May weather forecast
Ralston, IA

Weather in May

The last month of the spring, May, is a pleasant month in Ralston, Iowa, with an average temperature varying between 52.9°F (11.6°C) and 69.1°F (20.6°C).

Temperature

In May, the average high-temperature increases from a mild 58.5°F (14.7°C) in April to an agreeable 69.1°F (20.6°C). In May, the average low-temperature is 52.9°F (11.6°C).

Humidity

In Ralston, the average relative humidity in May is 73%.

Rainfall

The month with the most rainfall is May, when the rain falls for 17.3 days and typically aggregates up to 4.29" (109mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows in Ralston. During 0.3 snowfall days, Ralston aggregates 0.24" (6mm) of snow. In Ralston, Iowa, during the entire year, snow falls for 44.8 days and aggregates up to 19.8" (503mm) of snow.

Daylight

The average length of the day in May is 14h and 35min.
On the first day of May, sunrise is at 6:14 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:46 pm CDT.

Sunshine

In May, the average sunshine is 8.6h.

UV index

In May, the average daily maximum UV index in Ralston is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 5 in May interpret into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
[Resources]

FAQ

What is the temperature in May in Ralston?

In Ralston, in May, the average high-temperature is 69.1°F (20.6°C), and the average low-temperature is 52.9°F (11.6°C).

What is the average humidity in May in Ralston?

The average relative humidity in May in Ralston is 73%.

What is the wettest month in Ralston?

May is the month with the most rainfall in Ralston. Rain falls for 17.3 days and accumulates 4.29" (109mm) of precipitation.

How much does it rain in Ralston in May?

In Ralston, during May, the rain falls for 17.3 days and regularly aggregates up to 4.29" (109mm) of precipitation.

What is the last month it snows in Ralston?

May is the last month it regularly snows in Ralston, Iowa. During 0.3 snowfall days, in May, Ralston aggregates 0.24" (6mm) of snow.

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

In May, the average day length is 14h and 35min.

When are sunrise and sunset in May in Ralston?

On the first day of May, sunrise is at 6:14 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:46 pm CDT.

How many hours of sunshine does Ralston have in May?

The average sunshine duration in May in Ralston is 8.6h.

What is the UV index reading in May in Ralston?

In Ralston, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Ralston, IA

Average temperature in May - Ralston, IA
  • Average high temperature in May: 69.1°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 (26.2°F).

  • Average low temperature in May: 52.9°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 (13.6°F).

[Resources]

Average pressure in May
Ralston, IA

Average pressure in May - Ralston, IA
  • Average pressure in May: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

[Resources]

Average wind speed in May
Ralston, IA

Average wind speed in May - Ralston, IA
  • Average wind speed in May: 9.3mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).

[Resources]

Average humidity in May
Ralston, IA

Average humidity in May - Ralston, IA
  • Average humidity in May: 73%

The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are April and October (69%).

[Resources]

Average rainfall in May
Ralston, IA

Average rainfall in May - Ralston, IA
  • Average rainfall in May: 4.29"

The wettest month (with the highest rainfall) is May (4.29").
The driest month (with the least rainfall) is January (0.94").

[Resources]

Average rainfall days in May
Ralston, IA

Average rainfall days in May - Ralston, IA
  • Average rainfall days in May: 17.3 days

The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (4.3 days).

[Resources]

Average snowfall in May
Ralston, IA

Average snowfall in May - Ralston, IA
  • Average snowfall in May: 0.24"

The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").

[Resources]

Average snowfall days in May
Ralston, IA

Average snowfall days in May - Ralston, IA
  • Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

[Resources]

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

Average daylight in May / Average sunshine in May - Ralston, IA
  • Average daylight in May: 14h and 35min

The month with the longest days is June (Average daylight: 15h and 11min).
The month with the shortest days is December (Average daylight: 9h and 10min).

  • Average sunshine in May: 8h and 36min

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 12min).

[Resources]

Average sunshine days in May
Ralston, IA

Average sunshine days in May - Ralston, IA
  • Average sunshine days in May: 11.7 days

The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (10 days).

[Resources]

Average UV index in May
Ralston, IA

Average UV index in May - Ralston, 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 February (UV index 1).

[Resources]

Average cloud cover in May
Ralston, IA

Average cloud cover in May - Ralston, IA
  • Average cloud cover in May: 41

The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 28).

[Resources]

Average visibility in May
Ralston, IA

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

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

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location