Climate and monthly weather forecast
Marshalltown, IA

Weather in January

January, like December, is another subzero cold winter month in Marshalltown, Iowa, with an average temperature ranging between min 12.7°F (-10.7°C) and max 25.7°F (-3.5°C). The coldest month is January, with an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 12.7°F (-10.7°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Marshalltown, Iowa, with temperature in the range of an average low of 16.2°F (-8.8°C) and an average high of 29.8°F (-1.2°C). In February, the average high-temperature is almost the same as in January - a still freezing cold 29.8°F (-1.2°C). Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Marshalltown, Iowa, with temperature in the range of an average high of 44.8°F (7.1°C) and an average low of 30.2°F (-1°C). In March, the average high-temperature significantly increases from a freezing cold 29.8°F (-1.2°C) in February to a chilly 44.8°F (7.1°C). Weather in March »

Weather in April

April in Marshalltown, Iowa, is a mild spring month, with temperature in the range of an average low of 41.4°F (5.2°C) and an average high of 57.7°F (14.3°C). In April, the average high-temperature increases from a chilly 44.8°F (7.1°C) in March to a moderate 57.7°F (14.3°C). Weather in April »

Weather in May

May, the last month of the spring in Marshalltown, is an agreeable month, with an average temperature ranging between max 68.7°F (20.4°C) and min 52.2°F (11.2°C). In Marshalltown, the average high-temperature in May increases from a mild 57.7°F (14.3°C) in April to an agreeable 68.7°F (20.4°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Marshalltown, Iowa, with an average temperature varying between 78.3°F (25.7°C) and 62.2°F (16.8°C). In Marshalltown, the average high-temperature in June increases from a pleasant 68.7°F (20.4°C) in May to a warm 78.3°F (25.7°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Marshalltown, Iowa, with an average temperature ranging between min 64.4°F (18°C) and max 80.8°F (27.1°C). July is the warmest month, with an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 64.4°F (18°C). The average heat index in July is evaluated at a tropical 86°F (30°C). Weather in July »

Weather in August

August, the last month of the summer in Marshalltown, is another warm month, with an average temperature fluctuating between 79.2°F (26.2°C) and 61.2°F (16.2°C). In August, the average high-temperature is essentially the same as in July - a still warm 79.2°F (26.2°C). Weather in August »

Weather in September

September, the first month of the autumn in Marshalltown, is also a moderately hot month, with an average temperature varying between 74.5°F (23.6°C) and 55.2°F (12.9°C). In September, the average high-temperature is relatively the same as in August - a still warm 74.5°F (23.6°C). Weather in September »

Weather in October

October, the same as September, in Marshalltown, Iowa, is a moderate autumn month, with an average temperature varying between 59.4°F (15.2°C) and 43.9°F (6.6°C). In Marshalltown, the average high-temperature in October declines considerably from a warm 74.5°F (23.6°C) in September to a mild 59.4°F (15.2°C). Weather in October »

Weather in November

November, the last month of the autumn in Marshalltown, is another chilly month, with an average temperature varying between 45.1°F (7.3°C) and 31.5°F (-0.3°C). In Marshalltown, the average high-temperature in November decreases from a moderate 59.4°F (15.2°C) in October to a chilly 45.1°F (7.3°C). Weather in November »

Weather in December

December, the first month of the winter in Marshalltown, is still a cold month, with temperature in the range of an average low of 21°F (-6.1°C) and an average high of 32°F (0°C). In Marshalltown, Iowa, the average high-temperature in December drops from a chilly 45.1°F (7.3°C) in November to a wintry 32°F (0°C). Weather in December »
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FAQ

What is the coldest month in Marshalltown?

The coldest month in Marshalltown is January, with an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 12.7°F (-10.7°C).

What is the most humid month in Marshalltown?

January is the most humid month, with an average relative humidity of 86%.

What is the driest month in Marshalltown?

The month with the least rainfall is January, when the rain falls for 3.6 days and typically collects 0.43" (11mm) of precipitation.

How much does it rain in Marshalltown?

In Marshalltown, Iowa, during the entire year, the rain falls for 118.2 days and collects up to 16.18" (411mm) of precipitation.

When does it snow in Marshalltown?

January through May, October through December are months with snowfall in Marshalltown.

When does it snow the most in Marshalltown?

January is the month with the most snowfall in Marshalltown. Snow falls for 9.8 days and accumulates 1.93" (49mm) of snow.

How many days does it snow in Marshalltown?

Throughout the year, in Marshalltown, there are 34.6 snowfall days, and 6.97" (177mm) of snow is accumulated.

What is the month with the least sunshine in Marshalltown?

January has the least sunshine of the year in Marshalltown, with an average of 3.9h of sunshine.

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

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

When is Daylight Saving Time (DST) in Marshalltown?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Marshalltown, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from CDT to CST.

What is the wettest month in Marshalltown?

The month with the most rainfall is June, when the rain falls for 15.7 days and typically aggregates up to 2.56" (65mm) of precipitation.

When it does not snow in Marshalltown?

In Marshalltown, Iowa, snow does not fall in June through September.

When are the longest days in Marshalltown?

June has the longest days of the year in Marshalltown, Iowa, with an average of 15h and 12min of daylight.

What are the months with the highest UV index in Marshalltown?

The months with the highest UV index in Marshalltown, Iowa, are June and July, with an average maximum UV index of 6.

What is the warmest month in Marshalltown?

With an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 64.4°F (18°C), July is the warmest month in Marshalltown, Iowa.

What month has the most sunshine in Marshalltown?

The month with the most sunshine is July, with an average of 10h of sunshine.

What is the least humid month in Marshalltown?

The least humid month in Marshalltown is October, with an average relative humidity of 72%.

What is the month with the shortest days in Marshalltown?

The month with the shortest days in Marshalltown, Iowa, is December, with an average of 9h and 10min of daylight.

Average temperature
Marshalltown, IA

Average temperature - Marshalltown, IA

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (25.7°F).

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).

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Average pressure
Marshalltown, IA

Average pressure - Marshalltown, IA

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed
Marshalltown, IA

Average wind speed - Marshalltown, IA

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average humidity
Marshalltown, IA

Average humidity - Marshalltown, IA

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (72%).

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Average rainfall
Marshalltown, IA

Average rainfall - Marshalltown, IA

The wettest month (with the highest rainfall) is June (2.56").
The driest month (with the least rainfall) is January (0.43").

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Average rainfall days
Marshalltown, IA

Average rainfall days - Marshalltown, IA

The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is February (2.8 days).

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Average snowfall
Marshalltown, IA

Average snowfall - Marshalltown, IA

The month with the highest snowfall is January (1.93").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Marshalltown, IA

Average snowfall days - Marshalltown, 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
Marshalltown, IA

Average daylight / Average sunshine - Marshalltown, 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 10min).

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days
Marshalltown, IA

Average sunshine days - Marshalltown, IA

The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is June (12.2 days).

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Average UV index
Marshalltown, IA

Average UV index - Marshalltown, IA

The months with the highest UV index are June and July (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
Marshalltown, IA

Average visibility - Marshalltown, IA

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

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