May weather forecast
Greendale, MO

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Weather in May

The last month of the spring, May, is a warm month in Greendale, Missouri, with an average temperature ranging between max 74.8°F (23.8°C) and min 57.7°F (14.3°C).

Temperature

The shift into May is marked by a rise in the average high-temperature, moving from April's refreshing 65.5°F (18.6°C) to a warm 74.8°F (23.8°C). Greendale registers a consistent average low-temperature of 57.7°F (14.3°C) during May.

Humidity

With an average relative humidity of 78%, May is the most humid month.

Rainfall

The month with the most rainfall is May, when the rain falls for 16.9 days and typically aggregates up to 3.58" (91mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Greendale, the average length of the day in May is 14h and 18min.
On the first day of May, sunrise is at 6:02 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:38 am and sunset at 8:19 pm CDT.

Sunshine

The average sunshine in May in Greendale is 9.5h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: A daily maximum UV index of 6 in May translates into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in May?

The high-temperature during May is 74.8°F (23.8°C) and the low-temperature is 57.7°F (14.3°C).

What is the most humid month?

May is the most humid month, with an average relative humidity of 78%.

What is the average humidity in May?

In May, the average relative humidity is 78%.

What is the wettest month?

The month with the most rainfall is May, when the rain falls for 16.9 days and typically aggregates up to 3.58" (91mm) of precipitation.

How much does it rain in May?

In May, in Greendale, the rain falls for 16.9 days. Throughout May, 3.58" (91mm) of precipitation is accumulated.

When it does not snow?

April through October are months without snowfall.

How many hours of daylight does Greendale have in May?

In Greendale, the average day length in May is 14h and 18min.

When is the sunrise / sunset in May?

In May, on the first day of the month, sunrise is at 6:02 am and sunset at 7:53 pm. On the last day of the month, in Greendale, Missouri, sunrise is at 5:38 am and sunset at 8:19 pm CDT.

How long on average sun shines in May?

In Greendale, the average sunshine duration in May is 9.5h.

When is the highest UV index?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index reading in May?

In May, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
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
Greendale, MO

Average temperature in May - Greendale, MO
  • Average high temperature in May: 74.8°F

The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (37.8°F).

  • Average low temperature in May: 57.7°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in May
Greendale, MO

Average pressure in May - Greendale, MO
  • Average pressure in May: 29.95"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in May
Greendale, MO

Average wind speed in May - Greendale, MO
  • Average wind speed in May: 7.2mph

The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in May
Greendale, MO

Average humidity in May - Greendale, MO
  • Average humidity in May: 78%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (70%).

Average rainfall in May
Greendale, MO

Average rainfall in May - Greendale, MO
  • Average rainfall in May: 3.58"

The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is February (1.69").

Average rainfall days in May
Greendale, MO

Average rainfall days in May - Greendale, MO
  • Average rainfall days in May: 16.9 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (6.5 days).

Average snowfall in May
Greendale, MO

Average snowfall in May - Greendale, MO
  • Average snowfall in May: 0"

The month with the highest snowfall is February (2.6").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in May
Greendale, MO

Average snowfall days in May - Greendale, MO
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are May, June, July and August (0 days).

Average daylight in May /
Average sunshine in May
Greendale, MO

Average daylight in May / Average sunshine in May - Greendale, MO
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in May: 9h and 3min

The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

Average sunshine days in May
Greendale, MO

Average sunshine days in May - Greendale, MO
  • Average sunshine days in May: 11.5 days

The month with the most sunshine days is January (21 days).
The month with the least sunshine days is June (11.2 days).

Average UV index in May
Greendale, MO

Average UV index in May - Greendale, MO
  • Average UV index in May: 6

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

Average cloud cover in May
Greendale, MO

Average cloud cover in May - Greendale, MO
  • Average cloud cover in May: 36

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in May
Greendale, MO

Average visibility in May - Greendale, MO
  • 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).

Greendale, Missouri, USA

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