Waterloo
Iowa, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Waterloo, IA

January, the same as December, in Waterloo, Iowa, is another subzero cold winter month, with average temperature varying between 12°F (-11.1°C) and 24.3°F (-4.3°C). The coldest month is January, with an average high-temperature of 24.3°F (-4.3°C) and an average low-temperature of 12°F (-11.1°C). Weather in January »

February, the last month of the winter, in Waterloo, is also a subzero cold month, with temperature in the range of an average low of 15.4°F (-9.2°C) and an average high of 28.4°F (-2°C). In February, the average high-temperature is relatively the same as in January - a still freezing cold 28.4°F (-2°C). Weather in February »

March, the first month of the spring, in Waterloo, is a frosty month, with average temperature fluctuating between 29.7°F (-1.3°C) and 44.1°F (6.7°C). In Waterloo, the average high-temperature in March increases considerably, from a subzero cold 28.4°F (-2°C) in February, to a chilly 44.1°F (6.7°C). Weather in March »

April is a mild spring month in Waterloo, Iowa, with average temperature ranging between min 40.1°F (4.5°C) and max 56.8°F (13.8°C). In April, the average high-temperature rises, from a frosty 44.1°F (6.7°C) in March, to a mild 56.8°F (13.8°C). Weather in April »

May, the last month of the spring, in Waterloo, is an agreeable month, with average temperature fluctuating between 51.6°F (10.9°C) and 68.2°F (20.1°C). In Waterloo, the average high-temperature in May increases, from a mild 56.8°F (13.8°C) in April, to an agreeable 68.2°F (20.1°C). Weather in May »

June, the first month of the summer, in Waterloo, is a moderately hot month, with average temperature varying between 77.7°F (25.4°C) and 61.3°F (16.3°C). In Waterloo, the average high-temperature in June increases, from an agreeable 68.2°F (20.1°C) in May, to a moderately hot 77.7°F (25.4°C). Weather in June »

July, like June, in Waterloo, Iowa, is another warm summer month, with average temperature varying between 80.1°F (26.7°C) and 63.1°F (17.3°C). The warmest month is July, with an average high-temperature of 80.1°F (26.7°C) and an average low-temperature of 63.1°F (17.3°C). Weather in July »

August, the last month of the summer, in Waterloo, is another warm month, with average temperature varying between 78.6°F (25.9°C) and 61°F (16.1°C). In August, the average high-temperature is essentially the same as in July - a still warm 78.6°F (25.9°C). Weather in August »

September, the first month of the autumn, in Waterloo, is also an agreeable month, with average temperature varying between 54.5°F (12.5°C) and 73.2°F (22.9°C). In September, the average high-temperature marginally drops, from a warm 78.6°F (25.9°C) in August, to an agreeable 73.2°F (22.9°C). Weather in September »

October, like September, is another mild autumn month in Waterloo, Iowa, with temperature in the range of an average high of 58.5°F (14.7°C) and an average low of 43.5°F (6.4°C). In Waterloo, the average high-temperature in October significantly decreases, from an agreeable 73.2°F (22.9°C) in September, to a moderate 58.5°F (14.7°C). Weather in October »

November, the last month of the autumn, in Waterloo, is another chilly month, with average temperature ranging between max 44.1°F (6.7°C) and min 31.1°F (-0.5°C). In November, the average high-temperature drops, from a mild 58.5°F (14.7°C) in October, to a frosty 44.1°F (6.7°C). Weather in November »

The first month of the winter, December, is also a subzero cold month in Waterloo, Iowa, with temperature in the range of an average high of 31.1°F (-0.5°C) and an average low of 20.5°F (-6.4°C). In Waterloo, the average high-temperature in December decreases, from a frosty 44.1°F (6.7°C) in November, to a freezing cold 31.1°F (-0.5°C). Weather in December »

What is the coldest month in Waterloo?

The coldest month in Waterloo is January, with an average high-temperature of 24.3°F (-4.3°C) and an average low-temperature of 12°F (-11.1°C).

What is the most humid month in Waterloo?

The most humid month is January, with an average relative humidity of 87%.

How much does it rain in Waterloo?

Throughout the year, there are 133.6 rainfall days, and 28.27" (718mm) of precipitation is accumulated.

What is the driest month in Waterloo?

Months with the least rainfall in Waterloo are January and February Rain falls for 4.1 days and accumulates 1.02" (26mm) of rain.

When does it snow in Waterloo?

Months with snowfall in Waterloo are January through May, October through December.

How many days does it snow in Waterloo?

In Waterloo, Iowa, during the entire year, snow falls for 41.6 days, and aggregates up to 15.24" (387mm) of snow.

When does it snow the most in Waterloo?

January is the month with the most snowfall. Snow falls for 11.5 days and accumulates 4.21" (107mm) of snow.

What is the month with the least sunshine in Waterloo?

The month with the least sunshine is January, with an average of 3.8h of sunshine.

What is the wettest month in Waterloo?

June is the month with the most rainfall. Rain falls for 18.1 days and accumulates 4.29" (109mm) of precipitation.

When it does not snow in Waterloo?

In Waterloo snow does not fall in June through September.

When are the longest days in Waterloo?

With an average of 15.3h of daylight, June has the longest days of the year in Waterloo.

What is the month with the highest UV index in Waterloo?

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

What is the warmest month in Waterloo?

July is the warmest month, with an average high-temperature of 80.1°F (26.7°C) and an average low-temperature of 63.1°F (17.3°C).

What month has the most sunshine in Waterloo?

With an average of 9.9h of sunshine, July has the most sunshine of the year.

What is the least humid month in Waterloo?

With an average relative humidity of 72%, October is the least humid month in Waterloo, Iowa.

What is the month with the shortest days in Waterloo?

The month with the shortest days is December, with an average of 9.1h of daylight.

What is the month with the lowest UV index in Waterloo?

December is the month with the lowest UV index in Waterloo, Iowa, with an average maximum UV index of 1.
Average temperature - Waterloo, IA
Average rainfall - Waterloo, IA

The wettest month (with the highest rainfall) is June (4.29").
The driest months (with the least rainfall) are January and February (1.02").

Average rainfall days - Waterloo, IA

The month with the highest number of rainy days is June (18.1 days).
The month with the least rainy days is February (4 days).

Average snowfall - Waterloo, IA
Average snowfall days - Waterloo, IA

The month with the highest number of snowfall days is January (11.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Waterloo, IA

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

The month with the most sunshine is July (Average sunshine: 9.9h).
The month with the least sunshine is January (Average sunshine: 3.8h).