May weather forecast
La Grande, OR

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Weather in May

May, the last month of the spring in La Grande, is a refreshing month, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 37.6°F (3.1°C).

Temperature

May's onset brings a rise in the average high-temperature, moving from a cool 51.1°F (10.6°C) in April to a comfortable 61.3°F (16.3°C). May nights present a sharp contrast to daytime highs, with average temperatures of 37.6°F (3.1°C).

Humidity

The average relative humidity in May is 67%.

Rainfall

In La Grande, in May, it is raining for 15.8 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, in La Grande, there are 141.7 rainfall days, and 18.43" (468mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall. May is the last month it regularly snows. During 0.8 snowfall days, in May, La Grande aggregates 0.31" (8mm) of snow. Throughout the year, in La Grande, there are 56.6 snowfall days, and 36.85" (936mm) of snow is accumulated.

Daylight

In La Grande, the average length of the day in May is 14h and 55min.
On the first day of the month, sunrise is at 5:39 am and sunset at 7:59 pm. On the last day of May, in La Grande, sunrise is at 5:07 am and sunset at 8:32 pm PDT.

Sunshine

In May, the average sunshine is 11h.

UV index

In La Grande, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In May, a daily maximum UV index of 4 leads to the following instructions:
Guard yourself - Precautionary measures against sun damage are advocated. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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Frequently asked questions

What is the usual temperature for La Grande in May?

In May, the average high-temperature and low-temperature are 61.3°F (16.3°C) and 37.6°F (3.1°C) respectively.

What is the average humidity in May in La Grande?

In May, the average relative humidity in La Grande is 67%.

How much does it rain in La Grande in May?

In La Grande, during May, the rain falls for 15.8 days and regularly aggregates up to 1.57" (40mm) of precipitation.

What is the last month it snows in La Grande?

May is the last month it regularly snows in La Grande, Oregon. During 0.8 snowfall days, in May, La Grande aggregates 0.31" (8mm) of snow.

What is the average length of the day in May in La Grande?

In May, the average day length is 14h and 55min.

When is the sunrise / sunset in May in La Grande?

In May, on the first day of the month, sunrise is at 5:39 am and sunset at 7:59 pm. On the last day of the month, in La Grande, Oregon, sunrise is at 5:07 am and sunset at 8:32 pm PDT.

How many hours of sunshine does La Grande have in May?

In May, the average sunshine duration in La Grande, Oregon, is 11h.

What is the UV index intensity in May in La Grande?

The average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
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
La Grande, OR

Average temperature in May - La Grande, OR
  • Average high temperature in May: 61.3°F

The warmest month (with the highest average high temperature) is August (81.3°F).
The month with the lowest average high temperature is December (32.5°F).

  • Average low temperature in May: 37.6°F

The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (20.5°F).

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Average pressure in May
La Grande, OR

Average pressure in May - La Grande, OR
  • Average pressure in May: 29.95"Hg

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).

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Average wind speed in May
La Grande, OR

Average wind speed in May - La Grande, OR
  • Average wind speed in May: 4.9mph

The windiest month (with the highest average wind speed) is January (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).

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Average humidity in May
La Grande, OR

Average humidity in May - La Grande, OR
  • Average humidity in May: 67%

The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is August (45%).

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Average rainfall in May
La Grande, OR

Average rainfall in May - La Grande, OR
  • Average rainfall in May: 1.57"

The wettest month (with the highest rainfall) is December (2.48").
The driest month (with the least rainfall) is July (0.35").

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Average rainfall days in May
La Grande, OR

Average rainfall days in May - La Grande, OR
  • Average rainfall days in May: 15.8 days

The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (4.8 days).

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Average snowfall in May
La Grande, OR

Average snowfall in May - La Grande, OR
  • Average snowfall in May: 0.31"

The month with the highest snowfall is February (10.2").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in May
La Grande, OR

Average snowfall days in May - La Grande, OR
  • Average snowfall days in May: 0.8 days

The month with the highest number of snowfall days is December (13.2 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in May /
Average sunshine in May
La Grande, OR

Average daylight in May / Average sunshine in May - La Grande, OR
  • Average daylight in May: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in May: 11h and 0min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 5h and 6min).

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Average sunshine days in May
La Grande, OR

Average sunshine days in May - La Grande, OR
  • Average sunshine days in May: 12.8 days

The month with the most sunshine days is July (23.4 days).
The month with the least sunshine days is February (9.1 days).

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Average UV index in May
La Grande, OR

Average UV index in May - La Grande, OR
  • Average UV index in May: 4

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

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Average cloud cover in May
La Grande, OR

Average cloud cover in May - La Grande, OR
  • Average cloud cover in May: 29

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 10).

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Average visibility in May
La Grande, OR

Average visibility in May - La Grande, OR
  • Average visibility in May: 6mi

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

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La Grande, Oregon, USA

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