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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, in Dorchester, Iowa, is a freezing cold winter month, with an average temperature varying between 21.7°F (-5.7°C) and 8.8°F (-12.9°C). In Dorchester, January records the lowest average temperatures, peaking at 21.7°F (-5.7°C) and reaching a low of 8.8°F (-12.9°C). Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Dorchester, Iowa, with an average temperature fluctuating between 25.7°F (-3.5°C) and 12.4°F (-10.9°C). The average high-temperature in February, at a still freezing cold 25.7°F (-3.5°C), reveals a modest deviation from January's 21.7°F (-5.7°C). Weather in February »
Weather in March
The first month of the spring, March, is a cold month in Dorchester, Iowa, with an average temperature fluctuating between 41°F (5°C) and 26.1°F (-3.3°C). Dorchester, Iowa, experiences a clear temperature upsurge in March, with average high-temperatures moving from a subzero cold 25.7°F (-3.5°C) in February to a cold 41°F (5°C). Weather in March »
Weather in April
April is a cool spring month in Dorchester, Iowa, with an average temperature varying between 54°F (12.2°C) and 36.3°F (2.4°C). Dorchester sees a rise in temperature during April, with average high-temperatures transitioning from a wintry 41°F (5°C) in March to a fresh 54°F (12.2°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in Dorchester, Iowa, with an average temperature ranging between max 65.8°F (18.8°C) and min 47.8°F (8.8°C). The start of May brings a rise in the average high-temperature, moving from a cool 54°F (12.2°C) in April to a comfortable 65.8°F (18.8°C). Weather in May »
Weather in June
June, the first month of the summer in Dorchester, is a moderately hot month, with an average temperature varying between 74.8°F (23.8°C) and 57.6°F (14.2°C). The arrival of June signals an increase in the average high-temperature, moving from an enjoyable 65.8°F (18.8°C) in May to a moderately hot 74.8°F (23.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Dorchester, Iowa, with temperature in the range of an average high of 79.3°F (26.3°C) and an average low of 61.3°F (16.3°C). Dorchester's warmest weather arrives in July, when temperatures average a high of 79.3°F (26.3°C) and a low of 61.3°F (16.3°C). Weather in July »
Weather in August
August, the last month of the summer in Dorchester, is another warm month, with temperature in the range of an average high of 77.9°F (25.5°C) and an average low of 58.6°F (14.8°C). The advent of August denotes an average high-temperature of a still moderately hot 77.9°F (25.5°C), subtly different from July's 79.3°F (26.3°C). Weather in August »
Weather in September
September, the first month of the autumn in Dorchester, is still a pleasant month, with an average temperature fluctuating between 71.1°F (21.7°C) and 51.3°F (10.7°C). September is marked by a subtle drop in average high-temperatures, transitioning from a moderately hot 77.9°F (25.5°C) in August to an agreeable 71.1°F (21.7°C). Weather in September »
Weather in October
October, the same as September, in Dorchester, Iowa, is a moderate autumn month, with an average temperature varying between 56.3°F (13.5°C) and 40.3°F (4.6°C). Witnessing a clear downswing, the average high-temperature during October drops from September's pleasant 71.1°F (21.7°C) to a refreshing 56.3°F (13.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is also an icy month in Dorchester, Iowa, with an average temperature ranging between min 28.9°F (-1.7°C) and max 41.9°F (5.5°C). November's arrival witnesses a distinct drop in the average high-temperature, receding from October's refreshing 56.3°F (13.5°C) to a wintry 41.9°F (5.5°C). Weather in November »
Weather in December
December, the first month of the winter in Dorchester, is still a freezing cold month, with an average temperature fluctuating between 27.9°F (-2.3°C) and 17.1°F (-8.3°C). As November transitions to December, the average high-temperature falls from a cold 41.9°F (5.5°C) to a subzero cold 27.9°F (-2.3°C). Weather in December »
Updated: Jul 27, 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 part of the year is the coldest?
January, with its high-temperature average of 21.7°F (-5.7°C) and a low-temperature average of 8.8°F (-12.9°C), is the coldest month.
What is the most humid month?
The most humid month is January, with an average relative humidity of 90%.
What is the driest month in Dorchester?
January is the month with the least rainfall. Rain falls for 3.3 days and accumulates 0.87" (22mm) of precipitation.
How much does it rain?
Throughout the year, there are 130.5 rainfall days, and 26.5" (673mm) of precipitation is accumulated.
When does it snow in Dorchester?
Months with snowfall are January through May, October through December.
How many days does it snow?
In Dorchester, during the entire year, snow falls for 51.4 days and aggregates up to 22.2" (564mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 3.4h of sunshine.
What are the months with the lowest UV index?
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the snowiest month?
The month with the most snowfall in Dorchester is February, when snow falls for 11.4 days and typically aggregates up to 5.71" (145mm) of snow.
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?
June is the month with the most rainfall. Rain falls for 18 days and accumulates 4.61" (117mm) of precipitation.
When it does not snow?
In Dorchester, snow does not fall in June through September.
When are the longest days?
With an average of 15h and 24min of daylight, June has the longest days of the year.
What is the warmest month?
July, with average temperatures reaching a high of 79.3°F (26.3°C) and a low of 61.3°F (16.3°C), is the warmest month.
What is the month with the highest UV index?
The month with the highest UV index is July, with an average maximum UV index of 6.
What month has the most sunshine?
With an average of 9.8h of sunshine, August has the most sunshine of the year.
What is the least humid month?
The least humid month is October, with an average relative humidity of 76%.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 0min of daylight.
Average temperature
Dorchester, IA
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (21.7°F).
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (8.8°F).
Average pressure
Dorchester, IA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.89"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Dorchester, IA
- Average wind speed in January:
9.3mph - Average wind speed in February:
9.2mph - Average wind speed in March:
9.1mph - Average wind speed in April:
9.6mph - Average wind speed in May:
8.2mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.4mph - Average wind speed in October:
8.8mph - Average wind speed in November:
9.3mph - Average wind speed in December:
8.9mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity
Dorchester, IA
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is October (76%).
Average rainfall
Dorchester, IA
- Average rainfall in January:
0.87" - Average rainfall in February:
1.02" - Average rainfall in March:
1.46" - Average rainfall in April:
2.8" - Average rainfall in May:
3.54" - Average rainfall in June:
4.61"
- Average rainfall in July:
2.95" - Average rainfall in August:
2.36" - Average rainfall in September:
2.2" - Average rainfall in October:
2.01" - Average rainfall in November:
1.22" - Average rainfall in December:
1.46"
The wettest month (with the highest rainfall) is June (4.61").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days
Dorchester, IA
- Average rainfall days in January:
3.3 days - Average rainfall days in February:
3 days - Average rainfall days in March:
9.3 days - Average rainfall days in April:
14.9 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
18 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
12.9 days - Average rainfall days in September:
12.1 days - Average rainfall days in October:
10.7 days - Average rainfall days in November:
7.5 days - Average rainfall days in December:
4.7 days
The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is February (3 days).
Average snowfall
Dorchester, IA
- Average snowfall in January:
4.49" - Average snowfall in February:
5.71" - Average snowfall in March:
2.72" - Average snowfall in April:
2.48" - Average snowfall in May:
0.2" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.71").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Dorchester, IA
- Average snowfall days in January:
12 days - Average snowfall days in February:
11.4 days - Average snowfall days in March:
7.4 days - Average snowfall days in April:
3.3 days - Average snowfall days in May:
0.3 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:
1.1 days - Average snowfall days in November:
4.8 days - Average snowfall days in December:
11.1 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Dorchester, IA
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
3h and 2min - Average sunshine in February:
3h and 3min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 2min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 1min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 1min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days
Dorchester, IA
- Average sunshine days in January:
17.7 days - Average sunshine days in February:
15.2 days - Average sunshine days in March:
15.6 days - Average sunshine days in April:
11.4 days - Average sunshine days in May:
11.2 days - Average sunshine days in June:
9.8 days
- Average sunshine days in July:
10.3 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
16.5 days
The month with the most sunshine days is January (17.7 days).
The month with the least sunshine days is June (9.8 days).
Average UV index
Dorchester, IA
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover
Dorchester, IA
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Dorchester, IA
The months with the highest visibility are April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, March, July, August, September and December (5mi).
Dorchester, Iowa, USA
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