When is the best time to go to Unalaska
The chart above shows the best time of year to visit Unalaska, United States. These are based on an analysis of weather averages such as temperature, rainfall and number of hours of sunshine. These ratings are based solely on the climate and do not take into account other factors such as accommodation prices and how busy it is likely to be.
Average temperatures in Unalaska
Unalaska weather by month
Please note our recommendations for when to visit Unalaska are based solely on the weather and do not take into accounts accommodation prices, how busy it will be and what events are on.
January
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 2°C | 77mm | 6.5hrs | 9.5hrs | 5°C |
Cold and reasonably dry weather often prevails in Unalaska during the month of January
Although outside the main holiday season, there is still plenty of reasonably acceptable weather around this time of year. This makes it an okay time to visit Unalaska.
January is in the winter in Unalaska and is typically the coldest month of the year. Daytime maximum temperatures average around a freezing 2°C (35°F), whilst at night -3°C (27°F) is normal.
On average January is the driest month of the year in Unalaska with around 77mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 19 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.5 hours of sunshine per day.
February
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 0°C | 60mm | 7.6hrs | 11.1hrs | 4°C |
February in Unalaska is generally reasonably dry with the temperature being cold.
It is perhaps the perfect month to visit Unalaska, with some particularly good weather at this time of year.
February is in the winter in Unalaska and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a freezing 1°C (33°F), whilst at night -4°C (24°F) is normal.
On average February is the 2nd driest month of the year in Unalaska with around 60mm 2.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.6 hours of sunshine per day.
Unalaska weather in February »
March
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 1°C | 61mm | 8hrs | 13hrs | 4°C |
The weather in March in Unalaska is characteristically cold and reasonably dry.
Although outside the main holiday season, there is still plenty of reasonably acceptable weather around this time of year. This makes it an okay time to visit Unalaska.
March is in the spring in Unalaska and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a freezing 2°C (35°F), whilst at night -4°C (26°F) is normal.
On average March is the 3rd driest month of the year in Unalaska with around 61mm 2.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 8 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 3°C | 53mm | 8hrs | 15.3hrs | 4°C |
Unalaska's weather in April is typically cool and reasonably dry in nature.
It is perhaps the perfect month to visit Unalaska, with some particularly good weather at this time of year.
April is in the spring in Unalaska and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cold 3°C (37°F), whilst at night -2°C (29°F) is normal.
On average April is the 4th driest month of the year in Unalaska with around 53mm 2.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 8 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 5°C | 54mm | 8.5hrs | 17.4hrs | 5°C |
May is a reasonably dry month in Unalaska and the temperature is generally cool.
It is perhaps a good month to visit Unalaska, with some particularly good weather at this time of year.
May is in the spring in Unalaska and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a cold 6°C (43°F), whilst at night 1°C (34°F) is normal.
On average May is the 5th driest month of the year in Unalaska with around 54mm 2.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.5 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 8°C | 50mm | 8.2hrs | 9.5hrs | 7°C |
Cool and reasonably dry weather often prevails in Unalaska during the month of June
It is perhaps a good month to visit Unalaska, with some extremely good weather at this time of year.
June is in the summer in Unalaska and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a cool 9°C (48°F), whilst at night 4°C (39°F) is normal.
On average June is the 6th driest month of the year in Unalaska with around 50mm 2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.2 hours of sunshine per day.
July
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 10°C | 61mm | 7.7hrs | 11.1hrs | 9°C |
July in Unalaska is generally reasonably dry with the temperature being cool.
It is perhaps a good month to visit Unalaska, with some extremely good weather at this time of year.
July is in the summer in Unalaska and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 11°C (52°F), whilst at night 7°C (44°F) is normal.
On average July is the 6th wettest month of the year in Unalaska with around 61mm 2.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.7 hours of sunshine per day.
August
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 11°C | 84mm | 7.4hrs | 13hrs | 10°C |
The weather in August in Unalaska is characteristically cool and a little damp.
It is perhaps a good month to visit Unalaska, with some surprisingly good weather at this time of year.
August is in the summer in Unalaska and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 12°C (54°F), whilst at night 8°C (46°F) is normal.
On average August is the 5th wettest month of the year in Unalaska with around 84mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 20 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.4 hours of sunshine per day.
September
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 10°C | 100mm | 7.2hrs | 15.3hrs | 10°C |
Unalaska's weather in September is typically cool and damp in nature.
Although outside the main holiday season, there is still plenty of quite acceptable weather around this time of year. This makes it an okay time to visit Unalaska.
September is in the fall / autumn in Unalaska and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 11°C (51°F), whilst at night 6°C (43°F) is normal.
On average September is the 4th wettest month of the year in Unalaska with around 100mm 3.9 inches of rain making it a damp time to visit. This rainfall is typically spread over 21 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.2 hours of sunshine per day.
Unalaska weather in September »
October
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 7°C | 104mm | 6.3hrs | 17.4hrs | 8°C |
October is a damp month in Unalaska and the temperature is generally cool.
Based on weather alone, this is probably a time of year to avoid going to Unalaska for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
October is in the fall / autumn in Unalaska and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a cold 7°C (45°F), whilst at night 2°C (36°F) is normal.
On average October is the 3rd wettest month of the year in Unalaska with around 104mm 4.1 inches of rain making it a damp time to visit. This rainfall is typically spread over 23 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.3 hours of sunshine per day.
November
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 4°C | 109mm | 5.8hrs | 9.5hrs | 7°C |
Cool and damp weather often prevails in Unalaska during the month of November
Based on weather alone, this is probably a time of year to avoid going to Unalaska for your holidays. The weather is often not a good and not conducive to spending time outdoors.
November is in the fall / autumn in Unalaska and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a cold 5°C (41°F), whilst at night -0°C (32°F) is normal.
On average November is the 2nd wettest month of the year in Unalaska with around 109mm 4.3 inches of rain making it a damp time to visit. This rainfall is typically spread over 22 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.8 hours of sunshine per day.
Unalaska weather in November »
December
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 3°C | 94mm | 6hrs | 11.1hrs | 5°C |
December in Unalaska is generally a little damp with the temperature being cool.
Although outside the main holiday season, there is still plenty of reasonably acceptable weather around this time of year. This makes it an okay time to visit Unalaska.
December is in the winter in Unalaska and is typically the warmest month of the year. Daytime maximum temperatures average around a cold 3°C (38°F), whilst at night -2°C (29°F) is normal.
On average December is the wettest month of the year in Unalaska with around 94mm 3.7 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 21 days, although this may vary considerably.
On the flip side this corresponds to an average of 6 hours of sunshine per day.
Other monthly averages
Unalaska weather stats
| Hottest month: | August | 11.9°C 53.4°F |
|---|---|---|
| Driest month: | June | 50mm 2ins |
| Sunniest month: | February | 7.6hrs |
| Coldest month: | February | 0.4°C 32.7°F |
| Wettest month: | November | 109mm 4.3ins |
| Warmest sea: | August | 10.3°C 50.5°F |
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