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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a freezing cold winter month in Big Rock, Illinois, with an average temperature fluctuating between 15.8°F (-9°C) and 27.9°F (-2.3°C). Big Rock's temperature records reveal January as the coldest month, marked by average highs of 27.9°F (-2.3°C) and lows of 15.8°F (-9°C). Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Big Rock, Illinois, with an average temperature ranging between min 19°F (-7.2°C) and max 32°F (0°C). The arrival of February denotes a barely perceptible change in the average high-temperatures to an icy 32°F (0°C) from January's 27.9°F (-2.3°C). Weather in February »
Weather in March
March, the first month of the spring in Big Rock, is a frosty month, with temperature in the range of an average high of 45.5°F (7.5°C) and an average low of 30.7°F (-0.7°C). The shift into March is accompanied by a temperature increase, with the average high-temperature rising from a cold 32°F (0°C) in February to a chilly 45.5°F (7.5°C). Weather in March »
Weather in April
April is a moderate spring month in Big Rock, Illinois, with an average temperature fluctuating between 57°F (13.9°C) and 40.1°F (4.5°C). Big Rock experiences a temperature shift with the start of April, with average high-temperatures moving from a chilly 45.5°F (7.5°C) in March to a moderate 57°F (13.9°C). Weather in April »
Weather in May
May, the last month of the spring in Big Rock, is a pleasant month, with an average temperature ranging between max 69.1°F (20.6°C) and min 51.8°F (11°C). May's arrival is marked by an increase in the average high-temperature, moving from a mild 57°F (13.9°C) in April to a pleasant 69.1°F (20.6°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Big Rock, Illinois, with an average temperature fluctuating between 78.1°F (25.6°C) and 60.6°F (15.9°C). As June begins, there is an increase in the average high-temperature, moving from a pleasant 69.1°F (20.6°C) in May to a moderately hot 78.1°F (25.6°C). Weather in June »
Weather in July
July, like June, in Big Rock, Illinois, is a moderately hot summer month, with an average temperature varying between 63.3°F (17.4°C) and 80.6°F (27°C). The warmest temperatures occur during July, when averages reach a peak of 80.6°F (27°C) and a low of 63.3°F (17.4°C). In July, the heat index is appraised at a hot 86°F (30°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Big Rock, Illinois, with an average temperature varying between 79.2°F (26.2°C) and 61.7°F (16.5°C). August's presence records an average high-temperature of a still moderately hot 79.2°F (26.2°C), closely mirroring July's climate. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Big Rock, Illinois, with an average temperature varying between 73.8°F (23.2°C) and 55.4°F (13°C). September signifies a minor drop in average high-temperature, transitioning from a moderately hot 79.2°F (26.2°C) in August to a still warm 73.8°F (23.2°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Big Rock, Illinois, with an average temperature fluctuating between 44.4°F (6.9°C) and 60.3°F (15.7°C). In the transition to October, Big Rock observes a drop in the average high-temperature, moving from a warm 73.8°F (23.2°C) in September to a moderate 60.3°F (15.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Big Rock, is another chilly month, with an average temperature ranging between max 45.5°F (7.5°C) and min 32.7°F (0.4°C). As Big Rock steps into November, the average high-temperature decreases significantly from the a mild 60.3°F (15.7°C) of 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 Big Rock, Illinois, with an average temperature ranging between max 34.2°F (1.2°C) and min 23.7°F (-4.6°C). The average high-temperature drops in December, from November's chilly 45.5°F (7.5°C) to an icy 34.2°F (1.2°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest month in Big Rock?
Big Rock, Illinois, experiences its average lowest temperatures in January, reaching a peak of 27.9°F (-2.3°C) and a minimum of 15.8°F (-9°C).
What are the most humid months in Big Rock?
January, July and August, with an average relative humidity of 84%, are most humid months in Big Rock, Illinois.
How many days does it rain in Big Rock?
In Big Rock, Illinois, during the entire year, the rain falls for 156.4 days and collects up to 30.98" (787mm) of precipitation.
When does it snow in Big Rock?
January through May, October through December are months with snowfall in Big Rock.
What is the snowiest month in Big Rock?
The month with the most snowfall is January, when snow falls for 13.1 days and typically aggregates up to 4.65" (118mm) of snow.
How many days does it snow in Big Rock?
In Big Rock, during the entire year, snow falls for 44.6 days and aggregates up to 15.2" (386mm) of snow.
What is the month with the least sunshine in Big Rock?
The month with the least sunshine in Big Rock, Illinois, is January, with an average of 3.7h of sunshine.
When is the lowest UV index in Big Rock?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
When is Daylight Saving Time (DST) in Big Rock?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Big Rock, 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 Big Rock?
The month with the most rainfall in Big Rock is May, when the rain falls for 18 days and typically aggregates up to 4.33" (110mm) of precipitation.
When it does not snow in Big Rock?
In Big Rock, Illinois, snow does not fall in June through September.
When are the longest days in Big Rock?
June has the longest days of the year in Big Rock, with an average of 15h and 12min of daylight.
What are the months with the highest UV index in Big Rock?
The months with the highest UV index in Big Rock are June through August, with an average maximum UV index of 6.
What are the warmest months in Big Rock?
With average high and low temperatures of 80.6°F (27°C) and 63.3°F (17.4°C) respectively, July is Big Rock's warmest month.
What month has the most sunshine in Big Rock?
August has the most sunshine of the year in Big Rock, Illinois, with an average of 9.6h of sunshine.
What is the least humid month in Big Rock?
October is the least humid month in Big Rock, Illinois, with an average relative humidity of 74%.
What is the driest month in Big Rock?
December is the month with the least rainfall in Big Rock. Rain falls for 7.8 days and accumulates 1.57" (40mm) of precipitation.
What is the month with the shortest days in Big Rock?
December has the shortest days of the year in Big Rock, with an average of 9h and 12min of daylight.
Average temperature
Big Rock, IL
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (27.9°F).
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure
Big Rock, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Big Rock, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.5mph - Average wind speed in April:
9.8mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6mph - Average wind speed in September:
7mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.3mph - Average wind speed in December:
9.1mph
The windiest months (with the highest average wind speed) are January, February and April (9.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity
Big Rock, IL
The months with the highest relative humidity are January, July and August (84%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Big Rock, IL
- Average rainfall in January:
1.73" - Average rainfall in February:
1.65" - Average rainfall in March:
1.97" - Average rainfall in April:
3.54" - Average rainfall in May:
4.33" - Average rainfall in June:
3.98"
- Average rainfall in July:
3.15" - Average rainfall in August:
2.4" - Average rainfall in September:
2.28" - Average rainfall in October:
2.72" - Average rainfall in November:
1.65" - Average rainfall in December:
1.57"
The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is December (1.57").
Average rainfall days
Big Rock, IL
- Average rainfall days in January:
6.5 days - Average rainfall days in February:
6 days - Average rainfall days in March:
12.1 days - Average rainfall days in April:
17.3 days - Average rainfall days in May:
18 days - Average rainfall days in June:
18.1 days
- Average rainfall days in July:
18.2 days - Average rainfall days in August:
15.7 days - Average rainfall days in September:
13 days - Average rainfall days in October:
13.8 days - Average rainfall days in November:
9.9 days - Average rainfall days in December:
7.8 days
The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is February (6 days).
Average snowfall
Big Rock, IL
- Average snowfall in January:
4.65" - Average snowfall in February:
3.43" - Average snowfall in March:
1.54" - Average snowfall in April:
1.42" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Big Rock, IL
- Average snowfall days in January:
13.1 days - Average snowfall days in February:
10.4 days - Average snowfall days in March:
6.2 days - Average snowfall days in April:
1.7 days - Average snowfall days in May:
0.2 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:
0.4 days - Average snowfall days in November:
3.5 days - Average snowfall days in December:
9.1 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Big Rock, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
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).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
9h and 3min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Big Rock, IL
- Average sunshine days in January:
14.3 days - Average sunshine days in February:
12.5 days - Average sunshine days in March:
13.9 days - Average sunshine days in April:
10.3 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
10.4 days
- Average sunshine days in July:
11.1 days - Average sunshine days in August:
13.6 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
15.3 days - Average sunshine days in November:
16.4 days - Average sunshine days in December:
15.7 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is April (10.3 days).
Average UV index
Big Rock, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Big Rock, IL
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility
Big Rock, IL
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Big Rock, Illinois, USA
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