May weather forecast
Harrisburg, OR

Weather in May

The last month of the spring, May, is a comfortable month in Harrisburg, Oregon, with an average temperature fluctuating between 41.2°F (5.1°C) and 65.5°F (18.6°C).

Temperature

In May, the average high-temperature slightly increases from a moderate 57.7°F (14.3°C) in April to a comfortable 65.5°F (18.6°C). The average low-temperature, in Harrisburg, Oregon, is 41.2°F (5.1°C).

Humidity

The average relative humidity in May in Harrisburg, Oregon, is 78%.

Rainfall

In Harrisburg, Oregon, in May, during 13.1 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. Throughout the year, there are 161.8 rainfall days, and 28.82" (732mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

In Harrisburg, the average length of the day in May is 14h and 48min.
On the first day of the month, sunrise is at 6:03 am and sunset at 8:16 pm. On the last day of May, in Harrisburg, Oregon, sunrise is at 5:32 am and sunset at 8:48 pm PDT.

Sunshine

In Harrisburg, the average sunshine in May is 8.5h.

UV index

The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the temperature in May in Harrisburg?

The average high-temperature, in May, is 65.5°F (18.6°C), while the average low-temperature is 41.2°F (5.1°C).

What is the average humidity in May in Harrisburg?

In May, the average relative humidity is 78%.

How much does it rain in Harrisburg in May?

In May, the rain falls for 13.1 days. Throughout May, 1.81" (46mm) of precipitation is accumulated.

When it does not snow in Harrisburg?

April through October are months without snowfall in Harrisburg.

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

In Harrisburg, Oregon, the average day length in May is 14h and 48min.

What time are sunrise and sunset in May in Harrisburg?

In May, on the first day of the month, sunrise is at 6:03 am and sunset at 8:16 pm. On the last day of the month, in Harrisburg, sunrise is at 5:32 am and sunset at 8:48 pm PDT.

How long on average sun shines in May in Harrisburg?

In May, the average sunshine duration in Harrisburg, Oregon, is 8.5h.

What is the UV index reading in May in Harrisburg?

The average daily maximum UV index in May in Harrisburg, Oregon, is 4. A UV Index reading of 3 to 5 represents a moderate 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
Harrisburg, OR

Average temperature in May - Harrisburg, OR
  • Average high temperature in May: 65.5°F

The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (45.7°F).

  • Average low temperature in May: 41.2°F

The month with the highest average low temperature is August (51.1°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).

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Average pressure in May
Harrisburg, OR

Average pressure in May - Harrisburg, OR
  • Average pressure in May: 30.04"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).

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Average wind speed in May
Harrisburg, OR

Average wind speed in May - Harrisburg, OR
  • Average wind speed in May: 4.2mph

The windiest month (with the highest average wind speed) is March (4.8mph).
The calmest month (with the lowest average wind speed) is September (3.8mph).

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Average humidity in May
Harrisburg, OR

Average humidity in May - Harrisburg, OR
  • Average humidity in May: 78%

The months with the highest relative humidity are January, February, March and December (87%).
The month with the lowest relative humidity is August (68%).

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Average rainfall in May
Harrisburg, OR

Average rainfall in May - Harrisburg, OR
  • Average rainfall in May: 1.81"

The wettest month (with the highest rainfall) is December (4.37").
The driest month (with the least rainfall) is July (0.2").

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Average rainfall days in May
Harrisburg, OR

Average rainfall days in May - Harrisburg, OR
  • Average rainfall days in May: 13.1 days

The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is August (3.6 days).

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Average snowfall in May
Harrisburg, OR

Average snowfall in May - Harrisburg, OR
  • Average snowfall in May: 0"

The month with the highest snowfall is February (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in May
Harrisburg, OR

Average snowfall days in May - Harrisburg, OR
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in May /
Average sunshine in May
Harrisburg, OR

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

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in May: 8h and 3min

The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).

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Average sunshine days in May
Harrisburg, OR

Average sunshine days in May - Harrisburg, OR
  • Average sunshine days in May: 15.3 days

The month with the most sunshine days is July (26.2 days).
The months with the least sunshine days are February and March (9.4 days).

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Average UV index in May
Harrisburg, OR

Average UV index in May - Harrisburg, 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, November and December (UV index 2).

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Average cloud cover in May
Harrisburg, OR

Average cloud cover in May - Harrisburg, OR
  • Average cloud cover in May: 49

The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 22).

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Average visibility in May
Harrisburg, OR

Average visibility in May - Harrisburg, OR
  • Average visibility in May: 5mi

The months with the highest visibility are May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March, April and December (4mi).

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