| 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; 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
editReferences
- ^ 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.
- ^ 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.
- ^ "Canadian Climate Normals 1991–2020". Environment and Climate Change Canada. Retrieved June 12, 2024.
- ^ "February 1875". Environment and Climate Change Canada. 25 February 2016. Archived from the original on 5 August 2016. Retrieved 25 February 2016.
- ^ "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]
- ^ "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.
- ^ "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.
- ^ "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.