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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, the same as December, is a wintry winter month in Griggsville, Illinois, with temperature in the range of an average high of 33.8°F (1°C) and an average low of 21.6°F (-5.8°C). Griggsville records the coldest temperatures in January, averaging a high of 33.8°F (1°C) and a low of 21.6°F (-5.8°C). Weather in January »
Weather in February
The last month of the winter, February, is also a wintry month in Griggsville, Illinois, with an average temperature ranging between min 25°F (-3.9°C) and max 38.8°F (3.8°C). February's climate shows a minor adjustment in average high-temperatures to a still wintry 38.8°F (3.8°C) from January's 33.8°F (1°C). Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Griggsville, Illinois, with an average temperature fluctuating between 36°F (2.2°C) and 51.4°F (10.8°C). As Griggsville welcomes March, the average high-temperature sees a rise, transitioning from an icy 38.8°F (3.8°C) in February to a cool 51.4°F (10.8°C). Weather in March »
Weather in April
April in Griggsville, Illinois, is an enjoyable spring month, with temperature in the range of an average high of 63.5°F (17.5°C) and an average low of 46°F (7.8°C). As April sets, the average high-temperature shows an increase, moving up from a fresh 51.4°F (10.8°C) in March to an enjoyable 63.5°F (17.5°C). Weather in April »
Weather in May
May, the last month of the spring in Griggsville, is a pleasant month, with an average temperature ranging between min 55.8°F (13.2°C) and max 72.3°F (22.4°C). With the start of May, the average high-temperature marginally shifts from April's refreshing 63.5°F (17.5°C) to an agreeable 72.3°F (22.4°C). Weather in May »
Weather in June
June, the first month of the summer in Griggsville, is a moderately hot month, with an average temperature varying between 82°F (27.8°C) and 64.6°F (18.1°C). As Griggsville transitions into June, a rise in the average high-temperature is observed, moving from a pleasant 72.3°F (22.4°C) in May to a warm 82°F (27.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Griggsville, Illinois, with an average temperature fluctuating between 66.7°F (19.3°C) and 84.4°F (29.1°C). In Griggsville, the peak temperatures are generally noted in July, averaging a high of 84.4°F (29.1°C) and a low of 66.7°F (19.3°C). Throughout July, the heat index is calculated to be a torrid 95°F (35°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Griggsville, Illinois, with an average temperature ranging between max 83.5°F (28.6°C) and min 65.5°F (18.6°C). Griggsville experiences a subtle adjustment in high-temperatures to a still moderately hot 83.5°F (28.6°C) with the onset of August, maintaining near parity with July's 84.4°F (29.1°C). Weather in August »
Weather in September
September, the first month of the autumn in Griggsville, is also a moderately hot month, with temperature in the range of an average low of 58.6°F (14.8°C) and an average high of 78.3°F (25.7°C). Griggsville's weather in September indicates an average high-temperature of a still moderately hot 78.3°F (25.7°C), nearly consistent with the 83.5°F (28.6°C) of August. Weather in September »
Weather in October
October, like September, in Griggsville, Illinois, is another enjoyable autumn month, with an average temperature fluctuating between 47.3°F (8.5°C) and 64.2°F (17.9°C). The shift to October brings a decrease in the average high-temperature, falling from a warm 78.3°F (25.7°C) in September to a comfortable 64.2°F (17.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Griggsville, Illinois, with an average temperature fluctuating between 50.9°F (10.5°C) and 36.3°F (2.4°C). The onset of November comes with a shift in the average high-temperature, falling from a comfortable 64.2°F (17.9°C) in October to a cool 50.9°F (10.5°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Griggsville, Illinois, with an average temperature fluctuating between 27.9°F (-2.3°C) and 39°F (3.9°C). In December, the meteorological conditions alter, with the average high-temperature shifting from a cool 50.9°F (10.5°C) in November to an icy 39°F (3.9°C). Weather in December »
Updated: Jul 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
January, on average, is the coldest month, registering a high temperature of 33.8°F (1°C) and a low of 21.6°F (-5.8°C).
How many days does it rain?
In Griggsville, during the entire year, the rain falls for 128.8 days and collects up to 18.35" (466mm) of precipitation.
When does it snow?
January through April, November and December are months with snowfall.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 6.3 days and typically aggregates up to 2.05" (52mm) of snow.
How much does it snow?
Throughout the year, there are 21.9 snowfall days, and 5.67" (144mm) of snow is accumulated.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 4.4h of sunshine.
What are the months with the lowest UV index?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 5.8 days and typically collects 0.75" (19mm) of precipitation.
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 rainiest month?
The month with the most rainfall is May, when the rain falls for 16.8 days and typically aggregates up to 2.44" (62mm) of precipitation.
When it does not snow?
May through October are months without snowfall.
What is the most humid month?
June and July, with an average relative humidity of 81%, are most humid months.
When are the longest days in Griggsville?
June has the longest days of the year in Griggsville, with an average of 14h and 54min of daylight.
What is the month with the most sunshine?
June and July, with an average of 10.3h of sunshine, are months with the most sunshine.
What is the month with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What is the warmest month?
July tends to be the warmest month, with temperatures averaging a daily high of 84.4°F (29.1°C) and a low of 66.7°F (19.3°C).
What is the least humid month?
The least humid month is October, with an average relative humidity of 71%.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
Griggsville, IL
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (33.8°F).
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure
Griggsville, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Griggsville, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.7mph - Average wind speed in April:
9.8mph - Average wind speed in May:
7.9mph - Average wind speed in June:
7mph
- Average wind speed in July:
6mph - Average wind speed in August:
6.2mph - Average wind speed in September:
6.8mph - Average wind speed in October:
8.5mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.4mph
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 July (6mph).
Average humidity
Griggsville, IL
The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Griggsville, IL
- Average rainfall in January:
0.87" - Average rainfall in February:
0.75" - Average rainfall in March:
1.5" - Average rainfall in April:
1.89" - Average rainfall in May:
2.44" - Average rainfall in June:
2.36"
- Average rainfall in July:
1.69" - Average rainfall in August:
1.85" - Average rainfall in September:
1.65" - Average rainfall in October:
1.5" - Average rainfall in November:
0.98" - Average rainfall in December:
0.87"
The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is February (0.75").
Average rainfall days
Griggsville, IL
- Average rainfall days in January:
4.5 days - Average rainfall days in February:
5.8 days - Average rainfall days in March:
12.5 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
13.5 days - Average rainfall days in August:
12.4 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
10 days - Average rainfall days in November:
7.4 days - Average rainfall days in December:
7 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (4.5 days).
Average snowfall
Griggsville, IL
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Griggsville, IL
- Average snowfall days in January:
6.3 days - Average snowfall days in February:
5.5 days - Average snowfall days in March:
3.5 days - Average snowfall days in April:
0.7 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:
1.6 days - Average snowfall days in December:
4.2 days
The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Griggsville, 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 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - 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 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 4min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 3min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Griggsville, IL
- Average sunshine days in January:
20.5 days - Average sunshine days in February:
18 days - Average sunshine days in March:
14.2 days - Average sunshine days in April:
14.3 days - Average sunshine days in May:
12.9 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
13.7 days - Average sunshine days in August:
16.4 days - Average sunshine days in September:
17.3 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
20.1 days - Average sunshine days in December:
20.7 days
The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is June (12.3 days).
Average UV index
Griggsville, 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, February, November and December (UV index 2).
Average cloud cover
Griggsville, IL
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).
Average visibility
Griggsville, 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).
Griggsville, Illinois, USA
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