May weather forecast and climate
Maryland Heights, MO

May, the last month of the spring, in Maryland Heights, is a moderately hot month, with average temperature ranging between max 74.8°F (23.8°C) and min 57.6°F (14.2°C).

Temperature

In Maryland Heights, the average high-temperature in May increases, from a comfortable 65.3°F (18.5°C) in April, to a moderately hot 74.8°F (23.8°C). In Maryland Heights, the average low-temperature is 57.6°F (14.2°C).

Humidity

May is the most humid month in Maryland Heights, with an average relative humidity of 77%.

Rainfall

May is the month with the most rainfall in Maryland Heights. Rain falls for 16 days and accumulates 3.31" (84mm) of precipitation.

Snowfall

In Maryland Heights snow does not fall in April through October.

Daylight

In May, the average length of the day in Maryland Heights is 14.3h.

Sunshine

The average sunshine in May is 9.5h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Maryland Heights. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: In May, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in May in Maryland Heights?

In May, the average high-temperature is 74.8°F (23.8°C), and the average low-temperature is 57.6°F (14.2°C).

What is the most humid month in Maryland Heights?

With an average relative humidity of 77%, May is the most humid month in Maryland Heights.

What is the average humidity in May in Maryland Heights?

In Maryland Heights, Missouri, the average relative humidity in May is 77%.

How many days does it rain in May in Maryland Heights?

In Maryland Heights, Missouri, in May, it is raining for 16 days, with typically 3.31" (84mm) of accumulated precipitation.

What is the wettest month in Maryland Heights?

The month with the most rainfall in Maryland Heights is May when the rain falls for 16 days and typically aggregates up to 3.31" (84mm) of precipitation.

When it does not snow in Maryland Heights?

In Maryland Heights, Missouri, snow does not fall in April through October.

How many hours of daylight does Maryland Heights have in May?

In Maryland Heights, the average length of the day in May is 14.3h.

How long on average sun shines in May in Maryland Heights?

In May, the average sunshine in Maryland Heights, Missouri, is 9.5h.

What is the month with the highest UV index in Maryland Heights?

Months with the highest UV index in Maryland Heights, Missouri, are May through August, with an average maximum UV index of 6.

What is the UV index reading in May in Maryland Heights?

In May, the average daily maximum UV index in Maryland Heights is 6. A UV Index value of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV rays.
Average temperature in May - Maryland Heights, MO
  • Average high temperature in May: 23.8°C

The warmest month (with the highest average high temperature) is July (30.4°C).
The month with the lowest average high temperature is January (2.9°C).

  • Average low temperature in May: 14.2°C

The month with the highest average low temperature is July (20.5°C).
The coldest month (with the lowest average low temperature) is January (-4.3°C).

Average pressure in May - Maryland Heights, MO
  • Average pressure in May: 1014.3mbar

The month with the highest atmospheric pressure is January (1021.2mbar).
The month with the lowest atmospheric pressure is June (1013.2mbar).

Average wind speed in May - Maryland Heights, MO
  • Average wind speed in May: 11.7km/h

The windiest month (with the highest average wind speed) is January (14.9km/h).
The calmest months (with the lowest average wind speed) are July and August (9km/h).

Average humidity in May - Maryland Heights, MO
  • Average humidity in May: 77%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (70%).

Average rainfall in May - Maryland Heights, MO
  • Average rainfall in May: 84mm

The wettest month (with the highest rainfall) is May (84mm).
The driest month (with the least rainfall) is February (36mm).

Average rainfall days in May - Maryland Heights, MO
  • Average rainfall days in May: 16 days

The month with the highest number of rainy days is July (16.3 days).
Months with the least rainy days are February and December (7.3 days).

Average snowfall in May - Maryland Heights, MO
  • Average snowfall in May: 0mm

The month with the highest snowfall is February (52mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in May - Maryland Heights, MO
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (6.8 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in May / Average sunshine in May - Maryland Heights, MO
  • Average daylight in May: 14.3h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in May: 9.5h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is January (Average sunshine: 4.6h).

Average sunshine days in May - Maryland Heights, MO
  • Average sunshine days in May: 12.1 days

The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is July (11.4 days).

Average UV index in May - Maryland Heights, MO
  • Average UV index in May: 6

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

Average cloud cover in May - Maryland Heights, MO
  • Average cloud cover in May: 37

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 - Maryland Heights, MO
  • Average visibility in May: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).