St. Catharines, Ontario, Canada Climate

Weather: 21.11°C/70.0°F, Wind SW at 1.24 km/h, 98% Humidity, 0% Chance of rain

Canada
(Photo by Joe deSousa on Unsplash)
Contents

St. Catharines Climate Summary

Located at an elevation of 108 meters (354.33 feet) above sea level, St. Catharines has a Humid continental, no dry season, warm summer climate (Classification: Dfb). The district’s yearly temperature is 10.26ºC (50.47ºF) and it is 8.17% higher than Canada’s averages. St. Catharines typically receives about 36.64 millimeters (1.44 inches) of precipitation and has 49.36 rainy days (13.52% of the time) annually.

Country Canada
City Ontario
Longitude -79.2468626
Latitude 43.1593745
Attitude/Elevation 108m (354.33ft)
Local time Monday 10:12
Annual high temperature 12.11ºC (53.8ºF)
Annual low temperature 6.92ºC (44.46ºF)
Average annual precip. 36.64mm (1.44in)
Warmest month July (26.71ºC / 80.08ºF)
Coldest Month January (-6.3ºC / 20.66ºF)
Wettest Month August (45.04mm / 1.77in)
Driest Month March (26.81mm / 1.06in)
Number of days with rainfall (≥ 1.0 mm) 49.36 days (13.52%)
Days with no rain 315.64 days (86.48%)
Humidity 73.66%

Climate St. Catharines: Weather By Month

Month Jan Feb Mar Apr May Jun Jul Aug Sep Nov Oct Dec Year
Record high °C (°F) 10.0(50.0) 13.0(55.4) 15.0(59.0) 19.0(66.2) 27.0(80.6) 29.0(84.2) 31.0(87.8) 31.0(87.8) 31.0(87.8) 26.0(78.8) 18.0(64.4) 12.0(53.6) 31.0(87.8)
Average high °C (°F) -1.4(29.48) 0.2(32.36) 3.86(38.95) 8.38(47.08) 16.32(61.38) 21.44(70.59) 26.71(80.08) 25.39(77.7) 21.83(71.29) 14.17(57.51) 5.96(42.73) 2.48(36.46) 12.11(53.8)
Daily mean °C (°F) -3.1(26.42) -1.54(29.23) 2.01(35.62) 6.42(43.56) 14.06(57.31) 19.24(66.63) 24.56(76.21) 23.43(74.17) 19.73(67.51) 12.37(54.27) 4.62(40.32) 1.33(34.39) 10.26(50.47)
Average low °C (°F) -6.3(20.66) -4.89(23.2) -1.04(30.13) 3.04(37.47) 9.96(49.93) 15.32(59.58) 20.75(69.35) 20.03(68.05) 16.49(61.68) 9.03(48.25) 1.77(35.19) -1.16(29.91) 6.92(44.46)
Record low °C (°F) -20.0(-4.0) -19.0(-2.2) -12.0(10.4) -4.0(24.8) 1.0(33.8) 8.0(46.4) 17.0(62.6) 15.0(59.0) 9.0(48.2) -2.0(28.4) -11.0(12.2) -12.0(10.4) -20.0(-4.0)
Average precipitation mm (inches) 39.5(1.56) 34.61(1.36) 26.81(1.06) 44.29(1.74) 35.95(1.42) 34.53(1.36) 38.58(1.52) 45.04(1.77) 30.09(1.18) 39.71(1.56) 37.39(1.47) 33.16(1.31) 36.64(1.44)
Average precipitation days (≥ 1.0 mm) 4.36 4.09 4.0 3.64 4.36 3.64 4.27 4.82 3.55 4.45 3.82 4.36 4.11
Average relative humidity (%) 78.72 79.07 71.81 71.83 74.44 73.52 70.18 70.15 70.74 71.28 74.79 77.43 73.66
Mean monthly sunshine hours 6.13 6.94 8.69 8.88 12.13 14.0 13.55 10.82 10.58 8.72 6.33 5.26 9.34

Climate Graph

The chart below shows the mean monthly temperature and precipitation of St. Catharines in recent years.

St. Catharines

St. Catharines Temperature by Month

July
24.56°C | 76.21°F
August
23.43°C | 74.17°F
September
19.73°C | 67.51°F
June
19.24°C | 66.63°F
May
14.06°C | 57.31°F
October
12.37°C | 54.27°F
April
6.42°C | 43.56°F
November
4.62°C | 40.32°F
March
2.01°C | 35.62°F
December
1.33°C | 34.39°F
February
-1.54°C | 29.23°F
January
-3.1°C | 26.42°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
Temperature Max Average Min
Max Temperature 26.0°C (78.8°F) 19.87°C (67.77°F) 13.0°C (55.4°F)
Avg Temperature 24.0°C (75.2°F) 17.83°C (64.09°F) 12.0°C (53.6°F)
Min Temperature 22.0°C (71.6°F) 14.9°C (58.82°F) 9.0°C (48.2°F)
Dew Point Max Average Min
Dew Point 20.0°C (68.0°F) 11.63°C (52.93°F) 1.0°C (33.8°F)
Precipitation Max Average Min Sum
Precipitation 27.5mm | 1.08in 2.62mm | 0.1in 0.0mm | 0in 78.5mm | 3.09in
Snowdepth 0.0mm | 0in 0.0mm | 0in 0.0mm | 0in 0.0mm | 0in
Wind Max Average Min
Wind 27.0kmh | 16.78mph 18.5kmh | 11.5mph 11.0kmh | 6.84mph
Gust Wind 49.0kmh | 30.45mph 29.17kmh | 18.13mph 18.0kmh | 11.18mph
Sea Level Pressure Max Average Min
Sea Level Pressure 27.5mb 2.62mb 0.0mb
St. Catharines

Daily Observations

Time Temperature Dew Point Humidity Wind Speed Pressure Precipitation
September ° C | ° F ° C | ° F % Kph | Mph Hg | Mb Total (mm/in)
2020-09-01 24 | 75.2 19 | 66.2 80 15 | 9.32 29.91 | 1013 0.6 | 0.02
2020-09-02 23 | 73.4 20 | 68.0 81 19 | 11.81 29.77 | 1008 26.1 | 1.03
2020-09-03 23 | 73.4 16 | 60.8 70 18 | 11.18 29.74 | 1007 0.0 | 0.0
2020-09-04 19 | 66.2 11 | 51.8 61 25 | 15.53 29.91 | 1013 2.2 | 0.09
2020-09-05 20 | 68.0 11 | 51.8 62 21 | 13.05 30.15 | 1021 0.7 | 0.03
2020-09-06 19 | 66.2 14 | 57.2 74 12 | 7.46 30.12 | 1020 0.7 | 0.03
2020-09-07 21 | 69.8 15 | 59.0 72 26 | 16.16 29.85 | 1011 4.0 | 0.16
2020-09-08 16 | 60.8 12 | 53.6 78 21 | 13.05 30.12 | 1020 4.0 | 0.16
2020-09-09 19 | 66.2 16 | 60.8 86 16 | 9.94 30.21 | 1023 0.1 | 0.0
2020-09-10 16 | 60.8 13 | 55.4 80 15 | 9.32 30.3 | 1026 0.0 | 0.0
2020-09-11 16 | 60.8 10 | 50.0 69 17 | 10.56 30.24 | 1024 0.0 | 0.0
2020-09-12 16 | 60.8 11 | 51.8 71 16 | 9.94 30.12 | 1020 0.5 | 0.02
2020-09-13 20 | 68.0 17 | 62.6 83 25 | 15.53 29.91 | 1013 27.5 | 1.08
2020-09-14 15 | 59.0 9 | 48.2 65 18 | 11.18 30.24 | 1024 0.0 | 0.0
2020-09-15 15 | 59.0 7 | 44.6 60 12 | 7.46 30.3 | 1026 0.0 | 0.0
2020-09-16 20 | 68.0 11 | 51.8 62 26 | 16.16 30.0 | 1016 0.0 | 0.0
2020-09-17 14 | 57.2 9 | 48.2 68 18 | 11.18 30.09 | 1019 0.8 | 0.03
2020-09-18 13 | 55.4 2 | 35.6 49 21 | 13.05 30.24 | 1024 0.0 | 0.0
2020-09-19 12 | 53.6 1 | 33.8 50 16 | 9.94 30.39 | 1029 0.0 | 0.0
2020-09-20 13 | 55.4 1 | 33.8 48 17 | 10.56 30.5 | 1033 0.0 | 0.0
2020-09-21 14 | 57.2 5 | 41.0 57 11 | 6.84 30.47 | 1032 0.0 | 0.0
2020-09-22 16 | 60.8 9 | 48.2 66 12 | 7.46 30.21 | 1023 0.0 | 0.0
2020-09-23 18 | 64.4 13 | 55.4 75 16 | 9.94 29.94 | 1014 0.1 | 0.0
2020-09-24 20 | 68.0 15 | 59.0 79 16 | 9.94 29.94 | 1014 0.0 | 0.0
2020-09-25 19 | 66.2 14 | 57.2 76 13 | 8.08 30.0 | 1016 0.0 | 0.0
2020-09-26 20 | 68.0 15 | 59.0 73 18 | 11.18 29.94 | 1014 0.0 | 0.0
2020-09-27 22 | 71.6 16 | 60.8 71 27 | 16.78 29.8 | 1009 0.0 | 0.0
2020-09-28 21 | 69.8 17 | 62.6 81 16 | 9.94 29.74 | 1007 3.9 | 0.15
2020-09-29 16 | 60.8 11 | 51.8 72 26 | 16.16 29.83 | 1010 1.8 | 0.07
2020-09-30 15 | 59.0 9 | 48.2 67 26 | 16.16 29.62 | 1003 5.5 | 0.22

St. Catharines 3 Year Historical Weather Data

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