Climate and monthly weather forecastGarrison, IA
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Garrison, Iowa, with an average temperature varying between 25.3°F (-3.7°C) and 13.1°F (-10.5°C). January, known for its average high temperature of 25.3°F (-3.7°C) and an average low temperature of 13.1°F (-10.5°C), is the coldest month. Weather in January »Weather in February
The last month of the winter, February, is also a subzero cold month in Garrison, Iowa, with an average temperature varying between 29.7°F (-1.3°C) and 16.3°F (-8.7°C). The onset of February brings an average high-temperature of a still freezing cold 29.7°F (-1.3°C), nearly matching the January temperature. Weather in February »Weather in March
March, the first month of the spring in Garrison, is a chilly month, with an average temperature fluctuating between 44.4°F (6.9°C) and 30.2°F (-1°C). As March begins, there is a noticeable increase in the average high-temperature, soaring from a subzero cold 29.7°F (-1.3°C) in February to a frosty 44.4°F (6.9°C). Weather in March »Weather in April
April in Garrison, Iowa, is a mild spring month, with temperature in the range of an average high of 57.4°F (14.1°C) and an average low of 40.8°F (4.9°C). The arrival of April brings a change in Garrison's weather, with average high-temperatures moving from March's frosty 44.4°F (6.9°C) to a refreshing 57.4°F (14.1°C). Weather in April »Weather in May
May, the last month of the spring in Garrison, is a pleasant month, with temperature in the range of an average low of 52.3°F (11.3°C) and an average high of 68.5°F (20.3°C). May sees a rise in the average high-temperature, climbing from a moderate 57.4°F (14.1°C) in April to an agreeable 68.5°F (20.3°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Garrison, Iowa, with an average temperature fluctuating between 61.5°F (16.4°C) and 77.7°F (25.4°C). With the transition into June, Garrison experiences an increase in average high-temperatures, moving up from a pleasant 68.5°F (20.3°C) in May to a warm 77.7°F (25.4°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Garrison, Iowa, with temperature in the range of an average low of 64.4°F (18°C) and an average high of 80.1°F (26.7°C). July, marked by an average high-temperature of 80.1°F (26.7°C) and a low-temperature of 64.4°F (18°C), is the warmest month. Weather in July »Weather in August
August, the last month of the summer in Garrison, is also a moderately hot month, with an average temperature fluctuating between 79°F (26.1°C) and 61.2°F (16.2°C). Garrison, Iowa, registers an average high-temperature of a still warm 79°F (26.1°C) with the arrival of August, showing minor deviation from the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Garrison, is also an agreeable month, with temperature in the range of an average low of 54.7°F (12.6°C) and an average high of 73.2°F (22.9°C). September brings a minor shift in the average high-temperature, adjusting from a moderately hot 79°F (26.1°C) in August to an agreeable 73.2°F (22.9°C). Weather in September »Weather in October
October, the same as September, in Garrison, Iowa, is another refreshing autumn month, with an average temperature ranging between min 43.5°F (6.4°C) and max 59.4°F (15.2°C). As October arrives, Garrison's weather displays a decrease in high-temperatures, transitioning from September's pleasant 73.2°F (22.9°C) to a moderate 59.4°F (15.2°C). Weather in October »Weather in November
November, the last month of the autumn in Garrison, is also a frosty month, with an average temperature ranging between min 31.5°F (-0.3°C) and max 45°F (7.2°C). Garrison's weather in November involves a decrease in the average high-temperature, moving down from October's mild 59.4°F (15.2°C) to a frosty 45°F (7.2°C). Weather in November »Weather in December
The first month of the winter, December, is also a wintry month in Garrison, Iowa, with an average temperature varying between 32.2°F (0.1°C) and 21.6°F (-5.8°C). The arrival of December corresponds with a temperature reduction, down from November's frosty 45°F (7.2°C) to a wintry 32.2°F (0.1°C). Weather in December »Updated: Feb 12, 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 Garrison, Iowa, the lowest temperatures are generally noted in January, averaging a high of 25.3°F (-3.7°C) and a low of 13.1°F (-10.5°C).
The most humid month in Garrison, Iowa, is January, with an average relative humidity of 86%.
In Garrison, during the entire year, the rain falls for 103.1 days and collects up to 10.63" (270mm) of precipitation.
Months with snowfall are January through April, October through December.
The month with the most snowfall in Garrison, Iowa, is January, when snow falls for 7.4 days and typically aggregates up to 1.73" (44mm) of snow.
In Garrison, Iowa, during the entire year, snow falls for 29.1 days and aggregates up to 4.92" (125mm) of snow.
With an average of 3.9h of sunshine, January has the least sunshine of the year in Garrison, Iowa.
The month with the least rainfall in Garrison is February, when the rain falls for 3.4 days and typically collects 0.39" (10mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Garrison, 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 in Garrison, Iowa. Rain falls for 13.3 days and accumulates 1.85" (47mm) of precipitation.
In Garrison, snow does not fall in May through September.
With an average of 15h and 12min of daylight, June has the longest days of the year.
The month with the highest UV index is June, with an average maximum UV index of 6.
Garrison's July weather, with an average high temperature of 80.1°F (26.7°C) and an average low temperature of 64.4°F (18°C), tends to be the warmest of the year.
July has the most sunshine of the year in Garrison, Iowa, with an average of 10h of sunshine.
The least humid month in Garrison, Iowa, is October, with an average relative humidity of 72%.
With an average of 9h and 12min of daylight, December has the shortest days of the year in Garrison, Iowa.
With an average maximum UV index of 1, December is the month with the lowest UV index in Garrison, Iowa.
Average temperature
Garrison, IA
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (25.3°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 (13.1°F).
Average pressure
Garrison, 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
Garrison, IA
- Average wind speed in January:
10.5mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.5mph - Average wind speed in April:
10.8mph - Average wind speed in May:
9.2mph - Average wind speed in June:
8mph
- Average wind speed in July:
7mph - Average wind speed in August:
7mph - Average wind speed in September:
8.1mph - Average wind speed in October:
9.7mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10mph
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 (7mph).
Average humidity
Garrison, IA
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Garrison, IA
- Average rainfall in January:
0.43" - Average rainfall in February:
0.39" - Average rainfall in March:
0.63" - Average rainfall in April:
1.06" - Average rainfall in May:
1.85" - Average rainfall in June:
1.34"
- Average rainfall in July:
1.38" - Average rainfall in August:
0.75" - Average rainfall in September:
1.06" - Average rainfall in October:
0.71" - Average rainfall in November:
0.59" - Average rainfall in December:
0.43"
The wettest month (with the highest rainfall) is May (1.85").
The driest month (with the least rainfall) is February (0.39").
Average rainfall days
Garrison, IA
- Average rainfall days in January:
3.5 days - Average rainfall days in February:
3.4 days - Average rainfall days in March:
8.6 days - Average rainfall days in April:
11 days - Average rainfall days in May:
13.3 days - Average rainfall days in June:
13.9 days
- Average rainfall days in July:
12 days - Average rainfall days in August:
10.1 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
5.5 days - Average rainfall days in December:
3.8 days
The month with the highest number of rainy days is June (13.9 days).
The month with the least rainy days is February (3.4 days).
Average snowfall
Garrison, IA
The month with the highest snowfall is January (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Garrison, IA
- Average snowfall days in January:
7.4 days - Average snowfall days in February:
7.8 days - Average snowfall days in March:
4.2 days - Average snowfall days in April:
1.2 days - Average snowfall days in May:
0 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:
0.7 days - Average snowfall days in November:
2.3 days - Average snowfall days in December:
5.5 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Garrison, 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:
3h and 54min - Average sunshine in February:
4h and 0min - 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 36min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 48min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 24min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Garrison, IA
- Average sunshine days in January:
21.8 days - Average sunshine days in February:
18.3 days - Average sunshine days in March:
19.3 days - Average sunshine days in April:
16.7 days - Average sunshine days in May:
14.5 days - Average sunshine days in June:
13.4 days
- Average sunshine days in July:
15.3 days - Average sunshine days in August:
18.2 days - Average sunshine days in September:
18.9 days - Average sunshine days in October:
20.8 days - Average sunshine days in November:
21.8 days - Average sunshine days in December:
21.9 days
The month with the most sunshine days is December (21.9 days).
The month with the least sunshine days is June (13.4 days).
Average UV index
Garrison, IA
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Garrison, IA
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility
Garrison, IA
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
