In northern regions like the Yukon, the best time to view the aurora is from late August to mid-April. During the summer months the night skies are not dark enough to see the aurora borealis even at times when the solar wind activity is strong. In midwinter the temperatures may fall to the minus 40 degree range and it is important to wear appropriate winter clothing (please see “winter clothing packages”) to enjoy the displays.
FAQ
What is the best month for Aurora Borealis Viewing?
Why are auroras so colourful?
The colours of the aurora are determined by the composition of gases in the Earth's atmosphere, the altitude at which the aurora occurs, the density of the atmosphere, and the level of energy involved.
Green, the most common colour seen from the ground, is produced when charged particles collide with oxygen at lower altitudes (around 100-300 km). Occasionally, the lower edge of an aurora will have a pink or crimson fringe, which is produced by nitrogen molecules (around 100 km).
Higher in the atmosphere (300-400 km), collisions with atomic oxygen produce reds instead of greens. Since the atmosphere is less dense at higher altitudes, it takes more energy and more time to produce red light (up to two minutes), whereas green light can be made quickly at lower altitudes (about one second).
Hydrogen and helium can also produce blue and purple, but those colours tend to be difficult for our eyes to see against the night sky.
Is aurora borealis viewing best with a moon or no moon?
We like moonlight because it lights up the foreground and makes the sky a deep blue instead of pitch black like with no moon. We watch the lunar phase very carefully to allow for best light compositions for photography.
Three Day - Aurora Weather Forecast
Whitehorse (Canada)
Yukon Climate
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Record high °C (°F) | 10.0 (50) |
11.7 (53.1) |
16.8 (62.2) |
21.8 (71.2) |
34.1 (93.4) |
34.4 (93.9) |
33.2 (91.8) |
31.6 (88.9) |
26.7 (80.1) |
19.3 (66.7) |
13.3 (55.9) |
10.6 (51.1) |
34.4 (93.9) |
| Average high °C (°F) | −11.0 (12.2) |
−7.7 (18.1) |
−0.7 (30.7) |
6.6 (43.9) |
13.5 (56.3) |
19.1 (66.4) |
20.6 (69.1) |
18.5 (65.3) |
12.1 (53.8) |
4.2 (39.6) |
−6.0 (21.2) |
−8.5 (16.7) |
5.1 (41.2) |
| Daily mean °C (°F) | −15.2 (4.6) |
−12.7 (9.1) |
−6.3 (20.7) |
1.0 (33.8) |
7.3 (45.1) |
12.3 (54.1) |
14.3 (57.7) |
12.6 (54.7) |
7.2 (45) |
0.5 (32.9) |
−9.4 (15.1) |
−12.5 (9.5) |
−0.1 (31.8) |
| Average low °C (°F) | −19.2 (−2.6) |
−17.6 (0.3) |
−11.9 (10.6) |
−4.6 (23.7) |
1.0 (33.8) |
5.6 (42.1) |
8.0 (46.4) |
6.7 (44.1) |
2.1 (35.8) |
−3.2 (26.2) |
−12.9 (8.8) |
−16.5 (2.3) |
−5.2 (22.6) |
| Record low °C (°F) | −56.1 (−69) |
−51.1 (−60) |
−42.2 (−44) |
−30.6 (−23.1) |
−12.9 (8.8) |
−6.1 (21) |
−2.2 (28) |
−8.3 (17.1) |
−19.4 (−2.9) |
−31.1 (−24) |
−47.2 (−53) |
−48.3 (−54.9) |
−56.1 (−69) |
| Average mm (inches) | 17.8 (0.701) |
11.8 (0.465) |
10.3 (0.406) |
7.0 (0.276) |
16.3 (0.642) |
32.4 (1.276) |
38.1 (1.5) |
35.8 (1.409) |
33.3 (1.311) |
23.2 (0.913) |
20.1 (0.791) |
16.3 (0.642) |
262.3 (10.327) |
| Average rainfall mm (inches) | 0.3 (0.012) |
0.0 (0) |
0.0 (0) |
1.2 (0.047) |
14.3 (0.563) |
32.4 (1.276) |
38.1 (1.5) |
35.5 (1.398) |
29.0 (1.142) |
8.8 (0.346) |
1.0 (0.039) |
0.4 (0.016) |
160.9 (6.335) |
| Average snowfall cm (inches) | 25.4 (10) |
18.3 (7.2) |
14.8 (5.83) |
7.2 (2.83) |
2.0 (0.79) |
0.0 (0) |
0.0 (0) |
0.3 (0.12) |
4.7 (1.85) |
18.6 (7.32) |
27.0 (10.63) |
23.5 (9.25) |
141.8 (55.83) |
| Average precipitation days (≥ 0.2 mm) | 11.2 | 8.3 | 6.4 | 4.4 | 8.0 | 10.9 | 13.5 | 12.5 | 11.9 | 11.5 | 11.5 | 11.2 | 121.2 |
| Average rainy days (≥ 0.2 mm) | 0.2 | 0.1 | 0.1 | 1.1 | 7.5 | 10.9 | 13.5 | 12.4 | 11.0 | 5.1 | 0.8 | 0.3 | 62.9 |
| Average snowy days (≥ 0.2 cm) | 11.9 | 9.1 | 7.0 | 3.8 | 1.2 | 0.0 | 0.0 | 0.3 | 1.5 | 7.9 | 12.4 | 12.2 | 67.4 |
| Average relative humidity (%) | 72.2 | 64.5 | 51.8 | 42.1 | 38.2 | 39.9 | 46.0 | 47.9 | 54.5 | 64.2 | 75.2 | 74.7 | 55.9 |
| Mean monthly sunshine hours | 43.8 | 105.5 | 163.2 | 238.5 | 251.1 | 266.7 | 247.6 | 226.5 | 132.7 | 84.9 | 39.8 | 26.8 | 1,827.1 |
| Percent possible sunshine | 21.4 | 41.6 | 44.8 | 54.4 | 46.8 | 46.9 | 43.8 | 46.4 | 34.1 | 27.0 | 17.8 | 14.9 | 36.7 |
