May weather forecast
Belle Plaine, IA

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Weather in May

The last month of the spring, May, is an agreeable month in Belle Plaine, Iowa, with an average temperature ranging between min 52.2°F (11.2°C) and max 68.7°F (20.4°C).

Temperature

In Belle Plaine, the onset of May comes with an increased average high-temperature, moving from April's mild 57.7°F (14.3°C) to a pleasant 68.7°F (20.4°C). An average low-temperature of 52.2°F (11.2°C) is noted in Belle Plaine during the month of May.

Humidity

In Belle Plaine, the average relative humidity in May is 78%.

Rainfall

The month with the most rainfall is May, when the rain falls for 18.1 days and typically aggregates up to 4.61" (117mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Belle Plaine aggregates 0.12" (3mm) of snow. In Belle Plaine, during the entire year, snow falls for 39 days and aggregates up to 16.69" (424mm) of snow.

Daylight

In May, the average length of the day is 14h and 34min.
On the first day of the month, sunrise is at 6:04 am and sunset at 8:08 pm. On the last day of May, in Belle Plaine, sunrise is at 5:36 am and sunset at 8:37 pm CDT.

Sunshine

In May, the average sunshine is 8.5h.

UV index

In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 5 in May translates into the following instructions:
Undertake protective steps - Recommendations to avoid sunburn are issued. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average May temperature in Belle Plaine?

In Belle Plaine, 68.7°F (20.4°C) is the average high-temperature and 52.2°F (11.2°C) is the average low-temperature during May.

What is the average humidity in May in Belle Plaine?

In Belle Plaine, Iowa, the average relative humidity in May is 78%.

What is the wettest month in Belle Plaine?

The month with the most rainfall is May, when the rain falls for 18.1 days and typically aggregates up to 4.61" (117mm) of precipitation.

How much does it rain in Belle Plaine in May?

In Belle Plaine, during May, the rain falls for 18.1 days and regularly aggregates up to 4.61" (117mm) of precipitation.

What is the last month it snows in Belle Plaine?

May is the last month it regularly snows. During 0.2 snowfall days, in May, Belle Plaine aggregates 0.12" (3mm) of snow.

What is the average length of the day in May in Belle Plaine?

In Belle Plaine, Iowa, the average day length in May is 14h and 34min.

When are sunrise and sunset in May in Belle Plaine?

On the first day of May in Belle Plaine, Iowa, sunrise is at 6:04 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:37 pm CDT.

How many hours of sunshine does Belle Plaine have in May?

In Belle Plaine, Iowa, the average sunshine duration in May is 8.5h.

What is the UV index reading in May in Belle Plaine?

The average daily maximum UV index in May in Belle Plaine is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Belle Plaine, IA

Average temperature in May - Belle Plaine, IA
  • Average high temperature in May: 68.7°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (25.9°F).

  • Average low temperature in May: 52.2°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 (13.5°F).

Average pressure in May
Belle Plaine, IA

Average pressure in May - Belle Plaine, 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 (29.89"Hg).

Average wind speed in May
Belle Plaine, IA

Average wind speed in May - Belle Plaine, IA
  • Average wind speed in May: 9.2mph

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).

Average humidity in May
Belle Plaine, IA

Average humidity in May - Belle Plaine, IA
  • Average humidity in May: 78%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (72%).

Average rainfall in May
Belle Plaine, IA

Average rainfall in May - Belle Plaine, IA
  • Average rainfall in May: 4.61"

The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is January (1.18").

Average rainfall days in May
Belle Plaine, IA

Average rainfall days in May - Belle Plaine, IA
  • Average rainfall days in May: 18.1 days

The month with the highest number of rainy days is June (19.3 days).
The month with the least rainy days is January (4.5 days).

Average snowfall in May
Belle Plaine, IA

Average snowfall in May - Belle Plaine, IA
  • Average snowfall in May: 0.12"

The month with the highest snowfall is January (5.24").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in May
Belle Plaine, IA

Average snowfall days in May - Belle Plaine, IA
  • Average snowfall days in May: 0.2 days

The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Belle Plaine, IA

Average daylight in May / Average sunshine in May - Belle Plaine, IA
  • Average daylight in May: 14h and 4min

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 May: 8h and 3min

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days in May
Belle Plaine, IA

Average sunshine days in May - Belle Plaine, IA
  • Average sunshine days in May: 10.6 days

The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is June (8.4 days).

Average UV index in May
Belle Plaine, IA

Average UV index in May - Belle Plaine, IA
  • Average UV index in May: 5

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

Average cloud cover in May
Belle Plaine, IA

Average cloud cover in May - Belle Plaine, IA
  • Average cloud cover in May: 43

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).

Average visibility in May
Belle Plaine, IA

Average visibility in May - Belle Plaine, IA
  • Average visibility in May: 6mi

The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).

Belle Plaine, Iowa, USA

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