Do you need to know, when is the best time to go to Yukon? Then you should take a look here, what weather you can expect there during the year.
Yukon is part of Canada. Canada is a huge country, so the climate here varies from temperate in south to subarctic and arctic in north. Winters are sometimes tough, especially in the interior, where the climate is continental. You can expect snow in some places for five months of the year. Southern coastal parts of Canada have a temperate climate, with mild and rainy winters and quite warm summers.
When speaking about the usual weather in this area, the information is relevant for example for these popular places: Dawson City, Kluane National Park, Watson Lake, Whitehorse.
Let's look now what weather you can expect in the area around Whitehorse and in many other cities. The warmest month here is July, the average maximum temperature is 20.8 ℃ (69.44 ℉). The average minimum temperature in this month is 7.9 ℃ (46.22 ℉). The coldest month here is January, the average maximum temperature is -12.9 ℃ (8.78 ℉). The average minimum temperature in this month is -21.8 ℃ (-7.24 ℉). The most rainy month here is July, the average number of rainy days is 13.6. The least rainy month here is April, the average number of rainy days is 5.1. 
When travelling around Yukon, always consider the altitude of the the place as well. We should remind you, that the highest point in Canada is Mount Logan (5959 m) and the lowest point is Atlantic Ocean (0 m). So there are huge differences in altitudes in this country and the weather is very different in them therefore. Keep in mind, that the temperature usually decreases by 1.2 - 1.9 ℃ (2.2 - 3.5 ℉) per 200 m (656 ft), depending on the other conditions. (And we should add, that in the very special condition named thermal inversion even the temperature may be higher in higher altitudes.)
Typical (usual) weather in Yukon in January is this: The average highest temperature in Yukon in January is -12.9 ℃ (8.78 ℉). The average lowest temperature is -21.8 ℃ (-7.24 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around -11.55 ℃ (11.21 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around -10.7 ℃ (12.74 ℉). The average number of rainy days in January is 10.8. The average rainfall is 16.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 5:46 (hours and minutes), in the middle of the month 6:32 and at the end of the month 7:41.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Yukon in February is this: The average highest temperature in Yukon in February is -8.5 ℃ (16.7 ℉). The average lowest temperature is -18.3 ℃ (-0.94 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around -10.7 ℃ (12.74 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around -4.55 ℃ (23.81 ℉). The average number of rainy days in February is 8.5. The average rainfall is 11.6 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 7:41 (hours and minutes), in the middle of the month 9:01 and at the end of the month 10:25.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Yukon in March is this: The average highest temperature in Yukon in March is -0.6 ℃ (30.92 ℉). The average lowest temperature is -11.9 ℃ (10.58 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around -4.55 ℃ (23.81 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 3.1 ℃ (37.58 ℉). The average number of rainy days in March is 7.2. The average rainfall is 10.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:25 (hours and minutes), in the middle of the month 11:49 and at the end of the month 13:14.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Yukon in April is this: The average highest temperature in Yukon in April is 6.8 ℃ (44.24 ℉). The average lowest temperature is -4.5 ℃ (23.9 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 3.1 ℃ (37.58 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 10.05 ℃ (50.09 ℉). The average number of rainy days in April is 5.1. The average rainfall is 6.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:14 (hours and minutes), in the middle of the month 14:38 and at the end of the month 16:01.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Yukon in May is this: The average highest temperature in Yukon in May is 13.3 ℃ (55.94 ℉). The average lowest temperature is 0.9 ℃ (33.62 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 10.05 ℃ (50.09 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 16.05 ℃ (60.89 ℉). The average number of rainy days in May is 7.2. The average rainfall is 14.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 16:01 (hours and minutes), in the middle of the month 17:19 and at the end of the month 18:25.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Yukon in June is this: The average highest temperature in Yukon in June is 18.8 ℃ (65.84 ℉). The average lowest temperature is 5.2 ℃ (41.36 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 16.05 ℃ (60.89 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 19.8 ℃ (67.64 ℉). The average number of rainy days in June is 10.6. The average rainfall is 31.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 18:25 (hours and minutes), in the middle of the month 19:04 and at the end of the month 19:03.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Yukon in July is this: The average highest temperature in Yukon in July is 20.8 ℃ (69.44 ℉). The average lowest temperature is 7.9 ℃ (46.22 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 19.8 ℃ (67.64 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 19.75 ℃ (67.55 ℉). The average number of rainy days in July is 13.6. The average rainfall is 40.4 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 19:03 (hours and minutes), in the middle of the month 18:22 and at the end of the month 17:15.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Yukon in August is this: The average highest temperature in Yukon in August is 18.7 ℃ (65.66 ℉). The average lowest temperature is 6.5 ℃ (43.7 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 19.75 ℃ (67.55 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 15.7 ℃ (60.26 ℉). The average number of rainy days in August is 12.6. The average rainfall is 39.6 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 17:15 (hours and minutes), in the middle of the month 15:57 and at the end of the month 14:35.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Yukon in September is this: The average highest temperature in Yukon in September is 12.7 ℃ (54.86 ℉). The average lowest temperature is 2.2 ℃ (35.96 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 15.7 ℃ (60.26 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 8.65 ℃ (47.57 ℉). The average number of rainy days in September is 11.6. The average rainfall is 34.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 14:35 (hours and minutes), in the middle of the month 13:12 and at the end of the month 11:49.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Yukon in October is this: The average highest temperature in Yukon in October is 4.6 ℃ (40.28 ℉). The average lowest temperature is -2.9 ℃ (26.78 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 8.65 ℃ (47.57 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around -0.5 ℃ (31.1 ℉). The average number of rainy days in October is 11.8. The average rainfall is 24.2 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:49 (hours and minutes), in the middle of the month 10:26 and at the end of the month 9:03.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Yukon in November is this: The average highest temperature in Yukon in November is -5.6 ℃ (21.92 ℉). The average lowest temperature is -13.1 ℃ (8.42 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around -0.5 ℃ (31.1 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around -7.9 ℃ (17.78 ℉). The average number of rainy days in November is 11.3. The average rainfall is 19 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 9:03 (hours and minutes), in the middle of the month 7:43 and at the end of the month 6:34.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Yukon in December is this: The average highest temperature in Yukon in December is -10.2 ℃ (13.64 ℉). The average lowest temperature is -19 ℃ (-2.2 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around -7.9 ℃ (17.78 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around -11.55 ℃ (11.21 ℉). The average number of rainy days in December is 11.9. The average rainfall is 18.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 6:34 (hours and minutes), in the middle of the month 5:47 and at the end of the month 5:39.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.