Climate and monthly weather forecastChelsea, IA
Climate and monthly weather forecast
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
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
The most humid month is January, with an average relative humidity of 85%.
January is the month with the least rainfall. Rain falls for 4.5 days and accumulates 1.18" (30mm) of precipitation.
Throughout the year, there are 139 rainfall days, and 29.49" (749mm) of precipitation is accumulated.
January through May, October through December are months with snowfall.
January is the month with the most snowfall. Snow falls for 9.6 days and accumulates 5.24" (133mm) of snow.
Throughout the year, there are 39 snowfall days, and 16.69" (424mm) of snow is accumulated.
January has the least sunshine of the year, with an average of 4h of sunshine.
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
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.
May is the month with the most rainfall. Rain falls for 18.1 days and accumulates 4.61" (117mm) of precipitation.
In Chelsea, snow does not fall in June through September.
June has the longest days of the year, with an average of 15h and 12min of daylight.
The month with the highest UV index is June, with an average maximum UV index of 6.
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).
The month with the most sunshine is July, with an average of 9.9h of sunshine.
October is the least humid month, with an average relative humidity of 72%.
With an average of 9h and 12min of daylight, December has the shortest days of the year.
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 in January:
30.14"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.89"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.11"Hg
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 in January:
10.7mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.8mph - Average wind speed in May:
9.2mph - Average wind speed in June:
8.1mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7mph - Average wind speed in September:
8.1mph - Average wind speed in October:
9.8mph - Average wind speed in November:
10.5mph - Average wind speed in December:
10.1mph
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
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 in January:
1.18" - Average rainfall in February:
1.26" - Average rainfall in March:
1.89" - Average rainfall in April:
3.23" - Average rainfall in May:
4.61" - Average rainfall in June:
4.13"
- Average rainfall in July:
3.19" - Average rainfall in August:
2.24" - Average rainfall in September:
2.52" - Average rainfall in October:
2.17" - Average rainfall in November:
1.57" - Average rainfall in December:
1.5"
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 in January:
4.5 days - Average rainfall days in February:
4.6 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
14.5 days - Average rainfall days in May:
18.1 days - Average rainfall days in June:
19.3 days
- Average rainfall days in July:
17.2 days - Average rainfall days in August:
13.3 days - Average rainfall days in September:
11.9 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
8.3 days - Average rainfall days in December:
6.4 days
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
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 in January:
9.6 days - Average snowfall days in February:
10.6 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
1.4 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:
0.6 days - Average snowfall days in November:
2.8 days - Average snowfall days in December:
8.5 days
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 in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
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 0min - Average sunshine in February:
4h and 6min - Average sunshine in March:
6h and 6min - Average sunshine in April:
7h and 36min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 24min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 42min - Average sunshine in September:
9h and 12min - Average sunshine in October:
5h and 18min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 24min
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 in January:
18.2 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
15.2 days - Average sunshine days in April:
13.4 days - Average sunshine days in May:
10.6 days - Average sunshine days in June:
8.4 days
- Average sunshine days in July:
10.1 days - Average sunshine days in August:
15.1 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
19.2 days - Average sunshine days in November:
18.3 days - Average sunshine days in December:
18.2 days
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
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 cloud cover
Chelsea, IA
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
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).
