Ontario
Oregon, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Ontario, OR

The last month of the spring, May, is a warm month in Ontario, Oregon, with average temperature varying between 73.9°F (23.3°C) and 45°F (7.2°C).

Temperature

In Ontario, the average high-temperature increases, from a comfortable 64.9°F (18.3°C) in April, to a moderately hot 73.9°F (23.3°C). The average low-temperature, in Ontario, is 45°F (7.2°C).

Rainfall

Throughout May, 0.9" (23.6mm) of precipitation is accumulated. Throughout the year, 9.4" (239.9mm) of rain is accumulated.

Snowfall

Throughout the year, 10.2" (259.1mm) of snow is accumulated.

Daylight

The average length of the day in May in Ontario is 14.8h.

What is the temperature in May in Ontario?

In Ontario, Oregon, in May, the average high-temperature is 73.9°F (23.3°C), and the average low-temperature is 45°F (7.2°C).

How much does it rain in Ontario in May?

In Ontario, Oregon, in May, 0.9" (23.6mm) of precipitation is typically accumulated.

How many hours of daylight does Ontario have in May?

In May, the average length of the day in Ontario is 14.8h.
Average temperature in May - Ontario, OR
  • Average high temperature in May: 74°F

The warmest month (with the highest average high temperature) is July (93°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in May: 45°F

The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is January (18°F).

Average rainfall in May - Ontario, OR
  • Average rainfall in May: 0.9"

The wettest month (with the highest rainfall) is December (1.4").
Driest months (with the lowest rainfall) are July and August (0.3").

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

The month with the highest snowfall is December (5").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

Average daylight in May - Ontario, OR
  • Average daylight in May: 14.8h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 8.9h).