Climate and monthly weather forecast
Merrill, IA

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Weather in January

January, like December, is a freezing cold winter month in Merrill, Iowa, with an average temperature fluctuating between 25.2°F (-3.8°C) and 12.2°F (-11°C). The month of January sees the lowest average temperatures, reaching 25.2°F (-3.8°C) at the peak and 12.2°F (-11°C) at the low. Weather in January »

Weather in February

February, the last month of the winter in Merrill, is also a subzero cold month, with temperature in the range of an average low of 15.6°F (-9.1°C) and an average high of 29.5°F (-1.4°C). During February, the average high-temperature is a still freezing cold 29.5°F (-1.4°C), maintaining a close resemblance to that of the preceding month. Weather in February »

Weather in March

March, the first month of the spring in Merrill, is a frosty month, with an average temperature ranging between max 45.1°F (7.3°C) and min 29.8°F (-1.2°C). The arrival of March signals a clear increase in the average high-temperature, soaring from a freezing cold 29.5°F (-1.4°C) in February to a frosty 45.1°F (7.3°C). Weather in March »

Weather in April

April is a moderate spring month in Merrill, Iowa, with an average temperature varying between 40.6°F (4.8°C) and 57.4°F (14.1°C). Merrill sees an increase in average high-temperatures during April, moving from a chilly 45.1°F (7.3°C) in March to a mild 57.4°F (14.1°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in Merrill, Iowa, with an average temperature fluctuating between 52.3°F (11.3°C) and 69.3°F (20.7°C). The shift into May is characterized by a rise in the average high-temperature, transitioning from April's mild 57.4°F (14.1°C) to an agreeable 69.3°F (20.7°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Merrill, Iowa, with an average temperature ranging between max 78.4°F (25.8°C) and min 62.2°F (16.8°C). As May gives way to June, the average high-temperature displays an increase, moving from an agreeable 69.3°F (20.7°C) to a warm 78.4°F (25.8°C). Weather in June »

Weather in July

July, like June, in Merrill, Iowa, is another warm summer month, with an average temperature fluctuating between 64.2°F (17.9°C) and 82.9°F (28.3°C). July is the warmest month, with an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 64.2°F (17.9°C). In July, the average heat index is computed to be a hot 89.6°F (32°C). Weather in July »

Weather in August

August, the last month of the summer in Merrill, is also a moderately hot month, with an average temperature varying between 60.8°F (16°C) and 80.8°F (27.1°C). Entering August, Merrill's average high-temperature reads a still warm 80.8°F (27.1°C), indicating a close resemblance to the previous month's climate. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Merrill, Iowa, with an average temperature ranging between min 54.9°F (12.7°C) and max 75°F (23.9°C). Merrill's progression into September involves a minor drop in the average high-temperature, slightly receding from 80.8°F (27.1°C) in August to a still moderately hot 75°F (23.9°C). Weather in September »

Weather in October

October, like September, is another mild autumn month in Merrill, Iowa, with an average temperature ranging between min 42.8°F (6°C) and max 58.8°F (14.9°C). Merrill's October weather is characterized by a distinct downswing in high-temperatures, falling from September's warm 75°F (23.9°C) to a refreshing 58.8°F (14.9°C). Weather in October »

Weather in November

November, the last month of the autumn in Merrill, is also a frosty month, with temperature in the range of an average low of 31.3°F (-0.4°C) and an average high of 45.1°F (7.3°C). As November commences, the average high-temperature shows a reduction, transitioning from a moderate 58.8°F (14.9°C) in October to a frosty 45.1°F (7.3°C). Weather in November »

Weather in December

The first month of the winter, December, is also a subzero cold month in Merrill, Iowa, with an average temperature ranging between min 17.8°F (-7.9°C) and max 29.3°F (-1.5°C). Merrill, Iowa, witnesses a significant decrease in the average high-temperature with the arrival of December, falling from November's chilly 45.1°F (7.3°C) to a freezing cold 29.3°F (-1.5°C). Weather in December »
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Frequently asked questions

What time of the year is the coldest in Merrill?

Merrill experiences its average lowest temperatures in January, reaching a peak of 25.2°F (-3.8°C) and a minimum of 12.2°F (-11°C).

What is the most humid month in Merrill?

The most humid month is January, with an average relative humidity of 85%.

What is the driest month in Merrill?

January is the month with the least rainfall. Rain falls for 3.3 days and accumulates 0.35" (9mm) of precipitation.

How many days does it rain in Merrill?

Throughout the year, there are 112 rainfall days, and 15.71" (399mm) of precipitation is accumulated.

When does it snow in Merrill?

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

How much does it snow in Merrill?

Throughout the year, in Merrill, there are 34.7 snowfall days, and 7.52" (191mm) of snow is accumulated.

What is the month with the least sunshine in Merrill?

The month with the least sunshine is January, with an average of 4.2h of sunshine.

When is the lowest UV index in Merrill?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Merrill, Iowa.

What is the snowiest month in Merrill?

The month with the most snowfall in Merrill is February, when snow falls for 8.3 days and typically aggregates up to 1.85" (47mm) of snow.

When is Daylight Saving Time (DST) in Merrill?

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

When it does not snow in Merrill?

May through September are months without snowfall.

What is the wettest month in Merrill?

The month with the most rainfall in Merrill, Iowa, is June, when the rain falls for 16.5 days and typically aggregates up to 2.48" (63mm) of precipitation.

When are the longest days in Merrill?

The month with the longest days in Merrill, Iowa, is June, with an average of 15h and 18min of daylight.

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

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

What is the hottest time of year in Merrill?

Merrill's warmest weather arrives in July, when temperatures average a high of 82.9°F (28.3°C) and a low of 64.2°F (17.9°C).

What month has the most sunshine in Merrill?

With an average of 10.7h of sunshine, July has the most sunshine of the year in Merrill.

What is the least humid month in Merrill?

The least humid month is October, with an average relative humidity of 66%.

What is the month with the shortest days in Merrill?

December has the shortest days of the year in Merrill, Iowa, with an average of 9h and 6min of daylight.

Average temperature
Merrill, IA

Average temperature - Merrill, 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 (25.2°F).

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).

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Average pressure
Merrill, IA

Average pressure - Merrill, 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
Merrill, IA

Average wind speed - Merrill, IA

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).

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Average rainfall
Merrill, IA

Average rainfall - Merrill, IA

The wettest month (with the highest rainfall) is June (2.48").
The driest month (with the least rainfall) is January (0.35").

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Average rainfall days
Merrill, IA

Average rainfall days - Merrill, IA

The month with the highest number of rainy days is June (16.5 days).
The months with the least rainy days are February and December (2.6 days).

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Average snowfall
Merrill, IA

Average snowfall - Merrill, IA

The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Merrill, IA

Average snowfall days - Merrill, IA

The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Merrill, IA

Average daylight / Average sunshine - Merrill, IA

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).

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

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Average sunshine days
Merrill, IA

Average sunshine days - Merrill, IA

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (11.9 days).

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Average UV index
Merrill, IA

Average UV index - Merrill, 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, November and December (UV index 2).

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Average visibility
Merrill, IA

Average visibility - Merrill, 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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Merrill, Iowa, USA

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