Climate and monthly weather forecastCoster, IA
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Coster, Iowa, with temperature in the range of an average low of 11.8°F (-11.2°C) and an average high of 24.1°F (-4.4°C). January, noted for its average high-temperature of 24.1°F (-4.4°C) and an average low-temperature of 11.8°F (-11.2°C), is considered the coldest month. Weather in January »Weather in February
February, the last month of the winter in Coster, is another freezing cold month, with an average temperature fluctuating between 15.1°F (-9.4°C) and 28.2°F (-2.1°C). The onset of February brings an average high-temperature of a still subzero cold 28.2°F (-2.1°C), nearly matching the January temperature. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Coster, Iowa, with temperature in the range of an average low of 29.5°F (-1.4°C) and an average high of 43.3°F (6.3°C). The transition from February to March brings a clear temperature rise, with average high-temperatures increasing from a freezing cold 28.2°F (-2.1°C) to a chilly 43.3°F (6.3°C). Weather in March »Weather in April
April is a refreshing spring month in Coster, Iowa, with an average temperature ranging between max 56.3°F (13.5°C) and min 39.9°F (4.4°C). As April begins, there is an increase in the average high-temperature, moving from a frosty 43.3°F (6.3°C) in March to a mild 56.3°F (13.5°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Coster, Iowa, with temperature in the range of an average high of 68.2°F (20.1°C) and an average low of 51.8°F (11°C). May's arrival brings a temperature shift, moving from a moderate 56.3°F (13.5°C) in April to a pleasant 68.2°F (20.1°C). Weather in May »Weather in June
June, the first month of the summer in Coster, is a moderately hot month, with temperature in the range of an average low of 61.3°F (16.3°C) and an average high of 77.5°F (25.3°C). Coster experiences a temperature shift with the start of June, with average high-temperatures moving from an agreeable 68.2°F (20.1°C) in May to a warm 77.5°F (25.3°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Coster, Iowa, with an average temperature varying between 79.9°F (26.6°C) and 63.3°F (17.4°C). The average temperatures reach their apex in July, averaging 79.9°F (26.6°C) at the high end and 63.3°F (17.4°C) at the low end. Weather in July »Weather in August
August, the last month of the summer in Coster, is also a moderately hot month, with temperature in the range of an average high of 78.4°F (25.8°C) and an average low of 60.6°F (15.9°C). Coster observes a minor difference in average high-temperatures between July's 79.9°F (26.6°C) and August's 78.4°F (25.8°C). Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Coster, Iowa, with an average temperature varying between 73.2°F (22.9°C) and 54.3°F (12.4°C). The transition into September marks the average high-temperature at an agreeable 73.2°F (22.9°C), differing minimally from August's 78.4°F (25.8°C). Weather in September »Weather in October
October, the same as September, in Coster, Iowa, is another mild autumn month, with temperature in the range of an average low of 43.2°F (6.2°C) and an average high of 58.3°F (14.6°C). The arrival of October is marked by a notable decrease in high-temperatures, falling from an agreeable 73.2°F (22.9°C) in September to a mild 58.3°F (14.6°C). Weather in October »Weather in November
November, the last month of the autumn in Coster, is also a frosty month, with an average temperature fluctuating between 43.9°F (6.6°C) and 31.1°F (-0.5°C). As November sets, the average high-temperature displays a significant decrease, moving down from a mild 58.3°F (14.6°C) in October to a chilly 43.9°F (6.6°C). Weather in November »Weather in December
December, the first month of the winter in Coster, is still a freezing cold month, with temperature in the range of an average high of 30.6°F (-0.8°C) and an average low of 19.9°F (-6.7°C). December brings a decrease in the average high-temperature, falling from November's frosty 43.9°F (6.6°C) to a subzero cold 30.6°F (-0.8°C). Weather in December »Updated: Jul 19, 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
In Coster, the average lowest temperatures are observed in January, with a high of 24.1°F (-4.4°C) and a low of 11.8°F (-11.2°C).
The most humid month is January, with an average relative humidity of 87%.
January is the month with the least rainfall. Rain falls for 5.1 days and accumulates 1.14" (29mm) of precipitation.
In Coster, during the entire year, the rain falls for 148.3 days and collects up to 31.02" (788mm) of precipitation.
January through May, October through December are months with snowfall.
In Coster, during the entire year, snow falls for 53.2 days and aggregates up to 22.4" (569mm) of snow.
With an average of 3.8h of sunshine, January has the least sunshine of the year.
The month with the lowest UV index is January, with an average maximum UV index of 1.
February is the month with the most snowfall in Coster. Snow falls for 11.8 days and accumulates 5.51" (140mm) of snow.
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.
June is the month with the most rainfall. Rain falls for 20.1 days and accumulates 4.76" (121mm) of precipitation.
In Coster, snow does not fall in June through September.
June has the longest days of the year, with an average of 15h and 18min of daylight.
June is the month with the highest UV index, with an average maximum UV index of 6.
In Coster, the peak average temperatures are observed in July, with a high of 79.9°F (26.6°C) and a low of 63.3°F (17.4°C).
July has the most sunshine of the year, with an average of 9.9h of sunshine.
October is the least humid month, with an average relative humidity of 71%.
December has the shortest days of the year, with an average of 9h and 6min of daylight.
Average temperature
Coster, IA
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (24.1°F).
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (11.8°F).
Average pressure
Coster, IA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.89"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.11"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Coster, IA
- Average wind speed in January:
10.7mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.8mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.3mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7.1mph - Average wind speed in September:
8.3mph - Average wind speed in October:
9.9mph - Average wind speed in November:
10.5mph - Average wind speed in December:
10.3mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity
Coster, IA
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Coster, IA
- Average rainfall in January:
1.14" - Average rainfall in February:
1.3" - Average rainfall in March:
1.85" - Average rainfall in April:
3.43" - Average rainfall in May:
4.69" - Average rainfall in June:
4.76"
- Average rainfall in July:
3.07" - Average rainfall in August:
2.44" - Average rainfall in September:
2.56" - Average rainfall in October:
2.68" - Average rainfall in November:
1.46" - Average rainfall in December:
1.65"
The wettest month (with the highest rainfall) is June (4.76").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days
Coster, IA
- Average rainfall days in January:
5.1 days - Average rainfall days in February:
4.9 days - Average rainfall days in March:
11.2 days - Average rainfall days in April:
15.9 days - Average rainfall days in May:
19 days - Average rainfall days in June:
20.1 days
- Average rainfall days in July:
18.3 days - Average rainfall days in August:
14.5 days - Average rainfall days in September:
12.9 days - Average rainfall days in October:
11.2 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
6.4 days
The month with the highest number of rainy days is June (20.1 days).
The month with the least rainy days is February (4.9 days).
Average snowfall
Coster, IA
- Average snowfall in January:
5.31" - Average snowfall in February:
5.51" - Average snowfall in March:
2.76" - Average snowfall in April:
2.01" - Average snowfall in May:
0.35" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Coster, IA
- Average snowfall days in January:
13.5 days - Average snowfall days in February:
11.8 days - Average snowfall days in March:
7.3 days - Average snowfall days in April:
2.3 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:
1.3 days - Average snowfall days in November:
4.3 days - Average snowfall days in December:
12.5 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Coster, 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 18min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
3h and 48min - Average sunshine in February:
4h and 12min - 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 30min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 48min - Average sunshine in September:
9h and 12min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 18min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Coster, IA
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
12.3 days - Average sunshine days in March:
13.1 days - Average sunshine days in April:
11.1 days - Average sunshine days in May:
9.5 days - Average sunshine days in June:
7.8 days
- Average sunshine days in July:
8.8 days - Average sunshine days in August:
12.9 days - Average sunshine days in September:
14.6 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
17.4 days - Average sunshine days in December:
15.8 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is June (7.8 days).
Average UV index
Coster, IA
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Coster, IA
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility
Coster, IA
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
