Climate and monthly weather forecastThayer, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Thayer, Illinois, with an average temperature varying between 34°F (1.1°C) and 21.7°F (-5.7°C). January, marked by an average high-temperature of 34°F (1.1°C) and a low-temperature of 21.7°F (-5.7°C), is the coldest month. Weather in January »Weather in February
The last month of the winter, February, is also a wintry month in Thayer, Illinois, with temperature in the range of an average high of 39°F (3.9°C) and an average low of 25.3°F (-3.7°C). The arrival of February brings an average high-temperature of a still icy 39°F (3.9°C), subtly diverging from January's 34°F (1.1°C). Weather in February »Weather in March
March, the first month of the spring in Thayer, is a fresh month, with an average temperature varying between 51.4°F (10.8°C) and 36.1°F (2.3°C). In March, the average high-temperature increases from a cold 39°F (3.9°C) in February to a cool 51.4°F (10.8°C). Weather in March »Weather in April
April is an enjoyable spring month in Thayer, Illinois, with temperature in the range of an average low of 46.2°F (7.9°C) and an average high of 63.3°F (17.4°C). April indicates a change in the average high-temperature, moving up from a fresh 51.4°F (10.8°C) in March to an enjoyable 63.3°F (17.4°C). Weather in April »Weather in May
May, the last month of the spring in Thayer, is a pleasant month, with an average temperature varying between 56.5°F (13.6°C) and 72.9°F (22.7°C). The onset of May marks an increase in the average high-temperature, moving from a refreshing 63.3°F (17.4°C) in April to a pleasant 72.9°F (22.7°C). Weather in May »Weather in June
June, the first month of the summer in Thayer, is a moderately hot month, with an average temperature varying between 81.5°F (27.5°C) and 64.9°F (18.3°C). June's arrival coincides with a marginal rise in the average high-temperature, moving from May's pleasant 72.9°F (22.7°C) to a moderately hot 81.5°F (27.5°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Thayer, Illinois, with an average temperature ranging between max 83.1°F (28.4°C) and min 66.7°F (19.3°C). The month of July, characterized by an average high of 83.1°F (28.4°C) and a low of 66.7°F (19.3°C), is recognized as the warmest. July's heat index is estimated at a hot 93.2°F (34°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Thayer, Illinois, with an average temperature varying between 82°F (27.8°C) and 64.8°F (18.2°C). Thayer's weather, upon August's arrival, documents an average high-temperature of a still warm 82°F (27.8°C), nearly identical to the prior month. Weather in August »Weather in September
September, the first month of the autumn in Thayer, is still a warm month, with an average temperature varying between 77.5°F (25.3°C) and 59.2°F (15.1°C). Thayer, Illinois, in September witnesses an average high-temperature of a still moderately hot 77.5°F (25.3°C), indicating a slight variation from August's 82°F (27.8°C). Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Thayer, Illinois, with temperature in the range of an average low of 48.2°F (9°C) and an average high of 64.4°F (18°C). The onset of October brings a small change in high-temperatures, falling from a moderately hot 77.5°F (25.3°C) in September to a refreshing 64.4°F (18°C). Weather in October »Weather in November
November, the last month of the autumn in Thayer, is also a fresh month, with temperature in the range of an average low of 36.3°F (2.4°C) and an average high of 50.9°F (10.5°C). The onset of November brings a small change in high-temperatures, falling from a comfortable 64.4°F (18°C) in October to a fresh 50.9°F (10.5°C). Weather in November »Weather in December
The first month of the winter, December, is also an icy month in Thayer, Illinois, with an average temperature fluctuating between 39.4°F (4.1°C) and 28.2°F (-2.1°C). Thayer's December weather features a mild decline in high-temperatures, reducing from a cool 50.9°F (10.5°C) in November to a wintry 39.4°F (4.1°C). Weather in December »Updated: Feb 12, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Thayer, Illinois, reaches its average lowest temperatures in January, measuring 34°F (1.1°C) at the peak and 21.7°F (-5.7°C) at the lowest.
Throughout the year, in Thayer, there are 143.6 rainfall days, and 23.74" (603mm) of precipitation is accumulated.
January through April, November and December are months with snowfall in Thayer, Illinois.
Throughout the year, there are 26.5 snowfall days, and 6.5" (165mm) of snow is accumulated.
January has the least sunshine of the year in Thayer, with an average of 4.2h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February and December are months with the least rain when the rain falls for 6.4 days and typically aggregates up to 1.26" (32mm) of rain.
The month with the most snowfall in Thayer is February, when snow falls for 6.8 days and typically aggregates up to 2.09" (53mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Thayer, Illinois, 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.
May through October are months without snowfall.
The month with the most rainfall is June, when the rain falls for 15 days and typically aggregates up to 2.83" (72mm) of precipitation.
June has the longest days of the year, with an average of 14h and 54min of daylight.
With an average of 10.2h of sunshine, June has the most sunshine of the year in Thayer, Illinois.
June through August, with an average maximum UV index of 6, are months with the highest UV index in Thayer, Illinois.
July is the warmest month, with an average high-temperature of 83.1°F (28.4°C) and an average low-temperature of 66.7°F (19.3°C).
July is the most humid month, with an average relative humidity of 83%.
The least humid month in Thayer, Illinois, is October, with an average relative humidity of 71%.
December has the shortest days of the year in Thayer, with an average of 9h and 24min of daylight.
Average temperature
Thayer, IL
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (34°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 (21.7°F).
Average pressure
Thayer, 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:
29.94"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:
29.97"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 (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Thayer, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10mph - Average wind speed in April:
10.1mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
6.2mph - Average wind speed in September:
6.9mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity
Thayer, IL
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Thayer, IL
- Average rainfall in January:
1.38" - Average rainfall in February:
1.26" - Average rainfall in March:
1.69" - Average rainfall in April:
2.8" - Average rainfall in May:
2.72" - Average rainfall in June:
2.83"
- Average rainfall in July:
2.17" - Average rainfall in August:
2.28" - Average rainfall in September:
1.81" - Average rainfall in October:
2.17" - Average rainfall in November:
1.38" - Average rainfall in December:
1.26"
The wettest month (with the highest rainfall) is June (2.83").
The driest months (with the least rainfall) are February and December (1.26").
Average rainfall days
Thayer, IL
- Average rainfall days in January:
6.7 days - Average rainfall days in February:
6.4 days - Average rainfall days in March:
12.2 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
15 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
15.3 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
11.1 days - Average rainfall days in November:
9.2 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (6.4 days).
Average snowfall
Thayer, IL
The month with the highest snowfall is February (2.09").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Thayer, IL
- Average snowfall days in January:
8 days - Average snowfall days in February:
6.8 days - Average snowfall days in March:
3 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:
1.8 days - Average snowfall days in December:
6.1 days
The month with the highest number of snowfall days is January (8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Thayer, IL
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
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 12min - Average sunshine in February:
4h and 18min - Average sunshine in March:
6h and 18min - Average sunshine in April:
8h and 0min - Average sunshine in May:
9h and 6min - Average sunshine in June:
10h and 12min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 42min - Average sunshine in September:
9h and 12min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 42min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Thayer, IL
- Average sunshine days in January:
17.1 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
14.9 days - Average sunshine days in April:
12.4 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
11.6 days - Average sunshine days in August:
13.1 days - Average sunshine days in September:
15.3 days - Average sunshine days in October:
18.7 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
18.1 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (11.5 days).
Average UV index
Thayer, 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
Thayer, IL
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility
Thayer, 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).
