Long term weather forecast
Long term weather forecast

May weather forecast and Climate
Ottawa, Canada

  • Average high temperature in May: 19°C

Warmest month (with highest average high temperature) is July (26.5°C).
Month with lowest average high temperature is January (-5.8°C).

  • Average low temperature in May: 7.5°C

Month with highest average low temperature is July (15.5°C).
Coldest month (with lowest average low temperature) is January (-14.8°C).

  • Average humidity in May: 49.9%

Month with highest relative humidity is December (72.2%).
Month with lowest relative humidity is May (49.9%).

  • Average rainfall in May: 80.1mm

Wettest month (with highest rainfall) is June (92.8mm).
Driest month (with lowest rainfall) is February (18.7mm).

  • Average rainfall days in May: 13.4 days

Month with highest number of rainy days is October (13.7 days).
Month with lowest number of rainy days is February (3.9 days).

  • Average snowfall in May: 2mm

Month with highest snowfall is January (539mm).
Months with lowest snowfall are June, July, August and September (0mm).

  • Average snowfall days in May: 0.2 days

Month with highest number of snowfall days is January (16.1 days).
Months with lowest number of snowfall days are June, July, August and September (0 days).

  • Average daylight in May: 15h

Month with longest days is June (Average daylight: 16h).
Months with shortest days are January and December (Average daylight: 9h).

  • Average sunshine in May: 6.8h

Month with most sunshine is July (Average sunshine: 9.7h).
Month with least sunshine is December (Average sunshine: 2.2h).

  • Average UV index in May: 6

Month with highest UV index is June (UV index 8).
Months with lowest UV index are January, November and December (UV index 1).