Climate and monthly weather forecastRiver Junction, IA
Climate and monthly weather forecast
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 high of 27.3°F (-2.6°C) and an average low of 15.3°F (-9.3°C). January, with its high-temperature average of 27.3°F (-2.6°C) and a low-temperature average of 15.3°F (-9.3°C), is the coldest month. Weather in January »Weather in February
February, the last month of the winter in River Junction, is a wintry month, with an average temperature fluctuating between 19°F (-7.2°C) and 32°F (0°C). River Junction starts February with an average high-temperature of a wintry 32°F (0°C), hinting at a minimal fluctuation from January. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in River Junction, Iowa, with temperature in the range of an average high of 46.6°F (8.1°C) and an average low of 31.6°F (-0.2°C). The beginning of March marks a clear shift in the average high-temperature, advancing from February's wintry 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). With the onset of April, River Junction's average high-temperature sees a rise, moving from March's frosty 46.6°F (8.1°C) to a moderate 58.6°F (14.8°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in River Junction, Iowa, with temperature in the range of an average low of 53.2°F (11.8°C) and an average high of 69.8°F (21°C). River Junction's transition into May is marked by a rise in the average high-temperature, advancing from a moderate 58.6°F (14.8°C) in April to an agreeable 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 an average temperature fluctuating between 62.1°F (16.7°C) and 79.2°F (26.2°C). River Junction in June shows a temperature shift, moving from an average high of an agreeable 69.8°F (21°C) in May to a moderately hot 79.2°F (26.2°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in River Junction, Iowa, with an average temperature ranging between min 64.6°F (18.1°C) and max 81.5°F (27.5°C). July is the warmest month, with an average high-temperature of 81.5°F (27.5°C) and an average low-temperature of 64.6°F (18.1°C). July's average heat index is estimated at a tropical 87.8°F (31°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in River Junction, Iowa, with an average temperature ranging between min 62.2°F (16.8°C) and max 80.6°F (27°C). Transitioning into August, River Junction experiences an average high-temperature of a still warm 80.6°F (27°C), marking a minor shift from the preceding month. Weather in August »Weather in September
September, the first month of the autumn in River Junction, is also a moderately hot month, with an average temperature ranging between max 75.2°F (24°C) and min 55.8°F (13.2°C). In River Junction, the average high-temperature in September slightly decreases from 80.6°F (27°C) in August to a still moderately hot 75.2°F (24°C). Weather in September »Weather in October
October, the same as September, in River Junction, Iowa, is a moderate autumn month, with an average temperature varying between 60.4°F (15.8°C) and 45°F (7.2°C). October's onset brings a noticeable temperature drop, falling from a warm 75.2°F (24°C) in September to a moderate 60.4°F (15.8°C). Weather in October »Weather in November
November, the last month of the autumn in River Junction, is also a frosty month, with an average temperature ranging between min 32.5°F (0.3°C) and max 46.4°F (8°C). November weather is marked by a drop in the average high-temperature, falling from a refreshing 60.4°F (15.8°C) in October to a chilly 46.4°F (8°C). Weather in November »Weather in December
December, the first month of the winter in River Junction, is also an icy month, with an average temperature ranging between max 34°F (1.1°C) and min 22.8°F (-5.1°C). The transition into December indicates a reduction in the average high-temperature, down to a cold 34°F (1.1°C) from November's frosty 46.4°F (8°C). Weather in December »Updated: Jun 21, 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
River Junction's January weather, marked by an average high temperature of 27.3°F (-2.6°C) and an average low temperature of 15.3°F (-9.3°C), is the coldest in the year.
The months with the highest humidity are January and July, with an average relative humidity of 83%.
The months with the least rainfall in River Junction, Iowa, are January and February Rain falls for 5.7 days and accumulates 1.34" (34mm) of rain.
In River Junction, during the entire year, the rain falls for 140.4 days and collects up to 29.57" (751mm) of precipitation.
Months with snowfall are January through April, October through December.
The month with the most snowfall in River Junction, Iowa, is January, when snow falls for 10.9 days and typically aggregates up to 5.28" (134mm) of snow.
Throughout the year, there are 37.7 snowfall days, and 16.42" (417mm) of snow is accumulated.
With an average of 4.2h of sunshine, January has the least sunshine of the year in River Junction.
The month with the lowest UV index is January, with an average maximum UV index of 1.
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 in River Junction. Rain falls for 18.4 days and accumulates 4.69" (119mm) of precipitation.
In River Junction, Iowa, snow does not fall in May through September.
The month with the longest days is June, with an average of 15h and 6min of daylight.
June and July, with an average maximum UV index of 6, are months with the highest UV index.
River Junction reaches its average highest temperatures in July, measuring 81.5°F (27.5°C) at the peak and 64.6°F (18.1°C) at the lowest.
The month with the most sunshine is July, with an average of 10h of sunshine.
With an average relative humidity of 72%, October is the least humid month.
The month with the shortest days is December, with an average of 9h and 12min of daylight.
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).
Average pressure
River Junction, IA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"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:
29.9"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:
30.01"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 (29.9"Hg).
Average wind speed
River Junction, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9mph - Average wind speed in June:
7.9mph
- Average wind speed in July:
6.9mph - Average wind speed in August:
6.9mph - Average wind speed in September:
8mph - Average wind speed in October:
9.6mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.9mph
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).
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%).
Average rainfall
River Junction, IA
- Average rainfall in January:
1.34" - Average rainfall in February:
1.34" - Average rainfall in March:
2.09" - Average rainfall in April:
3.19" - Average rainfall in May:
4.69" - Average rainfall in June:
3.9"
- Average rainfall in July:
3.03" - Average rainfall in August:
1.93" - Average rainfall in September:
2.44" - Average rainfall in October:
2.48" - Average rainfall in November:
1.69" - Average rainfall in December:
1.46"
The wettest month (with the highest rainfall) is May (4.69").
The driest months (with the least rainfall) are January and February (1.34").
Average rainfall days
River Junction, IA
- Average rainfall days in January:
5.7 days - Average rainfall days in February:
5 days - Average rainfall days in March:
11.5 days - Average rainfall days in April:
15.3 days - Average rainfall days in May:
18.4 days - Average rainfall days in June:
17.7 days
- Average rainfall days in July:
15.2 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
12 days - Average rainfall days in October:
11.5 days - Average rainfall days in November:
8.3 days - Average rainfall days in December:
7 days
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).
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").
Average snowfall days
River Junction, IA
- Average snowfall days in January:
10.9 days - Average snowfall days in February:
9.4 days - Average snowfall days in March:
4.9 days - Average snowfall days in April:
1.3 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:
0.5 days - Average snowfall days in November:
2.3 days - Average snowfall days in December:
8.4 days
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).
Average daylight / Average sunshine
River Junction, IA
- Average daylight in January:
9h and 36min - 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 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - 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 54min - Average daylight in December:
9h and 12min
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).
- Average sunshine in January:
4h and 12min - Average sunshine in February:
4h and 18min - Average sunshine in March:
6h and 30min - Average sunshine in April:
7h and 48min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 18min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 24min
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).
Average sunshine days
River Junction, IA
- Average sunshine days in January:
16.3 days - Average sunshine days in February:
15 days - Average sunshine days in March:
14.6 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
10 days - Average sunshine days in June:
10.1 days
- Average sunshine days in July:
12.2 days - Average sunshine days in August:
15.8 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
17.9 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
17 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10 days).
Average UV index
River Junction, IA
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
River Junction, IA
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 29).
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).
