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
Weather in May
Temperature
Hillsboro's transition into May is noticed by a slight rise in the average high-temperature, advancing from a mild 58.3°F (14.6°C) in April to an enjoyable 67.1°F (19.5°C). Despite the significant gap from daytime peaks, Hillsboro experiences an average low-temperature of 44.4°F (6.9°C) in May.Humidity
In Hillsboro, the average relative humidity in May is 73%.Rainfall
In Hillsboro, during May, the rain falls for 13.6 days and regularly aggregates up to 1.73" (44mm) of precipitation. In Hillsboro, during the entire year, the rain falls for 173 days and collects up to 29.49" (749mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In May, the average length of the day is 14h and 56min.On the first day of the month, sunrise is at 5:58 am and sunset at 8:19 pm. On the last day of May, in Hillsboro, sunrise is at 5:26 am and sunset at 8:53 pm PDT.
Sunshine
In May, the average sunshine is 8.3h.UV index
In May, the average daily maximum UV index in Hillsboro is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high daily UV index of 4 during May translates into the following directions:
Make use of precautions - Suggestions to resist sunburn are communicated. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
What is the average May temperature in Hillsboro?
What is the average humidity in May in Hillsboro?
How many days does it rain in May in Hillsboro?
When it does not snow in Hillsboro?
What is the average length of the day in May in Hillsboro?
When is the sunrise / sunset in May in Hillsboro?
How many hours of sunshine does Hillsboro have in May?
What is the UV index intensity in May in Hillsboro?
Average temperature in May
Hillsboro, OR
- Average high temperature in May: 67.1°F
The warmest month (with the highest average high temperature) is August (81.5°F).
The month with the lowest average high temperature is December (43.9°F).
- Average low temperature in May: 44.4°F
The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is December (34°F).
Average pressure in May
Hillsboro, 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
Hillsboro, OR
- Average wind speed in May: 4.4mph
The windiest month (with the highest average wind speed) is March (5mph).
The calmest months (with the lowest average wind speed) are June, August and September (4.3mph).
Average humidity in May
Hillsboro, OR
- Average humidity in May: 73%
The months with the highest relative humidity are January, February, November and December (85%).
The month with the lowest relative humidity is August (64%).
Average rainfall in May
Hillsboro, OR
- Average rainfall in May: 1.73"
The wettest month (with the highest rainfall) is January (4.57").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in May
Hillsboro, OR
- Average rainfall days in May: 13.6 days
The month with the highest number of rainy days is March (20.8 days).
The month with the least rainy days is August (4.4 days).
Average snowfall in May
Hillsboro, 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
Hillsboro, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Hillsboro, 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: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in May
Hillsboro, OR
- Average sunshine days in May: 16.2 days
The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (8.5 days).
Average UV index in May
Hillsboro, 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
Hillsboro, OR
- Average cloud cover in May: 49
The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in May
Hillsboro, OR
- Average visibility in May: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January and February (4mi).
Hillsboro, Oregon, USA
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