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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 Dorchester, Illinois, with an average temperature varying between 22.6°F (-5.2°C) and 35.6°F (2°C). In Dorchester, Illinois, January is the coldest month, with temperatures averaging a high of 35.6°F (2°C) and a low of 22.6°F (-5.2°C). Weather in January »
Weather in February
The last month of the winter, February, is another cold month in Dorchester, Illinois, with an average temperature fluctuating between 40.6°F (4.8°C) and 26.4°F (-3.1°C). Dorchester registers an average high-temperature of a still wintry 40.6°F (4.8°C) with the arrival of February, showing minor deviation from the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Dorchester, is a cool month, with an average temperature fluctuating between 52.3°F (11.3°C) and 36.9°F (2.7°C). As March arrives, Dorchester's weather shows an increase in high-temperatures, moving from February's icy 40.6°F (4.8°C) to a cool 52.3°F (11.3°C). Weather in March »
Weather in April
April is a comfortable spring month in Dorchester, Illinois, with an average temperature fluctuating between 46.6°F (8.1°C) and 63.9°F (17.7°C). The beginning of April marks a shift in the average high-temperature, moving from March's cool 52.3°F (11.3°C) to a comfortable 63.9°F (17.7°C). Weather in April »
Weather in May
May, the last month of the spring in Dorchester, is a warm month, with an average temperature ranging between min 56.7°F (13.7°C) and max 73.9°F (23.3°C). With the onset of May, Dorchester sees a temperature rise, with the average high-temperature moving from April's enjoyable 63.9°F (17.7°C) to a moderately hot 73.9°F (23.3°C). Weather in May »
Weather in June
June, the first month of the summer in Dorchester, is still a warm month, with an average temperature ranging between max 82.2°F (27.9°C) and min 65.5°F (18.6°C). Dorchester perceives a slight temperature ascent during June, with average high-temperatures adjusting from a warm 73.9°F (23.3°C) in May to a still moderately hot 82.2°F (27.9°C). Weather in June »
Weather in July
July, like June, in Dorchester, Illinois, is a moderately hot summer month, with an average temperature varying between 84.2°F (29°C) and 67.5°F (19.7°C). July, recognised by an average high temperature of 84.2°F (29°C) and a low of 67.5°F (19.7°C), is Dorchester's warmest month. Throughout July, the heat index is estimated at a very hot 95°F (35°C). Weather in July »
Weather in August
August, the last month of the summer in Dorchester, is also a moderately hot month, with temperature in the range of an average low of 65.5°F (18.6°C) and an average high of 82.9°F (28.3°C). The average high-temperature for August is a still warm 82.9°F (28.3°C), closely aligning with the temperature of the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Dorchester, Illinois, with an average temperature ranging between min 59.4°F (15.2°C) and max 77.9°F (25.5°C). During September, Dorchester observes a subtle ascent to a still moderately hot 77.9°F (25.5°C) from August's 82.9°F (28.3°C) in the average high-temperature. Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Dorchester, Illinois, with an average temperature fluctuating between 48.4°F (9.1°C) and 65.3°F (18.5°C). A change in temperatures is noted as September gives way to October, with average highs reducing from a warm 77.9°F (25.5°C) to a refreshing 65.3°F (18.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Dorchester, Illinois, with temperature in the range of an average low of 36.9°F (2.7°C) and an average high of 51.6°F (10.9°C). In Dorchester, the average high-temperature in November decreases from a refreshing 65.3°F (18.5°C) in October to a cool 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 Dorchester, Illinois, with an average temperature fluctuating between 29.1°F (-1.6°C) and 40.3°F (4.6°C). December's onset brings a slight change in high-temperatures, falling from a fresh 51.6°F (10.9°C) in November to an icy 40.3°F (4.6°C). Weather in December »
Updated: Feb 12, 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 month is the coldest in Dorchester?
Temperature records in Dorchester mark January as the coldest month, with highs averaging 35.6°F (2°C) and lows at 22.6°F (-5.2°C).
How much does it rain in Dorchester?
In Dorchester, during the entire year, the rain falls for 121.4 days and collects up to 14.72" (374mm) of precipitation.
When does it snow in Dorchester?
Months with snowfall in Dorchester, Illinois, are January through March, November and December.
How many days does it snow in Dorchester?
Throughout the year, in Dorchester, Illinois, there are 19.8 snowfall days, and 2.91" (74mm) of snow is accumulated.
What is the month with the least sunshine in Dorchester?
With an average of 4.4h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Dorchester?
The months with the lowest UV index in Dorchester are January, February, November and December, with an average maximum UV index of 2.
What is the driest month in Dorchester?
February is the month with the least rainfall in Dorchester. Rain falls for 5.9 days and accumulates 0.67" (17mm) of precipitation.
When is Daylight Saving Time (DST) in Dorchester?
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 Dorchester?
April through October are months without snowfall in Dorchester.
What is the rainiest month in Dorchester?
June is the month with the most rainfall. Rain falls for 13.4 days and accumulates 1.89" (48mm) of precipitation.
When are the longest days in Dorchester?
With an average of 14h and 54min of daylight, June has the longest days of the year in Dorchester, Illinois.
What are the months with the most sunshine in Dorchester?
The months with the most sunshine in Dorchester are June and July, with an average of 10.3h of sunshine.
What is the month with the highest UV index in Dorchester?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the warmest month in Dorchester?
In Dorchester, July is the warmest month, with temperatures averaging a high of 84.2°F (29°C) and a low of 67.5°F (19.7°C).
What is the most humid month in Dorchester?
The most humid month in Dorchester, Illinois, is July, with an average relative humidity of 81%.
What is the least humid month in Dorchester?
The least humid month in Dorchester, Illinois, is October, with an average relative humidity of 71%.
What is the snowiest month in Dorchester?
December is the month with the most snowfall in Dorchester. Snow falls for 3.8 days and accumulates 0.98" (25mm) of snow.
What is the month with the shortest days in Dorchester?
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Dorchester, 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
Dorchester, 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
Dorchester, 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
Dorchester, IL
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Dorchester, 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
Dorchester, 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
Dorchester, 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
Dorchester, 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
Dorchester, 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
Dorchester, 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
Dorchester, 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
Dorchester, 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
Dorchester, 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).
Dorchester, Illinois, USA
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