Climate and monthly weather forecast
Allendale, IL

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Weather in January

January, like December, in Allendale, Illinois, is another cold winter month, with an average temperature ranging between min 24.8°F (-4°C) and max 37.9°F (3.3°C). January is the month when Allendale sees the lowest average temperatures, with a high of 37.9°F (3.3°C) and a low of 24.8°F (-4°C). Weather in January »

Weather in February

The last month of the winter, February, is a chilly month in Allendale, Illinois, with an average temperature fluctuating between 43°F (6.1°C) and 29.1°F (-1.6°C). With the advent of February, Allendale's high-temperatures adjust to a frosty 43°F (6.1°C), closely aligning with the preceding month. Weather in February »

Weather in March

The first month of the spring, March, is a cool month in Allendale, Illinois, with an average temperature ranging between min 38.3°F (3.5°C) and max 53.8°F (12.1°C). March's arrival brings a temperature shift, moving from a chilly 43°F (6.1°C) in February to a fresh 53.8°F (12.1°C). Weather in March »

Weather in April

April is a refreshing spring month in Allendale, Illinois, with an average temperature varying between 64.9°F (18.3°C) and 48.2°F (9°C). As Allendale welcomes April, the average high-temperature sees a rise, transitioning from a fresh 53.8°F (12.1°C) in March to a comfortable 64.9°F (18.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderately hot month in Allendale, Illinois, with temperature in the range of an average high of 74.3°F (23.5°C) and an average low of 58.1°F (14.5°C). The start of May brings a rise in the average high-temperature, moving from a comfortable 64.9°F (18.3°C) in April to a warm 74.3°F (23.5°C). Weather in May »

Weather in June

June, the first month of the summer in Allendale, is also a moderately hot month, with an average temperature fluctuating between 82.9°F (28.3°C) and 65.8°F (18.8°C). A slight uplift of average high-temperatures is noted in June, with temperatures adjusting from 74.3°F (23.5°C) in May to a still moderately hot 82.9°F (28.3°C). Weather in June »

Weather in July

July, like June, in Allendale, Illinois, is another warm summer month, with temperature in the range of an average high of 84.7°F (29.3°C) and an average low of 67.5°F (19.7°C). Allendale's July weather reaches an average high of 84.7°F (29.3°C) and an average low of 67.5°F (19.7°C), making it the warmest month. During July, the heat index is evaluated at a torrid 96.8°F (36°C). Weather in July »

Weather in August

August, the last month of the summer in Allendale, is another warm month, with temperature in the range of an average high of 83.1°F (28.4°C) and an average low of 65.7°F (18.7°C). As July transitions into August, Allendale records an average high-temperature of a still warm 83.1°F (28.4°C), showing a gentle shift from the preceding month. Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Allendale, Illinois, with an average temperature fluctuating between 60.6°F (15.9°C) and 78.8°F (26°C). The introduction of September sees an average high-temperature of a still warm 78.8°F (26°C), hardly deviating from August. Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Allendale, Illinois, with an average temperature fluctuating between 49.6°F (9.8°C) and 66.6°F (19.2°C). Onset of October witnesses a reduction in the average high-temperature, falling from a moderately hot 78.8°F (26°C) in September to an enjoyable 66.6°F (19.2°C). Weather in October »

Weather in November

November, the last month of the autumn in Allendale, is also a fresh month, with temperature in the range of an average low of 38.3°F (3.5°C) and an average high of 52.9°F (11.6°C). Stepping into November, Allendale observes a temperature decline, with the average high falling from October's refreshing 66.6°F (19.2°C) to a fresh 52.9°F (11.6°C). Weather in November »

Weather in December

December, the first month of the winter in Allendale, is still a chilly month, with an average temperature varying between 31.3°F (-0.4°C) and 42.8°F (6°C). In the transition to December, Allendale observes a drop in the average high-temperature, moving from a cool 52.9°F (11.6°C) in November to a frosty 42.8°F (6°C). Weather in December »
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Frequently asked questions

What month is the coldest in Allendale?

The coldest month in Allendale is January, with an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 24.8°F (-4°C).

How much does it rain in Allendale?

In Allendale, Illinois, during the entire year, the rain falls for 155.6 days and collects up to 34.65" (880mm) of precipitation.

When does it snow in Allendale?

January through April, November and December are months with snowfall.

What is the snowiest month in Allendale?

The month with the most snowfall in Allendale is January, when snow falls for 6.8 days and typically aggregates up to 1.46" (37mm) of snow.

How much does it snow in Allendale?

In Allendale, during the entire year, snow falls for 21 days and aggregates up to 5.39" (137mm) of snow.

What is the month with the least sunshine in Allendale?

The month with the least sunshine in Allendale is January, with an average of 4.3h of sunshine.

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

The months with the lowest UV index in Allendale, Illinois, are January, February, November and December, with an average maximum UV index of 2.

When is Daylight Saving Time (DST) in Allendale?

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

April is the month with the most rainfall. Rain falls for 16.4 days and accumulates 4.72" (120mm) of precipitation.

What is the most humid month in Allendale?

The months with the highest humidity are May and July, with an average relative humidity of 80%.

When it does not snow in Allendale?

In Allendale, Illinois, snow does not fall in May through October.

When is the highest UV index in Allendale?

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

When are the longest days in Allendale?

June has the longest days of the year, with an average of 14h and 48min of daylight.

What month has the most sunshine in Allendale?

The month with the most sunshine in Allendale is June, with an average of 10.6h of sunshine.

What time of the year is the hottest in Allendale?

July is the month that records the highest temperatures, with averages ranging from a high of 84.7°F (29.3°C) to a low of 67.5°F (19.7°C).

What is the driest month in Allendale?

The month with the least rainfall in Allendale is September, when the rain falls for 12.3 days and typically collects 1.85" (47mm) of precipitation.

What is the least humid month in Allendale?

The least humid month is October, with an average relative humidity of 70%.

What is the month with the shortest days in Allendale?

With an average of 9h and 30min of daylight, December has the shortest days of the year.

Average temperature
Allendale, IL

Average temperature - Allendale, IL

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37.9°F).

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

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Average pressure
Allendale, IL

Average pressure - Allendale, IL

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed
Allendale, IL

Average wind speed - Allendale, IL

The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).

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Average humidity
Allendale, IL

Average humidity - Allendale, IL

The months with the highest relative humidity are May and July (80%).
The month with the lowest relative humidity is October (70%).

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Average rainfall
Allendale, IL

Average rainfall - Allendale, IL

The wettest month (with the highest rainfall) is April (4.72").
The driest month (with the least rainfall) is September (1.85").

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Average rainfall days
Allendale, IL

Average rainfall days - Allendale, IL

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (9.4 days).

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Average snowfall
Allendale, IL

Average snowfall - Allendale, IL

The month with the highest snowfall is January (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days
Allendale, IL

Average snowfall days - Allendale, IL

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Allendale, IL

Average daylight / Average sunshine - Allendale, IL

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

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Average sunshine days
Allendale, IL

Average sunshine days - Allendale, IL

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (10.3 days).

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Average UV index
Allendale, IL

Average UV index - Allendale, IL

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average visibility
Allendale, IL

Average visibility - Allendale, IL

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).

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Allendale, Illinois, USA

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