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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 Dedham, Iowa, is another subzero cold winter month, with temperature in the range of an average low of 13.6°F (-10.2°C) and an average high of 26.2°F (-3.2°C). Dedham's January weather, with an average high temperature of 26.2°F (-3.2°C) and an average low temperature of 13.6°F (-10.2°C), tends to be the coldest of the year. Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Dedham, Iowa, with an average temperature ranging between max 30.2°F (-1°C) and min 16.9°F (-8.4°C). The initiation of February sees an average high-temperature of a still subzero cold 30.2°F (-1°C), showing minor variations from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Dedham, is a chilly month, with an average temperature varying between 45.7°F (7.6°C) and 31.1°F (-0.5°C). A clear escalation in the average high-temperature marks the arrival of March, surging from a subzero cold 30.2°F (-1°C) in February to a chilly 45.7°F (7.6°C). Weather in March »
Weather in April
April is a mild spring month in Dedham, Iowa, with an average temperature varying between 41.9°F (5.5°C) and 58.5°F (14.7°C). April's arrival signals an increase in average high-temperatures, moving from March's frosty 45.7°F (7.6°C) to a moderate 58.5°F (14.7°C). Weather in April »
Weather in May
May, the last month of the spring in Dedham, is a pleasant month, with an average temperature varying between 69.1°F (20.6°C) and 52.9°F (11.6°C). A rise in the average high-temperature is observed during May, moving from a moderate 58.5°F (14.7°C) in April to a pleasant 69.1°F (20.6°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Dedham, Iowa, with an average temperature varying between 79.3°F (26.3°C) and 62.8°F (17.1°C). Entering June, Dedham sees a temperature rise, with the average high-temperature advancing from May's agreeable 69.1°F (20.6°C) to a warm 79.3°F (26.3°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Dedham, Iowa, with temperature in the range of an average high of 81.5°F (27.5°C) and an average low of 64.4°F (18°C). July is the month when Dedham sees the highest average temperatures, with a high of 81.5°F (27.5°C) and a low of 64.4°F (18°C). The heat index in July is appraised at a hot 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Dedham, is also a moderately hot month, with an average temperature fluctuating between 79.5°F (26.4°C) and 61.5°F (16.4°C). Dedham's entry into August measures an average high-temperature of a still moderately hot 79.5°F (26.4°C), closely parallel to the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Dedham, Iowa, with an average temperature ranging between max 74.7°F (23.7°C) and min 55.8°F (13.2°C). Stepping into September, Dedham records an average high-temperature of a still moderately hot 74.7°F (23.7°C), almost consistent with August. Weather in September »
Weather in October
October, like September, is a moderate autumn month in Dedham, Iowa, with an average temperature varying between 59.5°F (15.3°C) and 43.9°F (6.6°C). The shift from September to October brings a noticeable decrease in the average high-temperature, dropping from a warm 74.7°F (23.7°C) to a mild 59.5°F (15.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Dedham, is also a frosty month, with an average temperature fluctuating between 45.9°F (7.7°C) and 31.8°F (-0.1°C). The arrival of November corresponds with a shift in temperature, down from a refreshing 59.5°F (15.3°C) in October to a frosty 45.9°F (7.7°C). Weather in November »
Weather in December
December, the first month of the winter in Dedham, is still a freezing cold month, with an average temperature fluctuating between 31.8°F (-0.1°C) and 20.8°F (-6.2°C). A shift in Dedham's weather is observed as November turns into December, with the average high temperature reducing from a chilly 45.9°F (7.7°C) to a freezing cold 31.8°F (-0.1°C). Weather in December »
Updated: Jul 21, 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?
In Dedham, January is the month with the lowest recorded average temperatures, measuring a high of 26.2°F (-3.2°C) and a low of 13.6°F (-10.2°C).
What is the most humid month?
The most humid month is January, with an average relative humidity of 84%.
What is the driest month?
The month with the least rainfall in Dedham is January, when the rain falls for 4.6 days and typically collects 0.94" (24mm) of precipitation.
How much does it rain in Dedham?
Throughout the year, there are 130.1 rainfall days, and 27.28" (693mm) of precipitation is accumulated.
When does it snow in Dedham?
January through May, October through December are months with snowfall.
How many days does it snow?
Throughout the year, in Dedham, Iowa, there are 44.8 snowfall days, and 19.8" (503mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.2h of sunshine.
What is the snowiest month in Dedham?
February is the month with the most snowfall. Snow falls for 9.4 days and accumulates 5.12" (130mm) of snow.
What is the month with the lowest UV index?
February is the month with the lowest UV index, with an average maximum UV index of 1.
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 are the least humid months?
April and October, with an average relative humidity of 69%, are the least humid months.
What is the wettest month?
The month with the most rainfall is May, when the rain falls for 17.3 days and typically aggregates up to 4.29" (109mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
With an average of 15h and 12min of daylight, June has the longest days of the year.
What is the month with the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What month is the hottest?
July, with an average high of 81.5°F (27.5°C) and a low of 64.4°F (18°C), signifies the warmest month of the year.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.4h of sunshine.
What is the month with the shortest days in Dedham?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Dedham, IA
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (26.2°F).
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure
Dedham, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Dedham, IA
- Average wind speed in January:
11.1mph - Average wind speed in February:
10.9mph - Average wind speed in March:
10.7mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.5mph
- Average wind speed in July:
7.2mph - Average wind speed in August:
7.4mph - Average wind speed in September:
8.5mph - Average wind speed in October:
9.9mph - Average wind speed in November:
10.7mph - Average wind speed in December:
10.6mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity
Dedham, IA
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are April and October (69%).
Average rainfall
Dedham, IA
- Average rainfall in January:
0.94" - Average rainfall in February:
1.26" - Average rainfall in March:
1.73" - Average rainfall in April:
2.95" - Average rainfall in May:
4.29" - Average rainfall in June:
3.98"
- Average rainfall in July:
2.17" - Average rainfall in August:
2.32" - Average rainfall in September:
2.72" - Average rainfall in October:
2.13" - Average rainfall in November:
1.14" - Average rainfall in December:
1.65"
The wettest month (with the highest rainfall) is May (4.29").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days
Dedham, IA
- Average rainfall days in January:
4.6 days - Average rainfall days in February:
4.3 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
15.4 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
17.9 days
- Average rainfall days in July:
14 days - Average rainfall days in August:
12 days - Average rainfall days in September:
10.9 days - Average rainfall days in October:
9.9 days - Average rainfall days in November:
7.2 days - Average rainfall days in December:
5 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (4.3 days).
Average snowfall
Dedham, IA
- Average snowfall in January:
4.02" - Average snowfall in February:
5.12" - Average snowfall in March:
3.35" - Average snowfall in April:
1.26" - Average snowfall in May:
0.24" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Dedham, IA
- Average snowfall days in January:
11.8 days - Average snowfall days in February:
9.4 days - Average snowfall days in March:
7 days - Average snowfall days in April:
1.7 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:
0.9 days - Average snowfall days in November:
3.8 days - Average snowfall days in December:
9.9 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Dedham, IA
- Average daylight in January:
9h and 3min - 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 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 4min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Dedham, IA
- Average sunshine days in January:
16.1 days - Average sunshine days in February:
14.5 days - Average sunshine days in March:
14 days - Average sunshine days in April:
11.5 days - Average sunshine days in May:
11.7 days - Average sunshine days in June:
10 days
- Average sunshine days in July:
14.1 days - Average sunshine days in August:
15.9 days - Average sunshine days in September:
17.2 days - Average sunshine days in October:
18.8 days - Average sunshine days in November:
18.9 days - Average sunshine days in December:
17.4 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (10 days).
Average UV index
Dedham, IA
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover
Dedham, IA
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility
Dedham, IA
The months with the highest visibility are February, March, April, May, June, July, September, October, November and December (6mi).
The months with the lowest visibility are January and August (5mi).
Dedham, Iowa, USA
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