Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
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). Throughout the month of May, River Junction reports a steady low-temperature average of 53.2°F (11.8°C).Humidity
In River Junction, the average relative humidity in May is 78%.Rainfall
May is the month with the most rainfall. Rain falls for 18.4 days and accumulates 4.69" (119mm) of precipitation.Snowfall
In River Junction, snow does not fall in May through September.Daylight
In River Junction, the average length of the day in May is 14h and 32min.On the first day of May, sunrise is at 6:01 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 5:34 am and sunset at 8:33 pm CDT.
Sunshine
In River Junction, the average sunshine in May is 8.7h.UV index
In River Junction, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 5 during May leads to these advisories:
Take necessary precautions - Suggestions to elude sunburn are provided. It's recommended to limit sun exposure when its radiation is at its peak during midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for River Junction in May?
What is the average humidity in May?
What is the rainiest month?
How much does it rain in May?
When it does not snow?
Does it snow in May?
How many hours of daylight does River Junction have in May?
When is the sunrise / sunset in May?
How many hours of sunshine does River Junction have in May?
What is the UV index intensity in May?
Average temperature in May
River Junction, IA
- Average high temperature in May: 69.8°F
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).
- Average low temperature in May: 53.2°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 in May
River Junction, IA
- Average pressure in May: 29.94"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 in May
River Junction, IA
- Average wind speed in May: 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 in May
River Junction, IA
- Average humidity in May: 78%
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
River Junction, IA
- Average rainfall in May: 4.69"
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 in May
River Junction, IA
- Average rainfall days in May: 18.4 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 in May
River Junction, IA
- Average snowfall in May: 0"
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 in May
River Junction, IA
- Average snowfall days in May: 0 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 in May /
Average sunshine in May
River Junction, IA
- Average daylight in May: 14h and 3min
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 May: 8h and 4min
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 in May
River Junction, IA
- Average sunshine days in May: 10 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 in May
River Junction, IA
- Average UV index in May: 5
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 in May
River Junction, IA
- Average cloud cover in May: 42
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 in May
River Junction, IA
- Average visibility in May: 6mi
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).
River Junction, Iowa, USA
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