Climate and monthly weather forecast
Hartwick, IA

Weather in January

January, the same as December, in Hartwick, Iowa, is another subzero cold winter month, with an average temperature fluctuating between 27°F (-2.8°C) and 13.6°F (-10.2°C). With an average high-temperature of 27°F (-2.8°C) and an average low-temperature of 13.6°F (-10.2°C), January is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Hartwick, Iowa, with an average temperature varying between 30.7°F (-0.7°C) and 17.2°F (-8.2°C). In Hartwick, the average high-temperature in February is essentially the same as in January - a still freezing cold 30.7°F (-0.7°C). Weather in February »

Weather in March

March, the first month of the spring in Hartwick, is a chilly month, with an average temperature varying between 45.7°F (7.6°C) and 31.5°F (-0.3°C). In Hartwick, the average high-temperature in March significantly increases from a subzero cold 30.7°F (-0.7°C) in February to a chilly 45.7°F (7.6°C). Weather in March »

Weather in April

April in Hartwick, Iowa, is a moderate spring month, with an average temperature fluctuating between 58.3°F (14.6°C) and 41.5°F (5.3°C). In April, the average high-temperature increases from a chilly 45.7°F (7.6°C) in March to a moderate 58.3°F (14.6°C). Weather in April »

Weather in May

May, the last month of the spring in Hartwick, is a pleasant month, with an average temperature varying between 69.1°F (20.6°C) and 52.2°F (11.2°C). In Hartwick, the average high-temperature in May increases from a moderate 58.3°F (14.6°C) in April to an agreeable 69.1°F (20.6°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Hartwick, Iowa, with an average temperature ranging between min 62.2°F (16.8°C) and max 78.4°F (25.8°C). In June, the average high-temperature increases from a pleasant 69.1°F (20.6°C) in May to a moderately hot 78.4°F (25.8°C). Weather in June »

Weather in July

July, like June, in Hartwick, Iowa, is another warm summer month, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 64.8°F (18.2°C). July is the warmest month, with an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 64.8°F (18.2°C). In July, the average heat index is calculated to be a tropical 87.8°F (31°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Hartwick, Iowa, with an average temperature fluctuating between 61.9°F (16.6°C) and 79.7°F (26.5°C). In August, the average high-temperature is relatively the same as in July - a still moderately hot 79.7°F (26.5°C). Weather in August »

Weather in September

September, the first month of the autumn in Hartwick, is also a moderately hot month, with temperature in the range of an average low of 55.4°F (13°C) and an average high of 74.7°F (23.7°C). In September, the average high-temperature is essentially the same as in August - a still warm 74.7°F (23.7°C). Weather in September »

Weather in October

October, the same as September, in Hartwick, Iowa, is a moderate autumn month, with an average temperature varying between 60.1°F (15.6°C) and 44.4°F (6.9°C). In Hartwick, the average high-temperature in October declines considerably from a moderately hot 74.7°F (23.7°C) in September to a mild 60.1°F (15.6°C). Weather in October »

Weather in November

November, the last month of the autumn in Hartwick, is also a frosty month, with an average temperature fluctuating between 46.2°F (7.9°C) and 32.2°F (0.1°C). In Hartwick, the average high-temperature in November drops from a moderate 60.1°F (15.6°C) in October to a frosty 46.2°F (7.9°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Hartwick, Iowa, with an average temperature varying between 22.1°F (-5.5°C) and 32.9°F (0.5°C). In December, the average high-temperature decreases from a chilly 46.2°F (7.9°C) in November to a cold 32.9°F (0.5°C). Weather in December »
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FAQ

What is the coldest month in Hartwick?

January is the coldest month in Hartwick, with an average high-temperature of 27°F (-2.8°C) and an average low-temperature of 13.6°F (-10.2°C).

What are the most humid months in Hartwick?

The months with the highest humidity are January, February and July, with an average relative humidity of 84%.

What is the driest month in Hartwick?

January is the month with the least rainfall in Hartwick. Rain falls for 5 days and accumulates 1.02" (26mm) of precipitation.

How many days does it rain in Hartwick?

In Hartwick, Iowa, during the entire year, the rain falls for 135.6 days and collects up to 27.48" (698mm) of precipitation.

When does it snow in Hartwick?

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

When does it snow the most in Hartwick?

The month with the most snowfall is January, when snow falls for 9.8 days and typically aggregates up to 4.49" (114mm) of snow.

How many days does it snow in Hartwick?

In Hartwick, Iowa, during the entire year, snow falls for 35.5 days and aggregates up to 13.98" (355mm) of snow.

What is the month with the least sunshine in Hartwick?

January has the least sunshine of the year, with an average of 4h of sunshine.

When is the lowest UV index in Hartwick?

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

When is Daylight Saving Time (DST) in Hartwick?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, 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 rainiest month in Hartwick?

The month with the most rainfall in Hartwick is May, when the rain falls for 17.3 days and typically aggregates up to 4.21" (107mm) of precipitation.

When it does not snow in Hartwick?

June through September are months without snowfall.

When are the longest days in Hartwick?

The month with the longest days is June, with an average of 15h and 10min of daylight.

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

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

What is the warmest month in Hartwick?

July is the warmest month, with an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 64.8°F (18.2°C).

What month has the most sunshine in Hartwick?

July has the most sunshine of the year in Hartwick, with an average of 10.1h of sunshine.

What is the least humid month in Hartwick?

October is the least humid month, with an average relative humidity of 72%.

What is the month with the shortest days in Hartwick?

The month with the shortest days in Hartwick is December, with an average of 9h and 12min of daylight.

Average temperature
Hartwick, IA

Average temperature - Hartwick, IA

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27°F).

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).

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Average pressure
Hartwick, IA

Average pressure - Hartwick, 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
Hartwick, IA

Average wind speed - Hartwick, IA

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

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Average humidity
Hartwick, IA

Average humidity - Hartwick, IA

The months with the highest relative humidity are January, February and July (84%).
The month with the lowest relative humidity is October (72%).

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Average rainfall
Hartwick, IA

Average rainfall - Hartwick, IA

The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is January (1.02").

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Average rainfall days
Hartwick, IA

Average rainfall days - Hartwick, IA

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (4.6 days).

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Average snowfall
Hartwick, IA

Average snowfall - Hartwick, IA

The month with the highest snowfall is January (4.49").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Hartwick, IA

Average snowfall days - Hartwick, 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
Hartwick, IA

Average daylight / Average sunshine - Hartwick, IA

The month with the longest days is June (Average daylight: 15h and 10min).
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 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days
Hartwick, IA

Average sunshine days - Hartwick, IA

The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is June (10.8 days).

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Average visibility
Hartwick, IA

Average visibility - Hartwick, IA

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

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