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Rainfall/ Precipitation in Ottawa, Ontario, Canada

  • Ottawa, Ontario acquires an average of 869.5 mm (34.2 in) of rainfall per year, or 72.5 mm (2.9 in) per month.
  • On average there are 141 days per year with more than 0.1 mm (0.004 in) of rainfall (precipitation) or 11.8 days with a quantity of rain, sleet, snow etc. per month.
  • The driest weather is in February when an average of 49.7 mm (2 in) of rainfall (precipitation) occurs.
  • The wettest weather is in August when an average of 87.8 mm (3.5 in) of rainfall (precipitation) occurs.

Precipitation Table

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
rainfall iconAverage Precipitation mm (in) 50.8 (2) 49.7 (2) 56.6 (2.2) 64.8 (2.6) 76.8 (3) 84.3 (3.3) 86.5 (3.4) 87.8 (3.5) 83.6 (3.3) 74.7 (2.9) 81 (3.2) 72.9 (2.9) 869.5 (34.2)
rainwater catchment iconPrecipitation Litres/m (Gallons/ft) 50.8 (1.25) 49.7 (1.22) 56.6 (1.39) 64.8 (1.59) 76.8 (1.88) 84.3 (2.07) 86.5 (2.12) 87.8 (2.15) 83.6 (2.05) 74.7 (1.83) 81 (1.99) 72.9 (1.79) 869.5 (21.33)
rain days iconNumber of Wet Days (probability of rain on a day) 13 (42%) 13 (46%) 12 (39%) 11 (37%) 11 (35%) 11 (37%) 11 (35%) 10 (32%) 11 (37%) 11 (35%) 13 (43%) 14 (45%)   141 (39%)
sunny or cloudy iconPercentage of Sunny (Cloudy) Daylight Hours 33 (67) 35 (65) 39 (61) 41 (59) 51 (49) 52 (48) 60 (40) 59 (41) 45 (55) 41 (59) 27 (73) 29 (71)   45 (55)





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Precipitation Nearby Ottawa, Ontario, Canada

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