May weather forecast
Bethesda, IA

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Weather in May

May, the last month of the spring in Bethesda, is an agreeable month, with an average temperature varying between 70.9°F (21.6°C) and 54.1°F (12.3°C).

Temperature

In Bethesda, the average high-temperature in May rises, from a comfortable 61.5°F (16.4°C) in April, to an agreeable 70.9°F (21.6°C). Bethesda in May anticipates an average nighttime temperature of 54.1°F (12.3°C).

Humidity

In May, the average relative humidity is 76%.

Rainfall

In May, the rain falls for 16.7 days. Throughout May, 3.15" (80mm) of precipitation is accumulated. Throughout the year, there are 114.9 rainfall days, and 18.39" (467mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Bethesda.

Daylight

In Bethesda, the average length of the day in May is 14h and 29min.
On the first day of the month, sunrise is at 6:17 am and sunset at 8:17 pm. On the last day of May, sunrise is at 5:51 am and sunset at 8:45 pm CDT.

Sunshine

The average sunshine in May is 8.7h.

UV index

The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index, 5 during May, leads to the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in May?

Bethesda in May has an average high-temperature of 70.9°F (21.6°C) and an average low-temperature of 54.1°F (12.3°C).

What is the average humidity in May in Bethesda?

In Bethesda, the average relative humidity in May is 76%.

How much does it rain in May?

In Bethesda, during May, the rain falls for 16.7 days and regularly aggregates up to 3.15" (80mm) of precipitation.

When it does not snow in Bethesda?

May through September are months without snowfall.

Does it snow in May?

In May, it doesn't snow. April is the latest month when it typically snows.

What is the average length of the day in May in Bethesda?

In May, the average day length is 14h and 29min.

When are sunrise and sunset in May?

In May, on the first day of the month, sunrise is at 6:17 am and sunset at 8:17 pm. On the last day of the month, in Bethesda, sunrise is at 5:51 am and sunset at 8:45 pm CDT.

How many hours of sunshine does Bethesda have in May?

The average sunshine duration in May is 8.7h.

What is the UV index intensity in May?

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Bethesda, IA

Average temperature in May - Bethesda, IA
  • Average high temperature in May: 70.9°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (31.1°F).

  • Average low temperature in May: 54.1°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).

Average pressure in May
Bethesda, IA

Average pressure in May - Bethesda, IA
  • Average pressure in May: 29.92"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed in May
Bethesda, IA

Average wind speed in May - Bethesda, IA
  • Average wind speed in May: 8.6mph

The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).

Average humidity in May
Bethesda, IA

Average humidity in May - Bethesda, IA
  • Average humidity in May: 76%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (69%).

Average rainfall in May
Bethesda, IA

Average rainfall in May - Bethesda, IA
  • Average rainfall in May: 3.15"

The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is February (0.43").

Average rainfall days in May
Bethesda, IA

Average rainfall days in May - Bethesda, IA
  • Average rainfall days in May: 16.7 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (3.4 days).

Average snowfall in May
Bethesda, IA

Average snowfall in May - Bethesda, IA
  • Average snowfall in May: 0"

The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
Bethesda, IA

Average snowfall days in May - Bethesda, IA
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Bethesda, IA

Average daylight in May / Average sunshine in May - Bethesda, 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 18min).

  • Average sunshine in May: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

Average sunshine days in May
Bethesda, IA

Average sunshine days in May - Bethesda, IA
  • Average sunshine days in May: 12.7 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (12.3 days).

Average UV index in May
Bethesda, IA

Average UV index in May - Bethesda, IA
  • Average UV index in May: 5

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

Average cloud cover in May
Bethesda, IA

Average cloud cover in May - Bethesda, IA
  • Average cloud cover in May: 40

The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 27).

Average visibility in May
Bethesda, IA

Average visibility in May - Bethesda, IA
  • Average visibility in May: 6mi

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

Bethesda, Iowa, USA

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