Do you need to know, when is the best time to go to Faroe Islands? Then you should take a look here, what weather you can expect there during the year.
The climate of Faroe Islands is subpolar oceanic. You can expect mild winters and cool summers. The sky is usually overcast, it is often foggy and windy. Some areas have a tundra climate, especially the mountains.
When speaking about the usual weather in this state, the information is relevant for example for these popular places: Bøur, Eiði, Eysturoy, Fuglafjørður, Fámjin, Gjógv, Gásadalur, Haldarsvík, Hov, Hoyvík, Hvalba, Kirkjubøur, Northern Islands, Northern Streymoy, Nólsoy, Oyndarfjørður, Porkeri, Saksun, Sandoyar, Southern Streymoy, Sumba, Suðuroy, Tjørnuvík, Tvøroyri, Tórshavn, Vestmanna, Viðareiði, Vágar, Vágur, Øravík.
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 August, the average maximum temperature is 13.3 ℃ (55.94 ℉). The average minimum temperature in this month is 9.2 ℃ (48.56 ℉). The coldest month here is January, the average maximum temperature is 5.3 ℃ (41.54 ℉). The average minimum temperature in this month is 1.2 ℃ (34.16 ℉). The most rainy month here is December, the average number of rainy days is 27.2. The least rainy month here is June, the average number of rainy days is 18.4. 
When travelling to some places in Faroe Islands, always consider the altitude of the the place as well. The highest point here is Slaettaratindur (882 m) and the lowest point is Atlantic Ocean (0 m). So there are not big differences in altitudes in this country. But the altitude affects the weather even so. 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 Faroe Islands in January is this: The average highest temperature in Faroe Islands in January is 5.3 ℃ (41.54 ℉). The average lowest temperature is 1.2 ℃ (34.16 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 5.8 ℃ (42.44 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 5.75 ℃ (42.35 ℉). The average number of rainy days in January is 26.4. The average rainfall is 131.7 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 5:18 (hours and minutes), in the middle of the month 6:09 and at the end of the month 7:24.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.Typical (usual) weather in Faroe Islands in February is this: The average highest temperature in Faroe Islands in February is 6.2 ℃ (43.16 ℉). The average lowest temperature is 2.2 ℃ (35.96 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 5.75 ℃ (42.35 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 6.25 ℃ (43.25 ℉). The average number of rainy days in February is 22.9. The average rainfall is 93.1 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 7:24 (hours and minutes), in the middle of the month 8:50 and at the end of the month 10:19.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.Typical (usual) weather in Faroe Islands in March is this: The average highest temperature in Faroe Islands in March is 6.3 ℃ (43.34 ℉). The average lowest temperature is 2.2 ℃ (35.96 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 6.25 ℃ (43.25 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 6.75 ℃ (44.15 ℉). The average number of rainy days in March is 25.8. The average rainfall is 134.1 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 10:19 (hours and minutes), in the middle of the month 11:49 and at the end of the month 13:18.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.Typical (usual) weather in Faroe Islands in April is this: The average highest temperature in Faroe Islands in April is 7.2 ℃ (44.96 ℉). The average lowest temperature is 3.2 ℃ (37.76 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 6.75 ℃ (44.15 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 8.3 ℃ (46.94 ℉). The average number of rainy days in April is 22.5. The average rainfall is 86.4 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 13:18 (hours and minutes), in the middle of the month 14:47 and at the end of the month 16:16.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.Typical (usual) weather in Faroe Islands in May is this: The average highest temperature in Faroe Islands in May is 9.4 ℃ (48.92 ℉). The average lowest temperature is 5.2 ℃ (41.36 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 8.3 ℃ (46.94 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 10.4 ℃ (50.72 ℉). The average number of rainy days in May is 19.2. The average rainfall is 71.4 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 16:16 (hours and minutes), in the middle of the month 17:41 and at the end of the month 18:54.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.Typical (usual) weather in Faroe Islands in June is this: The average highest temperature in Faroe Islands in June is 11.4 ℃ (52.52 ℉). The average lowest temperature is 7.1 ℃ (44.78 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 10.4 ℃ (50.72 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 12.3 ℃ (54.14 ℉). The average number of rainy days in June is 18.4. The average rainfall is 62 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 18:54 (hours and minutes), in the middle of the month 19:40 and at the end of the month 19:38.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.Typical (usual) weather in Faroe Islands in July is this: The average highest temperature in Faroe Islands in July is 13.2 ℃ (55.76 ℉). The average lowest temperature is 8.4 ℃ (47.12 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 12.3 ℃ (54.14 ℉). At the end of July you can expect higher temperatures, the average highest temperature is around 13.25 ℃ (55.85 ℉). The average number of rainy days in July is 19.3. The average rainfall is 71.4 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 19:38 (hours and minutes), in the middle of the month 18:50 and at the end of the month 17:36.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.Typical (usual) weather in Faroe Islands in August is this: The average highest temperature in Faroe Islands in August is 13.3 ℃ (55.94 ℉). The average lowest temperature is 9.2 ℃ (48.56 ℉). At the beginning of August you can expect lower temperatures, the average highest temperature is around 13.25 ℃ (55.85 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 12.2 ℃ (53.96 ℉). The average number of rainy days in August is 19.8. The average rainfall is 82.4 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 17:36 (hours and minutes), in the middle of the month 16:12 and at the end of the month 14:44.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.Typical (usual) weather in Faroe Islands in September is this: The average highest temperature in Faroe Islands in September is 11.1 ℃ (51.98 ℉). The average lowest temperature is 7.4 ℃ (45.32 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 12.2 ℃ (53.96 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 10.1 ℃ (50.18 ℉). The average number of rainy days in September is 23.6. The average rainfall is 127.6 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 14:44 (hours and minutes), in the middle of the month 13:16 and at the end of the month 11:48.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.Typical (usual) weather in Faroe Islands in October is this: The average highest temperature in Faroe Islands in October is 9.1 ℃ (48.38 ℉). The average lowest temperature is 5.2 ℃ (41.36 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 10.1 ℃ (50.18 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 8.1 ℃ (46.58 ℉). The average number of rainy days in October is 25.5. The average rainfall is 156.3 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 11:48 (hours and minutes), in the middle of the month 10:20 and at the end of the month 8:52.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.Typical (usual) weather in Faroe Islands in November is this: The average highest temperature in Faroe Islands in November is 7.1 ℃ (44.78 ℉). The average lowest temperature is 3.2 ℃ (37.76 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 8.1 ℃ (46.58 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 6.7 ℃ (44.06 ℉). The average number of rainy days in November is 25.9. The average rainfall is 124.5 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 8:52 (hours and minutes), in the middle of the month 7:27 and at the end of the month 6:11.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.Typical (usual) weather in Faroe Islands in December is this: The average highest temperature in Faroe Islands in December is 6.3 ℃ (43.34 ℉). The average lowest temperature is 2.2 ℃ (35.96 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 6.7 ℃ (44.06 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 5.8 ℃ (42.44 ℉). The average number of rainy days in December is 27.2. The average rainfall is 141.1 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 6:11 (hours and minutes), in the middle of the month 5:19 and at the end of the month 5:10.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.