Climate and monthly weather forecast
River Junction, IA

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Weather in January

January, the same as December, in River Junction, Iowa, is a freezing cold winter month, with temperature in the range of an average low of 15.3°F (-9.3°C) and an average high of 27.3°F (-2.6°C). January stands out as River Junction's coldest month, with temperatures ranging between an average high of 27.3°F (-2.6°C) and a low of 15.3°F (-9.3°C). Weather in January »

Weather in February

February, the last month of the winter in River Junction, is a wintry month, with an average temperature varying between 19°F (-7.2°C) and 32°F (0°C). Transitioning into February, River Junction records an average high-temperature of a cold 32°F (0°C), almost identical to January's 27.3°F (-2.6°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in River Junction, Iowa, with an average temperature ranging between max 46.6°F (8.1°C) and min 31.6°F (-0.2°C). March marks a distinct rise in the average high-temperature, ascending from February's cold 32°F (0°C) to a chilly 46.6°F (8.1°C). Weather in March »

Weather in April

April is a mild spring month in River Junction, Iowa, with temperature in the range of an average low of 42.3°F (5.7°C) and an average high of 58.6°F (14.8°C). April sees a rise in the average high-temperature, climbing from a chilly 46.6°F (8.1°C) in March to a refreshing 58.6°F (14.8°C). Weather in April »

Weather in May

May, the last month of the spring in River Junction, is an agreeable month, with an average temperature fluctuating between 69.8°F (21°C) and 53.2°F (11.8°C). The arrival of May brings a change in River Junction's weather, with average high-temperatures moving from April's mild 58.6°F (14.8°C) to a pleasant 69.8°F (21°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in River Junction, Iowa, with temperature in the range of an average high of 79.2°F (26.2°C) and an average low of 62.1°F (16.7°C). With the transition into June, River Junction experiences an increase in average high-temperatures, moving up from an agreeable 69.8°F (21°C) in May to a warm 79.2°F (26.2°C). Weather in June »

Weather in July

July, like June, in River Junction, Iowa, is another warm summer month, with an average temperature ranging between min 64.6°F (18.1°C) and max 81.5°F (27.5°C). With average high and low temperatures of 81.5°F (27.5°C) and 64.6°F (18.1°C) respectively, July is River Junction's warmest month. The heat index value during July is computed to be a tropical 87.8°F (31°C). Weather in July »

Weather in August

August, the last month of the summer in River Junction, is another warm month, with temperature in the range of an average high of 80.6°F (27°C) and an average low of 62.2°F (16.8°C). During August, River Junction observes a subtle ascent to a still moderately hot 80.6°F (27°C) from July's 81.5°F (27.5°C) in the average high-temperature. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in River Junction, Iowa, with an average temperature varying between 55.8°F (13.2°C) and 75.2°F (24°C). September signifies a minor drop in average high-temperature, transitioning from 80.6°F (27°C) in August to a still warm 75.2°F (24°C). Weather in September »

Weather in October

October, like September, is another refreshing autumn month in River Junction, Iowa, with an average temperature varying between 45°F (7.2°C) and 60.4°F (15.8°C). The shift into October brings a noticeable decrease in the average high-temperature, falling from a warm 75.2°F (24°C) in September to a refreshing 60.4°F (15.8°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in River Junction, Iowa, with an average temperature varying between 46.4°F (8°C) and 32.5°F (0.3°C). Setting in of November comes with a decrease in the average high-temperature, moving from a mild 60.4°F (15.8°C) in October to a frosty 46.4°F (8°C). Weather in November »

Weather in December

The first month of the winter, December, is also an icy month in River Junction, Iowa, with an average temperature ranging between min 22.8°F (-5.1°C) and max 34°F (1.1°C). The beginning of December marks a decrease in the average high-temperature, transitioning from a chilly 46.4°F (8°C) in November to an icy 34°F (1.1°C). Weather in December »
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Frequently asked questions

What time of the year is the coldest in River Junction?

River Junction's January weather, with an average high temperature of 27.3°F (-2.6°C) and an average low temperature of 15.3°F (-9.3°C), tends to be the coldest of the year.

What is the most humid month in River Junction?

The months with the highest humidity are January and July, with an average relative humidity of 83%.

What is the driest month in River Junction?

The months with the least rainfall are January and February Rain falls for 5.7 days and accumulates 1.34" (34mm) of rain.

How much does it rain in River Junction?

Throughout the year, there are 140.4 rainfall days, and 29.57" (751mm) of precipitation is accumulated.

When does it snow in River Junction?

January through April, October through December are months with snowfall in River Junction, Iowa.

When does it snow the most in River Junction?

January is the month with the most snowfall in River Junction. Snow falls for 10.9 days and accumulates 5.28" (134mm) of snow.

How many days does it snow in River Junction?

In River Junction, during the entire year, snow falls for 37.7 days and aggregates up to 16.42" (417mm) of snow.

What is the month with the least sunshine in River Junction?

The month with the least sunshine is January, with an average of 4.2h of sunshine.

When is the lowest UV index in River Junction?

January is the month with the lowest UV index in River Junction, Iowa, with an average maximum UV index of 1.

When is Daylight Saving Time (DST) in River Junction?

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 in River Junction?

The month with the most rainfall in River Junction, Iowa, is May, when the rain falls for 18.4 days and typically aggregates up to 4.69" (119mm) of precipitation.

When it does not snow in River Junction?

May through September are months without snowfall in River Junction, Iowa.

When are the longest days in River Junction?

With an average of 15h and 6min of daylight, June has the longest days of the year in River Junction, Iowa.

What is the month with the highest UV index in River Junction?

June and July, with an average maximum UV index of 6, are months with the highest UV index in River Junction.

What is the hottest time of year in River Junction?

The month of July sees the average highest temperatures, reaching 81.5°F (27.5°C) at the peak and 64.6°F (18.1°C) at the low.

What month has the most sunshine in River Junction?

July has the most sunshine of the year in River Junction, with an average of 10h of sunshine.

What is the least humid month in River Junction?

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

What is the month with the shortest days in River Junction?

The month with the shortest days is December, with an average of 9h and 12min of daylight.

Average temperature
River Junction, IA

Average temperature - River Junction, IA

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (27.3°F).

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).

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Average pressure
River Junction, IA

Average pressure - River Junction, IA

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed
River Junction, IA

Average wind speed - River Junction, IA

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).

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Average humidity
River Junction, IA

Average humidity - River Junction, IA

The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (72%).

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Average rainfall
River Junction, IA

Average rainfall - River Junction, IA

The wettest month (with the highest rainfall) is May (4.69").
The driest months (with the least rainfall) are January and February (1.34").

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Average rainfall days
River Junction, IA

Average rainfall days - River Junction, IA

The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is February (5 days).

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Average snowfall
River Junction, IA

Average snowfall - River Junction, IA

The month with the highest snowfall is January (5.28").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
River Junction, IA

Average snowfall days - River Junction, IA

The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight / Average sunshine
River Junction, IA

Average daylight / Average sunshine - River Junction, IA

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

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Average sunshine days
River Junction, IA

Average sunshine days - River Junction, IA

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10 days).

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Average visibility
River Junction, IA

Average visibility - River Junction, 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).

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River Junction, Iowa, USA

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