Climate and monthly weather forecast
Nelson, IL

Weather in January

January, like December, is a freezing cold winter month in Nelson, Illinois, with an average temperature varying between 14.9°F (-9.5°C) and 27.7°F (-2.4°C). With an average high-temperature of 27.7°F (-2.4°C) and an average low-temperature of 14.9°F (-9.5°C), January is the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Nelson, is another freezing cold month, with temperature in the range of an average low of 18.5°F (-7.5°C) and an average high of 31.6°F (-0.2°C). In February, the average high-temperature is essentially the same as in January - a still subzero cold 31.6°F (-0.2°C). Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Nelson, Illinois, with temperature in the range of an average low of 31.3°F (-0.4°C) and an average high of 45.9°F (7.7°C). In March, the average high-temperature rises from a subzero cold 31.6°F (-0.2°C) in February to a chilly 45.9°F (7.7°C). Weather in March »

Weather in April

April in Nelson, Illinois, is a mild spring month, with an average temperature fluctuating between 41.4°F (5.2°C) and 57.9°F (14.4°C). In April, the average high-temperature rises from a frosty 45.9°F (7.7°C) in March to a moderate 57.9°F (14.4°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in Nelson, Illinois, with temperature in the range of an average high of 69.4°F (20.8°C) and an average low of 52.5°F (11.4°C). In May, the average high-temperature increases from a moderate 57.9°F (14.4°C) in April to a pleasant 69.4°F (20.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Nelson, Illinois, with an average temperature ranging between max 78.3°F (25.7°C) and min 61.3°F (16.3°C). In Nelson, Illinois, the average high-temperature in June marginally rises from an agreeable 69.4°F (20.8°C) in May to a warm 78.3°F (25.7°C). Weather in June »

Weather in July

July, like June, in Nelson, Illinois, is a moderately hot summer month, with an average temperature fluctuating between 80.2°F (26.8°C) and 63.9°F (17.7°C). July is the warmest month, with an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 63.9°F (17.7°C). Weather in July »

Weather in August

August, the last month of the summer in Nelson, is another warm month, with an average temperature fluctuating between 61.7°F (16.5°C) and 79.3°F (26.3°C). In August, the average high-temperature is almost the same as in July - a still moderately hot 79.3°F (26.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Nelson, Illinois, with an average temperature fluctuating between 55.2°F (12.9°C) and 73.9°F (23.3°C). In Nelson, the average high-temperature in September slightly decreases from 79.3°F (26.3°C) in August to a still warm 73.9°F (23.3°C). Weather in September »

Weather in October

October, the same as September, in Nelson, Illinois, is a moderate autumn month, with an average temperature fluctuating between 44.6°F (7°C) and 60.6°F (15.9°C). In October, the average high-temperature drops from a moderately hot 73.9°F (23.3°C) in September to a moderate 60.6°F (15.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Nelson, Illinois, with temperature in the range of an average low of 32.4°F (0.2°C) and an average high of 45.5°F (7.5°C). In November, the average high-temperature declines considerably from a mild 60.6°F (15.9°C) in October to a frosty 45.5°F (7.5°C). Weather in November »

Weather in December

December, the first month of the winter in Nelson, is also a wintry month, with an average temperature ranging between min 23.2°F (-4.9°C) and max 33.8°F (1°C). In December, the average high-temperature decreases from a chilly 45.5°F (7.5°C) in November to a wintry 33.8°F (1°C). Weather in December »
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FAQ

What is the coldest month in Nelson?

The coldest month in Nelson, Illinois, is January, with an average high-temperature of 27.7°F (-2.4°C) and an average low-temperature of 14.9°F (-9.5°C).

What is the most humid month in Nelson?

January and July, with an average relative humidity of 85%, are most humid months.

What is the driest month in Nelson?

The months with the least rainfall in Nelson, Illinois, are January and February Rain falls for 4.8 days and accumulates 0.75" (19mm) of rain.

How many days does it rain in Nelson?

In Nelson, during the entire year, the rain falls for 130.2 days and collects up to 17.36" (441mm) of precipitation.

When does it snow in Nelson?

January through April, October through December are months with snowfall in Nelson, Illinois.

When does it snow the most in Nelson?

The month with the most snowfall is January, when snow falls for 10.2 days and typically aggregates up to 2.56" (65mm) of snow.

How much does it snow in Nelson?

Throughout the year, in Nelson, there are 34.2 snowfall days, and 7.87" (200mm) of snow is accumulated.

What is the month with the least sunshine in Nelson?

The month with the least sunshine is January, with an average of 3.8h of sunshine.

When is Daylight Saving Time (DST) in Nelson?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

What is the rainiest month in Nelson?

The month with the most rainfall is May, when the rain falls for 17.3 days and typically aggregates up to 2.83" (72mm) of precipitation.

When it does not snow in Nelson?

In Nelson, snow does not fall in May through September.

When are the longest days in Nelson?

June has the longest days of the year in Nelson, Illinois, with an average of 15h and 10min of daylight.

What is the warmest month in Nelson?

July is the warmest month in Nelson, Illinois, with an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 63.9°F (17.7°C).

What month has the most sunshine in Nelson?

With an average of 9.8h of sunshine, July has the most sunshine of the year in Nelson, Illinois.

When is the highest UV index in Nelson?

With an average maximum UV index of 6, July is the month with the highest UV index.

What is the least humid month in Nelson?

October is the least humid month, with an average relative humidity of 73%.

What is the month with the shortest days in Nelson?

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

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

The month with the lowest UV index in Nelson is December, with an average maximum UV index of 1.

Average temperature
Nelson, IL

Average temperature - Nelson, IL

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27.7°F).

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).

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Average pressure
Nelson, IL

Average pressure - Nelson, IL

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed
Nelson, IL

Average wind speed - Nelson, IL

The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

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Average humidity
Nelson, IL

Average humidity - Nelson, IL

The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (73%).

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Average rainfall
Nelson, IL

Average rainfall - Nelson, IL

The wettest month (with the highest rainfall) is May (2.83").
The driest months (with the least rainfall) are January and February (0.75").

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Average rainfall days
Nelson, IL

Average rainfall days - Nelson, IL

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (4.8 days).

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Average snowfall
Nelson, IL

Average snowfall - Nelson, IL

The month with the highest snowfall is January (2.56").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Nelson, IL

Average snowfall days - Nelson, IL

The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight / Average sunshine
Nelson, IL

Average daylight / Average sunshine - Nelson, IL

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: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days
Nelson, IL

Average sunshine days - Nelson, IL

The months with the most sunshine days are November and December (18.8 days).
The month with the least sunshine days is June (11.3 days).

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Average visibility
Nelson, IL

Average visibility - Nelson, IL

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

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