Do you need to know, when is the best time to go to Andorra? Then you should take a look here, what weather you can expect there during the year.
The climate of Andorra varies significantly with elevation. The valleys have a temperate climate, but the places with the higher elevation are cooler. Winters tend to be more severe in high altitudes. You can generally expect snowy, cold winters and warm, dry summers.
When speaking about the usual weather in this state, the information is relevant for example for these popular places: Andorra la Vella, Arinsal, Canillo, Encamp, Escaldes Engordany, La Massana, Ordino, Pal, Pas de la Casa, Sant Julia de Loria, Soldeu.
Let's look now what weather you can expect in the area around the capital and in many other cities. The warmest month here is July, the average maximum temperature is 25.2 ℃ (77.36 ℉). The average minimum temperature in this month is 11.2 ℃ (52.16 ℉). The coldest month here is January, the average maximum temperature is 3.1 ℃ (37.58 ℉). The average minimum temperature in this month is -5.1 ℃ (22.82 ℉). The most rainy month here is June, the average number of rainy days is 23.1. The least rainy month here is January, the average number of rainy days is 9.5. 
When travelling to some places in Andorra, always consider the altitude of the the place as well. The highest point here is Pic de Coma Pedrosa (2946 m) and the lowest point is Riu Runer (840 m). So there are quite big differences in altitudes in this country, so you can expect the weather to be different in different altitudes as well. 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 Andorra in January is this: The average highest temperature in Andorra in January is 3.1 ℃ (37.58 ℉). The average lowest temperature is -5.1 ℃ (22.82 ℉). At the beginning of January you can expect lower temperatures, the average highest temperature is around 3.1 ℃ (37.58 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 4.65 ℃ (40.37 ℉). The average number of rainy days in January is 9.5. The average rainfall is 120 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 9:06 (hours and minutes), in the middle of the month 9:24 and at the end of the month 9:54.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 Andorra in February is this: The average highest temperature in Andorra in February is 6.2 ℃ (43.16 ℉). The average lowest temperature is -3 ℃ (26.6 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 4.65 ℃ (40.37 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 8.2 ℃ (46.76 ℉). The average number of rainy days in February is 15.1. The average rainfall is 131 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 9:54 (hours and minutes), in the middle of the month 10:32 and at the end of the month 11:13.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 Andorra in March is this: The average highest temperature in Andorra in March is 10.2 ℃ (50.36 ℉). The average lowest temperature is -1.2 ℃ (29.84 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 8.2 ℃ (46.76 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 11.2 ℃ (52.16 ℉). The average number of rainy days in March is 14.1. The average rainfall is 132 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 11:13 (hours and minutes), in the middle of the month 11:56 and at the end of the month 12:40.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 Andorra in April is this: The average highest temperature in Andorra in April is 12.2 ℃ (53.96 ℉). The average lowest temperature is 0 ℃ (32 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 11.2 ℃ (52.16 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 15.2 ℃ (59.36 ℉). The average number of rainy days in April is 15.2. The average rainfall is 122 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 12:40 (hours and minutes), in the middle of the month 13:22 and at the end of the month 14:02.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 Andorra in May is this: The average highest temperature in Andorra in May is 18.2 ℃ (64.76 ℉). The average lowest temperature is 5.1 ℃ (41.18 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 15.2 ℃ (59.36 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 20.8 ℃ (69.44 ℉). The average number of rainy days in May is 20.2. The average rainfall is 133 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 14:02 (hours and minutes), in the middle of the month 14:36 and at the end of the month 15:02.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 Andorra in June is this: The average highest temperature in Andorra in June is 23.4 ℃ (74.12 ℉). The average lowest temperature is 10.1 ℃ (50.18 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 20.8 ℃ (69.44 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 24.3 ℃ (75.74 ℉). The average number of rainy days in June is 23.1. The average rainfall is 135 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 15:02 (hours and minutes), in the middle of the month 15:16 and at the end of the month 15:16.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 Andorra in July is this: The average highest temperature in Andorra in July is 25.2 ℃ (77.36 ℉). The average lowest temperature is 11.2 ℃ (52.16 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 24.3 ℃ (75.74 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 24.35 ℃ (75.83 ℉). The average number of rainy days in July is 15.4. The average rainfall is 41 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 15:16 (hours and minutes), in the middle of the month 15:01 and at the end of the month 14:34.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 Andorra in August is this: The average highest temperature in Andorra in August is 23.5 ℃ (74.3 ℉). The average lowest temperature is 11.1 ℃ (51.98 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 24.35 ℃ (75.83 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 19.75 ℃ (67.55 ℉). The average number of rainy days in August is 19.6. The average rainfall is 44 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 14:34 (hours and minutes), in the middle of the month 14:00 and at the end of the month 13:21.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 Andorra in September is this: The average highest temperature in Andorra in September is 16 ℃ (60.8 ℉). The average lowest temperature is 5.1 ℃ (41.18 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 19.75 ℃ (67.55 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 15.5 ℃ (59.9 ℉). The average number of rainy days in September is 13.1. The average rainfall is 68 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 13:21 (hours and minutes), in the middle of the month 12:39 and at the end of the month 11:56.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 Andorra in October is this: The average highest temperature in Andorra in October is 15 ℃ (59 ℉). The average lowest temperature is 3.2 ℃ (37.76 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 15.5 ℃ (59.9 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 11.05 ℃ (51.89 ℉). The average number of rainy days in October is 11.1. The average rainfall is 67 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 11:56 (hours and minutes), in the middle of the month 11:14 and at the end of the month 10:32.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 Andorra in November is this: The average highest temperature in Andorra in November is 7.1 ℃ (44.78 ℉). The average lowest temperature is -4.2 ℃ (24.44 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 11.05 ℃ (51.89 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 5.1 ℃ (41.18 ℉). The average number of rainy days in November is 10.2. The average rainfall is 71 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 10:32 (hours and minutes), in the middle of the month 9:55 and at the end of the month 9:25.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 Andorra in December is this: The average highest temperature in Andorra in December is 3.1 ℃ (37.58 ℉). The average lowest temperature is -5.5 ℃ (22.1 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 5.1 ℃ (41.18 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 3.1 ℃ (37.58 ℉). The average number of rainy days in December is 14.5. The average rainfall is 85 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 9:25 (hours and minutes), in the middle of the month 9:07 and at the end of the month 9:04.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.