Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
May
Weather in May
Temperature
The average high-temperature mildly increases in May, edging from a mild 57.7°F (14.3°C) in April to a still refreshing 65.5°F (18.6°C). Marked by a significant temperature drop from daytime highs, the average nighttime temperature lowers to a cold 41.2°F (5.1°C) throughout May.Humidity
In May, the average relative humidity in Harrisburg is 78%.Rainfall
In Harrisburg, in May, it is raining for 13.1 days, with typically 1.81" (46mm) of accumulated precipitation. 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 6:02 am and sunset at 8:17 pm. On the last day of May, sunrise is at 5:31 am and sunset at 8:49 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 estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 4 in May leads to these recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Around midday, solar radiation is most harmful; hence, exposure should be limited. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the average humidity in May?
How much does it rain in May?
When it does not snow?
How many hours of daylight does Harrisburg have in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
What is the UV index intensity in May?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).