Climate and monthly weather forecast
Cromwell, IA

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Weather in January

January, like December, is another subzero cold winter month in Cromwell, Iowa, with an average temperature fluctuating between 29.1°F (-1.6°C) and 15.8°F (-9°C). January, with average temperatures reaching a high of 29.1°F (-1.6°C) and a low of 15.8°F (-9°C), is the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Cromwell, is a cold month, with an average temperature ranging between min 18.9°F (-7.3°C) and max 33.3°F (0.7°C). Cromwell experiences a subtle adjustment in high-temperatures to a cold 33.3°F (0.7°C) with the onset of February, maintaining near parity with January's 29.1°F (-1.6°C). Weather in February »

Weather in March

March, the first month of the spring in Cromwell, is a frosty month, with an average temperature fluctuating between 48.2°F (9°C) and 32.5°F (0.3°C). March's onset brings a noticeable temperature rise, soaring from an icy 33.3°F (0.7°C) in February to a chilly 48.2°F (9°C). Weather in March »

Weather in April

April in Cromwell, Iowa, is a moderate spring month, with an average temperature varying between 59.7°F (15.4°C) and 42.3°F (5.7°C). In Cromwell, the average high-temperature in April rises, from a frosty 48.2°F (9°C) in March, to a moderate 59.7°F (15.4°C). Weather in April »

Weather in May

May, the last month of the spring in Cromwell, is a pleasant month, with temperature in the range of an average high of 69.3°F (20.7°C) and an average low of 52.7°F (11.5°C). May's arrival brings a change in high-temperatures, moving from a mild 59.7°F (15.4°C) in April to an agreeable 69.3°F (20.7°C). Weather in May »

Weather in June

June, the first month of the summer in Cromwell, is a moderately hot month, with an average temperature varying between 79.5°F (26.4°C) and 63.1°F (17.3°C). In Cromwell, stepping into June brings a temperature increase, moving up from May's agreeable 69.3°F (20.7°C) to a warm 79.5°F (26.4°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Cromwell, Iowa, with an average temperature varying between 82.9°F (28.3°C) and 65.8°F (18.8°C). With average high and low temperatures of 82.9°F (28.3°C) and 65.8°F (18.8°C) respectively, July is Cromwell's warmest month. For most parts of July, the heat index is estimated at a tropical 91.4°F (33°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Cromwell, Iowa, with an average temperature varying between 63°F (17.2°C) and 81°F (27.2°C). As Cromwell steps into August, the average high-temperature holds at a still moderately hot 81°F (27.2°C), hinting at a minor fluctuation from the prior month. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Cromwell, Iowa, with an average temperature fluctuating between 75°F (23.9°C) and 56.1°F (13.4°C). September ushers in a minute temperature change, with average high-temperatures reducing from August's warm 81°F (27.2°C) to a still moderately hot 75°F (23.9°C). Weather in September »

Weather in October

October, like September, is another refreshing autumn month in Cromwell, Iowa, with an average temperature ranging between max 60.6°F (15.9°C) and min 44.1°F (6.7°C). Arrival of October comes with a reduction in the average high-temperature, falling from a moderately hot 75°F (23.9°C) in September to a refreshing 60.6°F (15.9°C). Weather in October »

Weather in November

November, the last month of the autumn in Cromwell, is another chilly month, with an average temperature varying between 32.5°F (0.3°C) and 47.3°F (8.5°C). With the onset of November, Cromwell experiences a modest temperature adjustment, with the average high-temperature receding 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

December, the first month of the winter in Cromwell, is also an icy month, with an average temperature fluctuating between 22.3°F (-5.4°C) and 34.3°F (1.3°C). A shift in the average high-temperature occurs in December, reducing from a frosty 47.3°F (8.5°C) in November to an icy 34.3°F (1.3°C). Weather in December »
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Frequently asked questions

What part of the year is the coldest in Cromwell?

Cromwell's January weather, marked by an average high temperature of 29.1°F (-1.6°C) and an average low temperature of 15.8°F (-9°C), is the coldest in the year.

What are the most humid months in Cromwell?

January and June, with an average relative humidity of 82%, are most humid months.

What is the driest month in Cromwell?

The month with the least rainfall is January, when the rain falls for 3.7 days and typically collects 0.75" (19mm) of precipitation.

How many days does it rain in Cromwell?

Throughout the year, in Cromwell, Iowa, there are 127.7 rainfall days, and 23.39" (594mm) of precipitation is accumulated.

When does it snow in Cromwell?

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

What is the snowiest month in Cromwell?

The month with the most snowfall in Cromwell is January, when snow falls for 8.7 days and typically aggregates up to 3.15" (80mm) of snow.

How many days does it snow in Cromwell?

Throughout the year, there are 32.6 snowfall days, and 12.01" (305mm) of snow is accumulated.

What is the month with the least sunshine in Cromwell?

January has the least sunshine of the year in Cromwell, with an average of 4.4h of sunshine.

What is the month with the lowest UV index in Cromwell?

January is the month with the lowest UV index in Cromwell, Iowa, with an average maximum UV index of 1.

When is Daylight Saving Time (DST) in Cromwell?

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 in Cromwell?

The month with the most rainfall in Cromwell, Iowa, is June, when the rain falls for 17 days and typically aggregates up to 4.17" (106mm) of precipitation.

When it does not snow in Cromwell?

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

When are the longest days in Cromwell?

With an average of 15h and 6min of daylight, June has the longest days of the year in Cromwell, Iowa.

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

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

What month is the hottest in Cromwell?

Cromwell notes the warmest temperatures in July, with a average high of 82.9°F (28.3°C) and a low of 65.8°F (18.8°C).

What month has the most sunshine in Cromwell?

With an average of 10.1h of sunshine, July has the most sunshine of the year.

What is the least humid month in Cromwell?

October is the least humid month in Cromwell, with an average relative humidity of 71%.

What is the month with the shortest days in Cromwell?

With an average of 9h and 18min of daylight, December has the shortest days of the year in Cromwell.

Average temperature
Cromwell, IA

Average temperature - Cromwell, 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 (29.1°F).

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).

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Average pressure
Cromwell, IA

Average pressure - Cromwell, IA

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed
Cromwell, IA

Average wind speed - Cromwell, IA

The windiest months (with the highest average wind speed) are January and February (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average humidity
Cromwell, IA

Average humidity - Cromwell, IA

The months with the highest relative humidity are January and June (82%).
The month with the lowest relative humidity is October (71%).

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Average rainfall
Cromwell, IA

Average rainfall - Cromwell, IA

The wettest month (with the highest rainfall) is June (4.17").
The driest month (with the least rainfall) is January (0.75").

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Average rainfall days
Cromwell, IA

Average rainfall days - Cromwell, IA

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (3.7 days).

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Average snowfall
Cromwell, IA

Average snowfall - Cromwell, IA

The month with the highest snowfall is January (3.15").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Cromwell, IA

Average snowfall days - Cromwell, IA

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Cromwell, IA

Average daylight / Average sunshine - Cromwell, 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 18min).

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days
Cromwell, IA

Average sunshine days - Cromwell, IA

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (10.7 days).

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Average visibility
Cromwell, IA

Average visibility - Cromwell, 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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Cromwell, Iowa, USA

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