Climate and monthly weather forecast
Chelsea, IA

Share

Weather in January

January, like December, is a freezing cold winter month in Chelsea, Iowa, with an average temperature ranging between min 13.5°F (-10.3°C) and max 25.9°F (-3.4°C). Chelsea's January weather, with an average high temperature of 25.9°F (-3.4°C) and an average low temperature of 13.5°F (-10.3°C), tends to be the coldest of the year. Weather in January »

Weather in February

February, the last month of the winter in Chelsea, is another freezing cold month, with an average temperature fluctuating between 30.2°F (-1°C) and 17.1°F (-8.3°C). February observes an average high-temperature of a still subzero cold 30.2°F (-1°C), marking an insignificant difference from January's 25.9°F (-3.4°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Chelsea, Iowa, with temperature in the range of an average high of 45.1°F (7.3°C) and an average low of 30.6°F (-0.8°C). The onset of March witnesses a clear shift in the average high-temperature, escalating from a freezing cold 30.2°F (-1°C) in February to a chilly 45.1°F (7.3°C). Weather in March »

Weather in April

April in Chelsea, Iowa, is a mild spring month, with an average temperature varying between 41.4°F (5.2°C) and 57.7°F (14.3°C). With the arrival of April, the average high-temperature transitions from a chilly 45.1°F (7.3°C) in March to a mild 57.7°F (14.3°C). Weather in April »

Weather in May

May, the last month of the spring in Chelsea, is an agreeable month, with an average temperature ranging between min 52.2°F (11.2°C) and max 68.7°F (20.4°C). Chelsea's May weather shows an increase in high-temperatures, moving from April's moderate 57.7°F (14.3°C) to a pleasant 68.7°F (20.4°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Chelsea, Iowa, with an average temperature fluctuating between 61.7°F (16.5°C) and 78.1°F (25.6°C). As June arrives, a rise in the average high-temperature is observed, moving from a pleasant 68.7°F (20.4°C) in May to a warm 78.1°F (25.6°C). Weather in June »

Weather in July

July, like June, in Chelsea, Iowa, is a moderately hot summer month, with an average temperature fluctuating between 64.4°F (18°C) and 80.8°F (27.1°C). July stands out as Chelsea's warmest month, with an average high-temperature of 80.8°F (27.1°C) and a low-temperature of 64.4°F (18°C). For most parts of July, the heat index is estimated at a hot 86°F (30°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Chelsea, Iowa, with an average temperature varying between 79.5°F (26.4°C) and 61.9°F (16.6°C). Chelsea, Iowa, experiences a subtle adjustment in high-temperatures to a still moderately hot 79.5°F (26.4°C) with the onset of August, maintaining near parity with July's 80.8°F (27.1°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Chelsea, Iowa, with an average temperature ranging between max 74.3°F (23.5°C) and min 55°F (12.8°C). The transition from August to September sees an average high-temperature of a still warm 74.3°F (23.5°C), indicating a minor variance from the prior month. Weather in September »

Weather in October

October, like September, is another refreshing autumn month in Chelsea, Iowa, with temperature in the range of an average high of 59.9°F (15.5°C) and an average low of 44.1°F (6.7°C). In Chelsea, stepping into October signifies a significant temperature decrement, moving down from September's moderately hot 74.3°F (23.5°C) to a mild 59.9°F (15.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Chelsea, Iowa, with an average temperature ranging between min 32.2°F (0.1°C) and max 45.1°F (7.3°C). With the onset of November, Chelsea's weather experiences a distinct temperature drop, moving from a mild 59.9°F (15.5°C) in October to a frosty 45.1°F (7.3°C). Weather in November »

Weather in December

December, the first month of the winter in Chelsea, is still a cold month, with an average temperature ranging between max 32.7°F (0.4°C) and min 21.7°F (-5.7°C). Observing a mild shift, the average high-temperature during December reduces from November's chilly 45.1°F (7.3°C) to an icy 32.7°F (0.4°C). Weather in December »
Updated: Aug 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

January stands out as Chelsea's coldest month, with an average high-temperature of 25.9°F (-3.4°C) and a low-temperature of 13.5°F (-10.3°C).

What is the most humid month in Chelsea?

The most humid month is January, with an average relative humidity of 85%.

What is the driest month?

January is the month with the least rainfall. Rain falls for 4.5 days and accumulates 1.18" (30mm) of precipitation.

How much does it rain?

Throughout the year, there are 139 rainfall days, and 29.49" (749mm) of precipitation is accumulated.

When does it snow?

January through May, October through December are months with snowfall.

What is the snowiest month?

January is the month with the most snowfall. Snow falls for 9.6 days and accumulates 5.24" (133mm) of snow.

How many days does it snow?

Throughout the year, there are 39 snowfall days, and 16.69" (424mm) of snow is accumulated.

What is the month with the least sunshine?

January has the least sunshine of the year, with an average of 4h of sunshine.

When is the lowest UV index?

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

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?

May is the month with the most rainfall. Rain falls for 18.1 days and accumulates 4.61" (117mm) of precipitation.

When it does not snow?

In Chelsea, snow does not fall in June through September.

When are the longest days?

June has the longest days of the year, with an average of 15h and 12min of daylight.

What is the month with the highest UV index?

The month with the highest UV index is June, with an average maximum UV index of 6.

What is the hottest time of year?

The warmest period tends to be July, when average temperatures fluctuate between a high of 80.8°F (27.1°C) and a low of 64.4°F (18°C).

What month has the most sunshine?

The month with the most sunshine is July, with an average of 9.9h of sunshine.

What is the least humid month?

October is the least humid month, with an average relative humidity of 72%.

What is the month with the shortest days?

With an average of 9h and 12min of daylight, December has the shortest days of the year.

Average temperature
Chelsea, IA

Average temperature - Chelsea, IA

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (25.9°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 (13.5°F).

Average pressure
Chelsea, IA

Average pressure - Chelsea, IA

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed
Chelsea, IA

Average wind speed - Chelsea, IA

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).

Average humidity
Chelsea, IA

Average humidity - Chelsea, IA

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (72%).

Average rainfall
Chelsea, IA

Average rainfall - Chelsea, IA

The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is January (1.18").

Average rainfall days
Chelsea, IA

Average rainfall days - Chelsea, IA

The month with the highest number of rainy days is June (19.3 days).
The month with the least rainy days is January (4.5 days).

Average snowfall
Chelsea, IA

Average snowfall - Chelsea, IA

The month with the highest snowfall is January (5.24").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Chelsea, IA

Average snowfall days - Chelsea, IA

The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Chelsea, IA

Average daylight / Average sunshine - Chelsea, IA

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).

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days
Chelsea, IA

Average sunshine days - Chelsea, IA

The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is June (8.4 days).

Average UV index
Chelsea, IA

Average UV index - Chelsea, IA

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

Average visibility
Chelsea, IA

Average visibility - Chelsea, IA

The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).

Chelsea, Iowa, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location