an average low-temperature of 15.4°F (-9.2°C), is the coldest month in Walnut, Iowa.

What is the most humid month in Walnut?

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

What is the driest month in Walnut?

January is the month with the least rainfall in Walnut, Iowa. Rain falls for 5.1 days and accumulates 0.87" (22mm) of precipitation.

How many days does it rain in Walnut?

In Walnut, during the entire year, the rain falls for 127.7 days and collects up to 26.57" (675mm) of precipitation.

When does it snow in Walnut?

Months with snowfall in Walnut are January through May, October through December.

How many days does it snow in Walnut?

Throughout the year, there are 35.8 snowfall days, and 13.82" (351mm) of snow is accumulated.

What is the month with the least sunshine in Walnut?

With an average of 4.6h of sunshine, January has the least sunshine of the year.

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

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Walnut, Iowa.

What is the snowiest month in Walnut?

The month with the most snowfall is February, when snow falls for 8.3 days and typically aggregates up to 3.7" (94mm) of snow.

When is Daylight Saving Time (DST) in Walnut?

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

The month with the most rainfall is June, when the rain falls for 16.9 days and typically aggregates up to 4.37" (111mm) of precipitation.

When it does not snow in Walnut?

In Walnut, snow does not fall in June through September.

When are the longest days in Walnut?

The month with the longest days is June, with an average of 15h and 6min of daylight.

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

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

What part of the year is the hottest in Walnut?

With average temperatures fluctuating between a high of 82.9°F (28.3°C) and a low of 65.1°F (18.4°C), July stands out as the warmest month in Walnut.

What month has the most sunshine in Walnut?

With an average of 10.4h of sunshine, July has the most sunshine of the year in Walnut.

What is the least humid month in Walnut?

October is the least humid month, with an average relative humidity of 68%.

What is the month with the shortest days in Walnut?

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

Average temperature
Walnut, IA

Average temperature - Walnut, IA

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (28.8°F).

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).

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Average pressure
Walnut, IA

Average pressure - Walnut, IA

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed
Walnut, IA

Average wind speed - Walnut, IA

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).

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Average rainfall
Walnut, IA

Average rainfall - Walnut, IA

The wettest month (with the highest rainfall) is June (4.37").
The driest month (with the least rainfall) is January (0.87").

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Average rainfall days
Walnut, IA

Average rainfall days - Walnut, IA

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is February (3.6 days).

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Average snowfall
Walnut, IA

Average snowfall - Walnut, IA

The month with the highest snowfall is February (3.7").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Walnut, IA

Average snowfall days - Walnut, IA

The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Walnut, IA

Average daylight / Average sunshine - Walnut, IA

The month with the longest days is June (Average daylight: 15h and 6min).
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 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days
Walnut, IA

Average sunshine days - Walnut, IA

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (11 days).

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Average UV index
Walnut, IA

Average UV index - Walnut, 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).

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Average visibility
Walnut, IA

Average visibility - Walnut, IA

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

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Walnut, Iowa, USA

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