Yearly & Monthly weather

Climate and monthly weather forecast

Weather in January

January, like December, in Gross, Illinois, is a wintry winter month, with an average temperature fluctuating between -2.9°C and 4.3°C. During the coldest month, January, temperatures average a high of 4.3°C and a low of -2.9°C. Weather in January »

Weather in February

February, the last month of the winter in Gross, is a frosty month, with an average temperature varying between 7°C and -0.8°C. The arrival of February brings an average high-temperature of a chilly 7°C, subtly diverging from January's 4.3°C. Weather in February »

Weather in March

The first month of the spring, March, is a moderate month in Gross, Illinois, with an average temperature ranging between min 4.2°C and max 13°C. The transition from February to March brings a temperature rise, with average high-temperatures increasing from a frosty 7°C to a mild 13°C. Weather in March »

Weather in April

April is an enjoyable spring month in Gross, Illinois, with an average temperature varying between 19.1°C and 9.4°C. As Gross welcomes April, the average high-temperature sees a rise, transitioning from 13°C in March to a still refreshing 19.1°C. Weather in April »

Weather in May

The last month of the spring, May, is a moderately hot month in Gross, Illinois, with temperature in the range of an average high of 24.2°C and an average low of 14.6°C. An escalation in the average high-temperature is seen with the onset of May, moving from a refreshing 19.1°C in April to a warm 24.2°C. Weather in May »

Weather in June

June, the first month of the summer in Gross, is also a moderately hot month, with an average temperature fluctuating between 19.1°C and 28.9°C. Entering June, Gross notices a subtle temperature elevation, with the average high-temperature advancing from May's 24.2°C to a still warm 28.9°C. Weather in June »

Weather in July

July in Gross, Illinois, is a hot summer month, with temperature in the range of an average low of 20.2°C and an average high of 30.1°C. July is the warmest month of the year, registering average temperatures as high as 30.1°C and as low as 20.2°C. July's mean heat index is computed to be a torrid 37°C. Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Gross, Illinois, with an average temperature varying between 29.4°C and 19°C. The onset of August manifests an average high-temperature of a warm 29.4°C, demonstrating a minor variation from the preceding month. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Gross, Illinois, with an average temperature ranging between max 26.6°C and min 16°C. The onset of September manifests an average high-temperature of a still warm 26.6°C, demonstrating a minor variation from the preceding month. Weather in September »

Weather in October

October, like September, in Gross, Illinois, is another refreshing autumn month, with temperature in the range of an average low of 9.8°C and an average high of 19.9°C. October brings a minor decrease, with the average high-temperature reducing from a moderately hot 26.6°C in September to a refreshing 19.9°C. Weather in October »

Weather in November

November, the last month of the autumn in Gross, is another cool month, with an average temperature fluctuating between 12.3°C and 3.8°C. Arrival of November comes with a reduction in the average high-temperature, falling from a refreshing 19.9°C in October to a fresh 12.3°C. Weather in November »

Weather in December

The first month of the winter, December, is still a chilly month in Gross, Illinois, with an average temperature ranging between min 0.5°C and max 7°C. December comes with a drop in the average high-temperature, falling from November's cool 12.3°C to a frosty 7°C. Weather in December »

Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year?

Gross reaches its average lowest temperatures in January, measuring 4.3°C at the peak and -2.9°C at the lowest.

How many days does it rain in Gross?

Throughout the year, there are 146.3 rainfall days, and 634mm of precipitation is accumulated.

When does it snow?

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

How much does it snow?

Throughout the year, there are 15.9 snowfall days, and 91mm of snow is accumulated.

What is the month with the least sunshine?

With an average of 4.5h of sunshine, January has the least sunshine of the year.

When is the lowest UV index?

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

When does it snow the most?

The month with the most snowfall in Gross is February, when snow falls for 4.3 days and typically aggregates up to 22mm of snow.

When is Daylight Saving Time (DST)?

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?

The month with the most rainfall is April, when the rain falls for 14.7 days and typically aggregates up to 83mm of precipitation.

What is the most humid month?

With an average relative humidity of 80%, May is the most humid month.

When it does not snow?

In Gross, snow does not fall in May through October.

When is the highest UV index?

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

When are the longest days in Gross?

The month with the longest days is June, with an average of 14h and 42min of daylight.

What time of the year is the hottest in Gross?

July, noted for its average high-temperature of 30.1°C and an average low-temperature of 20.2°C, is considered the warmest month.

What month has the most sunshine?

The month with the most sunshine is July, with an average of 10.6h of sunshine.

What is the driest month?

September is the month with the least rainfall. Rain falls for 10.8 days and accumulates 29mm of precipitation.

What is the least humid month?

With an average relative humidity of 70%, October is the least humid month.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 36min of daylight.

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Long-term

Year J F M A M J J A S O N D

Average temperature
Gross, IL

Average high temperature in January:
4.3°C
Average high temperature in February:
7°C
Average high temperature in March:
13°C
Average high temperature in April:
19.1°C
Average high temperature in May:
24.2°C
Average high temperature in June:
28.9°C

Average high temperature in July:
30.1°C
Average high temperature in August:
29.4°C
Average high temperature in September:
26.6°C
Average high temperature in October:
19.9°C
Average high temperature in November:
12.3°C
Average high temperature in December:
7°C

The warmest month (with the highest average high temperature) is July (30.1°C).
The month with the lowest average high temperature is January (4.3°C).

Average low temperature in January:
-2.9°C
Average low temperature in February:
-0.8°C
Average low temperature in March:
4.2°C
Average low temperature in April:
9.4°C
Average low temperature in May:
14.6°C
Average low temperature in June:
19.1°C

Average low temperature in July:
20.2°C
Average low temperature in August:
19°C
Average low temperature in September:
16°C
Average low temperature in October:
9.8°C
Average low temperature in November:
3.8°C
Average low temperature in December:
0.5°C

The month with the highest average low temperature is July (20.2°C).
The coldest month (with the lowest average low temperature) is January (-2.9°C).

Average pressure
Gross, IL

Average pressure in July:
1015.3mbar
Average pressure in August:
1015.5mbar
Average pressure in September:
1016.9mbar
Average pressure in October:
1017.5mbar
Average pressure in November:
1020.8mbar
Average pressure in December:
1020.6mbar

The month with the highest atmospheric pressure is January (1021.5mbar).
The month with the lowest atmospheric pressure is June (1014.1mbar).

Average wind speed
Gross, IL

Average wind speed in January:
15.6km/h
Average wind speed in February:
15.8km/h
Average wind speed in March:
15.5km/h
Average wind speed in April:
15.5km/h
Average wind speed in May:
12.9km/h
Average wind speed in June:
10.8km/h

Average wind speed in July:
9.3km/h
Average wind speed in August:
9.4km/h
Average wind speed in September:
10.5km/h
Average wind speed in October:
13.2km/h
Average wind speed in November:
14.1km/h
Average wind speed in December:
14.6km/h

The windiest month (with the highest average wind speed) is February (15.8km/h).
The calmest month (with the lowest average wind speed) is July (9.3km/h).

Average humidity
Gross, IL

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

Average rainfall
Gross, IL

The wettest month (with the highest rainfall) is April (83mm).
The driest month (with the least rainfall) is September (29mm).

Average rainfall days
Gross, IL

Average rainfall days in January:
9.3 days
Average rainfall days in February:
9.8 days
Average rainfall days in March:
13.5 days
Average rainfall days in April:
14.7 days
Average rainfall days in May:
16.7 days
Average rainfall days in June:
14.3 days

Average rainfall days in July:
15 days
Average rainfall days in August:
13.3 days
Average rainfall days in September:
10.8 days
Average rainfall days in October:
9.5 days
Average rainfall days in November:
9 days
Average rainfall days in December:
10.4 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (9 days).

Average snowfall
Gross, IL

The month with the highest snowfall is February (22mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days
Gross, IL

Average snowfall days in January:
4.8 days
Average snowfall days in February:
4.3 days
Average snowfall days in March:
1.8 days
Average snowfall days in April:
0.3 days
Average snowfall days in May:
0 days
Average snowfall days in June:
0 days

Average snowfall days in July:
0 days
Average snowfall days in August:
0 days
Average snowfall days in September:
0 days
Average snowfall days in October:
0.1 days
Average snowfall days in November:
1.1 days
Average snowfall days in December:
3.5 days

The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Gross, IL

Average daylight in January:
9h and 5min
Average daylight in February:
10h and 5min
Average daylight in March:
12h and 0min
Average daylight in April:
13h and 1min
Average daylight in May:
14h and 1min
Average daylight in June:
14h and 4min

Average daylight in July:
14h and 3min
Average daylight in August:
13h and 4min
Average daylight in September:
12h and 2min
Average daylight in October:
11h and 1min
Average daylight in November:
10h and 1min
Average daylight in December:
9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

Average sunshine in January:
4h and 3min
Average sunshine in February:
4h and 5min
Average sunshine in March:
6h and 2min
Average sunshine in April:
8h and 5min
Average sunshine in May:
9h and 2min
Average sunshine in June:
10h and 3min

Average sunshine in July:
10h and 4min
Average sunshine in August:
10h and 2min
Average sunshine in September:
9h and 1min
Average sunshine in October:
6h and 5min
Average sunshine in November:
5h and 4min
Average sunshine in December:
4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

Average sunshine days
Gross, IL

Average sunshine days in January:
17 days
Average sunshine days in February:
14.6 days
Average sunshine days in March:
14.1 days
Average sunshine days in April:
13.3 days
Average sunshine days in May:
11.2 days
Average sunshine days in June:
12.1 days

Average sunshine days in July:
12.3 days
Average sunshine days in August:
15.3 days
Average sunshine days in September:
17 days
Average sunshine days in October:
20.5 days
Average sunshine days in November:
19.3 days
Average sunshine days in December:
17.2 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (11.2 days).

Average UV index
Gross, 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 and December (UV index 2).

Average cloud cover
Gross, IL

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).

Average visibility
Gross, IL

The month with the highest visibility is November (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).

°Celsius °Fahrenheit

Climate and monthly weather forecastGross, IL

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