Climate and monthly weather forecast
Griffen, IA

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Weather in January

January, the same as December, in Griffen, Iowa, is another subzero cold winter month, with an average temperature fluctuating between 13.1°F (-10.5°C) and 26.4°F (-3.1°C). Griffen's coldest temperatures are experienced in January, with average high temperatures of 26.4°F (-3.1°C) and lows of 13.1°F (-10.5°C). Weather in January »

Weather in February

February, the last month of the winter in Griffen, is also a subzero cold month, with an average temperature ranging between max 30.6°F (-0.8°C) and min 17.1°F (-8.3°C). Griffen, Iowa, marks the onset of February with an average high-temperature of a still subzero cold 30.6°F (-0.8°C), a subtle shift from January's 26.4°F (-3.1°C). Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Griffen, Iowa, with an average temperature varying between 30.7°F (-0.7°C) and 45.9°F (7.7°C). The rise of average high-temperatures is noticeable in March, with an increase from a subzero cold 30.6°F (-0.8°C) in February to a chilly 45.9°F (7.7°C). Weather in March »

Weather in April

April is a moderate spring month in Griffen, Iowa, with an average temperature fluctuating between 58.6°F (14.8°C) and 41.9°F (5.5°C). April brings a temperature increase, with average high-temperatures moving from March's chilly 45.9°F (7.7°C) to a mild 58.6°F (14.8°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in Griffen, Iowa, with an average temperature fluctuating between 53.1°F (11.7°C) and 69.4°F (20.8°C). May's arrival sees a rise in the average high-temperature, jumping from April's moderate 58.6°F (14.8°C) to a pleasant 69.4°F (20.8°C). Weather in May »

Weather in June

June, the first month of the summer in Griffen, is a warm month, with an average temperature fluctuating between 79°F (26.1°C) and 62.2°F (16.8°C). The onset of June brings a rise in the average high-temperature, elevating from an agreeable 69.4°F (20.8°C) in May to a moderately hot 79°F (26.1°C). Weather in June »

Weather in July

July, like June, in Griffen, Iowa, is a moderately hot summer month, with an average temperature varying between 64.4°F (18°C) and 81.3°F (27.4°C). July stands out as Griffen's warmest month, with an average high-temperature of 81.3°F (27.4°C) and a low-temperature of 64.4°F (18°C). For most parts of July, the heat index is estimated at a hot 87.8°F (31°C). Weather in July »

Weather in August

August, the last month of the summer in Griffen, is also a moderately hot month, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 79.9°F (26.6°C). Griffen experiences a minor change to a still warm 79.9°F (26.6°C) in average high-temperature during August, closely reflecting July. Weather in August »

Weather in September

September, the first month of the autumn in Griffen, is still a warm month, with an average temperature varying between 74.8°F (23.8°C) and 55.8°F (13.2°C). In September, Griffen experiences a minor shift in meteorological conditions with average high-temperatures marked at a still moderately hot 74.8°F (23.8°C), closely mirroring the climate in August. Weather in September »

Weather in October

October, the same as September, in Griffen, Iowa, is another mild autumn month, with an average temperature fluctuating between 44.1°F (6.7°C) and 59.9°F (15.5°C). Griffen's October weather is characterized by a distinct downswing in high-temperatures, falling from September's warm 74.8°F (23.8°C) to a moderate 59.9°F (15.5°C). Weather in October »

Weather in November

November, the last month of the autumn in Griffen, is another chilly month, with an average temperature varying between 45.5°F (7.5°C) and 32.2°F (0.1°C). The beginning of November signals a clear reduction in the average high-temperature, falling from a mild 59.9°F (15.5°C) in October to a chilly 45.5°F (7.5°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Griffen, Iowa, with an average temperature ranging between max 32.2°F (0.1°C) and min 21°F (-6.1°C). Griffen in December undergoes a mild reduction in the average high-temperature, shifting from November's chilly 45.5°F (7.5°C) to an icy 32.2°F (0.1°C). Weather in December »
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Frequently asked questions

What is the coldest time of year in Griffen?

January, recording an average high temperature of 26.4°F (-3.1°C) and a low temperature of 13.1°F (-10.5°C), is Griffen's coldest month.

What is the most humid month in Griffen?

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

What is the driest month in Griffen?

January is the month with the least rainfall. Rain falls for 3.9 days and accumulates 0.67" (17mm) of precipitation.

How much does it rain in Griffen?

Throughout the year, there are 123.3 rainfall days, and 20.98" (533mm) of precipitation is accumulated.

When does it snow in Griffen?

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

How much does it snow in Griffen?

Throughout the year, in Griffen, there are 39.9 snowfall days, and 10.91" (277mm) of snow is accumulated.

What is the month with the least sunshine in Griffen?

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

When is the lowest UV index in Griffen?

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

What is the snowiest month in Griffen?

February is the month with the most snowfall in Griffen. Snow falls for 9.2 days and accumulates 3.07" (78mm) of snow.

When is Daylight Saving Time (DST) in Griffen?

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

The month with the most rainfall in Griffen, Iowa, is June, when the rain falls for 17.4 days and typically aggregates up to 3.35" (85mm) of precipitation.

When it does not snow in Griffen?

June through September are months without snowfall in Griffen, Iowa.

When are the longest days in Griffen?

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

What is the month with the highest UV index in Griffen?

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

What are the warmest months in Griffen?

The warmest period is July, when temperatures fluctuate between an average high of 81.3°F (27.4°C) and a low of 64.4°F (18°C).

What month has the most sunshine in Griffen?

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

What is the least humid month in Griffen?

The least humid month in Griffen is October, with an average relative humidity of 69%.

What is the month with the shortest days in Griffen?

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

Average temperature
Griffen, IA

Average temperature - Griffen, IA

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (26.4°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 (13.1°F).

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Average pressure
Griffen, IA

Average pressure - Griffen, 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
Griffen, IA

Average wind speed - Griffen, IA

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average rainfall
Griffen, IA

Average rainfall - Griffen, IA

The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (0.67").

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Average rainfall days
Griffen, IA

Average rainfall days - Griffen, IA

The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (3.2 days).

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Average snowfall
Griffen, IA

Average snowfall - Griffen, IA

The month with the highest snowfall is February (3.07").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Griffen, IA

Average snowfall days - Griffen, IA

The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Griffen, IA

Average daylight / Average sunshine - Griffen, 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 and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days
Griffen, IA

Average sunshine days - Griffen, IA

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is June (10.5 days).

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Average UV index
Griffen, IA

Average UV index - Griffen, 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
Griffen, IA

Average visibility - Griffen, 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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Griffen, Iowa, USA

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