Template:St. John's, Newfoundland and Labrador weatherbox

Climate data for St. John's (St. John's International Airport)
WMO ID: 71801; coordinates 47°37′20″N 52°44′34″W / 47.62222°N 52.74278°W / 47.62222; -52.74278 (St. John's International Airport); elevation: 140.5 m (461 ft); 1991–2020 normals, extremes 1874–present[a]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high humidex 19.2 17.3 17.2 26.1 30.3 34.8 38.7 37.7 35.8 30.4 24.1 22.0 38.7
Record high °C (°F) 15.7
(60.3)
16.0
(60.8)
19.4
(66.9)
24.1
(75.4)
27.6
(81.7)
30.6
(87.1)
32.2
(90.0)
33.9
(93.0)
29.5
(85.1)
24.6
(76.3)
19.4
(66.9)
17.9
(64.2)
33.9
(93.0)
Mean daily maximum °C (°F) −0.7
(30.7)
−1.0
(30.2)
1.2
(34.2)
5.6
(42.1)
11.0
(51.8)
15.7
(60.3)
20.9
(69.6)
20.8
(69.4)
17.0
(62.6)
11.2
(52.2)
6.7
(44.1)
2.1
(35.8)
9.2
(48.6)
Daily mean °C (°F) −4.2
(24.4)
−4.7
(23.5)
−2.2
(28.0)
1.8
(35.2)
6.3
(43.3)
10.8
(51.4)
16.0
(60.8)
16.5
(61.7)
12.8
(55.0)
7.8
(46.0)
3.4
(38.1)
−1.0
(30.2)
5.3
(41.5)
Mean daily minimum °C (°F) −7.8
(18.0)
−8.4
(16.9)
−5.7
(21.7)
−1.9
(28.6)
1.6
(34.9)
5.9
(42.6)
11.2
(52.2)
12.1
(53.8)
8.5
(47.3)
4.3
(39.7)
0.0
(32.0)
−4.1
(24.6)
1.3
(34.4)
Record low °C (°F) −28.3
(−18.9)
−29.4
(−20.9)
−25.6
(−14.1)
−18.3
(−0.9)
−6.7
(19.9)
−3.3
(26.1)
−1.1
(30.0)
0.5
(32.9)
−1.7
(28.9)
−5.6
(21.9)
−14.4
(6.1)
−20.0
(−4.0)
−29.4
(−20.9)
Record low wind chill −35.7 −40.3 −40.3 −21.4 −14.2 −8.4 −3.4 0.0 −4.4 −11.8 −24.6 −34.3 −40.3
Average precipitation mm (inches) 153.0
(6.02)
122.8
(4.83)
140.1
(5.52)
121.6
(4.79)
98.1
(3.86)
88.2
(3.47)
100.1
(3.94)
99.8
(3.93)
125.8
(4.95)
158.1
(6.22)
157.4
(6.20)
173.9
(6.85)
1,538.9
(60.58)
Average rainfall mm (inches) 67.7
(2.67)
55.3
(2.18)
78.9
(3.11)
91.9
(3.62)
93.6
(3.69)
88.1
(3.47)
100.1
(3.94)
99.8
(3.93)
125.8
(4.95)
155.7
(6.13)
132.4
(5.21)
107.7
(4.24)
1,197
(47.13)
Average snowfall cm (inches) 95.4
(37.6)
77.1
(30.4)
62.0
(24.4)
29.5
(11.6)
4.5
(1.8)
0.0
(0.0)
0.0
(0.0)
0.0
(0.0)
0.0
(0.0)
2.3
(0.9)
22.3
(8.8)
70.3
(27.7)
363.4
(143.2)
Average precipitation days (≥ 0.2 mm) 21.7 18.8 19.0 17.2 16.9 14.6 13.5 14.1 15.3 18.1 19.0 21.5 209.7
Average rainy days (≥ 0.2 mm) 9.7 8.4 10.9 13.6 16.3 14.6 13.5 14.1 15.3 17.8 15.6 12.7 162.5
Average snowy days (≥ 0.2 cm) 18.4 15.2 13.3 7.5 2.0 0.04 0.0 0.0 0.04 0.96 6.6 14.0 78.0
Average relative humidity (%) (at 15:00 LST) 80.8 77.4 76.2 74.5 71.1 71.3 70.4 71.6 73.0 77.0 79.6 82.6 75.5
Mean monthly sunshine hours 65.5 90.2 107.4 140.4 176.3 198.9 216.7 206.6 170.5 122.1 76.3 62.4 1,633.2
Mean daily sunshine hours 8.7 10.2 11.2 13.6 15.0 15.5 14.9 14.2 12.9 10.3 10.1 8.5 15.5
Percent possible sunshine 23.7 31.1 29.2 34.3 37.6 41.7 44.9 46.7 45.1 36.2 27.2 23.7 35.1
Average ultraviolet index 1 2 3 5 6 7 7 7 5 3 1 1 4
Source: Environment and Climate Change Canada[3][4][1][2][5][6][7] and Weather Atlas[8]

Notes

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  1. ^ Based on station coordinates provided by Environment and Climate Change Canada, climate data was collected in the area of downtown St. John's from 1874 to 1956,[1] and at St. John's Airport from 1942 to the present day.[2]

References

  1. ^ a b "St John's". Canadian Climate Data. Environment and Climate Change Canada. 31 October 2011. Archived from the original on 5 August 2016. Retrieved 8 April 2016.
  2. ^ a b "St John's A". Canadian Climate Normals 1981–2010. Environment and Climate Change Canada. June 2011. Archived from the original on 12 August 2014. Retrieved 16 March 2014.
  3. ^ "Canadian Climate Normals 1991–2020". Environment and Climate Change Canada. Retrieved June 12, 2024.
  4. ^ "February 1875". Environment and Climate Change Canada. 25 February 2016. Archived from the original on 5 August 2016. Retrieved 25 February 2016.
  5. ^ "Climate and sunshine data for St John's A". Canadian Climate Normals 1981–2010. [Environment and Climate Change Canada. June 2011. Retrieved 16 September 2013. [permanent dead link]
  6. ^ "Daily Data Report for August 1876 – Climate – Environment and Climate Change Canada". climate.weather.gc.ca. Environment and Climate Change Canada. 31 October 2011. Archived from the original on 8 November 2021. Retrieved 19 June 2018.
  7. ^ "Daily Data Report for December 2017 – Climate – Environment and Climate Change Canada". 31 October 2011. Archived from the original on 13 January 2018. Retrieved 12 January 2018.
  8. ^ "Saint John, Canada – Detailed climate information and monthly weather forecast". Yu Media GroupWeather Atlas. Archived from the original on 6 July 2019. Retrieved 6 July 2019.