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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, like December, is another subzero cold winter month in Cromwell, Iowa, with temperature in the range of an average low of 15.8°F (-9°C) and an average high of 29.1°F (-1.6°C). January, recording an average high temperature of 29.1°F (-1.6°C) and a low temperature of 15.8°F (-9°C), is Cromwell's coldest month. Weather in January »
Weather in February
February, the last month of the winter in Cromwell, is a cold month, with temperature in the range of an average low of 18.9°F (-7.3°C) and an average high of 33.3°F (0.7°C). The initiation of February records an average high-temperature of a wintry 33.3°F (0.7°C), displaying a near consistency with the previous month. Weather in February »
Weather in March
March, the first month of the spring in Cromwell, is a chilly month, with an average temperature varying between 32.5°F (0.3°C) and 48.2°F (9°C). A clear escalation in the average high-temperature marks the arrival of March, surging from an icy 33.3°F (0.7°C) in February to a frosty 48.2°F (9°C). Weather in March »
Weather in April
April is a moderate spring month in Cromwell, Iowa, with an average temperature varying between 42.3°F (5.7°C) and 59.7°F (15.4°C). The arrival of April brings a change in Cromwell's weather, with average high-temperatures moving from March's chilly 48.2°F (9°C) to a moderate 59.7°F (15.4°C). Weather in April »
Weather in May
May, the last month of the spring in Cromwell, is an agreeable month, with an average temperature varying between 69.3°F (20.7°C) and 52.7°F (11.5°C). An upsurge in temperatures occurs as April gives way to May, with average highs shifting from a moderate 59.7°F (15.4°C) to a pleasant 69.3°F (20.7°C). Weather in May »
Weather in June
June, the first month of the summer in Cromwell, is a moderately hot month, with an average temperature fluctuating between 79.5°F (26.4°C) and 63.1°F (17.3°C). June sees a rise in the average high-temperature, climbing from an agreeable 69.3°F (20.7°C) in May to a moderately hot 79.5°F (26.4°C). Weather in June »
Weather in July
July, like June, in Cromwell, Iowa, is a moderately hot summer month, with temperature in the range of an average high of 82.9°F (28.3°C) and an average low of 65.8°F (18.8°C). Cromwell's warmest month, July, generally records average temperatures ranging from a high of 82.9°F (28.3°C) to a low of 65.8°F (18.8°C). The heat index in July is estimated at a hot 91.4°F (33°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Cromwell, Iowa, with temperature in the range of an average high of 81°F (27.2°C) and an average low of 63°F (17.2°C). Cromwell's average high-temperature in August sits at a still warm 81°F (27.2°C), showing little difference from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Cromwell, is still a warm month, with an average temperature ranging between max 75°F (23.9°C) and min 56.1°F (13.4°C). September brings a minor shift in the average high-temperature, adjusting from a warm 81°F (27.2°C) in August to a still moderately hot 75°F (23.9°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Cromwell, Iowa, with an average temperature varying between 44.1°F (6.7°C) and 60.6°F (15.9°C). As October begins, there is a decrease in the average high-temperature, falling from a moderately hot 75°F (23.9°C) in September to a refreshing 60.6°F (15.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Cromwell, Iowa, with an average temperature varying between 47.3°F (8.5°C) and 32.5°F (0.3°C). Cromwell's progression into November includes a drop in the average high-temperature, from a moderate 60.6°F (15.9°C) in October to a chilly 47.3°F (8.5°C). Weather in November »
Weather in December
December, the first month of the winter in Cromwell, is also an icy month, with an average temperature fluctuating between 22.3°F (-5.4°C) and 34.3°F (1.3°C). December's arrival correlates with a reduction in the average high-temperature, down from a chilly 47.3°F (8.5°C) in November to a wintry 34.3°F (1.3°C). Weather in December »
Updated: Jun 14, 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 are the coldest months?
In Cromwell, the average lowest temperatures are observed in January, with a high of 29.1°F (-1.6°C) and a low of 15.8°F (-9°C).
What is the most humid month?
The months with the highest humidity in Cromwell are January and June, with an average relative humidity of 82%.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 3.7 days and typically collects 0.75" (19mm) of precipitation.
How much does it rain?
In Cromwell, during the entire year, the rain falls for 127.7 days and collects up to 23.39" (594mm) of precipitation.
When does it snow?
Months with snowfall are January through May, October through December.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 8.7 days and typically aggregates up to 3.15" (80mm) of snow.
How many days does it snow?
Throughout the year, there are 32.6 snowfall days, and 12.01" (305mm) of snow is accumulated.
What is the month with the least sunshine in Cromwell?
January has the least sunshine of the year in Cromwell, with an average of 4.4h of sunshine.
When is the lowest UV index?
The month with the lowest UV index in Cromwell is January, 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 is the wettest month?
The month with the most rainfall is June, when the rain falls for 17 days and typically aggregates up to 4.17" (106mm) of precipitation.
When it does not snow?
In Cromwell, snow does not fall in June through September.
When are the longest days?
With an average of 15h and 6min of daylight, June has the longest days of the year.
When is the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What are the warmest months?
During the warmest month in Cromwell, July, temperatures average a high of 82.9°F (28.3°C) and a low of 65.8°F (18.8°C).
What month has the most sunshine?
With an average of 10.1h of sunshine, July has the most sunshine of the year.
What is the least humid month?
October is the least humid month, with an average relative humidity of 71%.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 18min of daylight.
Average temperature
Cromwell, IA
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (29.1°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure
Cromwell, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.92"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:
30.01"Hg - Average pressure in November:
30.09"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 (29.88"Hg).
Average wind speed
Cromwell, IA
- Average wind speed in January:
10.7mph - Average wind speed in February:
10.7mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.5mph - Average wind speed in May:
8.9mph - Average wind speed in June:
8.2mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7.1mph - Average wind speed in September:
8.2mph - Average wind speed in October:
9.7mph - Average wind speed in November:
10.6mph - Average wind speed in December:
10.3mph
The windiest months (with the highest average wind speed) are January and February (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity
Cromwell, IA
The months with the highest relative humidity are January and June (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Cromwell, IA
- Average rainfall in January:
0.75" - Average rainfall in February:
0.79" - Average rainfall in March:
1.42" - Average rainfall in April:
2.13" - Average rainfall in May:
3.62" - Average rainfall in June:
4.17"
- Average rainfall in July:
2.32" - Average rainfall in August:
2.44" - Average rainfall in September:
2.2" - Average rainfall in October:
1.69" - Average rainfall in November:
1.06" - Average rainfall in December:
0.79"
The wettest month (with the highest rainfall) is June (4.17").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days
Cromwell, IA
- Average rainfall days in January:
3.7 days - Average rainfall days in February:
4.3 days - Average rainfall days in March:
10.3 days - Average rainfall days in April:
13.1 days - Average rainfall days in May:
17.4 days - Average rainfall days in June:
17 days
- Average rainfall days in July:
14.8 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
11.6 days - Average rainfall days in October:
9.2 days - Average rainfall days in November:
7.5 days - Average rainfall days in December:
5 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (3.7 days).
Average snowfall
Cromwell, IA
- Average snowfall in January:
3.15" - Average snowfall in February:
2.83" - Average snowfall in March:
1.69" - Average snowfall in April:
1.18" - Average snowfall in May:
0.31" - Average snowfall in June:
0"
The month with the highest snowfall is January (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Cromwell, IA
- Average snowfall days in January:
8.7 days - Average snowfall days in February:
8 days - Average snowfall days in March:
4.6 days - Average snowfall days in April:
1.6 days - Average snowfall days in May:
0.2 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:
0.8 days - Average snowfall days in November:
2.2 days - Average snowfall days in December:
6.5 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Cromwell, IA
- Average daylight in January:
9h and 4min - 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 3min - 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 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 2min - 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 2min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
10h and 1min - 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 6min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Cromwell, IA
- Average sunshine days in January:
18.3 days - Average sunshine days in February:
16.6 days - Average sunshine days in March:
15.8 days - Average sunshine days in April:
13.9 days - Average sunshine days in May:
10.7 days - Average sunshine days in June:
10.9 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
16.3 days - Average sunshine days in October:
19.7 days - Average sunshine days in November:
20.2 days - Average sunshine days in December:
19.4 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (10.7 days).
Average UV index
Cromwell, IA
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Cromwell, IA
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are July and September (Cloud cover 30).
Average visibility
Cromwell, IA
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).
Cromwell, Iowa, USA
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