Climate and monthly weather forecast
Hamilton, IA

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Weather in January

January, like December, is another subzero cold winter month in Hamilton, Iowa, with an average temperature varying between 16.2°F (-8.8°C) and 29.3°F (-1.5°C). In Hamilton, January records the lowest average temperatures, peaking at 29.3°F (-1.5°C) and reaching a low of 16.2°F (-8.8°C). Weather in January »

Weather in February

The last month of the winter, February, is a wintry month in Hamilton, Iowa, with temperature in the range of an average high of 33.4°F (0.8°C) and an average low of 19.2°F (-7.1°C). The transition into February shows a subtle variation to an icy 33.4°F (0.8°C) from January's 29.3°F (-1.5°C) in the average high-temperature. Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Hamilton, Iowa, with temperature in the range of an average low of 33.1°F (0.6°C) and an average high of 48.2°F (9°C). March's arrival signals a significant increase in average high-temperatures, soaring from February's cold 33.4°F (0.8°C) to a chilly 48.2°F (9°C). Weather in March »

Weather in April

April in Hamilton, Iowa, is a mild spring month, with an average temperature varying between 60.3°F (15.7°C) and 42.4°F (5.8°C). In Hamilton, stepping into April brings a temperature increase, moving up from March's chilly 48.2°F (9°C) to a moderate 60.3°F (15.7°C). Weather in April »

Weather in May

May, the last month of the spring in Hamilton, is an agreeable month, with an average temperature ranging between max 69.4°F (20.8°C) and min 52.7°F (11.5°C). Noticing a change, the average high-temperature during May moves from April's moderate 60.3°F (15.7°C) to an agreeable 69.4°F (20.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Hamilton, Iowa, with an average temperature fluctuating between 63.1°F (17.3°C) and 79.7°F (26.5°C). The shift from May to June sees an increase in the average high-temperature, transitioning from a pleasant 69.4°F (20.8°C) to a moderately hot 79.7°F (26.5°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Hamilton, Iowa, with an average temperature varying between 66°F (18.9°C) and 82.9°F (28.3°C). July, characterized by an average high temperature of 82.9°F (28.3°C) and a low temperature of 66°F (18.9°C), is generally the warmest month. The average heat index in July is computed to be a tropical 91.4°F (33°C). Weather in July »

Weather in August

August, the last month of the summer in Hamilton, is another warm month, with an average temperature ranging between min 63.1°F (17.3°C) and max 81.9°F (27.7°C). With August's arrival, Hamilton notes an average high-temperature of a still warm 81.9°F (27.7°C), closely following the trend of the preceding month. Weather in August »

Weather in September

September, the first month of the autumn in Hamilton, is still a warm month, with an average temperature fluctuating between 75.7°F (24.3°C) and 56.5°F (13.6°C). As August makes way for September, Hamilton's average high-temperature eases from 81.9°F (27.7°C) to a still warm 75.7°F (24.3°C). Weather in September »

Weather in October

October, the same as September, is another comfortable autumn month in Hamilton, Iowa, with temperature in the range of an average high of 61.5°F (16.4°C) and an average low of 44.6°F (7°C). The transition into October is accompanied by a temperature decrease, with the average high-temperature shifting from a warm 75.7°F (24.3°C) in September to an enjoyable 61.5°F (16.4°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Hamilton, Iowa, with an average temperature varying between 33.6°F (0.9°C) and 48.2°F (9°C). November comes with a drop in the average high-temperature, falling from October's comfortable 61.5°F (16.4°C) to a chilly 48.2°F (9°C). Weather in November »

Weather in December

December, the first month of the winter in Hamilton, is still a cold month, with an average temperature ranging between min 23.7°F (-4.6°C) and max 35.1°F (1.7°C). In Hamilton, the average high-temperature in December decreases from a chilly 48.2°F (9°C) in November to a wintry 35.1°F (1.7°C). Weather in December »
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest in Hamilton?

January, characterized by an average high temperature of 29.3°F (-1.5°C) and a low temperature of 16.2°F (-8.8°C), is generally the coldest month.

How much does it rain in Hamilton?

In Hamilton, Iowa, during the entire year, the rain falls for 119 days and collects up to 19.02" (483mm) of precipitation.

When does it snow in Hamilton?

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

What is the snowiest month in Hamilton?

January is the month with the most snowfall in Hamilton, Iowa. Snow falls for 8.2 days and accumulates 2.87" (73mm) of snow.

How much does it snow in Hamilton?

Throughout the year, in Hamilton, there are 28.3 snowfall days, and 10.28" (261mm) of snow is accumulated.

What is the month with the least sunshine in Hamilton?

January has the least sunshine of the year in Hamilton, with an average of 4.1h of sunshine.

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

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

When is Daylight Saving Time (DST) in Hamilton?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Hamilton, 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 most humid month in Hamilton?

With an average relative humidity of 83%, June is the most humid month.

What is the wettest month in Hamilton?

The month with the most rainfall in Hamilton is June, when the rain falls for 15.1 days and typically aggregates up to 2.99" (76mm) of precipitation.

When it does not snow in Hamilton?

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

When are the longest days in Hamilton?

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

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

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

What part of the year is the hottest in Hamilton?

The month of July sees the average highest temperatures, reaching 82.9°F (28.3°C) at the peak and 66°F (18.9°C) at the low.

What month has the most sunshine in Hamilton?

With an average of 10.3h of sunshine, July has the most sunshine of the year in Hamilton.

What is the least humid month in Hamilton?

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

What is the driest month in Hamilton?

The month with the least rainfall in Hamilton is December, when the rain falls for 5.3 days and typically collects 0.63" (16mm) of precipitation.

What is the month with the shortest days in Hamilton?

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

Average temperature
Hamilton, IA

Average temperature - Hamilton, 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 (29.3°F).

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

Average pressure
Hamilton, IA

Average pressure - Hamilton, IA

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed
Hamilton, IA

Average wind speed - Hamilton, IA

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

Average humidity
Hamilton, IA

Average humidity - Hamilton, IA

The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (72%).

Average rainfall
Hamilton, IA

Average rainfall - Hamilton, IA

The wettest month (with the highest rainfall) is June (2.99").
The driest month (with the least rainfall) is December (0.63").

Average rainfall days
Hamilton, IA

Average rainfall days - Hamilton, IA

The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is January (4 days).

Average snowfall
Hamilton, IA

Average snowfall - Hamilton, IA

The month with the highest snowfall is January (2.87").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Hamilton, IA

Average snowfall days - Hamilton, IA

The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Hamilton, IA

Average daylight / Average sunshine - Hamilton, 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 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days
Hamilton, IA

Average sunshine days - Hamilton, IA

The month with the most sunshine days is November (21.9 days).
The month with the least sunshine days is June (11.1 days).

Average UV index
Hamilton, IA

Average UV index - Hamilton, 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).

Average visibility
Hamilton, IA

Average visibility - Hamilton, 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).

Hamilton, Iowa, USA

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