Expand
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, in Gillespie, Illinois, is a wintry winter month, with an average temperature varying between 22.6°F (-5.2°C) and 35.6°F (2°C). January is the coldest month, with an average high-temperature of 35.6°F (2°C) and an average low-temperature of 22.6°F (-5.2°C). Weather in January »
Weather in February
February, the last month of the winter in Gillespie, is also an icy month, with an average temperature ranging between max 40.6°F (4.8°C) and min 26.4°F (-3.1°C). With the advent of February, Gillespie's high-temperatures adjust to a still icy 40.6°F (4.8°C), closely aligning with the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Gillespie, is a fresh month, with temperature in the range of an average high of 52.3°F (11.3°C) and an average low of 36.9°F (2.7°C). The shift from February to March sees an increase in the average high-temperature, transitioning from a cold 40.6°F (4.8°C) to a fresh 52.3°F (11.3°C). Weather in March »
Weather in April
April is a refreshing spring month in Gillespie, Illinois, with temperature in the range of an average low of 46.6°F (8.1°C) and an average high of 63.9°F (17.7°C). The shift into April brings an increase in the average high-temperature, moving from a fresh 52.3°F (11.3°C) in March to an enjoyable 63.9°F (17.7°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Gillespie, Illinois, with an average temperature ranging between max 73.9°F (23.3°C) and min 56.7°F (13.7°C). May sees a temperature increase, moving from a comfortable 63.9°F (17.7°C) in April to a moderately hot 73.9°F (23.3°C). Weather in May »
Weather in June
June, the first month of the summer in Gillespie, is still a warm month, with an average temperature varying between 65.5°F (18.6°C) and 82.2°F (27.9°C). June's arrival is noted with a slight increase in the average high-temperature, moving from 73.9°F (23.3°C) in May to a still warm 82.2°F (27.9°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Gillespie, Illinois, with an average temperature varying between 67.5°F (19.7°C) and 84.2°F (29°C). In Gillespie, the month of July is known for its highest average temperatures, reaching a high of 84.2°F (29°C) and a low of 67.5°F (19.7°C). The heat index value for July is calculated to be a fiery hot 95°F (35°C). Weather in July »
Weather in August
August, the last month of the summer in Gillespie, is also a moderately hot month, with an average temperature fluctuating between 82.9°F (28.3°C) and 65.5°F (18.6°C). Gillespie's August showcases an average high-temperature of a still warm 82.9°F (28.3°C), hardly distinct from July's 84.2°F (29°C). Weather in August »
Weather in September
September, the first month of the autumn in Gillespie, is also a moderately hot month, with an average temperature varying between 59.4°F (15.2°C) and 77.9°F (25.5°C). Gillespie measures an average high-temperature of a still warm 77.9°F (25.5°C) in September, nearly consistent with the preceding month. Weather in September »
Weather in October
October, like September, in Gillespie, Illinois, is another comfortable autumn month, with temperature in the range of an average low of 48.4°F (9.1°C) and an average high of 65.3°F (18.5°C). October's arrival comes with a decrease in the average high-temperature, moving from a moderately hot 77.9°F (25.5°C) in September to a comfortable 65.3°F (18.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Gillespie, is another cool month, with an average temperature varying between 36.9°F (2.7°C) and 51.6°F (10.9°C). Gillespie's average high-temperature decreases in November, falling from an enjoyable 65.3°F (18.5°C) in October to a fresh 51.6°F (10.9°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Gillespie, Illinois, with an average temperature varying between 29.1°F (-1.6°C) and 40.3°F (4.6°C). The transition into December is accompanied by a temperature decrease, with the average high-temperature shifting from a fresh 51.6°F (10.9°C) in November to an icy 40.3°F (4.6°C). Weather in December »
Updated: Aug 6, 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 time of the year is the coldest?
Temperature readings in Gillespie reach their annual highs in January, averaging 35.6°F (2°C) and a minimum average of 22.6°F (-5.2°C).
How much does it rain in Gillespie?
Throughout the year, there are 121.4 rainfall days, and 14.72" (374mm) of precipitation is accumulated.
When does it snow?
January through March, November and December are months with snowfall in Gillespie.
How much does it snow?
In Gillespie, during the entire year, snow falls for 19.8 days and aggregates up to 2.91" (74mm) of snow.
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 5.9 days and typically collects 0.67" (17mm) 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.
When it does not snow?
In Gillespie, snow does not fall in April through October.
What is the rainiest month?
The month with the most rainfall is June, when the rain falls for 13.4 days and typically aggregates up to 1.89" (48mm) of precipitation.
When are the longest days?
The month with the longest days is June, with an average of 14h and 54min of daylight.
What are the months with the most sunshine?
The months with the most sunshine are June and July, with an average of 10.3h of sunshine.
What are the months with the highest UV index in Gillespie?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the hottest time of year?
The temperatures reach their highest averages in July, with highs of 84.2°F (29°C) and lows of 67.5°F (19.7°C).
What is the most humid month?
The most humid month is July, with an average relative humidity of 81%.
What is the least humid month?
With an average relative humidity of 71%, October is the least humid month.
What is the snowiest month?
The month with the most snowfall is December, when snow falls for 3.8 days and typically aggregates up to 0.98" (25mm) of snow.
What is the month with the shortest days?
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Gillespie, IL
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.6°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 (22.6°F).
Average pressure
Gillespie, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"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:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Gillespie, IL
- Average wind speed in January:
10mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.6mph - Average wind speed in April:
9.6mph - Average wind speed in May:
7.8mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.9mph - Average wind speed in September:
6.4mph - Average wind speed in October:
8.5mph - Average wind speed in November:
9.2mph - Average wind speed in December:
9.3mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity
Gillespie, IL
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Gillespie, IL
- Average rainfall in January:
1.02" - Average rainfall in February:
0.67" - Average rainfall in March:
1.02" - Average rainfall in April:
1.57" - Average rainfall in May:
1.81" - Average rainfall in June:
1.89"
The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days
Gillespie, IL
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
5.9 days - Average rainfall days in March:
10.7 days - Average rainfall days in April:
12.5 days - Average rainfall days in May:
13.9 days - Average rainfall days in June:
13.4 days
- Average rainfall days in July:
14 days - Average rainfall days in August:
12.1 days - Average rainfall days in September:
10.4 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
7.5 days - Average rainfall days in December:
6.7 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is January (5.8 days).
Average snowfall
Gillespie, IL
The month with the highest snowfall is December (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Gillespie, IL
- Average snowfall days in January:
6.3 days - Average snowfall days in February:
5.5 days - Average snowfall days in March:
2.5 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:
1.3 days - Average snowfall days in December:
3.8 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
Gillespie, 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 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 3min
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 30min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 3min - 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
Gillespie, IL
- Average sunshine days in January:
20.9 days - Average sunshine days in February:
17.2 days - Average sunshine days in March:
17 days - Average sunshine days in April:
14.6 days - Average sunshine days in May:
13.6 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
12.5 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
17.2 days - Average sunshine days in October:
19.7 days - Average sunshine days in November:
20.4 days - Average sunshine days in December:
20.5 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is July (12.5 days).
Average UV index
Gillespie, 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
Gillespie, 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
Gillespie, 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).
Gillespie, Illinois, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location