Climate and monthly weather forecast
Dayton, IA

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Weather in January

January, like December, is another subzero cold winter month in Dayton, Iowa, with temperature in the range of an average low of 13.5°F (-10.3°C) and an average high of 26.8°F (-2.9°C). The coldest period tends to be January, when average temperatures fluctuate between a high of 26.8°F (-2.9°C) and a low of 13.5°F (-10.3°C). Weather in January »

Weather in February

February, the last month of the winter in Dayton, is another freezing cold month, with an average temperature fluctuating between 16.9°F (-8.4°C) and 30.6°F (-0.8°C). With February's arrival, Dayton notes an average high-temperature of a still subzero cold 30.6°F (-0.8°C), closely following the trend of the preceding month. Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Dayton, Iowa, with an average temperature varying between 30.9°F (-0.6°C) and 45.7°F (7.6°C). March is marked by a significant increase, with the average high-temperature advancing from a freezing cold 30.6°F (-0.8°C) in February to a chilly 45.7°F (7.6°C). Weather in March »

Weather in April

April in Dayton, Iowa, is a refreshing spring month, with an average temperature fluctuating between 41.9°F (5.5°C) and 58.6°F (14.8°C). April brings a temperature change, with average high-temperatures moving from March's frosty 45.7°F (7.6°C) to a mild 58.6°F (14.8°C). Weather in April »

Weather in May

May, the last month of the spring in Dayton, is a pleasant month, with an average temperature varying between 69.4°F (20.8°C) and 52.9°F (11.6°C). May brings a rise in Dayton's average high-temperature, moving from a mild 58.6°F (14.8°C) in April to an agreeable 69.4°F (20.8°C). Weather in May »

Weather in June

June, the first month of the summer in Dayton, is a warm month, with an average temperature ranging between min 62.2°F (16.8°C) and max 79.2°F (26.2°C). June's arrival brings a change in high-temperatures, moving from an agreeable 69.4°F (20.8°C) in May to a warm 79.2°F (26.2°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Dayton, Iowa, with an average temperature varying between 64.4°F (18°C) and 81.5°F (27.5°C). July, marked by an average high-temperature of 81.5°F (27.5°C) and a low-temperature of 64.4°F (18°C), is the warmest month. The heat index for July is appraised at a hot 87.8°F (31°C). Weather in July »

Weather in August

August, the last month of the summer in Dayton, is another warm month, with an average temperature varying between 61.3°F (16.3°C) and 80.2°F (26.8°C). The average high-temperature during August registers at a still moderately hot 80.2°F (26.8°C), maintaining a close resemblance to the previous month. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Dayton, Iowa, with an average temperature fluctuating between 55.9°F (13.3°C) and 74.8°F (23.8°C). The beginning of September brings a slight decrease in the average high-temperature, transitioning from 80.2°F (26.8°C) in August to a still warm 74.8°F (23.8°C). Weather in September »

Weather in October

October, like September, is another refreshing autumn month in Dayton, Iowa, with temperature in the range of an average low of 44.1°F (6.7°C) and an average high of 59.9°F (15.5°C). October's arrival witnesses a distinct temperature drop, receding from September's warm 74.8°F (23.8°C) to a refreshing 59.9°F (15.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Dayton, Iowa, with an average temperature varying between 32.4°F (0.2°C) and 45.5°F (7.5°C). A distinct shift in the average high-temperature is signaled in November, moving down from a moderate 59.9°F (15.5°C) in October to a chilly 45.5°F (7.5°C). Weather in November »

Weather in December

December, the first month of the winter in Dayton, is also an icy month, with an average temperature fluctuating between 21°F (-6.1°C) and 32°F (0°C). As November transitions to December, the average high-temperature falls from a chilly 45.5°F (7.5°C) to an icy 32°F (0°C). Weather in December »
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Frequently asked questions

What is the coldest month in Dayton?

With average high temperatures of 26.8°F (-2.9°C) and lows of 13.5°F (-10.3°C), January is the coldest month.

What is the most humid month in Dayton?

With an average relative humidity of 84%, January is the most humid month.

What is the driest month in Dayton?

January is the month with the least rainfall. Rain falls for 3.8 days and accumulates 0.91" (23mm) of precipitation.

How many days does it rain in Dayton?

In Dayton, Iowa, during the entire year, the rain falls for 126.1 days and collects up to 26.85" (682mm) of precipitation.

When does it snow in Dayton?

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

When does it snow the most in Dayton?

The month with the most snowfall in Dayton is January, when snow falls for 10.3 days and typically aggregates up to 4.29" (109mm) of snow.

How much does it snow in Dayton?

Throughout the year, there are 37.8 snowfall days, and 15.39" (391mm) of snow is accumulated.

What is the month with the least sunshine in Dayton?

The month with the least sunshine is January, with an average of 4h of sunshine.

When is the lowest UV index in Dayton?

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

When is Daylight Saving Time (DST) in Dayton?

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

The month with the most rainfall in Dayton, Iowa, is May, when the rain falls for 16.1 days and typically aggregates up to 4.06" (103mm) of precipitation.

When it does not snow in Dayton?

June through September are months without snowfall.

When are the longest days in Dayton?

The month with the longest days in Dayton is June, with an average of 15h and 12min of daylight.

When is the highest UV index in Dayton?

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

What time of the year is the hottest in Dayton?

July, known for its average high temperature of 81.5°F (27.5°C) and an average low temperature of 64.4°F (18°C), is the warmest month in Dayton, Iowa.

What month has the most sunshine in Dayton?

The month with the most sunshine in Dayton is July, with an average of 10h of sunshine.

What is the least humid month in Dayton?

With an average relative humidity of 69%, October is the least humid month in Dayton, Iowa.

What is the month with the shortest days in Dayton?

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

Average temperature
Dayton, IA

Average temperature - Dayton, IA

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (26.8°F).

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).

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Average pressure
Dayton, IA

Average pressure - Dayton, 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
Dayton, IA

Average wind speed - Dayton, IA

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).

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Average rainfall
Dayton, IA

Average rainfall - Dayton, IA

The wettest month (with the highest rainfall) is May (4.06").
The driest month (with the least rainfall) is January (0.91").

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Average rainfall days
Dayton, IA

Average rainfall days - Dayton, IA

The month with the highest number of rainy days is June (16.7 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall
Dayton, IA

Average snowfall - Dayton, IA

The month with the highest snowfall is January (4.29").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Dayton, IA

Average snowfall days - Dayton, IA

The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Dayton, IA

Average daylight / Average sunshine - Dayton, IA

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

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

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Average sunshine days
Dayton, IA

Average sunshine days - Dayton, IA

The month with the most sunshine days is October (19 days).
The month with the least sunshine days is June (11.8 days).

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Average UV index
Dayton, IA

Average UV index - Dayton, 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
Dayton, IA

Average visibility - Dayton, 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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Dayton, Iowa, USA

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