Climate and monthly weather forecast
Thornburg, IA

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Weather in January

January, the same as December, in Thornburg, Iowa, is another subzero cold winter month, with an average temperature varying between 15.6°F (-9.1°C) and 28.6°F (-1.9°C). With average high temperatures of 28.6°F (-1.9°C) and lows of 15.6°F (-9.1°C), January is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is an icy month in Thornburg, Iowa, with an average temperature fluctuating between 19°F (-7.2°C) and 32.5°F (0.3°C). February's arrival brings an average high-temperature of a cold 32.5°F (0.3°C), demonstrating subtle variation from the preceding month. Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Thornburg, Iowa, with an average temperature fluctuating between 32.4°F (0.2°C) and 47.1°F (8.4°C). The beginning of March marks a clear shift in the average high-temperature, advancing from February's icy 32.5°F (0.3°C) to a frosty 47.1°F (8.4°C). Weather in March »

Weather in April

April is a mild spring month in Thornburg, Iowa, with temperature in the range of an average high of 59.5°F (15.3°C) and an average low of 42.4°F (5.8°C). April brings an increase in the average high-temperature, progressing from a frosty 47.1°F (8.4°C) in March to a moderate 59.5°F (15.3°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in Thornburg, Iowa, with an average temperature ranging between min 53.2°F (11.8°C) and max 70°F (21.1°C). With the onset of May, Thornburg's weather sees a temperature rise, transitioning from a mild 59.5°F (15.3°C) in April to a pleasant 70°F (21.1°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Thornburg, Iowa, with temperature in the range of an average low of 63.1°F (17.3°C) and an average high of 79.3°F (26.3°C). The arrival of June brings a change in Thornburg's weather, with average high-temperatures moving from May's agreeable 70°F (21.1°C) to a moderately hot 79.3°F (26.3°C). Weather in June »

Weather in July

July, like June, in Thornburg, Iowa, is another warm summer month, with an average temperature fluctuating between 65.1°F (18.4°C) and 82°F (27.8°C). Thornburg's July weather, marked by an average high temperature of 82°F (27.8°C) and an average low temperature of 65.1°F (18.4°C), is the warmest in the year. July's average heat index is appraised at a tropical 89.6°F (32°C). Weather in July »

Weather in August

August, the last month of the summer in Thornburg, is also a moderately hot month, with an average temperature ranging between max 81.1°F (27.3°C) and min 62.8°F (17.1°C). Thornburg, Iowa, marks the arrival of August with an average high-temperature of a still warm 81.1°F (27.3°C), hardly different from July's 82°F (27.8°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Thornburg, Iowa, with an average temperature ranging between max 75.2°F (24°C) and min 56.3°F (13.5°C). A subtle shift in Thornburg's weather is observed as August turns into September, with the average high temperature reducing from 81.1°F (27.3°C) to a still moderately hot 75.2°F (24°C). Weather in September »

Weather in October

October, like September, in Thornburg, Iowa, is another refreshing autumn month, with an average temperature varying between 61.3°F (16.3°C) and 44.8°F (7.1°C). With the onset of October, Thornburg experiences a modest temperature adjustment, with the average high-temperature receding from a warm 75.2°F (24°C) in September to a comfortable 61.3°F (16.3°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Thornburg, Iowa, with an average temperature ranging between max 46.9°F (8.3°C) and min 33.4°F (0.8°C). Thornburg's transition into November is marked by a clear temperature shift, receding from an enjoyable 61.3°F (16.3°C) in October to a frosty 46.9°F (8.3°C). Weather in November »

Weather in December

December, the first month of the winter in Thornburg, is still a cold month, with temperature in the range of an average low of 23.4°F (-4.8°C) and an average high of 34.7°F (1.5°C). December's onset brings a slight change in high-temperatures, falling from a frosty 46.9°F (8.3°C) in November to a wintry 34.7°F (1.5°C). Weather in December »
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Frequently asked questions

What part of the year is the coldest in Thornburg?

In Thornburg, January records the average lowest temperatures, peaking at 28.6°F (-1.9°C) and reaching a low of 15.6°F (-9.1°C).

How much does it rain in Thornburg?

In Thornburg, Iowa, during the entire year, the rain falls for 137.9 days and collects up to 27.76" (705mm) of precipitation.

When does it snow in Thornburg?

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

When does it snow the most in Thornburg?

January is the month with the most snowfall in Thornburg. Snow falls for 9.5 days and accumulates 4.06" (103mm) of snow.

How much does it snow in Thornburg?

In Thornburg, during the entire year, snow falls for 32.8 days and aggregates up to 12.56" (319mm) of snow.

What is the month with the least sunshine in Thornburg?

January has the least sunshine of the year in Thornburg, Iowa, with an average of 4.2h of sunshine.

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

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

What is the driest month in Thornburg?

The month with the least rainfall is February, when the rain falls for 4.9 days and typically collects 0.98" (25mm) of precipitation.

When is Daylight Saving Time (DST) in Thornburg?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Thornburg, 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 rainiest month in Thornburg?

The month with the most rainfall is May, when the rain falls for 17.7 days and typically aggregates up to 4.17" (106mm) of precipitation.

When it does not snow in Thornburg?

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

When are the longest days in Thornburg?

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

When is the highest UV index in Thornburg?

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

What month is the hottest in Thornburg?

The warmest time of the year is July, with temperatures averaging a high of 82°F (27.8°C) and a low of 65.1°F (18.4°C).

What is the most humid month in Thornburg?

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

What month has the most sunshine in Thornburg?

The month with the most sunshine in Thornburg is July, with an average of 10.3h of sunshine.

What is the least humid month in Thornburg?

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

What is the month with the shortest days in Thornburg?

December has the shortest days of the year, with an average of 9h and 12min of daylight.

Average temperature
Thornburg, IA

Average temperature - Thornburg, IA

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (28.6°F).

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).

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Average pressure
Thornburg, IA

Average pressure - Thornburg, 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
Thornburg, IA

Average wind speed - Thornburg, IA

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).

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Average rainfall
Thornburg, IA

Average rainfall - Thornburg, IA

The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (0.98").

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Average rainfall days
Thornburg, IA

Average rainfall days - Thornburg, IA

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (4.9 days).

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Average snowfall
Thornburg, IA

Average snowfall - Thornburg, IA

The month with the highest snowfall is January (4.06").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Thornburg, IA

Average snowfall days - Thornburg, IA

The month with the highest number of snowfall days is January (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Thornburg, IA

Average daylight / Average sunshine - Thornburg, 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 12min).

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 12min).

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Average sunshine days
Thornburg, IA

Average sunshine days - Thornburg, IA

The month with the most sunshine days is December (19.1 days).
The month with the least sunshine days is June (10.3 days).

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Average UV index
Thornburg, IA

Average UV index - Thornburg, 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
Thornburg, IA

Average visibility - Thornburg, IA

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

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Thornburg, Iowa, USA

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